build: adopt Go 1.24 and use tool directives for dev tools

Migrate from the old tools.go pattern (with a separate build/ module)
to Go 1.24's native tool directive support.

Changes:
- Update go.mod to Go 1.24.0 with tool directive block
- Remove build/go.mod, build/tools.go, and related scripts
- Update Makefile to use 'go tool' instead of installed binaries
- GOCOVMERGE now uses '$(GO) tool gocovmerge'
- lint/format targets use '$(GO) tool golangci-lint/goimports'

Note: protoc plugins still require 'go install tool' because protoc
doesn't yet support 'go tool' directly.

Ref: https://go.dev/doc/modules/managing-dependencies#tools

.circleci/config.yml

@@ -1,5 +1,8 @@
 version: 2.1
-
+orbs:
+  # NB: this is not the Go version, but the Orb version
+  # https://circleci.com/developer/orbs/orb/circleci/go#usage-go-modules-cache
+  go: circleci/go@1.11.0
 commands:
   setup-home-local-bin:
     steps:
@@ -12,132 +15,64 @@ commands:
               echo "$line" >> $BASH_ENV
             fi
 
-  invoke-lazy-sh:
-    parameters:
-      subcommand:
-        type: string
-    steps:
-      - run:
-          environment:
-            TERM: xterm
-          command: ./lazy.sh <<parameters.subcommand>>
-
   apt-update-and-install-common-deps:
     steps:
-      - run: sudo apt update && sudo apt install gawk make
+      - run: sudo apt-get update
+      - run: sudo apt-get install -y gawk make
+      # CircleCI doesn't update its cimg/go images.
+      # So, need to update manually to get up-to-date trust chains.
+      # The need for this was required for cimg/go:1.12, but let's future proof this here and now.
+      - run: sudo apt-get install -y git ca-certificates
 
-  restore-cache-gomod:
-    steps:
-      - restore_cache:
-          key: go-mod-v4-{{ checksum "go.sum" }}
-  save-cache-gomod:
-    steps:
-      - save_cache:
-          key: go-mod-v4-{{ checksum "go.sum" }}
-          paths:
-            - "/go/pkg/mod"
-
-  install-godep:
-    steps:
-      - apt-update-and-install-common-deps
-      - invoke-lazy-sh:
-          subcommand: godep
 
   install-docdep:
     steps:
       - apt-update-and-install-common-deps
       - run: sudo apt install python3 python3-pip libgirepository1.0-dev
-      - invoke-lazy-sh:
-          subcommand: docdep
+      - run: pip3 install -r docs/requirements.txt
 
-  download-and-install-minio-client:
-    steps:
-      - setup-home-local-bin
-      - restore_cache:
-          key: minio-client-v2
-      - run:
-          shell: /bin/bash -eo pipefail
-          command: |
-            if which mc; then exit 0; fi
-            sudo curl -sSL https://dl.min.io/client/mc/release/linux-amd64/archive/mc.RELEASE.2020-08-20T00-23-01Z \
-              -o "$HOME/.local/bin/mc"
-            sudo chmod +x "$HOME/.local/bin/mc"
-      - save_cache:
-          key: minio-client-v2
-          paths:
-            - "$HOME/.local/bin/mc"
-
-  upload-minio:
+  docs-publish-sh:
     parameters:
-      src:
-        type: string
-      dst:
-        type: string
+      push:
+        type: boolean
     steps:
+      - checkout
       - run:
-          shell: /bin/bash -eo pipefail
-          when: always
           command: |
-            if [ -n "$CIRCLE_PR_NUMBER" ]; then # CIRCLE_PR_NUMBER is guaranteed to be only present in forked PRs (external)
-              echo "Forked PR detected. Sry, can't trust you with credentials to external artifact store, use CircleCI's instead."
-              exit 0
-            fi
-            set -u # from now on
+            git config --global user.email "zreplbot@cschwarz.com"
+            git config --global user.name "zrepl-github-io-ci"
 
-            mc config host add --api s3v4 zrepl-minio https://minio.cschwarz.com ${MINIO_ACCESS_KEY} ${MINIO_SECRET_KEY}
-
-            # keep in sync with set-github-minio-status
-            jobprefix=zrepl-ci-artifacts/${CIRCLE_SHA1}-pipeline-<<pipeline.number>>/${CIRCLE_JOB}
-
-            # Upload artifacts
-            mkdir -p ./artifacts
-            mc cp -r <<parameters.src>> "zrepl-minio/$jobprefix/<<parameters.dst>>"
-
-  set-github-minio-status:
-    parameters:
-      context:
-        type: string
-      description:
-        type: string
-      minio-dst:
-        type: string
+      # if we're pushing, we need to add the deploy key
+      # which is stored as "Additional SSH Keys" in the CircleCI project settings.
+      # We can't use the CircleCI-manage deploy key because we're pushing
+      # to a different repo than the one we're building.
+      - when:
+          condition: << parameters.push >>
           steps:
+            # https://circleci.com/docs/2.0/add-ssh-key/#adding-multiple-keys-with-blank-hostnames
+            - run: ssh-add -D
+            # the default circleci ssh config only additional ssh keys for Host !github.com
             - run:
-          shell: /bin/bash -eo pipefail
                 command: |
-            if [ -n "$CIRCLE_PR_NUMBER" ]; then # CIRCLE_PR_NUMBER is guaranteed to be only present in forked PRs (external)
-              echo "Forked PR detected. Sry, can't trust you with credentials to external artifact store, use CircleCI's instead."
-              exit 0
-            fi
-            set -u # from now on
+                  cat > ~/.ssh/config \<<EOF
+                  Host *
+                    IdentityFile /home/circleci/.ssh/id_rsa_458e62c517f6c480e40452126ce47421
+                  EOF
+            - add_ssh_keys:
+                fingerprints:
+                  # deploy key for zrepl.github.io
+                  - "45:8e:62:c5:17:f6:c4:80:e4:04:52:12:6c:e4:74:21"
 
-            # keep in sync with with upload-minio command
-            jobprefix=zrepl-ci-artifacts/${CIRCLE_SHA1}-pipeline-<<pipeline.number>>/${CIRCLE_JOB}
-            # Push Artifact Link to GitHub
-            REPO="zrepl/zrepl"
-            COMMIT="${CIRCLE_SHA1}"
-            JOB_NAME="${CIRCLE_JOB}"
-            CONTEXT="<<parameters.context>>"
-            DESCRIPTION="<<parameters.description>>"
-            TARGETURL=https://minio.cschwarz.com/minio/"$jobprefix"/"<<parameters.minio-dst>>"
-            curl "https://api.github.com/repos/$REPO/statuses/$COMMIT" \
-              -H "Content-Type: application/json" \
-              -H "Authorization: token $GITHUB_COMMIT_STATUS_TOKEN" \
-              -X POST \
-              -d '{"context":"'"$CONTEXT"'", "state": "success", "description":"'"$DESCRIPTION"'", "target_url":"'"$TARGETURL"'"}'
-
-
-  trigger-pipeline:
-    parameters:
-      body_no_shell_subst:
-        type: string
+      # caller must install-docdep
+      - when:
+          condition: << parameters.push >>
           steps:
-      - run: |
-          curl -X POST https://circleci.com/api/v2/project/github/zrepl/zrepl/pipeline \
-            -H 'Content-Type: application/json' \
-            -H 'Accept: application/json' \
-            -H "Circle-Token: $ZREPL_BOT_CIRCLE_TOKEN" \
-            --data '<<parameters.body_no_shell_subst>>'
+            - run: bash -x docs/publish.sh -c -a -P
+      - when:
+          condition:
+            not: << parameters.push >>
+          steps:
+            - run: bash -x docs/publish.sh -c -a
 
 parameters:
   do_ci:
@@ -148,10 +83,6 @@ parameters:
     type: boolean
     default: false
 
-  release_docker_baseimage_tag:
-    type: string
-    default: "1.15"
-
 workflows:
   version: 2
 
@@ -159,20 +90,20 @@ workflows:
     when: << pipeline.parameters.do_ci >>
     jobs:
       - quickcheck-docs
-      - quickcheck-go: &quickcheck-go-smoketest
-          name: quickcheck-go-amd64-linux-1.15
-          goversion: &latest-go-release "1.15"
+      - quickcheck-go:
+          name: quickcheck-go-amd64-linux-1.23.1
+          goversion: &latest-go-release "1.23.1"
           goos: linux
           goarch: amd64
-      - test-go-on-latest-go-release:
+      - test-go:
           goversion: *latest-go-release
       - quickcheck-go:
           requires:
-            - quickcheck-go-amd64-linux-1.15 #quickcheck-go-smoketest.name
-          matrix: &quickcheck-go-matrix
+            - quickcheck-go-amd64-linux-1.23.1 #quickcheck-go-smoketest.name
+          matrix:
             alias: quickcheck-go-matrix
             parameters:
-              goversion: [*latest-go-release, "1.11"]
+              goversion: [*latest-go-release, "1.22.7"]
               goos: ["linux", "freebsd"]
               goarch: ["amd64", "arm64"]
             exclude:
@@ -180,10 +111,15 @@ workflows:
               - goversion: *latest-go-release
                 goos: linux
                 goarch: amd64
-              # not supported by Go 1.11
-              - goversion: "1.11"
-                goos: freebsd
-                goarch: arm64
+      - platformtest:
+          matrix:
+            parameters:
+              goversion: [*latest-go-release]
+              goos: ["linux"]
+              goarch: ["amd64"]
+          requires:
+            - test-go
+            - quickcheck-go-<< matrix.goarch >>-<< matrix.goos >>-<< matrix.goversion >>
 
   release:
     when: << pipeline.parameters.do_release >>
@@ -201,20 +137,7 @@ workflows:
             - release-deb
             - release-rpm
 
-  periodic:
-    triggers:
-      - schedule:
-          cron: "00 17 * * *"
-          filters:
-            branches:
-              only:
-                - master
-                - stable
-                - problame/circleci-build
-    jobs:
-      - periodic-full-pipeline-run
-
-  zrepl.github.io:
+  publish-zrepl.github.io:
     jobs:
       - publish-zrepl-github-io:
           filters:
@@ -225,22 +148,15 @@ workflows:
 jobs:
   quickcheck-docs:
     docker:
-      - image: cimg/base:2020.08
+      - image: cimg/base:2024.09
     steps:
       - checkout
       - install-docdep
+      # do the current docs build
       - run: make docs
-
-      - store_artifacts:
-          path: artifacts
-      - download-and-install-minio-client
-      - upload-minio:
-          src: artifacts
-          dst: ""
-      - set-github-minio-status:
-          context: artifacts/${CIRCLE_JOB}
-          description: artifacts of CI job ${CIRCLE_JOB}
-          minio-dst: ""
+      # does the publish.sh script still work?
+      - docs-publish-sh:
+          push: false
 
   quickcheck-go:
     parameters:
@@ -251,60 +167,98 @@ jobs:
       goarch:
         type: string
     docker:
-      - image: circleci/golang:<<parameters.goversion>>
+      # any toolchain >= 1.22 will auto-download GOTOOLCHAIN
+      - image: &cimg_with_modern_go cimg/go:1.22
     environment:
       GOOS: <<parameters.goos>>
       GOARCH: <<parameters.goarch>>
+      GOTOOLCHAIN: "go<<parameters.goversion>>"
 
     steps:
       - checkout
 
-      - restore-cache-gomod
+      - go/load-cache:
+          key: quickcheck-<<parameters.goversion>>
+      - run: make build/install
       - run: go mod download
       - run: cd build && go mod download
-      - save-cache-gomod
+      - go/save-cache:
+          key: quickcheck-<<parameters.goversion>>
 
-      - install-godep
-      - run: make formatcheck
-      - run: make generate-platform-test-list
+      # ensure all code has been generated
+      - run: make generate
+      - run: |
+          if output=$(git status --porcelain) && [ -z "$output" ]; then
+            echo "Working directory clean"
+          else
+            echo "Uncommitted changes"
+            echo ""
+            echo "$output"
+            exit 1
+          fi
+
+      # other checks
       - run: make zrepl-bin test-platform-bin
       - run: make vet
       - run: make lint
 
-      - download-and-install-minio-client
-      - run: rm -f artifacts/generate-platform-test-list
       - store_artifacts:
           path: artifacts
-      - upload-minio:
-          src: artifacts
-          dst: ""
-      - set-github-minio-status:
-          context: artifacts/${CIRCLE_JOB}
-          description: artifacts of CI job ${CIRCLE_JOB}
-          minio-dst: ""
+      - persist_to_workspace:
+          root: .
+          paths: [.]
 
-  test-go-on-latest-go-release:
+  platformtest:
+    parameters:
+      goversion:
+        type: string
+      goos:
+        type: string
+      goarch:
+        type: string
+    machine:
+      image: ubuntu-2204:current
+    resource_class: medium
+    environment:
+      GOOS: <<parameters.goos>>
+      GOARCH: <<parameters.goarch>>
+    steps:
+      - attach_workspace:
+          at: .
+      - run: sudo apt-get update
+      - run: sudo apt-get install -y zfsutils-linux
+      - run: sudo zfs version
+      - run: sudo make test-platform GOOS="$GOOS" GOARCH="$GOARCH"
+
+  test-go:
     parameters:
       goversion:
         type: string
     docker:
-      - image: circleci/golang:<<parameters.goversion>>
+      - image: *cimg_with_modern_go
+    environment:
+      GOTOOLCHAIN: "go<<parameters.goversion>>"
     steps:
       - checkout
-      - restore-cache-gomod
+      - go/load-cache:
+          key: make-test-go
       - run: make test-go
-      # don't save-cache-gomod here, test-go doesn't pull all the dependencies
+      - go/save-cache:
+          key: make-test-go
 
   release-build:
-    machine: true
+    machine:
+      image: &release-vm-image "ubuntu-2404:current"
+    resource_class: large
     steps:
       - checkout
-      - run: make release-docker RELEASE_DOCKER_BASEIMAGE_TAG=<<pipeline.parameters.release_docker_baseimage_tag>>
+      - run: make release-docker
       - persist_to_workspace:
           root: .
           paths: [.]
   release-deb:
-    machine: true
+    machine:
+      image: *release-vm-image
     steps:
       - attach_workspace:
           at: .
@@ -315,7 +269,8 @@ jobs:
             - "artifacts/*.deb"
 
   release-rpm:
-    machine: true
+    machine:
+      image: *release-vm-image
     steps:
       - attach_workspace:
           at: .
@@ -327,52 +282,19 @@ jobs:
 
   release-upload:
     docker:
-      - image: cimg/base:2020.08
+      - image: cimg/base:2024.09
     steps:
       - attach_workspace:
           at: .
+      - run: make wrapup-and-checksum
       - store_artifacts:
-          path: artifacts
-      - download-and-install-minio-client
-      - upload-minio:
-          src: artifacts
-          dst: ""
-      - set-github-minio-status:
-          context: artifacts/release
-          description: CI-generated release artifacts
-          minio-dst: ""
-
-  periodic-full-pipeline-run:
-    docker:
-      - image: cimg/base:2020.08
-    steps:
-      - trigger-pipeline:
-          body_no_shell_subst: '{"branch":"<<pipeline.git.branch>>", "parameters": { "do_ci": true, "do_release": true }}'
+          path: artifacts/release
 
   publish-zrepl-github-io:
     docker:
-      - image: cimg/python:3.7
+      - image: cimg/base:2024.09
     steps:
       - checkout
-      - invoke-lazy-sh:
-          subcommand: docdep
-      - run:
-          command: |
-            git config --global user.email "me@cschwarz.com"
-            git config --global user.name "zrepl-github-io-ci"
-
-      # https://circleci.com/docs/2.0/add-ssh-key/#adding-multiple-keys-with-blank-hostnames
-      - run: ssh-add -D
-      # the default circleci ssh config only additional ssh keys for Host !github.com
-      - run:
-          command: |
-            cat > ~/.ssh/config \<<EOF
-            Host *
-              IdentityFile /home/circleci/.ssh/id_rsa_458e62c517f6c480e40452126ce47421
-            EOF
-      - add_ssh_keys:
-          fingerprints:
-            # deploy key for zrepl.github.io
-            - "45:8e:62:c5:17:f6:c4:80:e4:04:52:12:6c:e4:74:21"
-
-      - run: bash -x docs/publish.sh -c -a
+      - install-docdep
+      - docs-publish-sh:
+          push: true

.circleci/download_artifacts.py

@@ -0,0 +1,84 @@
+import argparse
+from pathlib import Path
+import re
+
+import requests
+
+import time
+
+import os
+import argparse
+from pathlib import Path
+
+
+circle_token = os.environ.get('CIRCLE_TOKEN')
+if not circle_token:
+    raise ValueError('CIRCLE_TOKEN environment variable not set')
+
+parser = argparse.ArgumentParser(description='Download artifacts from CircleCI')
+parser.add_argument('build_num', type=str, help='Build number')
+parser.add_argument('dst', type=Path, help='Destination directory')
+parser.add_argument('--prefix', type=str, default='', help='Filter for prefix')
+parser.add_argument('--match', type=str, default='.*', help='Only include paths matching the given regex')
+
+args = parser.parse_args()
+
+res = requests.get(
+    f"https://circleci.com/api/v1.1/project/github/zrepl/zrepl/{args.build_num}/artifacts",
+    headers={
+        "Circle-Token": circle_token,
+    },
+)
+res.raise_for_status()
+
+# https://circleci.com/docs/api/v1/index.html#artifacts-of-a-job
+# [ {
+#   "path" : "raw-test-output/go-test-report.xml",
+#   "pretty_path" : "raw-test-output/go-test-report.xml",
+#   "node_index" : 0,
+#   "url" : "https://24-88881093-gh.circle-artifacts.com/0/raw-test-output/go-test-report.xml"
+# }, {
+#   "path" : "raw-test-output/go-test.out",
+#   "pretty_path" : "raw-test-output/go-test.out",
+#   "node_index" : 0,
+#   "url" : "https://24-88881093-gh.circle-artifacts.com/0/raw-test-output/go-test.out"
+# } ]
+res = res.json()
+
+for artifact in res:
+    if not artifact["pretty_path"].startswith(args.prefix):
+        continue
+    if not re.match(args.match, artifact["pretty_path"]):
+        continue
+    stripped = artifact["pretty_path"][len(args.prefix):]
+    print(f"Downloading {artifact['pretty_path']} to {args.dst / stripped}")
+    artifact_rel = Path(stripped)
+    artifact_dst = args.dst / artifact_rel
+    artifact_dst.parent.mkdir(parents=True, exist_ok=True)
+
+    res = requests.get(
+        artifact["url"],
+        headers={
+            "Circle-Token": circle_token,
+        },
+        stream=True,
+    )
+    res.raise_for_status()
+
+    total_size = int(res.headers.get("Content-Length", 0))
+    block_size = 128 * 1024
+    with open(artifact_dst, "wb") as f:
+        progress = 0
+        start_time = time.time()
+        for chunk in res.iter_content(chunk_size=block_size):
+            f.write(chunk)
+            progress += len(chunk)
+            percent = progress / total_size * 100
+            elapsed_time = time.time() - start_time
+            if elapsed_time >= 5:
+                print(f"Downloaded {progress}/{total_size} bytes ({percent:.2f}%)", end="\r")
+                start_time = time.time()
+        print(f"Downloaded {progress}/{total_size} bytes ({percent:.2f}%)")
+    print("Download complete!")
+
+print("All files downloaded")

.circleci/trigger_debian_binary_packaging_workflow.bash

@@ -1,10 +0,0 @@
-#!/usr/bin/env bash
-set -euo pipefail
-
-COMMIT="$1"
-GO_VERSION="$2"
-
-curl -v -X POST https://api.github.com/repos/zrepl/debian-binary-packaging/dispatches \
-    -H 'Accept: application/vnd.github.v3+json' \
-    -H "Authorization: token $GITHUB_ACCESS_TOKEN" \
-    --data '{"event_type": "push", "client_payload": { "zrepl_main_repo_commit": "'"$COMMIT"'", "go_version": "'"$GO_VERSION"'" }}'

.github/dependabot.yml

@@ -0,0 +1,9 @@
+version: 2
+updates:
+  # Docs use Python only for static site generation.
+  - package-ecosystem: "pip"
+    directory: /docs
+    schedule:
+      interval: "weekly"
+    ignore:
+      - dependency-name: "*"

.gitignore

@@ -32,3 +32,4 @@ _testmain.go
 *.exe
 *.test
 *.prof
+.venv/

.golangci.yml

@@ -1,10 +1,24 @@
 linters:
   enable:
   - goimports
+  - revive
+
+linters-settings:
+  goimports:
+    local-prefixes: github.com/zrepl/zrepl
+  revive:
+    rules:
+      - name: time-equal
 
 issues:
   exclude-rules:
     - path: _test\.go
       linters:
         - errcheck
+    # Disable staticcheck 'Empty body in an if or else branch' as it's useful
+    # to put a comment into an empty else-clause that explains why whatever
+    # is done in the if-caluse is not necessary if the condition is false.
+    - linters:
+        - staticcheck
+      text: "SA9003:"
 

Makefile

@@ -1,5 +1,5 @@
 .PHONY: generate build test vet cover release docs docs-clean clean format lint platformtest
-.PHONY: release bins-all release-noarch
+.PHONY: release release-noarch
 .DEFAULT_GOAL := zrepl-bin
 
 ARTIFACTDIR := artifacts
@@ -14,22 +14,25 @@ ifndef _ZREPL_VERSION
     endif
 endif
 
+ZREPL_PACKAGE_RELEASE := 1
+
 GO := go
 GOOS ?= $(shell bash -c 'source <($(GO) env) && echo "$$GOOS"')
 GOARCH ?= $(shell bash -c 'source <($(GO) env) && echo "$$GOARCH"')
 GOARM ?= $(shell bash -c 'source <($(GO) env) && echo "$$GOARM"')
 GOHOSTOS ?= $(shell bash -c 'source <($(GO) env) && echo "$$GOHOSTOS"')
 GOHOSTARCH ?= $(shell bash -c 'source <($(GO) env) && echo "$$GOHOSTARCH"')
-GO_ENV_VARS := GO111MODULE=on
+GO_ENV_VARS := CGO_ENABLED=0
 GO_LDFLAGS := "-X github.com/zrepl/zrepl/version.zreplVersion=$(_ZREPL_VERSION)"
 GO_MOD_READONLY := -mod=readonly
 GO_EXTRA_BUILDFLAGS :=
 GO_BUILDFLAGS := $(GO_MOD_READONLY) $(GO_EXTRA_BUILDFLAGS)
 GO_BUILD := $(GO_ENV_VARS) $(GO) build $(GO_BUILDFLAGS) -ldflags $(GO_LDFLAGS)
-GOLANGCI_LINT := golangci-lint
-GOCOVMERGE := gocovmerge
-RELEASE_DOCKER_BASEIMAGE_TAG ?= 1.15
-RELEASE_DOCKER_BASEIMAGE ?= golang:$(RELEASE_DOCKER_BASEIMAGE_TAG)
+GOCOVMERGE := $(GO) tool gocovmerge
+RELEASE_GOVERSION ?= go1.24.0
+STRIPPED_GOVERSION := $(subst go,,$(RELEASE_GOVERSION))
+RELEASE_DOCKER_BASEIMAGE ?= golang:$(STRIPPED_GOVERSION)
+RELEASE_DOCKER_CACHEMOUNT :=
 
 ifneq ($(GOARM),)
 	ZREPL_TARGET_TUPLE := $(GOOS)-$(GOARCH)v$(GOARM)
@@ -37,34 +40,46 @@ else
 	ZREPL_TARGET_TUPLE := $(GOOS)-$(GOARCH)
 endif
 
-.PHONY: printvars
-printvars:
-	@echo GOOS=$(GOOS)
-	@echo GOARCH=$(GOARCH)
-	@echo GOARM=$(GOARM)
 
+ifneq ($(RELEASE_DOCKER_CACHEMOUNT),)
+	_RELEASE_DOCKER_CACHEMOUNT := -v $(RELEASE_DOCKER_CACHEMOUNT)/mod:/go/pkg/mod -v $(RELEASE_DOCKER_CACHEMOUNT)/xdg-cache:/root/.cache/go-build
+.PHONY: release-docker-mkcachemount
+release-docker-mkcachemount:
+	mkdir -p $(RELEASE_DOCKER_CACHEMOUNT)
+	mkdir -p $(RELEASE_DOCKER_CACHEMOUNT)/mod
+	mkdir -p $(RELEASE_DOCKER_CACHEMOUNT)/xdg-cache
+else
+	_RELEASE_DOCKER_CACHEMOUNT :=
+.PHONY: release-docker-mkcachemount
+release-docker-mkcachemount:
+	# nothing to do
+endif
 
 ##################### PRODUCING A RELEASE #############
-.PHONY: release wrapup-and-checksum check-git-clean sign clean
+.PHONY: release wrapup-and-checksum check-git-clean sign clean ensure-release-toolchain
 
-release: clean
-	# no cross-platform support for target test
-	$(MAKE) test-go
-	$(MAKE) bins-all
+ensure-release-toolchain:
+	# ensure the toolchain is actually the one we expect
+	test $(RELEASE_GOVERSION) = "$$($(GO_ENV_VARS) $(GO) env GOVERSION)"
+
+release: ensure-release-toolchain
+	$(MAKE) _run_make_foreach_target_tuple RUN_MAKE_FOREACH_TARGET_TUPLE_ARG="vet"
+	$(MAKE) _run_make_foreach_target_tuple RUN_MAKE_FOREACH_TARGET_TUPLE_ARG="lint"
+	$(MAKE) _run_make_foreach_target_tuple RUN_MAKE_FOREACH_TARGET_TUPLE_ARG="zrepl-bin"
+	$(MAKE) _run_make_foreach_target_tuple RUN_MAKE_FOREACH_TARGET_TUPLE_ARG="test-platform-bin"
 	$(MAKE) noarch
-	$(MAKE) wrapup-and-checksum
-	$(MAKE) check-git-clean
-ifeq (SIGN, 1)
-	$(make) sign
-endif
-	@echo "ZREPL RELEASE ARTIFACTS AVAILABLE IN artifacts/release"
 
-release-docker: $(ARTIFACTDIR)
-	sed 's/FROM.*!SUBSTITUTED_BY_MAKEFILE/FROM $(RELEASE_DOCKER_BASEIMAGE)/' build.Dockerfile > artifacts/release-docker.Dockerfile
-	docker build -t zrepl_release --pull -f artifacts/release-docker.Dockerfile .
-	docker run --rm -i -v $(CURDIR):/src -u $$(id -u):$$(id -g) \
+release-docker: $(ARTIFACTDIR) release-docker-mkcachemount
+	sed 's/FROM.*!SUBSTITUTED_BY_MAKEFILE/FROM $(RELEASE_DOCKER_BASEIMAGE)/' build/build.Dockerfile > $(ARTIFACTDIR)/build.Dockerfile
+	docker build -t zrepl_release --pull -f $(ARTIFACTDIR)/build.Dockerfile .
+	docker run --rm -i \
+		$(_RELEASE_DOCKER_CACHEMOUNT) \
+		-v $(CURDIR):/src -u $$(id -u):$$(id -g) \
 		zrepl_release \
-		make release GOOS=$(GOOS) GOARCH=$(GOARCH) GOARM=$(GOARM)
+		make release \
+			GOOS=$(GOOS) GOARCH=$(GOARCH) GOARM=$(GOARM) \
+			ZREPL_VERSION=$(ZREPL_VERSION) ZREPL_PACKAGE_RELEASE=$(ZREPL_PACKAGE_RELEASE) \
+			RELEASE_GOVERSION=$(RELEASE_GOVERSION)
 
 debs-docker:
 	$(MAKE) _debs_or_rpms_docker _DEB_OR_RPM=deb
@@ -81,9 +96,14 @@ rpm: $(ARTIFACTDIR) # artifacts/_zrepl.zsh_completion artifacts/bash_completion
 	$(eval _ZREPL_RPM_TOPDIR_ABS := $(CURDIR)/$(ARTIFACTDIR)/rpmbuild)
 	rm -rf "$(_ZREPL_RPM_TOPDIR_ABS)"
 	mkdir "$(_ZREPL_RPM_TOPDIR_ABS)"
-	mkdir -p "$(_ZREPL_RPM_TOPDIR_ABS)"/{SPECS,RPMS,BUILD,BUILDROOT}
-	sed "s/^Version:.*/Version:          $(_ZREPL_RPM_VERSION)/g" \
-	    packaging/rpm/zrepl.spec >  $(_ZREPL_RPM_TOPDIR_ABS)/SPECS/zrepl.spec
+	for d in BUILD BUILDROOT RPMS SOURCES SPECS SRPMS; do \
+		mkdir -p "$(_ZREPL_RPM_TOPDIR_ABS)/$$d"; \
+	done
+	sed \
+		-e "s/^Version:.*/Version:          $(_ZREPL_RPM_VERSION)/g" \
+		-e "s/^Release:.*/Release:          $(ZREPL_PACKAGE_RELEASE)/g" \
+	    packaging/rpm/zrepl.spec \
+		>  $(_ZREPL_RPM_TOPDIR_ABS)/SPECS/zrepl.spec
 
 	# see /usr/lib/rpm/platform
 ifeq ($(GOARCH),amd64)
@@ -110,13 +130,16 @@ rpm-docker:
 	docker build -t zrepl_rpm_pkg --pull -f packaging/rpm/Dockerfile .
 	docker run --rm -i -v $(CURDIR):/build/src -u $$(id -u):$$(id -g) \
 		zrepl_rpm_pkg \
-		make rpm GOOS=$(GOOS) GOARCH=$(GOARCH) GOARM=$(GOARM)
+		make rpm \
+			GOOS=$(GOOS) GOARCH=$(GOARCH) GOARM=$(GOARM) \
+			ZREPL_VERSION=$(ZREPL_VERSION) ZREPL_PACKAGE_RELEASE=$(ZREPL_PACKAGE_RELEASE)
+
 
 deb: $(ARTIFACTDIR) # artifacts/_zrepl.zsh_completion artifacts/bash_completion docs zrepl-bin
 
 	cp packaging/deb/debian/changelog.template packaging/deb/debian/changelog
 	sed -i 's/DATE_DASH_R_OUTPUT/$(shell date -R)/' packaging/deb/debian/changelog
-	VERSION="$(subst -,.,$(_ZREPL_VERSION))"; \
+	VERSION="$(subst -,.,$(_ZREPL_VERSION))-$(ZREPL_PACKAGE_RELEASE)"; \
 		export VERSION="$${VERSION#v}"; \
 		sed -i 's/VERSION/'"$$VERSION"'/' packaging/deb/debian/changelog
 
@@ -134,28 +157,36 @@ endif
 
 deb-docker:
 	docker build -t zrepl_debian_pkg --pull -f packaging/deb/Dockerfile .
+	# Use a small open file limit to make fakeroot work. If we don't
+	# specify it, docker daemon will use its file limit. I don't know
+	# what changed (Docker, its systemd service, its Go version). But I
+	# observed fakeroot iterating close(i) up to i > 1000000, which costs
+	# a good amount of CPU time and makes the build slow.
 	docker run --rm -i -v $(CURDIR):/build/src -u $$(id -u):$$(id -g) \
+		--ulimit nofile=1024:1024 \
 		zrepl_debian_pkg \
-		make deb GOOS=$(GOOS) GOARCH=$(GOARCH) GOARM=$(GOARM)
+		make deb \
+			GOOS=$(GOOS) GOARCH=$(GOARCH) GOARM=$(GOARM) \
+			ZREPL_VERSION=$(ZREPL_VERSION) ZREPL_PACKAGE_RELEASE=$(ZREPL_PACKAGE_RELEASE)
 
-# expects `release` target to have run before
+# expects `release`, `deb` & `rpm` targets to have run before
 NOARCH_TARBALL := $(ARTIFACTDIR)/zrepl-noarch.tar
 wrapup-and-checksum:
 	rm -f $(NOARCH_TARBALL)
 	tar --mtime='1970-01-01' --sort=name \
 		--transform 's/$(ARTIFACTDIR)/zrepl-$(_ZREPL_VERSION)-noarch/' \
 		--transform 's#dist#zrepl-$(_ZREPL_VERSION)-noarch/dist#' \
-		--transform 's#config/samples#zrepl-$(_ZREPL_VERSION)-noarch/config#' \
+		--transform 's#internal/config/samples#zrepl-$(_ZREPL_VERSION)-noarch/config#' \
 		-acf $(NOARCH_TARBALL) \
 		$(ARTIFACTDIR)/docs/html \
 		$(ARTIFACTDIR)/bash_completion \
 		$(ARTIFACTDIR)/_zrepl.zsh_completion \
 		$(ARTIFACTDIR)/go_env.txt \
 		dist \
-		config/samples
+		internal/config/samples
 	rm -rf "$(ARTIFACTDIR)/release"
 	mkdir -p "$(ARTIFACTDIR)/release"
-	cp -l $(ARTIFACTDIR)/zrepl-* \
+	cp -l $(ARTIFACTDIR)/zrepl* \
 		$(ARTIFACTDIR)/platformtest-* \
 		"$(ARTIFACTDIR)/release"
 	cd "$(ARTIFACTDIR)/release" && sha512sum $$(ls | sort) > sha512sum.txt
@@ -173,38 +204,47 @@ check-git-clean:
 		fi; \
 	fi;
 
+tag-release:
+	test -n "$(ZREPL_TAG_VERSION)" || exit 1
+	git tag -u '328A6627FA98061D!' -m "$(ZREPL_TAG_VERSION)" "$(ZREPL_TAG_VERSION)"
+
 sign:
-	gpg -u "89BC 5D89 C845 568B F578  B306 CDBD 8EC8 E27C A5FC" \
+	gpg -u '328A6627FA98061D!' \
 		--armor \
 		--detach-sign $(ARTIFACTDIR)/release/sha512sum.txt
 
 clean: docs-clean
 	rm -rf "$(ARTIFACTDIR)"
 
-##################### BINARIES #####################
-.PHONY: bins-all lint test-go test-platform cover-merge cover-html vet zrepl-bin test-platform-bin generate-platform-test-list
+download-circleci-release:
+	rm -rf "$(ARTIFACTDIR)"
+	mkdir -p "$(ARTIFACTDIR)/release"
+	python3 .circleci/download_artifacts.py --prefix 'artifacts/release/' "$(BUILD_NUM)" "$(ARTIFACTDIR)/release"
 
-BINS_ALL_TARGETS := zrepl-bin test-platform-bin vet lint
-GO_SUPPORTS_ILLUMOS := $(shell $(GO) version | gawk -F '.' '/^go version /{split($$0, comps, " "); split(comps[3], v, "."); if (v[1] == "go1" && v[2] >= 13) { print "illumos"; } else { print "noillumos"; }}')
-bins-all:
-	$(MAKE) $(BINS_ALL_TARGETS) GOOS=freebsd   GOARCH=amd64
-	$(MAKE) $(BINS_ALL_TARGETS) GOOS=freebsd   GOARCH=386
-	$(MAKE) $(BINS_ALL_TARGETS) GOOS=linux     GOARCH=amd64
-	$(MAKE) $(BINS_ALL_TARGETS) GOOS=linux     GOARCH=arm64
-	$(MAKE) $(BINS_ALL_TARGETS) GOOS=linux     GOARCH=arm     GOARM=7
-	$(MAKE) $(BINS_ALL_TARGETS) GOOS=linux     GOARCH=386
-	$(MAKE) $(BINS_ALL_TARGETS) GOOS=darwin    GOARCH=amd64
-	$(MAKE) $(BINS_ALL_TARGETS) GOOS=solaris   GOARCH=amd64
-ifeq ($(GO_SUPPORTS_ILLUMOS), illumos)
-	$(MAKE) $(BINS_ALL_TARGETS) GOOS=illumos   GOARCH=amd64
-else ifeq ($(GO_SUPPORTS_ILLUMOS), noillumos)
-	@echo "SKIPPING ILLUMOS BUILD BECAUSE GO VERSION DOESN'T SUPPORT IT"
-else
-	@echo "CANNOT DETERMINE WHETHER GO VERSION SUPPORTS GOOS=illumos"; exit 1
-endif
+##################### MULTI-ARCH HELPERS #####################
+
+_run_make_foreach_target_tuple:
+	if [ "$(RUN_MAKE_FOREACH_TARGET_TUPLE_ARG)" = "" ]; then \
+		echo "RUN_MAKE_FOREACH_TARGET_TUPLE_ARG must be set"; \
+		exit 1; \
+	fi
+	$(MAKE) $(RUN_MAKE_FOREACH_TARGET_TUPLE_ARG) GOOS=freebsd   GOARCH=amd64
+	$(MAKE) $(RUN_MAKE_FOREACH_TARGET_TUPLE_ARG) GOOS=freebsd   GOARCH=386
+	$(MAKE) $(RUN_MAKE_FOREACH_TARGET_TUPLE_ARG) GOOS=freebsd   GOARCH=arm	  GOARM=7
+	$(MAKE) $(RUN_MAKE_FOREACH_TARGET_TUPLE_ARG) GOOS=freebsd   GOARCH=arm64
+	$(MAKE) $(RUN_MAKE_FOREACH_TARGET_TUPLE_ARG) GOOS=linux     GOARCH=amd64
+	$(MAKE) $(RUN_MAKE_FOREACH_TARGET_TUPLE_ARG) GOOS=linux     GOARCH=arm64
+	$(MAKE) $(RUN_MAKE_FOREACH_TARGET_TUPLE_ARG) GOOS=linux     GOARCH=arm     GOARM=7
+	$(MAKE) $(RUN_MAKE_FOREACH_TARGET_TUPLE_ARG) GOOS=linux     GOARCH=386
+	$(MAKE) $(RUN_MAKE_FOREACH_TARGET_TUPLE_ARG) GOOS=darwin    GOARCH=amd64
+	$(MAKE) $(RUN_MAKE_FOREACH_TARGET_TUPLE_ARG) GOOS=solaris   GOARCH=amd64
+	$(MAKE) $(RUN_MAKE_FOREACH_TARGET_TUPLE_ARG) GOOS=illumos   GOARCH=amd64
+
+##################### REGULAR TARGETS #####################
+.PHONY: lint test-go test-platform cover-merge cover-html vet zrepl-bin test-platform-bin
 
 lint:
-	$(GO_ENV_VARS) $(GOLANGCI_LINT) run ./...
+	$(GO_ENV_VARS) $(GO) tool golangci-lint run ./...
 
 vet:
 	$(GO_ENV_VARS) $(GO) vet $(GO_BUILDFLAGS) ./...
@@ -225,9 +265,6 @@ endif
 zrepl-bin:
 	$(GO_BUILD) -o "$(ARTIFACTDIR)/zrepl-$(ZREPL_TARGET_TUPLE)"
 
-generate-platform-test-list:
-	$(GO_BUILD) -o $(ARTIFACTDIR)/generate-platform-test-list ./platformtest/tests/gen
-
 COVER_PLATFORM_BIN_PATH := $(ARTIFACTDIR)/platformtest-cover-$(ZREPL_TARGET_TUPLE)
 cover-platform-bin:
 	$(GO_ENV_VARS) $(GO) test $(GO_BUILDFLAGS) \
@@ -244,7 +281,7 @@ cover-platform:
 
 TEST_PLATFORM_BIN_PATH := $(ARTIFACTDIR)/platformtest-$(ZREPL_TARGET_TUPLE)
 test-platform-bin:
-	$(GO_BUILD) -o "$(TEST_PLATFORM_BIN_PATH)" ./platformtest/harness
+	$(GO_BUILD) -o "$(TEST_PLATFORM_BIN_PATH)" ./internal/platformtest/harness
 test-platform:
 	export _TEST_PLATFORM_CMD="\"$(TEST_PLATFORM_BIN_PATH)\""; \
 		$(MAKE) _test-or-cover-platform-impl
@@ -261,7 +298,7 @@ ifndef _TEST_PLATFORM_CMD
 endif
 	rm -f "$(ZREPL_PLATFORMTEST_ZFS_LOG)"
 	rm -f "$(ARTIFACTDIR)/platformtest.cover"
-	platformtest/logmockzfs/logzfsenv "$(ZREPL_PLATFORMTEST_ZFS_LOG)" `which zfs` \
+	internal/platformtest/logmockzfs/logzfsenv "$(ZREPL_PLATFORMTEST_ZFS_LOG)" `which zfs` \
 		$(_TEST_PLATFORM_CMD) \
 		-poolname "$(ZREPL_PLATFORMTEST_POOLNAME)" \
 		-imagepath "$(ZREPL_PLATFORMTEST_IMAGEPATH)" \
@@ -283,22 +320,38 @@ cover-full:
 
 ##################### DEV TARGETS #####################
 # not part of the build, must do that manually
-.PHONY: generate formatcheck format
+.PHONY: generate format
 
-generate: generate-platform-test-list
-	protoc -I=replication/logic/pdu --go_out=plugins=grpc:replication/logic/pdu replication/logic/pdu/pdu.proto
-	$(GO_ENV_VARS) $(GO) generate $(GO_BUILDFLAGS) -x ./...
+build/install:
+	rm -rf build/install.tmp
+	mkdir build/install.tmp
 
-GOIMPORTS := goimports -srcdir . -local 'github.com/zrepl/zrepl'
-FINDSRCFILES := find . -type f -name '*.go' -not -path "./vendor/*" -not -name '*.pb.go' -not -name '*_enumer.go'
+	-echo "installing protoc"
+	mkdir build/install.tmp/protoc
+	bash -x build/get_protoc.bash build/install.tmp/protoc
 
-formatcheck:
-	@# goimports doesn't have a knob to exit with non-zero status code if formatting is needed
-	@# see https://go-review.googlesource.com/c/tools/+/237378
-	@ affectedfiles=$$($(GOIMPORTS) -l $(shell $(FINDSRCFILES)) | tee /dev/stderr | wc -l); test "$$affectedfiles" = 0
+	-echo "installing protoc plugins to GOBIN"
+	$(GO) install tool
+
+	mv build/install.tmp build/install
+
+
+generate: build/install
+	# protoc plugins are installed via 'go install tool' in build/install target
+	build/install/protoc/bin/protoc \
+		-I=internal/replication/logic/pdu \
+		--go_out=internal/replication/logic/pdu --go-grpc_out=internal/replication/logic/pdu \
+		internal/replication/logic/pdu/pdu.proto
+	build/install/protoc/bin/protoc \
+		-I=internal/rpc/grpcclientidentity/example \
+		--go_out=internal/rpc/grpcclientidentity/example/pdu --go-grpc_out=internal/rpc/grpcclientidentity/example/pdu \
+		internal/rpc/grpcclientidentity/example/grpcauth.proto
+	$(GO) generate $(GO_BUILDFLAGS) -x ./...
+
+GOIMPORTS := $(GO) tool goimports -srcdir . -local 'github.com/zrepl/zrepl'
 
 format:
-	@ $(GOIMPORTS) -w -d $(shell  $(FINDSRCFILES))
+	@ $(GO) tool goimports -w -local 'github.com/zrepl/zrepl' $$(find . -type f -name '*.go' -not -path "./vendor/*" -not -name '*.pb.go' -not -name '*_enumer.go')
 
 ##################### NOARCH #####################
 .PHONY: noarch $(ARTIFACTDIR)/bash_completion $(ARTIFACTDIR)/_zrepl.zsh_completion $(ARTIFACTDIR)/go_env.txt docs docs-clean
@@ -326,12 +379,12 @@ $(ARTIFACTDIR)/go_env.txt:
 
 docs: $(ARTIFACTDIR)/docs
 	# https://www.sphinx-doc.org/en/master/man/sphinx-build.html
-	make -C docs \
+	$(MAKE) -C docs \
 		html \
 		BUILDDIR=../artifacts/docs \
 		SPHINXOPTS="-W --keep-going -n"
 
 docs-clean:
-	make -C docs \
+	$(MAKE) -C docs \
 		clean \
 		BUILDDIR=../artifacts/docs

README.md

@@ -1,11 +1,12 @@
 [![GitHub license](https://img.shields.io/github/license/zrepl/zrepl.svg)](https://github.com/zrepl/zrepl/blob/master/LICENSE)
-[![Language: Go](https://img.shields.io/badge/language-Go-6ad7e5.svg)](https://golang.org/)
+[![Language: Go](https://img.shields.io/badge/lang-Go-6ad7e5.svg)](https://golang.org/)
 [![User Docs](https://img.shields.io/badge/docs-web-blue.svg)](https://zrepl.github.io)
-[![Support me on Patreon](https://img.shields.io/badge/dynamic/json?color=yellow&label=Patreon&query=data.attributes.patron_count&suffix=%20patrons&url=https%3A%2F%2Fwww.patreon.com%2Fapi%2Fcampaigns%2F3095079)](https://patreon.com/zrepl)
+[![Support me on Patreon](https://img.shields.io/badge/dynamic/json?color=yellow&label=Patreon&query=data.attributes.patron_count&url=https%3A%2F%2Fwww.patreon.com%2Fapi%2Fcampaigns%2F3095079)](https://patreon.com/zrepl)
 [![Donate via GitHub Sponsors](https://img.shields.io/static/v1?label=Sponsor&message=%E2%9D%A4&logo=GitHub&style=flat&color=yellow)](https://github.com/sponsors/problame)
 [![Donate via Liberapay](https://img.shields.io/liberapay/patrons/zrepl.svg?logo=liberapay)](https://liberapay.com/zrepl/donate)
 [![Donate via PayPal](https://img.shields.io/badge/donate-paypal-yellow.svg)](https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=R5QSXJVYHGX96)
 [![Twitter](https://img.shields.io/twitter/url/https/github.com/zrepl/zrepl.svg?style=social)](https://twitter.com/intent/tweet?text=Wow:&url=https%3A%2F%2Fgithub.com%2Fzrepl%2Fzrepl)
+[![Chat](https://img.shields.io/badge/chat-matrix-blue.svg)](https://matrix.to/#/#zrepl:matrix.org)
 
 # zrepl
 zrepl is a one-stop ZFS backup & replication solution.
@@ -25,24 +26,40 @@ zrepl is a one-stop ZFS backup & replication solution.
    If so, think of an expressive configuration example.
 2. Think of at least one use case that generalizes from your concrete application.
 3. Open an issue on GitHub with example conf & use case attached.
-4. **Optional**: [Post a bounty](https://www.bountysource.com/teams/zrepl) on the issue, or [contact Christian Schwarz](https://cschwarz.com) for contract work.
+4. **Optional**: [Contact Christian Schwarz](https://cschwarz.com) for contract work.
 
 The above does not apply if you already implemented everything.
 Check out the *Coding Workflow* section below for details.
 
-## Building, Releasing, Downstream-Packaging
-
-This section provides an overview of the zrepl build & release process.
-Check out `docs/installation/compile-from-source.rst` for build-from-source instructions.
-
-### Overview
+## Development
 
 zrepl is written in [Go](https://golang.org) and uses [Go modules](https://github.com/golang/go/wiki/Modules) to manage dependencies.
 The documentation is written in [ReStructured Text](http://docutils.sourceforge.net/rst.html) using the [Sphinx](https://www.sphinx-doc.org) framework.
 
-Install **build dependencies** using  `./lazy.sh devsetup`.
-`lazy.sh` uses `python3-pip` to fetch the build dependencies for the docs - you might want to use a [venv](https://docs.python.org/3/library/venv.html).
-If you just want to install the Go dependencies, run `./lazy.sh godep`.
+### Building
+
+#### Go Code
+
+Dependencies:
+
+* Go 1.22 or newer
+* GNU Make
+* Git
+* wget (`make generate`)
+* unzip (`make generate`)
+
+Some Go code is **generated**, and generated code is committed to the source tree.
+Therefore, building does not require having code generation tools set up.
+When making changes that require code to be (re-)generated, run `make generate`.
+I downloads and installs pinned versions of the code generation tools into `./build/install`.
+There is a CI check that ensures Git state is clean, i.e., code generation has been done by a PR and is deterministic.
+
+#### Docs
+
+Set up a Python environment that has `docs/requirements.txt` installed via `pip`.
+Use a  [venv](https://docs.python.org/3/library/venv.html) to avoid global state.
+
+### Testing
 
 The **test suite** is split into pure **Go tests** (`make test-go`) and **platform tests** that interact with ZFS and thus generally **require root privileges** (`sudo make test-platform`).
 Platform tests run on their own pool with the name `zreplplatformtest`, which is created using the file vdev in `/tmp`.
@@ -50,33 +67,28 @@ Platform tests run on their own pool with the name `zreplplatformtest`, which is
 For a full **code coverage** profile, run `make test-go COVER=1 && sudo make test-platform && make cover-merge`.
 An HTML report can be generated using `make cover-html`.
 
-**Code generation** is triggered by `make generate`. Generated code is committed to the source tree.
+### Circle CI
 
-### Build & Release Process
+We use CircleCI for automated build & test pre- and post-merge.
 
-**The `Makefile` is catering to the needs of developers & CI, not distro packagers**.
-It provides phony targets for
-* local development (building, running tests, etc)
-* building a release in Docker (used by the CI & release management)
-* building .deb and .rpm packages out of the release artifacts.
-
-**Build tooling & dependencies** are documented as code in `lazy.sh`.
-Go dependencies are then fetched by the go command and pip dependencies are pinned through a `requirements.txt`.
-
-**We use CircleCI for continuous integration**.
 There are two workflows:
 
 * `ci` runs for every commit / branch / tag pushed to GitHub.
   It is supposed to run very fast (<5min and provides quick feedback to developers).
   It runs formatting checks, lints and tests on the most important OSes / architectures.
-  Artifacts are published to minio.cschwarz.com (see GitHub Commit Status).
 
 * `release` runs
   * on manual triggers through the CircleCI API (in order to produce a release)
   * periodically on `master`
-  Artifacts are published to minio.cschwarz.com (see GitHub Commit Status).
 
-**Releases** are issued via Git tags + GitHub Releases feature.
+Artifacts are stored in CircleCI.
+
+### Releasing
+
+All zrepl releases are git-tagged and then published as a GitHub Release.
+There is a git tag for each zrepl release, usually `vMAJOR.MINOR.0`.
+We don't move git tags once the release has been published.
+
 The procedure to issue a release is as follows:
 * Issue the source release:
   * Git tag the release on the `master` branch.
@@ -87,15 +99,35 @@ The procedure to issue a release is as follows:
   * Download the artifacts to the release manager's machine.
   * Create a GitHub release, edit the changelog, upload all the release artifacts, including .rpm and .deb files.
   * Issue the GitHub release.
-  * Add the .rpm and .deb files to the official zrepl repos, publish those.
+  * Add the .rpm and .deb files to the official zrepl repos.
+    * Code for management of these repos: https://github.com/zrepl/package-repo-ops (private repo at this time)
 
-**Official binary releases are not re-built when Go receives an update. If the Go update is critical to zrepl (e.g. a Go security update that affects zrepl), we'd issue a new source release**.
-The rationale for this is that whereas distros provide a mechanism for this (`$zrepl_source_release-$distro_package_revision`), GitHub Releases doesn't which means we'd need to update the existing GitHub release's assets, which nobody would notice (no RSS feed updates, etc.).
-Downstream packagers can read the changelog to determine whether they want to push that minor release into their distro or simply skip it.
+#### Patch releases, Go toolchain updates, APT/RPM Package rebuilds
 
-### Additional Notes to Distro Package Maintainers
+`vMAJOR.MINOR.0` is typically a tagged commit on `master`, because development velocity isn't high
+and thus release branches for stabilization aren't necessary.
 
-* Use `sudo make test-platform-bin && sudo make test-platform` **on a test system** to validate that zrepl's abstractions on top of ZFS work with the system ZFS.
+Occasionally though there is a need for patch changes to a release, e.g.
+- security issue in a dependency
+- Go toolchain update (e.g. security issue in standard library)
+
+The procedure for this is the following
+- create a branch off the release tag we need to patch, named `releases/MAJOR.MINOR.X`
+- that branch will never be merged into `master`, it'll be a dead-end for this specific patch
+- make changes in that branch
+- make the final commit that bumps version numbers
+- create the git tag
+- follow general procedure for publishing the release (previous sectino
+
+For Go toolchain updates and package rebuilds with no source code changes, leverage the APT/RPM package revision field.
+Control via the `ZREPL_PACKAGE_RELEASE` Makefile variable, see `origin/releases/0.6.1-2` for an example.
+
+
+
+## Notes to Distro Package Maintainers
+
+* The `Makefile` in this project is not suitable for builds in distros.
+* Run the platform tests (Docs -> Usage -> Platform Tests) **on a test system** to validate that zrepl's abstractions on top of ZFS work with the system ZFS.
 * Ship a default config that adheres to your distro's `hier` and logging system.
 * Ship a service manager file and _please_ try to upstream it to this repository.
   * `dist/systemd` contains a Systemd unit template.
@@ -104,31 +136,3 @@ Downstream packagers can read the changelog to determine whether they want to pu
   This is how `zrepl version` knows what version number to show.
   Your build system should set the `ldFlags` flags appropriately and add a prefix or suffix that indicates that the given zrepl binary is a distro build, not an official one.
 * Make sure you are informed about new zrepl versions, e.g. by subscribing to GitHub's release RSS feed.
-
-
-## Contributing Code
-
-* Open an issue when starting to hack on a new feature
-* Commits should reference the issue they are related to
-* Docs improvements not documenting new features do not require an issue.
-
-### Breaking Changes
-
-Backward-incompatible changes must be documented in the git commit message and are listed in `docs/changelog.rst`.
-
-### Glossary & Naming Inconsistencies
-
-In ZFS, *dataset* refers to the objects *filesystem*, *ZVOL* and *snapshot*. <br />
-However, we need a word for *filesystem* & *ZVOL* but not a snapshot, bookmark, etc.
-
-Toward the user, the following terminology is used:
-
-* **filesystem**: a ZFS filesystem or a ZVOL
-* **filesystem version**: a ZFS snapshot or a bookmark
-
-Sadly, the zrepl implementation is inconsistent in its use of these words:
-variables and types are often named *dataset* when they in fact refer to a *filesystem*.
-
-There will not be a big refactoring (an attempt was made, but it's destroying too much history without much gain).
-
-However, new contributions & patches should fix naming without further notice in the commit message.

build.Dockerfile

@@ -1,30 +0,0 @@
-FROM !SUBSTITUTED_BY_MAKEFILE
-
-RUN apt-get update && apt-get install -y \
-    python3-pip \
-    unzip \
-    gawk
-
-ADD build.installprotoc.bash ./
-RUN bash build.installprotoc.bash
-
-ADD lazy.sh /tmp/lazy.sh
-ADD docs/requirements.txt /tmp/requirements.txt
-ENV ZREPL_LAZY_DOCS_REQPATH=/tmp/requirements.txt
-RUN /tmp/lazy.sh docdep
-
-# prepare volume mount of git checkout to /zrepl
-RUN mkdir -p /src/github.com/zrepl/zrepl
-RUN mkdir -p /.cache && chmod -R 0777 /.cache
-
-# $GOPATH is /go
-# Go 1.12 doesn't use modules within GOPATH, but 1.13 and later do
-# => store source outside of GOPATH
-WORKDIR /src
-
-# Install build tools (e.g. protobuf generator, stringer) into $GOPATH/bin
-ADD build/ /tmp/build
-RUN /tmp/lazy.sh godep
-
-RUN chmod -R 0777 /go
-

build.installprotoc.bash

@@ -1,25 +0,0 @@
-#!/usr/bin/env bash
-set -euo pipefail
-set -x
-
-MACH=$(uname -m)
-MACH="${MACH/aarch64/aarch_64}"
-
-VERSION=3.6.1
-FILENAME=protoc-"$VERSION"-linux-"$MACH".zip
-
-if [ -e "$FILENAME" ]; then
-    echo "$FILENAME" already exists 1>&2
-    exit 1
-fi
-
-wget https://github.com/protocolbuffers/protobuf/releases/download/v"$VERSION"/"$FILENAME"
-
-stat "$FILENAME"
-
-sha256sum -c --ignore-missing <<EOF
-6003de742ea3fcf703cfec1cd4a3380fd143081a2eb0e559065563496af27807  protoc-3.6.1-linux-x86_64.zip
-af8e5aaaf39ddec62ec8dd2be1b8d9602c6da66564883a16393ade5f71170922  protoc-3.6.1-linux-aarch_64.zip
-EOF
-
-unzip -d /usr "$FILENAME"

build/.gitignore

@@ -0,0 +1 @@
+install/

build/build.Dockerfile

@@ -0,0 +1,22 @@
+FROM !SUBSTITUTED_BY_MAKEFILE
+
+RUN apt-get update && apt-get install -y \
+    python3-pip \
+    python3-venv \
+    unzip \
+    gawk
+
+# setup venv for docs
+ENV VIRTUAL_ENV=/opt/venv
+RUN python3 -m venv $VIRTUAL_ENV
+ENV PATH="$VIRTUAL_ENV/bin:$PATH"
+ADD docs/requirements.txt /tmp/requirements.txt
+RUN pip3 install -r /tmp/requirements.txt
+
+# Go toolchain uses xdg-cache
+RUN mkdir -p /.cache && chmod -R 0777 /.cache
+
+# Go devtools are managed by Makefile
+
+WORKDIR /src
+

build/get_protoc.bash

@@ -0,0 +1,27 @@
+#!/usr/bin/env bash
+set -euo pipefail
+set -x
+
+cd "$1"
+
+MACH=$(uname -m)
+MACH="${MACH/aarch64/aarch_64}"
+
+VERSION=28.0
+FILENAME=protoc-"$VERSION"-linux-"$MACH".zip
+
+if [ -e "$FILENAME" ]; then
+    echo "$FILENAME" already exists 1>&2
+    exit 1
+fi
+
+wget --continue https://github.com/protocolbuffers/protobuf/releases/download/v"$VERSION"/"$FILENAME"
+
+stat "$FILENAME"
+
+sha256sum -c --ignore-missing <<EOF
+d622619dcbfb5ecb281cfb92c1a74d6a0f42e752d9a2774b197f475f7ab1c8c4  protoc-28.0-linux-aarch_64.zip
+b2e187c8b9f2d97cd3ecae4926d1bb2cbebe3ab768e7c987cbc86bb17f319358  protoc-28.0-linux-x86_64.zip
+EOF
+
+unzip -d . "$FILENAME"

build/go.mod

@@ -1,52 +0,0 @@
-module github.com/zrepl/zrepl/build
-
-go 1.12
-
-require (
-	github.com/OpenPeeDeeP/depguard v0.0.0-20181229194401-1f388ab2d810 // indirect
-	github.com/alvaroloes/enumer v1.1.1
-	github.com/fatih/color v1.7.0 // indirect
-	github.com/go-critic/go-critic v0.3.4 // indirect
-	github.com/gogo/protobuf v1.2.1 // indirect
-	github.com/golang/mock v1.2.0 // indirect
-	github.com/golang/protobuf v1.2.0
-	github.com/golangci/errcheck v0.0.0-20181223084120-ef45e06d44b6 // indirect
-	github.com/golangci/go-tools v0.0.0-20190124090046-35a9f45a5db0 // indirect
-	github.com/golangci/gocyclo v0.0.0-20180528144436-0a533e8fa43d // indirect
-	github.com/golangci/gofmt v0.0.0-20181222123516-0b8337e80d98 // indirect
-	github.com/golangci/golangci-lint v1.17.1
-	github.com/golangci/gosec v0.0.0-20180901114220-8afd9cbb6cfb // indirect
-	github.com/golangci/lint-1 v0.0.0-20181222135242-d2cdd8c08219 // indirect
-	github.com/golangci/misspell v0.3.4 // indirect
-	github.com/golangci/revgrep v0.0.0-20180812185044-276a5c0a1039 // indirect
-	github.com/google/go-cmp v0.3.0 // indirect
-	github.com/konsorten/go-windows-terminal-sequences v1.0.2 // indirect
-	github.com/mitchellh/go-homedir v1.1.0 // indirect
-	github.com/pkg/errors v0.8.1 // indirect
-	github.com/sirupsen/logrus v1.4.2 // indirect
-	github.com/spf13/afero v1.2.2 // indirect
-	github.com/spf13/jwalterweatherman v1.1.0 // indirect
-	github.com/spf13/viper v1.3.2 // indirect
-	github.com/stretchr/testify v1.4.0 // indirect
-	github.com/wadey/gocovmerge v0.0.0-20160331181800-b5bfa59ec0ad // indirect
-	golang.org/x/net v0.0.0-20190613194153-d28f0bde5980 // indirect
-	golang.org/x/sys v0.0.0-20191010194322-b09406accb47 // indirect
-	golang.org/x/tools v0.0.0-20190524210228-3d17549cdc6b
-	mvdan.cc/unparam v0.0.0-20190310220240-1b9ccfa71afe // indirect
-	sourcegraph.com/sqs/pbtypes v1.0.0 // indirect
-)
-
-// invalid dates in transitive dependencies (first validated in Go 1.13, didn't fail in earlier Go versions)
-replace (
-	github.com/go-critic/go-critic v0.0.0-20181204210945-1df300866540 => github.com/go-critic/go-critic v0.3.5-0.20190526074819-1df300866540
-	github.com/go-critic/go-critic v0.0.0-20181204210945-ee9bf5809ead => github.com/go-critic/go-critic v0.3.5-0.20190210220443-ee9bf5809ead
-	github.com/golangci/errcheck v0.0.0-20181003203344-ef45e06d44b6 => github.com/golangci/errcheck v0.0.0-20181223084120-ef45e06d44b6
-	github.com/golangci/go-tools v0.0.0-20180109140146-35a9f45a5db0 => github.com/golangci/go-tools v0.0.0-20190124090046-35a9f45a5db0
-	github.com/golangci/go-tools v0.0.0-20180109140146-af6baa5dc196 => github.com/golangci/go-tools v0.0.0-20190318060251-af6baa5dc196
-	github.com/golangci/gofmt v0.0.0-20181105071733-0b8337e80d98 => github.com/golangci/gofmt v0.0.0-20181222123516-0b8337e80d98
-	github.com/golangci/gosec v0.0.0-20180901114220-66fb7fc33547 => github.com/golangci/gosec v0.0.0-20190211064107-66fb7fc33547
-	github.com/golangci/ineffassign v0.0.0-20180808204949-42439a7714cc => github.com/golangci/ineffassign v0.0.0-20190609212857-42439a7714cc
-	github.com/golangci/lint-1 v0.0.0-20180610141402-ee948d087217 => github.com/golangci/lint-1 v0.0.0-20190420132249-ee948d087217
-	golang.org/x/tools v0.0.0-20190125232054-379209517ffe => golang.org/x/tools v0.0.0-20190205201329-379209517ffe
-	mvdan.cc/unparam v0.0.0-20190124213536-fbb59629db34 => mvdan.cc/unparam v0.0.0-20190209190245-fbb59629db34
-)

build/go.sum

@@ -1,282 +1,580 @@
-github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
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-github.com/OpenPeeDeeP/depguard v0.0.0-20180806142446-a69c782687b2/go.mod h1:7/4sitnI9YlQgTLLk734QlzXT8DuHVnAyztLplQjk+o=
-github.com/OpenPeeDeeP/depguard v0.0.0-20181229194401-1f388ab2d810 h1:pFks+oaqVWDFq0KsLQZFB2pQGB5Us0HfMSBENtieXOs=
-github.com/OpenPeeDeeP/depguard v0.0.0-20181229194401-1f388ab2d810/go.mod h1:7/4sitnI9YlQgTLLk734QlzXT8DuHVnAyztLplQjk+o=
-github.com/StackExchange/wmi v0.0.0-20180116203802-5d049714c4a6/go.mod h1:3eOhrUMpNV+6aFIbp5/iudMxNCF27Vw2OZgy4xEx0Fg=
-github.com/alvaroloes/enumer v1.1.1 h1:v+1scNqEhSFAPb9tLwblQegeTXJhnw8hf9O0amTbOvQ=
-github.com/alvaroloes/enumer v1.1.1/go.mod h1:FxrjvuXoDAx9isTJrv4c+T410zFi0DtXIT0m65DJ+Wo=
-github.com/armon/consul-api v0.0.0-20180202201655-eb2c6b5be1b6/go.mod h1:grANhF5doyWs3UAsr3K4I6qtAmlQcZDesFNEHPZAzj8=
-github.com/coreos/etcd v3.3.10+incompatible/go.mod h1:uF7uidLiAD3TWHmW31ZFd/JWoc32PjwdhPthX9715RE=
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+4d63.com/gocheckcompilerdirectives v1.2.1 h1:AHcMYuw56NPjq/2y615IGg2kYkBdTvOaojYCBcRE7MA=
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build/tools.go

@@ -1,12 +0,0 @@
-// +build tools
-
-package main
-
-import (
-	_ "github.com/alvaroloes/enumer"
-	_ "github.com/golang/protobuf/protoc-gen-go"
-	_ "github.com/golangci/golangci-lint/cmd/golangci-lint"
-	_ "github.com/wadey/gocovmerge"
-	_ "golang.org/x/tools/cmd/goimports"
-	_ "golang.org/x/tools/cmd/stringer"
-)

client/status.go

@@ -1,816 +0,0 @@
-package client
-
-import (
-	"context"
-	"fmt"
-	"io"
-	"math"
-	"net/http"
-	"os"
-	"sort"
-	"strings"
-	"sync"
-	"time"
-
-	// tcell is the termbox-compatible library for abstracting away escape sequences, etc.
-	// as of tcell#252, the number of default distributed terminals is relatively limited
-	// additional terminal definitions can be included via side-effect import
-	// See https://github.com/gdamore/tcell/blob/master/terminfo/base/base.go
-	// See https://github.com/gdamore/tcell/issues/252#issuecomment-533836078
-	"github.com/gdamore/tcell/termbox"
-	_ "github.com/gdamore/tcell/terminfo/s/screen" // tmux on FreeBSD 11 & 12 without ncurses
-
-	"github.com/pkg/errors"
-	"github.com/spf13/pflag"
-	"github.com/zrepl/yaml-config"
-
-	"github.com/zrepl/zrepl/cli"
-	"github.com/zrepl/zrepl/daemon"
-	"github.com/zrepl/zrepl/daemon/job"
-	"github.com/zrepl/zrepl/daemon/pruner"
-	"github.com/zrepl/zrepl/daemon/snapper"
-	"github.com/zrepl/zrepl/replication/report"
-)
-
-type byteProgressMeasurement struct {
-	time time.Time
-	val  int64
-}
-
-type bytesProgressHistory struct {
-	last        *byteProgressMeasurement // pointer as poor man's optional
-	changeCount int
-	lastChange  time.Time
-	bpsAvg      float64
-}
-
-func (p *bytesProgressHistory) Update(currentVal int64) (bytesPerSecondAvg int64, changeCount int) {
-
-	if p.last == nil {
-		p.last = &byteProgressMeasurement{
-			time: time.Now(),
-			val:  currentVal,
-		}
-		return 0, 0
-	}
-
-	if p.last.val != currentVal {
-		p.changeCount++
-		p.lastChange = time.Now()
-	}
-
-	if time.Since(p.lastChange) > 3*time.Second {
-		p.last = nil
-		return 0, 0
-	}
-
-	deltaV := currentVal - p.last.val
-	deltaT := time.Since(p.last.time)
-	rate := float64(deltaV) / deltaT.Seconds()
-
-	factor := 0.3
-	p.bpsAvg = (1-factor)*p.bpsAvg + factor*rate
-
-	p.last.time = time.Now()
-	p.last.val = currentVal
-
-	return int64(p.bpsAvg), p.changeCount
-}
-
-type tui struct {
-	x, y   int
-	indent int
-
-	lock   sync.Mutex //For report and error
-	report map[string]*job.Status
-	err    error
-
-	jobFilter string
-
-	replicationProgress map[string]*bytesProgressHistory // by job name
-}
-
-func newTui() tui {
-	return tui{
-		replicationProgress: make(map[string]*bytesProgressHistory),
-	}
-}
-
-const INDENT_MULTIPLIER = 4
-
-func (t *tui) moveLine(dl int, col int) {
-	t.y += dl
-	t.x = t.indent*INDENT_MULTIPLIER + col
-}
-
-func (t *tui) write(text string) {
-	for _, c := range text {
-		if c == '\n' {
-			t.newline()
-			continue
-		}
-		termbox.SetCell(t.x, t.y, c, termbox.ColorDefault, termbox.ColorDefault)
-		t.x += 1
-	}
-}
-
-func (t *tui) printf(text string, a ...interface{}) {
-	t.write(fmt.Sprintf(text, a...))
-}
-
-func wrap(s string, width int) string {
-	var b strings.Builder
-	for len(s) > 0 {
-		rem := width
-		if rem > len(s) {
-			rem = len(s)
-		}
-		if idx := strings.IndexAny(s, "\n\r"); idx != -1 && idx < rem {
-			rem = idx + 1
-		}
-		untilNewline := strings.TrimRight(s[:rem], "\n\r")
-		s = s[rem:]
-		if len(untilNewline) == 0 {
-			continue
-		}
-		b.WriteString(untilNewline)
-		b.WriteString("\n")
-	}
-	return strings.TrimRight(b.String(), "\n\r")
-}
-
-func (t *tui) printfDrawIndentedAndWrappedIfMultiline(format string, a ...interface{}) {
-	whole := fmt.Sprintf(format, a...)
-	width, _ := termbox.Size()
-	if !strings.ContainsAny(whole, "\n\r") && t.x+len(whole) <= width {
-		t.printf(format, a...)
-	} else {
-		t.addIndent(1)
-		t.newline()
-		t.write(wrap(whole, width-INDENT_MULTIPLIER*t.indent))
-		t.addIndent(-1)
-	}
-}
-
-func (t *tui) newline() {
-	t.moveLine(1, 0)
-}
-
-func (t *tui) setIndent(indent int) {
-	t.indent = indent
-	t.moveLine(0, 0)
-}
-
-func (t *tui) addIndent(indent int) {
-	t.indent += indent
-	t.moveLine(0, 0)
-}
-
-var statusFlags struct {
-	Raw bool
-	Job string
-}
-
-var StatusCmd = &cli.Subcommand{
-	Use:   "status",
-	Short: "show job activity or dump as JSON for monitoring",
-	SetupFlags: func(f *pflag.FlagSet) {
-		f.BoolVar(&statusFlags.Raw, "raw", false, "dump raw status description from zrepl daemon")
-		f.StringVar(&statusFlags.Job, "job", "", "only dump specified job")
-	},
-	Run: runStatus,
-}
-
-func runStatus(ctx context.Context, s *cli.Subcommand, args []string) error {
-	httpc, err := controlHttpClient(s.Config().Global.Control.SockPath)
-	if err != nil {
-		return err
-	}
-
-	if statusFlags.Raw {
-		resp, err := httpc.Get("http://unix" + daemon.ControlJobEndpointStatus)
-		if err != nil {
-			return err
-		}
-		defer resp.Body.Close()
-		if resp.StatusCode != http.StatusOK {
-			fmt.Fprintf(os.Stderr, "Received error response:\n")
-			_, err := io.CopyN(os.Stderr, resp.Body, 4096)
-			if err != nil {
-				return err
-			}
-			return errors.Errorf("exit")
-		}
-		if _, err := io.Copy(os.Stdout, resp.Body); err != nil {
-			return err
-		}
-		return nil
-	}
-
-	t := newTui()
-	t.lock.Lock()
-	t.err = errors.New("Got no report yet")
-	t.lock.Unlock()
-	t.jobFilter = statusFlags.Job
-
-	err = termbox.Init()
-	if err != nil {
-		return err
-	}
-	defer termbox.Close()
-
-	update := func() {
-		var m daemon.Status
-
-		err2 := jsonRequestResponse(httpc, daemon.ControlJobEndpointStatus,
-			struct{}{},
-			&m,
-		)
-
-		t.lock.Lock()
-		t.err = err2
-		t.report = m.Jobs
-		t.lock.Unlock()
-		t.draw()
-	}
-	update()
-
-	ticker := time.NewTicker(500 * time.Millisecond)
-	defer ticker.Stop()
-	go func() {
-		for range ticker.C {
-			update()
-		}
-	}()
-
-	termbox.HideCursor()
-	termbox.Clear(termbox.ColorDefault, termbox.ColorDefault)
-
-loop:
-	for {
-		switch ev := termbox.PollEvent(); ev.Type {
-		case termbox.EventKey:
-			switch ev.Key {
-			case termbox.KeyEsc:
-				break loop
-			case termbox.KeyCtrlC:
-				break loop
-			}
-		case termbox.EventResize:
-			t.draw()
-		}
-	}
-
-	return nil
-
-}
-
-func (t *tui) getReplicationProgressHistory(jobName string) *bytesProgressHistory {
-	p, ok := t.replicationProgress[jobName]
-	if !ok {
-		p = &bytesProgressHistory{}
-		t.replicationProgress[jobName] = p
-	}
-	return p
-}
-
-func (t *tui) draw() {
-	t.lock.Lock()
-	defer t.lock.Unlock()
-
-	termbox.Clear(termbox.ColorDefault, termbox.ColorDefault)
-	t.x = 0
-	t.y = 0
-	t.indent = 0
-
-	if t.err != nil {
-		t.write(t.err.Error())
-	} else {
-		//Iterate over map in alphabetical order
-		keys := make([]string, 0, len(t.report))
-		for k := range t.report {
-			if len(k) == 0 || daemon.IsInternalJobName(k) { //Internal job
-				continue
-			}
-			if t.jobFilter != "" && k != t.jobFilter {
-				continue
-			}
-			keys = append(keys, k)
-		}
-		sort.Strings(keys)
-
-		if len(keys) == 0 {
-			t.setIndent(0)
-			t.printf("no jobs to display")
-			t.newline()
-			termbox.Flush()
-			return
-		}
-
-		for _, k := range keys {
-			v := t.report[k]
-
-			t.setIndent(0)
-
-			t.printf("Job: %s", k)
-			t.setIndent(1)
-			t.newline()
-			t.printf("Type: %s", v.Type)
-			t.setIndent(1)
-			t.newline()
-
-			if v.Type == job.TypePush || v.Type == job.TypePull {
-				activeStatus, ok := v.JobSpecific.(*job.ActiveSideStatus)
-				if !ok || activeStatus == nil {
-					t.printf("ActiveSideStatus is null")
-					t.newline()
-					continue
-				}
-
-				t.printf("Replication:")
-				t.newline()
-				t.addIndent(1)
-				t.renderReplicationReport(activeStatus.Replication, t.getReplicationProgressHistory(k))
-				t.addIndent(-1)
-
-				t.printf("Pruning Sender:")
-				t.newline()
-				t.addIndent(1)
-				t.renderPrunerReport(activeStatus.PruningSender)
-				t.addIndent(-1)
-
-				t.printf("Pruning Receiver:")
-				t.newline()
-				t.addIndent(1)
-				t.renderPrunerReport(activeStatus.PruningReceiver)
-				t.addIndent(-1)
-
-				if v.Type == job.TypePush {
-					t.printf("Snapshotting:")
-					t.newline()
-					t.addIndent(1)
-					t.renderSnapperReport(activeStatus.Snapshotting)
-					t.addIndent(-1)
-				}
-
-			} else if v.Type == job.TypeSnap {
-				snapStatus, ok := v.JobSpecific.(*job.SnapJobStatus)
-				if !ok || snapStatus == nil {
-					t.printf("SnapJobStatus is null")
-					t.newline()
-					continue
-				}
-				t.printf("Pruning snapshots:")
-				t.newline()
-				t.addIndent(1)
-				t.renderPrunerReport(snapStatus.Pruning)
-				t.addIndent(-1)
-				t.printf("Snapshotting:")
-				t.newline()
-				t.addIndent(1)
-				t.renderSnapperReport(snapStatus.Snapshotting)
-				t.addIndent(-1)
-			} else if v.Type == job.TypeSource {
-
-				st := v.JobSpecific.(*job.PassiveStatus)
-				t.printf("Snapshotting:\n")
-				t.addIndent(1)
-				t.renderSnapperReport(st.Snapper)
-				t.addIndent(-1)
-
-			} else {
-				t.printf("No status representation for job type '%s', dumping as YAML", v.Type)
-				t.newline()
-				asYaml, err := yaml.Marshal(v.JobSpecific)
-				if err != nil {
-					t.printf("Error marshaling status to YAML: %s", err)
-					t.newline()
-					continue
-				}
-				t.write(string(asYaml))
-				t.newline()
-				continue
-			}
-		}
-	}
-	termbox.Flush()
-}
-
-func (t *tui) renderReplicationReport(rep *report.Report, history *bytesProgressHistory) {
-	if rep == nil {
-		t.printf("...\n")
-		return
-	}
-
-	if rep.WaitReconnectError != nil {
-		t.printfDrawIndentedAndWrappedIfMultiline("Connectivity: %s", rep.WaitReconnectError)
-		t.newline()
-	}
-	if !rep.WaitReconnectSince.IsZero() {
-		delta := time.Until(rep.WaitReconnectUntil).Round(time.Second)
-		if rep.WaitReconnectUntil.IsZero() || delta > 0 {
-			var until string
-			if rep.WaitReconnectUntil.IsZero() {
-				until = "waiting indefinitely"
-			} else {
-				until = fmt.Sprintf("hard fail in %s @ %s", delta, rep.WaitReconnectUntil)
-			}
-			t.printfDrawIndentedAndWrappedIfMultiline("Connectivity: reconnecting with exponential backoff (since %s) (%s)",
-				rep.WaitReconnectSince, until)
-		} else {
-			t.printfDrawIndentedAndWrappedIfMultiline("Connectivity: reconnects reached hard-fail timeout @ %s", rep.WaitReconnectUntil)
-		}
-		t.newline()
-	}
-
-	// TODO visualize more than the latest attempt by folding all attempts into one
-	if len(rep.Attempts) == 0 {
-		t.printf("no attempts made yet")
-		return
-	} else {
-		t.printf("Attempt #%d", len(rep.Attempts))
-		if len(rep.Attempts) > 1 {
-			t.printf(". Previous attempts failed with the following statuses:")
-			t.newline()
-			t.addIndent(1)
-			for i, a := range rep.Attempts[:len(rep.Attempts)-1] {
-				t.printfDrawIndentedAndWrappedIfMultiline("#%d: %s (failed at %s) (ran %s)", i+1, a.State, a.FinishAt, a.FinishAt.Sub(a.StartAt))
-				t.newline()
-			}
-			t.addIndent(-1)
-		} else {
-			t.newline()
-		}
-	}
-
-	latest := rep.Attempts[len(rep.Attempts)-1]
-	sort.Slice(latest.Filesystems, func(i, j int) bool {
-		return latest.Filesystems[i].Info.Name < latest.Filesystems[j].Info.Name
-	})
-
-	t.printf("Status: %s", latest.State)
-	t.newline()
-	if latest.State == report.AttemptPlanningError {
-		t.printf("Problem: ")
-		t.printfDrawIndentedAndWrappedIfMultiline("%s", latest.PlanError)
-		t.newline()
-	} else if latest.State == report.AttemptFanOutError {
-		t.printf("Problem: one or more of the filesystems encountered errors")
-		t.newline()
-	}
-
-	if latest.State != report.AttemptPlanning && latest.State != report.AttemptPlanningError {
-		// Draw global progress bar
-		// Progress: [---------------]
-		expected, replicated, containsInvalidSizeEstimates := latest.BytesSum()
-		rate, changeCount := history.Update(replicated)
-		eta := time.Duration(0)
-		if rate > 0 {
-			eta = time.Duration((expected-replicated)/rate) * time.Second
-		}
-		t.write("Progress: ")
-		t.drawBar(50, replicated, expected, changeCount)
-		t.write(fmt.Sprintf(" %s / %s @ %s/s", ByteCountBinary(replicated), ByteCountBinary(expected), ByteCountBinary(rate)))
-		if eta != 0 {
-			t.write(fmt.Sprintf(" (%s remaining)", humanizeDuration(eta)))
-		}
-		t.newline()
-		if containsInvalidSizeEstimates {
-			t.write("NOTE: not all steps could be size-estimated, total estimate is likely imprecise!")
-			t.newline()
-		}
-
-		if len(latest.Filesystems) == 0 {
-			t.write("NOTE: no filesystems were considered for replication!")
-			t.newline()
-		}
-
-		var maxFSLen int
-		for _, fs := range latest.Filesystems {
-			if len(fs.Info.Name) > maxFSLen {
-				maxFSLen = len(fs.Info.Name)
-			}
-		}
-		for _, fs := range latest.Filesystems {
-			t.printFilesystemStatus(fs, false, maxFSLen) // FIXME bring 'active' flag back
-		}
-
-	}
-
-}
-
-func (t *tui) renderPrunerReport(r *pruner.Report) {
-	if r == nil {
-		t.printf("...\n")
-		return
-	}
-
-	state, err := pruner.StateString(r.State)
-	if err != nil {
-		t.printf("Status: %q (parse error: %q)\n", r.State, err)
-		return
-	}
-
-	t.printf("Status: %s", state)
-	t.newline()
-
-	if r.Error != "" {
-		t.printf("Error: %s\n", r.Error)
-	}
-
-	type commonFS struct {
-		*pruner.FSReport
-		completed bool
-	}
-	all := make([]commonFS, 0, len(r.Pending)+len(r.Completed))
-	for i := range r.Pending {
-		all = append(all, commonFS{&r.Pending[i], false})
-	}
-	for i := range r.Completed {
-		all = append(all, commonFS{&r.Completed[i], true})
-	}
-
-	switch state {
-	case pruner.Plan:
-		fallthrough
-	case pruner.PlanErr:
-		return
-	}
-
-	if len(all) == 0 {
-		t.printf("nothing to do\n")
-		return
-	}
-
-	var totalDestroyCount, completedDestroyCount int
-	var maxFSname int
-	for _, fs := range all {
-		totalDestroyCount += len(fs.DestroyList)
-		if fs.completed {
-			completedDestroyCount += len(fs.DestroyList)
-		}
-		if maxFSname < len(fs.Filesystem) {
-			maxFSname = len(fs.Filesystem)
-		}
-	}
-
-	// global progress bar
-	progress := int(math.Round(80 * float64(completedDestroyCount) / float64(totalDestroyCount)))
-	t.write("Progress: ")
-	t.write("[")
-	t.write(times("=", progress))
-	t.write(">")
-	t.write(times("-", 80-progress))
-	t.write("]")
-	t.printf(" %d/%d snapshots", completedDestroyCount, totalDestroyCount)
-	t.newline()
-
-	sort.SliceStable(all, func(i, j int) bool {
-		return strings.Compare(all[i].Filesystem, all[j].Filesystem) == -1
-	})
-
-	// Draw a table-like representation of 'all'
-	for _, fs := range all {
-		t.write(rightPad(fs.Filesystem, maxFSname, " "))
-		t.write(" ")
-		if !fs.SkipReason.NotSkipped() {
-			t.printf("skipped: %s\n", fs.SkipReason)
-			continue
-		}
-		if fs.LastError != "" {
-			if strings.ContainsAny(fs.LastError, "\r\n") {
-				t.printf("ERROR:")
-				t.printfDrawIndentedAndWrappedIfMultiline("%s\n", fs.LastError)
-			} else {
-				t.printfDrawIndentedAndWrappedIfMultiline("ERROR: %s\n", fs.LastError)
-			}
-			t.newline()
-			continue
-		}
-
-		pruneRuleActionStr := fmt.Sprintf("(destroy %d of %d snapshots)",
-			len(fs.DestroyList), len(fs.SnapshotList))
-
-		if fs.completed {
-			t.printf("Completed  %s\n", pruneRuleActionStr)
-			continue
-		}
-
-		t.write("Pending    ") // whitespace is padding 10
-		if len(fs.DestroyList) == 1 {
-			t.write(fs.DestroyList[0].Name)
-		} else {
-			t.write(pruneRuleActionStr)
-		}
-		t.newline()
-	}
-
-}
-
-func (t *tui) renderSnapperReport(r *snapper.Report) {
-	if r == nil {
-		t.printf("<snapshot type does not have a report>\n")
-		return
-	}
-
-	t.printf("Status: %s", r.State)
-	t.newline()
-
-	if r.Error != "" {
-		t.printf("Error: %s\n", r.Error)
-	}
-	if !r.SleepUntil.IsZero() {
-		t.printf("Sleep until: %s\n", r.SleepUntil)
-	}
-
-	sort.Slice(r.Progress, func(i, j int) bool {
-		return strings.Compare(r.Progress[i].Path, r.Progress[j].Path) == -1
-	})
-
-	t.addIndent(1)
-	defer t.addIndent(-1)
-	dur := func(d time.Duration) string {
-		return d.Round(100 * time.Millisecond).String()
-	}
-
-	type row struct {
-		path, state, duration, remainder, hookReport string
-	}
-	var widths struct {
-		path, state, duration int
-	}
-	rows := make([]*row, len(r.Progress))
-	for i, fs := range r.Progress {
-		r := &row{
-			path:  fs.Path,
-			state: fs.State.String(),
-		}
-		if fs.HooksHadError {
-			r.hookReport = fs.Hooks // FIXME render here, not in daemon
-		}
-		switch fs.State {
-		case snapper.SnapPending:
-			r.duration = "..."
-			r.remainder = ""
-		case snapper.SnapStarted:
-			r.duration = dur(time.Since(fs.StartAt))
-			r.remainder = fmt.Sprintf("snap name: %q", fs.SnapName)
-		case snapper.SnapDone:
-			fallthrough
-		case snapper.SnapError:
-			r.duration = dur(fs.DoneAt.Sub(fs.StartAt))
-			r.remainder = fmt.Sprintf("snap name: %q", fs.SnapName)
-		}
-		rows[i] = r
-		if len(r.path) > widths.path {
-			widths.path = len(r.path)
-		}
-		if len(r.state) > widths.state {
-			widths.state = len(r.state)
-		}
-		if len(r.duration) > widths.duration {
-			widths.duration = len(r.duration)
-		}
-	}
-
-	for _, r := range rows {
-		path := rightPad(r.path, widths.path, " ")
-		state := rightPad(r.state, widths.state, " ")
-		duration := rightPad(r.duration, widths.duration, " ")
-		t.printf("%s %s %s", path, state, duration)
-		t.printfDrawIndentedAndWrappedIfMultiline(" %s", r.remainder)
-		if r.hookReport != "" {
-			t.printfDrawIndentedAndWrappedIfMultiline("%s", r.hookReport)
-		}
-		t.newline()
-	}
-
-}
-
-func times(str string, n int) (out string) {
-	for i := 0; i < n; i++ {
-		out += str
-	}
-	return
-}
-
-func rightPad(str string, length int, pad string) string {
-	if len(str) > length {
-		return str[:length]
-	}
-	return str + strings.Repeat(pad, length-len(str))
-}
-
-var arrowPositions = `>\|/`
-
-// changeCount = 0 indicates stall / no progress
-func (t *tui) drawBar(length int, bytes, totalBytes int64, changeCount int) {
-	var completedLength int
-	if totalBytes > 0 {
-		completedLength = int(int64(length) * bytes / totalBytes)
-		if completedLength > length {
-			completedLength = length
-		}
-	} else if totalBytes == bytes {
-		completedLength = length
-	}
-
-	t.write("[")
-	t.write(times("=", completedLength))
-	t.write(string(arrowPositions[changeCount%len(arrowPositions)]))
-	t.write(times("-", length-completedLength))
-	t.write("]")
-}
-
-func (t *tui) printFilesystemStatus(rep *report.FilesystemReport, active bool, maxFS int) {
-
-	expected, replicated, containsInvalidSizeEstimates := rep.BytesSum()
-	sizeEstimationImpreciseNotice := ""
-	if containsInvalidSizeEstimates {
-		sizeEstimationImpreciseNotice = " (some steps lack size estimation)"
-	}
-	if rep.CurrentStep < len(rep.Steps) && rep.Steps[rep.CurrentStep].Info.BytesExpected == 0 {
-		sizeEstimationImpreciseNotice = " (step lacks size estimation)"
-	}
-
-	status := fmt.Sprintf("%s (step %d/%d, %s/%s)%s",
-		strings.ToUpper(string(rep.State)),
-		rep.CurrentStep, len(rep.Steps),
-		ByteCountBinary(replicated), ByteCountBinary(expected),
-		sizeEstimationImpreciseNotice,
-	)
-
-	activeIndicator := " "
-	if active {
-		activeIndicator = "*"
-	}
-	t.printf("%s %s %s ",
-		activeIndicator,
-		rightPad(rep.Info.Name, maxFS, " "),
-		status)
-
-	next := ""
-	if err := rep.Error(); err != nil {
-		next = err.Err
-	} else if rep.State != report.FilesystemDone {
-		if nextStep := rep.NextStep(); nextStep != nil {
-			if nextStep.IsIncremental() {
-				next = fmt.Sprintf("next: %s => %s", nextStep.Info.From, nextStep.Info.To)
-			} else {
-				next = fmt.Sprintf("next: full send %s", nextStep.Info.To)
-			}
-			attribs := []string{}
-
-			if nextStep.Info.Resumed {
-				attribs = append(attribs, "resumed")
-			}
-
-			attribs = append(attribs, fmt.Sprintf("encrypted=%s", nextStep.Info.Encrypted))
-
-			next += fmt.Sprintf(" (%s)", strings.Join(attribs, ", "))
-		} else {
-			next = "" // individual FSes may still be in planning state
-		}
-
-	}
-	t.printfDrawIndentedAndWrappedIfMultiline("%s", next)
-
-	t.newline()
-}
-
-func ByteCountBinary(b int64) string {
-	const unit = 1024
-	if b < unit {
-		return fmt.Sprintf("%d B", b)
-	}
-	div, exp := int64(unit), 0
-	for n := b / unit; n >= unit; n /= unit {
-		div *= unit
-		exp++
-	}
-	return fmt.Sprintf("%.1f %ciB", float64(b)/float64(div), "KMGTPE"[exp])
-}
-
-func humanizeDuration(duration time.Duration) string {
-	days := int64(duration.Hours() / 24)
-	hours := int64(math.Mod(duration.Hours(), 24))
-	minutes := int64(math.Mod(duration.Minutes(), 60))
-	seconds := int64(math.Mod(duration.Seconds(), 60))
-
-	var parts []string
-
-	force := false
-	chunks := []int64{days, hours, minutes, seconds}
-	for i, chunk := range chunks {
-		if force || chunk > 0 {
-			padding := 0
-			if force {
-				padding = 2
-			}
-			parts = append(parts, fmt.Sprintf("%*d%c", padding, chunk, "dhms"[i]))
-			force = true
-		}
-	}
-
-	return strings.Join(parts, " ")
-}

config/config_send_test.go

@@ -1,74 +0,0 @@
-package config
-
-import (
-	"fmt"
-	"testing"
-
-	"github.com/stretchr/testify/assert"
-)
-
-func TestSendOptions(t *testing.T) {
-	tmpl := `
-jobs:
-- name: foo
-  type: push
-  connect:
-    type: local
-    listener_name: foo
-    client_identity: bar
-  filesystems: {"<": true}
-  %s
-  snapshotting:
-    type: manual
-  pruning:
-    keep_sender:
-    - type: last_n
-      count: 10
-    keep_receiver:
-    - type: last_n
-      count: 10
-`
-	encrypted_false := `
-  send:
-    encrypted: false
-`
-
-	encrypted_true := `
-  send:
-    encrypted: true
-`
-
-	encrypted_unspecified := `
-  send: {}
-`
-
-	send_not_specified := `
-`
-
-	fill := func(s string) string { return fmt.Sprintf(tmpl, s) }
-	var c *Config
-
-	t.Run("encrypted_false", func(t *testing.T) {
-		c = testValidConfig(t, fill(encrypted_false))
-		encrypted := c.Jobs[0].Ret.(*PushJob).Send.Encrypted
-		assert.Equal(t, false, encrypted)
-	})
-	t.Run("encrypted_true", func(t *testing.T) {
-		c = testValidConfig(t, fill(encrypted_true))
-		encrypted := c.Jobs[0].Ret.(*PushJob).Send.Encrypted
-		assert.Equal(t, true, encrypted)
-	})
-
-	t.Run("encrypted_unspecified", func(t *testing.T) {
-		c = testValidConfig(t, fill(encrypted_unspecified))
-		encrypted := c.Jobs[0].Ret.(*PushJob).Send.Encrypted
-		assert.Equal(t, false, encrypted)
-	})
-
-	t.Run("send_not_specified", func(t *testing.T) {
-		c, err := testConfig(t, fill(send_not_specified))
-		assert.NoError(t, err)
-		assert.NotNil(t, c)
-	})
-
-}

config/config_snapshotting_test.go

@@ -1,90 +0,0 @@
-package config
-
-import (
-	"fmt"
-	"testing"
-	"time"
-
-	"github.com/stretchr/testify/assert"
-)
-
-func TestSnapshotting(t *testing.T) {
-	tmpl := `
-jobs:
-- name: foo
-  type: push
-  connect:
-    type: local
-    listener_name: foo
-    client_identity: bar
-  filesystems: {"<": true}
-  %s
-  pruning:
-    keep_sender:
-    - type: last_n
-      count: 10
-    keep_receiver:
-    - type: last_n
-      count: 10
-`
-	manual := `
-  snapshotting:
-    type: manual
-`
-	periodic := `
-  snapshotting:
-    type: periodic
-    prefix: zrepl_
-    interval: 10m
-`
-
-	hooks := `
-  snapshotting:
-    type: periodic
-    prefix: zrepl_
-    interval: 10m
-    hooks:
-    - type: command
-      path: /tmp/path/to/command
-    - type: command
-      path: /tmp/path/to/command
-      filesystems: { "zroot<": true, "<": false }
-    - type: postgres-checkpoint
-      dsn: "host=localhost port=5432 user=postgres sslmode=disable"
-      filesystems: {
-          "tank/postgres/data11": true
-      }
-    - type: mysql-lock-tables
-      dsn: "root@tcp(localhost)/"
-      filesystems: {
-        "tank/mysql": true
-      }
-`
-
-	fillSnapshotting := func(s string) string { return fmt.Sprintf(tmpl, s) }
-	var c *Config
-
-	t.Run("manual", func(t *testing.T) {
-		c = testValidConfig(t, fillSnapshotting(manual))
-		snm := c.Jobs[0].Ret.(*PushJob).Snapshotting.Ret.(*SnapshottingManual)
-		assert.Equal(t, "manual", snm.Type)
-	})
-
-	t.Run("periodic", func(t *testing.T) {
-		c = testValidConfig(t, fillSnapshotting(periodic))
-		snp := c.Jobs[0].Ret.(*PushJob).Snapshotting.Ret.(*SnapshottingPeriodic)
-		assert.Equal(t, "periodic", snp.Type)
-		assert.Equal(t, 10*time.Minute, snp.Interval)
-		assert.Equal(t, "zrepl_", snp.Prefix)
-	})
-
-	t.Run("hooks", func(t *testing.T) {
-		c = testValidConfig(t, fillSnapshotting(hooks))
-		hs := c.Jobs[0].Ret.(*PushJob).Snapshotting.Ret.(*SnapshottingPeriodic).Hooks
-		assert.Equal(t, hs[0].Ret.(*HookCommand).Filesystems["<"], true)
-		assert.Equal(t, hs[1].Ret.(*HookCommand).Filesystems["zroot<"], true)
-		assert.Equal(t, hs[2].Ret.(*HookPostgresCheckpoint).Filesystems["tank/postgres/data11"], true)
-		assert.Equal(t, hs[3].Ret.(*HookMySQLLockTables).Filesystems["tank/mysql"], true)
-	})
-
-}

config/config_test.go

@@ -1,88 +0,0 @@
-package config
-
-import (
-	"bufio"
-	"bytes"
-	"fmt"
-	"path"
-	"path/filepath"
-	"strings"
-	"testing"
-	"text/template"
-
-	"github.com/kr/pretty"
-	"github.com/stretchr/testify/assert"
-	"github.com/stretchr/testify/require"
-)
-
-func TestSampleConfigsAreParsedWithoutErrors(t *testing.T) {
-	paths, err := filepath.Glob("./samples/*")
-	if err != nil {
-		t.Errorf("glob failed: %+v", err)
-	}
-
-	for _, p := range paths {
-
-		if path.Ext(p) != ".yml" {
-			t.Logf("skipping file %s", p)
-			continue
-		}
-
-		t.Run(p, func(t *testing.T) {
-			c, err := ParseConfig(p)
-			if err != nil {
-				t.Errorf("error parsing %s:\n%+v", p, err)
-			}
-
-			t.Logf("file: %s", p)
-			t.Log(pretty.Sprint(c))
-		})
-
-	}
-
-}
-
-// template must be a template/text template with a single '{{ . }}' as placeholder for val
-//nolint[:deadcode,unused]
-func testValidConfigTemplate(t *testing.T, tmpl string, val string) *Config {
-	tmp, err := template.New("master").Parse(tmpl)
-	if err != nil {
-		panic(err)
-	}
-	var buf bytes.Buffer
-	err = tmp.Execute(&buf, val)
-	if err != nil {
-		panic(err)
-	}
-	return testValidConfig(t, buf.String())
-}
-
-func testValidConfig(t *testing.T, input string) *Config {
-	t.Helper()
-	conf, err := testConfig(t, input)
-	require.NoError(t, err)
-	require.NotNil(t, conf)
-	return conf
-}
-
-func testConfig(t *testing.T, input string) (*Config, error) {
-	t.Helper()
-	return ParseConfigBytes([]byte(input))
-}
-
-func trimSpaceEachLineAndPad(s, pad string) string {
-	var out strings.Builder
-	scan := bufio.NewScanner(strings.NewReader(s))
-	for scan.Scan() {
-		fmt.Fprintf(&out, "%s%s\n", pad, bytes.TrimSpace(scan.Bytes()))
-	}
-	return out.String()
-}
-
-func TestTrimSpaceEachLineAndPad(t *testing.T) {
-	foo := `
-	foo
-	bar baz 
-	`
-	assert.Equal(t, "  \n  foo\n  bar baz\n  \n", trimSpaceEachLineAndPad(foo, "  "))
-}

daemon/job/build_jobs_sendrecvoptions.go

@@ -1,56 +0,0 @@
-package job
-
-import (
-	"github.com/pkg/errors"
-
-	"github.com/zrepl/zrepl/config"
-	"github.com/zrepl/zrepl/daemon/filters"
-	"github.com/zrepl/zrepl/endpoint"
-	"github.com/zrepl/zrepl/zfs"
-)
-
-type SendingJobConfig interface {
-	GetFilesystems() config.FilesystemsFilter
-	GetSendOptions() *config.SendOptions // must not be nil
-}
-
-func buildSenderConfig(in SendingJobConfig, jobID endpoint.JobID) (*endpoint.SenderConfig, error) {
-
-	fsf, err := filters.DatasetMapFilterFromConfig(in.GetFilesystems())
-	if err != nil {
-		return nil, errors.Wrap(err, "cannot build filesystem filter")
-	}
-
-	return &endpoint.SenderConfig{
-		FSF:     fsf,
-		Encrypt: &zfs.NilBool{B: in.GetSendOptions().Encrypted},
-		JobID:   jobID,
-	}, nil
-}
-
-type ReceivingJobConfig interface {
-	GetRootFS() string
-	GetAppendClientIdentity() bool
-	GetRecvOptions() *config.RecvOptions
-}
-
-func buildReceiverConfig(in ReceivingJobConfig, jobID endpoint.JobID) (rc endpoint.ReceiverConfig, err error) {
-	rootFs, err := zfs.NewDatasetPath(in.GetRootFS())
-	if err != nil {
-		return rc, errors.New("root_fs is not a valid zfs filesystem path")
-	}
-	if rootFs.Length() <= 0 {
-		return rc, errors.New("root_fs must not be empty") // duplicates error check of receiver
-	}
-
-	rc = endpoint.ReceiverConfig{
-		JobID:                      jobID,
-		RootWithoutClientComponent: rootFs,
-		AppendClientIdentity:       in.GetAppendClientIdentity(),
-	}
-	if err := rc.Validate(); err != nil {
-		return rc, errors.Wrap(err, "cannot build receiver config")
-	}
-
-	return rc, nil
-}

daemon/job/build_jobs_test.go

@@ -1,146 +0,0 @@
-package job
-
-import (
-	"fmt"
-	"path"
-	"path/filepath"
-	"testing"
-
-	"github.com/kr/pretty"
-	"github.com/stretchr/testify/assert"
-	"github.com/stretchr/testify/require"
-
-	"github.com/zrepl/zrepl/config"
-	"github.com/zrepl/zrepl/transport/tls"
-)
-
-func TestValidateReceivingSidesDoNotOverlap(t *testing.T) {
-	type testCase struct {
-		err   bool
-		input []string
-	}
-	tcs := []testCase{
-		{false, nil},
-		{false, []string{}},
-		{false, []string{""}}, // not our job to determine valid paths
-		{false, []string{"a"}},
-		{false, []string{"some/path"}},
-		{false, []string{"zroot/sink1", "zroot/sink2", "zroot/sink3"}},
-		{false, []string{"zroot/foo", "zroot/foobar"}},
-		{true, []string{"zroot/b", "zroot/b"}},
-		{true, []string{"zroot/foo", "zroot/foo/bar", "zroot/baz"}},
-		{false, []string{"a/x", "b/x"}},
-		{false, []string{"a", "b"}},
-		{true, []string{"a", "a"}},
-		{true, []string{"a/x/y", "a/x"}},
-		{true, []string{"a/x", "a/x/y"}},
-		{true, []string{"a/x", "b/x", "a/x/y"}},
-		{true, []string{"a", "a/b", "a/c", "a/b"}},
-		{true, []string{"a/b", "a/c", "a/b", "a/d", "a/c"}},
-	}
-
-	for _, tc := range tcs {
-		t.Logf("input: %v", tc.input)
-		err := validateReceivingSidesDoNotOverlap(tc.input)
-		if tc.err {
-			assert.Error(t, err)
-		} else {
-			assert.NoError(t, err)
-		}
-	}
-}
-
-func TestJobIDErrorHandling(t *testing.T) {
-	tmpl := `
-jobs:
-- name: %s
-  type: push
-  connect:
-    type: local
-    listener_name: foo
-    client_identity: bar
-  filesystems: {"<": true}
-  snapshotting:
-    type: manual
-  pruning:
-    keep_sender:
-    - type: last_n
-      count: 10
-    keep_receiver:
-    - type: last_n
-      count: 10
-`
-	fill := func(s string) string { return fmt.Sprintf(tmpl, s) }
-
-	type Case struct {
-		jobName string
-		valid   bool
-	}
-	cases := []Case{
-		{"validjobname", true},
-		{"valid with spaces", true},
-		{"invalid\twith\ttabs", false},
-		{"invalid#withdelimiter", false},
-		{"invalid@withdelimiter", false},
-		{"withnewline\\nmiddle", false},
-		{"withnewline\\n", false},
-		{"withslash/", false},
-		{"withslash/inthemiddle", false},
-		{"/", false},
-	}
-
-	for i := range cases {
-		t.Run(cases[i].jobName, func(t *testing.T) {
-			c := cases[i]
-
-			conf, err := config.ParseConfigBytes([]byte(fill(c.jobName)))
-			require.NoError(t, err, "not expecting yaml-config to know about job ids")
-			require.NotNil(t, conf)
-			jobs, err := JobsFromConfig(conf)
-
-			if c.valid {
-				assert.NoError(t, err)
-				require.Len(t, jobs, 1)
-				assert.Equal(t, c.jobName, jobs[0].Name())
-			} else {
-				t.Logf("error: %s", err)
-				assert.Error(t, err)
-				assert.Nil(t, jobs)
-			}
-
-		})
-	}
-
-}
-
-func TestSampleConfigsAreBuiltWithoutErrors(t *testing.T) {
-	paths, err := filepath.Glob("../../config/samples/*")
-	if err != nil {
-		t.Errorf("glob failed: %+v", err)
-	}
-
-	for _, p := range paths {
-
-		if path.Ext(p) != ".yml" {
-			t.Logf("skipping file %s", p)
-			continue
-		}
-
-		t.Run(p, func(t *testing.T) {
-			c, err := config.ParseConfig(p)
-			if err != nil {
-				t.Errorf("error parsing %s:\n%+v", p, err)
-			}
-
-			t.Logf("file: %s", p)
-			t.Log(pretty.Sprint(c))
-
-			tls.FakeCertificateLoading(t)
-			jobs, err := JobsFromConfig(c)
-			t.Logf("jobs: %#v", jobs)
-			assert.NoError(t, err)
-		})
-
-	}
-
-}

daemon/logging/trace/trace_convenience_test.go

@@ -1,16 +0,0 @@
-package trace
-
-import (
-	"testing"
-
-	"github.com/stretchr/testify/assert"
-)
-
-func TestGetCallerOrPanic(t *testing.T) {
-	withStackFromCtxMock := func() string {
-		return getMyCallerOrPanic()
-	}
-	ret := withStackFromCtxMock()
-	// zrepl prefix is stripped
-	assert.Equal(t, "daemon/logging/trace.TestGetCallerOrPanic", ret)
-}

daemon/snapper/snapper_all.go

@@ -1,48 +0,0 @@
-package snapper
-
-import (
-	"context"
-	"fmt"
-
-	"github.com/zrepl/zrepl/config"
-	"github.com/zrepl/zrepl/zfs"
-)
-
-// FIXME: properly abstract snapshotting:
-//   - split up things that trigger snapshotting from the mechanism
-//     - timer-based trigger (periodic)
-//     - call from control socket (manual)
-//     - mixed modes?
-//   - support a `zrepl snapshot JOBNAME` subcommand for config.SnapshottingManual
-type PeriodicOrManual struct {
-	s *Snapper
-}
-
-func (s *PeriodicOrManual) Run(ctx context.Context, wakeUpCommon chan<- struct{}) {
-	if s.s != nil {
-		s.s.Run(ctx, wakeUpCommon)
-	}
-}
-
-// Returns nil if manual
-func (s *PeriodicOrManual) Report() *Report {
-	if s.s != nil {
-		return s.s.Report()
-	}
-	return nil
-}
-
-func FromConfig(g *config.Global, fsf zfs.DatasetFilter, in config.SnapshottingEnum) (*PeriodicOrManual, error) {
-	switch v := in.Ret.(type) {
-	case *config.SnapshottingPeriodic:
-		snapper, err := PeriodicFromConfig(g, fsf, v)
-		if err != nil {
-			return nil, err
-		}
-		return &PeriodicOrManual{snapper}, nil
-	case *config.SnapshottingManual:
-		return &PeriodicOrManual{}, nil
-	default:
-		return nil, fmt.Errorf("unknown snapshotting type %T", v)
-	}
-}

daemon/snapper/snapper_report.go

@@ -1,118 +0,0 @@
-package snapper
-
-import (
-	"fmt"
-	"sort"
-	"strings"
-	"time"
-
-	"github.com/zrepl/zrepl/daemon/hooks"
-)
-
-type Report struct {
-	State State
-	// valid in state SyncUp and Waiting
-	SleepUntil time.Time
-	// valid in state Err
-	Error string
-	// valid in state Snapshotting
-	Progress []*ReportFilesystem
-}
-
-type ReportFilesystem struct {
-	Path  string
-	State SnapState
-
-	// Valid in SnapStarted and later
-	SnapName      string
-	StartAt       time.Time
-	Hooks         string
-	HooksHadError bool
-
-	// Valid in SnapDone | SnapError
-	DoneAt time.Time
-}
-
-func errOrEmptyString(e error) string {
-	if e != nil {
-		return e.Error()
-	}
-	return ""
-}
-
-func (s *Snapper) Report() *Report {
-	s.mtx.Lock()
-	defer s.mtx.Unlock()
-
-	pReps := make([]*ReportFilesystem, 0, len(s.plan))
-	for fs, p := range s.plan {
-		var hooksStr string
-		var hooksHadError bool
-		if p.hookPlan != nil {
-			hr := p.hookPlan.Report()
-			// FIXME: technically this belongs into client
-			// but we can't serialize hooks.Step ATM
-			rightPad := func(str string, length int, pad string) string {
-				if len(str) > length {
-					return str[:length]
-				}
-				return str + strings.Repeat(pad, length-len(str))
-			}
-			hooksHadError = hr.HadError()
-			rows := make([][]string, len(hr))
-			const numCols = 4
-			lens := make([]int, numCols)
-			for i, e := range hr {
-				rows[i] = make([]string, numCols)
-				rows[i][0] = fmt.Sprintf("%d", i+1)
-				rows[i][1] = e.Status.String()
-				runTime := "..."
-				if e.Status != hooks.StepPending {
-					runTime = e.End.Sub(e.Begin).Round(time.Millisecond).String()
-				}
-				rows[i][2] = runTime
-				rows[i][3] = ""
-				if e.Report != nil {
-					rows[i][3] = e.Report.String()
-				}
-				for j, col := range lens {
-					if len(rows[i][j]) > col {
-						lens[j] = len(rows[i][j])
-					}
-				}
-			}
-			rowsFlat := make([]string, len(hr))
-			for i, r := range rows {
-				colsPadded := make([]string, len(r))
-				for j, c := range r[:len(r)-1] {
-					colsPadded[j] = rightPad(c, lens[j], " ")
-				}
-				colsPadded[len(r)-1] = r[len(r)-1]
-				rowsFlat[i] = strings.Join(colsPadded, " ")
-			}
-			hooksStr = strings.Join(rowsFlat, "\n")
-		}
-		pReps = append(pReps, &ReportFilesystem{
-			Path:          fs.ToString(),
-			State:         p.state,
-			SnapName:      p.name,
-			StartAt:       p.startAt,
-			DoneAt:        p.doneAt,
-			Hooks:         hooksStr,
-			HooksHadError: hooksHadError,
-		})
-	}
-
-	sort.Slice(pReps, func(i, j int) bool {
-		return strings.Compare(pReps[i].Path, pReps[j].Path) == -1
-	})
-
-	r := &Report{
-		State:      s.state,
-		SleepUntil: s.sleepUntil,
-		Error:      errOrEmptyString(s.err),
-		Progress:   pReps,
-	}
-
-	return r
-}

dist/openrc/zrepl

@@ -0,0 +1,23 @@
+#!/sbin/openrc-run
+
+command='/usr/local/bin/zrepl'
+command_args='daemon'
+command_background='true'
+pidfile="/run/${RC_SVCNAME}.pid"
+output_log="/var/log/${RC_SVCNAME}.log"
+error_log="/var/log/${RC_SVCNAME}.log"
+
+zrepl_runtime_dir='/var/run/zrepl'
+
+start() {
+	mkdir -p "$zrepl_runtime_dir/stdinserver"
+	chmod -R 0700 "$zrepl_runtime_dir"
+	default_start
+}
+
+stop() {
+	rm -rf "$zrepl_runtime_dir"
+	default_stop
+}
+
+# vi: noet sw=8 sts=0

dist/systemd/zrepl.service

@@ -9,25 +9,8 @@ ExecStart=/usr/local/bin/zrepl --config /etc/zrepl/zrepl.yml daemon
 RuntimeDirectory=zrepl zrepl/stdinserver
 RuntimeDirectoryMode=0700
 
-ProtectSystem=strict
-#PrivateDevices=yes # TODO ZFS needs access to /dev/zfs, could we limit this?
-ProtectKernelTunables=yes
-ProtectControlGroups=yes
-PrivateTmp=yes
-#PrivateUsers=yes # TODO Does not work, why?
-ProtectKernelModules=true
-RestrictAddressFamilies=AF_UNIX AF_INET AF_INET6
-RestrictNamespaces=true
-RestrictRealtime=yes
-SystemCallArchitectures=native
-
-ProtectHome=read-only
-# ProtectHome=tmpfs totally possible, not by default though because of Debian stretch
-
-# SystemCallFilter
-#   ~@privileged doesn't work with Ubuntu 18.04 ssh
-SystemCallFilter=~ @mount @cpu-emulation @keyring @module @obsolete @raw-io @debug @clock @resources
-
+# Make Go produce coredumps
+Environment=GOTRACEBACK='crash'
 
 [Install]
 WantedBy=multi-user.target

docs/Makefile

@@ -10,11 +10,11 @@ BUILDDIR      = _build
 
 # Put it first so that "make" without argument is like "make help".
 help:
-	@$(SPHINXBUILD) -M help "$(SOURCEDIR)" "$(BUILDDIR)" -c sphinxconf $(SPHINXOPTS) $(O)
+	@$(SPHINXBUILD) -M help "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
 
 .PHONY: help Makefile
 
 # Catch-all target: route all unknown targets to Sphinx using the new
 # "make mode" option.  $(O) is meant as a shortcut for $(SPHINXOPTS).
 %: Makefile
-	@$(SPHINXBUILD) -M $@ "$(SOURCEDIR)" "$(BUILDDIR)" -c sphinxconf $(SPHINXOPTS) $(O)
+	@$(SPHINXBUILD) -M $@ "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)

docs/_static/banner.css

@@ -0,0 +1,43 @@
+/* https://github.com/sphinx-contrib/sphinxcontrib-versioning/blob/0b56210959c6b21bbb730072e81876491b4e1371/sphinxcontrib/versioning/_static/banner.css */
+
+.scv-banner {
+    padding: 3px;
+    border-radius: 2px;
+    font-size: 80%;
+    text-align: center;
+    color: white;
+    background: #d40 linear-gradient(-45deg,
+        rgba(255, 255, 255, 0.2) 0%,
+        rgba(255, 255, 255, 0.2) 25%,
+        transparent 25%,
+        transparent 50%,
+        rgba(255, 255, 255, 0.2) 50%,
+        rgba(255, 255, 255, 0.2) 75%,
+        transparent 75%,
+        transparent
+    );
+    background-size: 28px 28px;
+}
+.scv-banner > a {
+    color: white;
+}
+
+
+.scv-sphinx_rtd_theme {
+    background-color: #2980B9;
+}
+
+
+.scv-bizstyle {
+    background-color: #336699;
+}
+
+
+.scv-classic {
+    text-align: center !important;
+}
+
+
+.scv-traditional {
+    text-align: center !important;
+}

docs/_templates/page.html

@@ -0,0 +1,17 @@
+{% extends "!page.html" %}
+{% block body %}
+{% if current_version and latest_version and current_version != latest_version %}
+<p class="scv-banner scv-sphinx_rtd_theme">
+  <strong>
+    {% if current_version.is_released %}
+    You're reading an old version of this documentation.
+    If you want up-to-date information, please have a look at <a href="{{ vpathto(latest_version.name) }}">{{latest_version.name}}</a>.
+    {% else %}
+    You're reading the documentation for a development version.
+    For the latest released version, please have a look at <a href="{{ vpathto(latest_version.name) }}">{{latest_version.name}}</a>.
+    {% endif %}
+  </strong>
+</p>
+{% endif %}
+{{ super() }}
+{% endblock %}%

docs/_templates/versions.html

@@ -0,0 +1,27 @@
+{%- if current_version %}
+<div class="rst-versions" data-toggle="rst-versions" role="note" aria-label="versions">
+  <span class="rst-current-version" data-toggle="rst-current-version">
+    <span class="fa fa-book"> Other Versions</span>
+    v: {{ current_version.name }}
+    <span class="fa fa-caret-down"></span>
+  </span>
+  <div class="rst-other-versions">
+    {%- if versions.tags %}
+    <dl>
+      <dt>Tags</dt>
+      {%- for item in versions.tags %}
+      <dd><a href="{{ item.url }}">{{ item.name }}</a></dd>
+      {%- endfor %}
+    </dl>
+    {%- endif %}
+    {%- if versions.branches %}
+    <dl>
+      <dt>Branches</dt>
+      {%- for item in versions.branches %}
+      <dd><a href="{{ item.url }}">{{ item.name }}</a></dd>
+      {%- endfor %}
+    </dl>
+    {%- endif %}
+  </div>
+</div>
+{%- endif %}

docs/changelog.rst

@@ -6,6 +6,7 @@
 .. |docs| replace:: [DOCS]
 .. |feature| replace:: [FEATURE]
 .. |mig| replace:: **[MIGRATION]**
+.. |maint| replace:: [MAINT]
 
 .. _changelog:
 
@@ -15,17 +16,155 @@ Changelog
 The changelog summarizes bugfixes that are deemed relevant for users and package maintainers.
 Developers should consult the git commit log or GitHub issue tracker.
 
-We use the following annotations for classifying changes:
+Next Release
+------------
 
-* |break_config| Change that breaks the config.
-  As a package maintainer, make sure to warn your users about config breakage somehow.
-* |break| Change that breaks interoperability or persistent state representation with previous releases.
-  As a package maintainer, make sure to warn your users about config breakage somehow.
-  Note that even updating the package on both sides might not be sufficient, e.g. if persistent state needs to be migrated to a new format.
-* |mig| Migration that must be run by the user.
-* |feature| Change that introduces new functionality.
-* |bugfix| Change that fixes a bug, no regressions or incompatibilities expected.
-* |docs| Change to the documentation.
+The plan for the next release is to revisit how zrepl does snapshot management.
+High-level goals:
+
+- Make it easy to decouple snapshot management (snapshotting, pruning) from replication.
+- Ability to include/exclude snapshots from replication.
+  This is useful for aforementioned decoupling, e.g., separate snapshot prefixes for local & remote replication.
+  Also, it makes explicit that by default, zrepl replicates all snapshots, and that
+  replication has no concept of "zrepl-created snapshots", which is a common misconception.
+- Use of ``zfs snapshot`` comma syntax or channel programs to take snapshots of multiple
+  datasets atomically.
+- Provide an alternative to the ``grid`` pruning policy.
+  Most likely something based on hourly/daily/weekly/monthly "trains" plus a count.
+- Ability to prune at the granularity of the **group** of snapshots created at a given
+  time, as opposed to the individual snapshots within a dataset.
+  Maybe this will be addressed by the alternative to the ``grid`` pruning policy,
+  as it will likely be more predictable.
+
+Those changes will likely come with some breakage in the config.
+However, I want to avoid breaking **use cases** that are satisfied by the current design.
+There will be beta/RC releases to give users a chance to evaluate.
+
+0.7.0 (unreleased)
+------------------
+
+INCOMPLETE LIST OF CHANGES
+
+* |maint| Update to Go 1.23, require Go 1.22. Adopt `go.mod` toolchain aka `GOTOOLCHAIN` env var.
+* |maint| Fix deprecations exposed by the toolchain update.
+* |maint| Long-overdue update of all our dependencies & address deprecations.
+* |maint| The `make release-docker` in CircleCI produces executables that are bit-identical to my personal machine.
+
+0.6.1
+-----
+
+* |feature| add metric to detect filesystems rules that don't match any local dataset (thanks, `@gmekicaxcient <https://github.com/gmekicaxcient>`_).
+* |bugfix| ``zrepl status``: hide progress bar once all filesystems reach terminal state (thanks, `@0x3333 <https://github.com/0x3333>`_).
+* |bugfix| handling of tenative cursor presence if protection strategy doesn't use it (:issue:`714`).
+* |docs| address setup with two or more external disks (thanks, `@se-jaeger <https://github.com/se-jaeger>`_).
+* |docs| document ``replication`` and ``conflict_resolution`` options (thanks, `@InsanePrawn <https://github.com/InsanePrawn>`_).
+* |docs| docs: talks: add note on keep_bookmarks option (thanks, `@skirmess <https://github.com/skirmess>`_).
+* |maint| dist: add openrc service file (thanks, `@gramosg <https://github.com/gramosg>`_).
+* |maint| grafana: update dashboard to Grafana 9.3.6.
+* |maint| run platform tests as part of CI.
+* |maint| build: upgrade to Go 1.21 and update golangci-lint; minimum Go version for builds is now 1.20
+
+.. NOTE::
+  |  zrepl is a spare-time project primarily developed by `Christian Schwarz <https://cschwarz.com>`_.
+  |  You can support maintenance and feature development through one of the following services:
+  |  |Donate via Patreon| |Donate via GitHub Sponsors| |Donate via Liberapay| |Donate via PayPal|
+  |  Note that PayPal processing fees are relatively high for small donations.
+  |  For SEPA wire transfer and **commercial support**, please `contact Christian directly <https://cschwarz.com>`_.
+
+0.6
+---
+
+* |feature| :ref:`Schedule-based snapshotting<job-snapshotting--cron>` using ``cron`` syntax instead of an interval.
+* |feature| Configurable initial replication policy.
+  When a filesystem is first replicated to a receiver, this control whether just the newest
+  snapshot will be replicated vs. all existing snapshots. Learn more :ref:`in the docs <conflict_resolution-initial_replication>`.
+* |feature| Configurable timestamp format for snapshot names via :ref:`timestamp_format<job-snapshotting-timestamp_format>`
+  (Thanks, `@ydylla <https://github.com/ydylla>`_).
+* |feature| Add ``ZREPL_DESTROY_MAX_BATCH_SIZE`` env var (default 0=unlimited)
+  (Thanks, `@3nprob <https://github.com/3nprob>`_).
+* |feature| Add ``zrepl configcheck --skip-cert-check`` flag (Thanks, `@cole-h <https://github.com/cole-h>`_).
+* |bugfix| Fix resuming from interrupted replications that use ``send.raw`` on unencrypted datasets.
+
+  * The send options introduced in zrepl 0.4 allow users to specify additional zfs send flags for zrepl to use.
+    Before this fix, when setting ``send.raw=true`` on a job that replicates unencrypted datasets,
+    zrepl would not allow an interrupted replication to resume.
+    The reason were overly cautious checks to support the ``send.encrypted`` option.
+  * This bugfix removes these checks from the replication planner.
+    This makes ``send.encrypted`` a sender-side-only concern, much like all other ``send.*`` flags.
+  * However, this means that the ``zrepl status`` UI no longer indicates whether a replication step uses encrypted sends or not.
+    The setting is still effective though.
+
+* |break| convert Prometheus metric ``zrepl_version_daemon`` to ``zrepl_start_time`` metric
+
+  * The metric still reports the zrepl version in a label.
+    But the metric *value* is now the Unix timestamp at the time the daemon was started.
+    The Grafana dashboard in :repomasterlink:`dist/grafana` has been updated.
+
+* |bugfix| transient zrepl status error: ``Post "http://unix/status": EOF``
+* |bugfix| don't treat receive-side bookmarks as a replication conflict.
+  This facilitates chaining of replication jobs. See :issue:`490`.
+* |bugfix| workaround for Go/gRPC problem on Illumos where zrepl would
+  crash when using the ``local`` transport type (:issue:`598`).
+* |bugfix| fix active child tasks panic that cold occur during replication plannig (:issue:`193abbe`)
+* |bugfix| ``zrepl status`` off-by-one error in display of completed step count (:commit:`ce6701f`)
+* |bugfix| Allow using day & week units for ``snapshotting.interval`` (:commit:`ffb1d89`)
+* |docs| ``docs/overview`` improvements (Thanks, `@jtagcat <https://github.com/jtagcat>`_).
+* |maint| Update to Go 1.19.
+
+0.5
+---
+
+* |feature| :ref:`Bandwidth limiting <job-send-recv-options--bandwidth-limit>` (Thanks, Prominic.NET, Inc.)
+* |feature| zrepl status: use a ``*`` to indicate which filesystem is currently replicating
+* |feature| include daemon environment variables in zrepl status (currently only in ``--raw``)
+* |bugfix| **fix encrypt-on-receive + placeholders use case** (:issue:`504`)
+
+  * Before this fix, **plain sends** to a receiver with an encrypted ``root_fs`` **could be received unencrypted** if zrepl needed to create placeholders on the receiver.
+  * Existing zrepl users should :ref:`read the docs <job-recv-options--placeholder>` and check ``zfs get -r encryption,zrepl:placeholder PATH_TO_ROOTFS`` on the receiver.
+  * Thanks to `@mologie <https://github.com/mologie>`_ and `@razielgn <https://github.com/razielgn>`_ for reporting and testing!
+
+* |bugfix| Rename mis-spelled :ref:`send option <job-send-options>` ``embbeded_data`` to ``embedded_data``.
+* |bugfix| zrepl status: replication step numbers should start at 1
+* |bugfix| incorrect bandwidth averaging in ``zrepl status``.
+* |bugfix| FreeBSD with OpenZFS 2.0: zrepl would wait indefinitely for zfs send to exit on timeouts.
+* |bugfix| fix ``strconv.ParseInt: value out of range`` bug (and use the control RPCs).
+* |docs| improve description of multiple pruning rules.
+* |docs| document :ref:`platform tests <usage-platform-tests>`.
+* |docs| quickstart: make users aware that prune rules apply to all snapshots.
+* |maint| some platformtests were broken.
+* |maint| FreeBSD: release armv7 and arm64 binaries.
+* |maint| apt repo: update instructions due to ``apt-key`` deprecation.
+
+Note to all users: please read up on the following OpenZFS bugs, as you might be affected:
+
+* `ZFS send/recv with ashift 9->12 leads to data corruption <https://github.com/openzfs/zfs/issues/12762>`_.
+* Various bugs with encrypted send/recv (`Leadership meeting notes <https://openzfs.topicbox.com/groups/developer/T24bdaa2886c6cbf5-Mc039a11c3f1507ea0664817b/december-openzfs-leadership-meeting>`_)
+
+Finally, I'd like to point you to the `GitHub discussion <https://github.com/zrepl/zrepl/discussions/547>`_ about which bugfixes and features should be prioritized in zrepl 0.6 and beyond!
+
+0.4.0
+-----
+
+* |feature| support setting zfs send / recv flags in the config (send: ``-wLcepbS`` , recv: ``-ox`` ).
+  Config docs :ref:`here <job-send-options>` and :ref:`here <job-recv-options>` .
+* |feature| parallel replication is now configurable (disabled by default, :ref:`config docs here <replication-option-concurrency>` ).
+* |feature| New ``zrepl status`` UI:
+
+  * Interactive job selection.
+  * Interactively ``zrepl signal`` jobs.
+  * Filter filesystems in the job view by name.
+  * An approximation of the old UI is still included as `--mode legacy` but will be removed in a future release of zrepl.
+
+* |bugfix| Actually use concurrency when listing zrepl abstractions & doing size estimation.
+  These operations were accidentally made sequential in zrepl 0.3.
+* |bugfix| Job hang-up during second replication attempt.
+* |bugfix| Data races conditions in the dataconn rpc stack.
+* |maint| Update to protobuf v1.25 and grpc 1.35.
+
+For users who skipped the 0.3.1 update: please make sure your pruning grid config is correct.
+The following bugfix in 0.3.1 :issue:`caused problems for some users <400>`:
+
+* |bugfix| pruning: ``grid``:  add all snapshots that do not match the regex to the rule's destroy list.
 
 0.3.1
 -----
@@ -45,13 +184,6 @@ Mostly a bugfix release for :ref:`zrepl 0.3 <release-0.3>`.
 * CI infrastructure rework
 * Continuous deployment of that new `stable` branch to zrepl.github.io.
 
-.. NOTE::
-   |  zrepl is a spare-time project primarily developed by `Christian Schwarz <https://cschwarz.com>`_.
-   |  You can support maintenance and feature development through one of the following services:
-   |  |Donate via Patreon| |Donate via GitHub Sponsors| |Donate via Liberapay| |Donate via PayPal|
-   |  Note that PayPal processing fees are relatively high for small donations.
-   |  For SEPA wire transfer and **commercial support**, please `contact Christian directly <https://cschwarz.com>`_.
-
 .. _release-0.3:
 
 0.3

docs/conf.py

@@ -1 +0,0 @@
-sphinxconf/conf.py

docs/conf.py

@@ -0,0 +1,187 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+#
+# zrepl documentation build configuration file, created by
+# sphinx-quickstart on Wed Nov  8 22:28:10 2017.
+#
+# This file is execfile()d with the current directory set to its
+# containing dir.
+#
+# Note that not all possible configuration values are present in this
+# autogenerated file.
+#
+# All configuration values have a default; values that are commented out
+# serve to show the default.
+
+# If extensions (or modules to document with autodoc) are in another directory,
+# add these directories to sys.path here. If the directory is relative to the
+# documentation root, use os.path.abspath to make it absolute, like shown here.
+#
+# import os
+# import sys
+# sys.path.insert(0, os.path.abspath('.'))
+
+
+# -- General configuration ------------------------------------------------
+
+# If your documentation needs a minimal Sphinx version, state it here.
+#
+# needs_sphinx = '1.0'
+
+# Add any Sphinx extension module names here, as strings. They can be
+# extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
+# ones.
+extensions = ['sphinx.ext.todo',
+    'sphinx.ext.githubpages',
+    'sphinx.ext.extlinks',
+    "sphinx_multiversion",
+]
+
+# suppress_warnings = ['image.nonlocal_uri']
+
+# Add any paths that contain templates here, relative to this directory.
+templates_path = ['./_templates']
+
+# The suffix(es) of source filenames.
+# You can specify multiple suffix as a list of string:
+#
+# source_suffix = ['.rst', '.md']
+source_suffix = '.rst'
+
+# The master toctree document.
+master_doc = 'index'
+
+# General information about the project.
+project = 'zrepl'
+copyright = '2017-2023, Christian Schwarz'
+author = 'Christian Schwarz'
+
+# The version info for the project you're documenting, acts as replacement for
+# |version| and |release|, also used in various other places throughout the
+# built documents.
+#
+# The short X.Y version.
+#version = set by sphinxcontrib-versioning
+# The full version, including alpha/beta/rc tags.
+#release = version
+
+# The language for content autogenerated by Sphinx. Refer to documentation
+# for a list of supported languages.
+#
+# This is also used if you do content translation via gettext catalogs.
+# Usually you set "language" from the command line for these cases.
+language = 'en'
+
+# List of patterns, relative to source directory, that match files and
+# directories to ignore when looking for source files.
+# This patterns also effect to html_static_path and html_extra_path
+exclude_patterns = ['_build', 'Thumbs.db', '.DS_Store']
+
+# The name of the Pygments (syntax highlighting) style to use.
+pygments_style = 'sphinx'
+
+# If true, `todo` and `todoList` produce output, else they produce nothing.
+todo_include_todos = True
+
+
+# -- Options for HTML output ----------------------------------------------
+
+# The theme to use for HTML and HTML Help pages.  See the documentation for
+# a list of builtin themes.
+#
+html_theme = 'sphinx_rtd_theme'
+
+# Theme options are theme-specific and customize the look and feel of a theme
+# further.  For a list of options available for each theme, see the
+# documentation.
+#
+# html_theme_options = {}
+
+# Add any paths that contain custom static files (such as style sheets) here,
+# relative to this directory. They are copied after the builtin static files,
+# so a file named "default.css" will overwrite the builtin "default.css".
+html_static_path = ['_static']
+
+html_css_files = [
+    'banner.css',
+]
+
+html_logo = '_static/zrepl.svg'
+
+html_context = {
+  # https://github.com/rtfd/sphinx_rtd_theme/issues/205
+  # Add 'Edit on Github' link instead of 'View page source'
+  "display_github": True,
+  "github_user": "zrepl",
+  "github_repo": "zrepl",
+  "github_version": "master",
+  "conf_py_path": "/docs/",
+  "source_suffix": source_suffix,
+}
+
+# -- Options for HTMLHelp output ------------------------------------------
+
+# Output file base name for HTML help builder.
+htmlhelp_basename = 'zrepldoc'
+
+
+# -- Options for LaTeX output ---------------------------------------------
+
+latex_elements = {
+    # The paper size ('letterpaper' or 'a4paper').
+    #
+    # 'papersize': 'letterpaper',
+
+    # The font size ('10pt', '11pt' or '12pt').
+    #
+    # 'pointsize': '10pt',
+
+    # Additional stuff for the LaTeX preamble.
+    #
+    # 'preamble': '',
+
+    # Latex figure (float) alignment
+    #
+    # 'figure_align': 'htbp',
+}
+
+# Grouping the document tree into LaTeX files. List of tuples
+# (source start file, target name, title,
+#  author, documentclass [howto, manual, or own class]).
+latex_documents = [
+    (master_doc, 'zrepl.tex', 'zrepl Documentation',
+     'Christian Schwarz', 'manual'),
+]
+
+
+# -- Options for manual page output ---------------------------------------
+
+# One entry per manual page. List of tuples
+# (source start file, name, description, authors, manual section).
+man_pages = [
+    (master_doc, 'zrepl', 'zrepl Documentation',
+     [author], 1)
+]
+
+
+# -- Options for Texinfo output -------------------------------------------
+
+# Grouping the document tree into Texinfo files. List of tuples
+# (source start file, target name, title, author,
+#  dir menu entry, description, category)
+texinfo_documents = [
+    (master_doc, 'zrepl', 'zrepl Documentation',
+     author, 'zrepl', 'One line description of project.',
+     'Miscellaneous'),
+]
+
+
+# -- Options for the extlinks extension -----------------------------------
+# http://www.sphinx-doc.org/en/stable/ext/extlinks.html
+extlinks = {
+    'issue':('https://github.com/zrepl/zrepl/issues/%s', 'issue #%s'),
+    'repomasterlink':('https://github.com/zrepl/zrepl/blob/master/%s', '%s'),
+    'sampleconf':('https://github.com/zrepl/zrepl/blob/master/internal/config/samples%s', 'internal/config/samples%s'),
+    'commit':('https://github.com/zrepl/zrepl/commit/%s', 'commit %s'),
+        }
+

docs/configuration.rst

@@ -13,6 +13,7 @@ Configuration
     configuration/filter_syntax
     configuration/sendrecvoptions
     configuration/replication
+    configuration/conflict_resolution
     configuration/snapshotting
     configuration/prune
     configuration/logging

docs/configuration/conflict_resolution.rst

@@ -0,0 +1,37 @@
+.. include:: ../global.rst.inc
+
+.. _conflict_resolution-options:
+
+Conflict Resolution Options
+===========================
+
+
+::
+
+   jobs:
+   - type: push
+     filesystems: ...
+     conflict_resolution:
+       initial_replication: most_recent | all | fail # default: most_recent
+
+     ...
+
+.. _conflict_resolution-initial_replication:
+
+
+``initial_replication`` option
+------------------------------
+
+The ``initial_replication`` option determines how many snapshots zrepl replicates if the filesystem has not been replicated before.
+If ``most_recent`` (the default), the initial replication will only transfer the most recent snapshot, while ignoring previous snapshots.
+If all snapshots should be replicated, specify ``all``.
+Use ``fail`` to make replication of the filesystem fail in case there is no corresponding fileystem on the receiver.
+
+For example, suppose there are snapshosts ``tank@1``, ``tank@2``, ``tank@3`` on a sender.
+Then ``most_recent`` will replicate just ``@3``, but ``all`` will replicate ``@1``, ``@2``, and ``@3``.
+
+If initial replication is interrupted, and there is at least one (maybe partial) snapshot on the receiver, zrepl will always resume in **incremental mode**.
+And that is regardless of where the initial replication was interrupted.
+
+For example, if ``initial_replication: all`` and the transfer of ``@1`` is interrupted, zrepl would retry/resume at ``@1``.
+And even if the user changes the config to ``initial_replication: most_recent`` before resuming, **incremental mode** will still resume at ``@1``.

docs/configuration/jobs.rst

@@ -30,6 +30,10 @@ Job Type ``push``
       - |snapshotting-spec|
     * - ``pruning``
       - |pruning-spec|
+    * - ``replication``
+      - |replication-options|
+    * - ``conflict_resolution``
+      - |conflict-resolution-options|
 
 Example config: :sampleconf:`/push.yml`
 
@@ -81,6 +85,10 @@ Job Type ``pull``
         | ``manual`` disables periodic pulling, replication then only happens on :ref:`wakeup <cli-signal-wakeup>`.
     * - ``pruning``
       - |pruning-spec|
+    * - ``replication``
+      - |replication-options|
+    * - ``conflict_resolution``
+      - |conflict-resolution-options|
 
 Example config: :sampleconf:`/pull.yml`
 

docs/configuration/misc.rst

@@ -1,3 +1,5 @@
+.. _miscellaneous:
+
 Miscellaneous
 =============
 
@@ -42,27 +44,3 @@ Interval & duration fields in job definitions, pruning configurations, etc. must
 
     var durationStringRegex *regexp.Regexp = regexp.MustCompile(`^\s*(\d+)\s*(s|m|h|d|w)\s*$`)
     // s = second, m = minute, h = hour, d = day, w = week (7 days)
-
-Super-Verbose Job Debugging
----------------------------
-
-You have probably landed here because you opened an issue on GitHub and some developer told you to do this...
-So just read the annotated comments ;)
-
-::
-
-    job:
-    - name: ...
-      ...
-     # JOB DEBUGGING OPTIONS
-      # should be equal for all job types, but each job implements the debugging itself
-      debug:
-        conn: # debug the io.ReadWriteCloser connection
-          read_dump: /tmp/connlog_read   # dump results of Read() invocations to this file
-          write_dump: /tmp/connlog_write # dump results of Write() invocations to this file
-        rpc: # debug the RPC protocol implementation
-          log: true # log output from rpc layer to the job log
-
-.. ATTENTION::
-
-    Connection dumps will almost certainly contain your or other's private data. Do not share it in a bug report.

docs/configuration/monitoring.rst

@@ -13,7 +13,7 @@ Prometheus & Grafana
 --------------------
 
 zrepl can expose `Prometheus metrics <https://prometheus.io/docs/instrumenting/exposition_formats/>`_ via HTTP.
-The ``listen`` attribute is a `net.Listen <https://golang.org/pkg/net/#Listen>`_  string for tcp, e.g. ``:9091`` or ``127.0.0.1:9091``.
+The ``listen`` attribute is a `net.Listen <https://golang.org/pkg/net/#Listen>`_  string for tcp, e.g. ``:9811`` or ``127.0.0.1:9811`` (port 9811 was reserved to zrepl `on the official list <https://github.com/prometheus/prometheus/wiki/Default-port-allocations/_compare/43e495dd251ee328ac0d08b58084665b5c0f7a7e...459195059b55b414193ebeb80c5ba463d2606951>`_).
 The ``listen_freebind`` attribute is :ref:`explained here <listen-freebind-explanation>`.
 The Prometheus monitoring job appears in the ``zrepl control`` job list and may be specified **at most once**.
 
@@ -30,7 +30,7 @@ The dashboard also contains some advice on which metrics are important to monito
     global:
       monitoring:
         - type: prometheus
-          listen: ':9091'
+          listen: ':9811'
           listen_freebind: true # optional, default false
 
 

docs/configuration/overview.rst

@@ -3,16 +3,17 @@ Overview & Terminology
 ======================
 
 All work zrepl does is performed by the zrepl daemon which is configured in a single YAML configuration file loaded on startup.
-The following paths are considered:
+The following paths are searched, in this order:
 
-* If set, the location specified via the global ``--config`` flag
-* ``/etc/zrepl/zrepl.yml``
-* ``/usr/local/etc/zrepl/zrepl.yml``
+1. The path specified via the global ``--config`` flag
+2. ``/etc/zrepl/zrepl.yml``
+3. ``/usr/local/etc/zrepl/zrepl.yml``
 
-The ``zrepl configcheck`` subcommand can be used to validate the configuration.
-The command will output nothing and exit with zero status code if the configuration is valid.
+``zrepl configcheck`` can be used to validate the configuration.
+If the configuration is valid, it will output nothing and exit with code ``0``.
 The error messages vary in quality and usefulness: please report confusing config errors to the tracking :issue:`155`.
-Full example configs such as in the :ref:`quick-start guides <quickstart-toc>` or the :sampleconf:`/` directory might also be helpful.
+
+Full example configs are available at :ref:`quick-start guides <quickstart-toc>` and :sampleconf:`/`.
 However, copy-pasting examples is no substitute for reading documentation!
 
 Config File Structure
@@ -26,9 +27,47 @@ Config File Structure
      type: push
    - ...
 
-zrepl is configured using a single YAML configuration file with two main sections: ``global`` and ``jobs``.
-The ``global`` section is filled with sensible defaults and is covered later in this chapter.
-The ``jobs`` section is a list of jobs which we are going to explain now.
+A zrepl configuration file is divided in to two main sections: ``global`` and ``jobs``.
+``global`` has sensible defaults. It is covered in :ref:`logging <logging>`, :ref:`monitoring <monitoring>` \& :ref:`miscellaneous <miscellaneous>`.
+
+
+``conf.d``: including config files
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+It is possible to distribute zrepl configurations over multiple YAML configuration
+files. This is achieved by using the `include` key which can only exist in the main
+configuration file.
+
+The list of included paths must point to either individual YAML files or directories.
+If the path points to a directory then all YAML files with a `.yml` extention in the
+directory will be included.
+
+.. code-block:: yaml
+
+    # /etc/zrepl/zrep.yml
+    global: ...
+    include:
+      - ./jobs.d/
+      - /opt/some_job.yml
+
+    # /etc/zrepl/jobs.d/backup.yml
+    jobs:
+    - name: backup
+      type: push
+    - ...
+
+    # /opt/some_job.yml
+    jobs:
+    - name: another_job
+      ...
+    - ...
+
+
+
+The paths are treated as absolute when starting with `/`, otherwise
+as a relative path to the main config file's parent directory.
+
+Job names must be unique across all included configuration files.
 
 .. _job-overview:
 
@@ -42,8 +81,7 @@ Jobs are identified by their ``name``, both in log files and the ``zrepl status`
 .. NOTE::
    The job name is persisted in several places on disk and thus :issue:`cannot be changed easily<327>`.
 
-
-Replication always happens between a pair of jobs: one is the **active side**, and one the **passive side**.
+Replication always happens between a pair of jobs: one **active side** and one **passive side**.
 The active side connects to the passive side using a :ref:`transport <transport>` and starts executing the replication logic.
 The passive side responds to requests from the active side after checking its permissions.
 
@@ -72,30 +110,29 @@ How the Active Side Works
 
 The active side (:ref:`push <job-push>` and :ref:`pull <job-pull>` job) executes the replication and pruning logic:
 
-* Wakeup because of finished snapshotting (``push`` job) or pull interval ticker (``pull`` job).
-* Connect to the corresponding passive side using a :ref:`transport <transport>` and instantiate an RPC client.
-* Replicate data from the sending to the receiving side (see below).
-* Prune on sender & receiver.
+1. Wakeup after snapshotting (``push`` job) or pull interval ticker (``pull`` job).
+2. Connect to the passive side and instantiate an RPC client.
+3. Replicate data from the sender to the receiver.
+4. Prune on sender & receiver.
 
 .. TIP::
-  The progress of the active side can be watched live using the ``zrepl status`` subcommand.
+  The progress of the active side can be watched live using ``zrepl status``.
 
 .. _overview-passive-side--client-identity:
 
 How the Passive Side Works
 --------------------------
 
-The passive side (:ref:`sink <job-sink>` and :ref:`source <job-source>`) waits for connections from the corresponding active side,
-using the transport listener type specified in the ``serve`` field of the job configuration.
-When a client connects, the transport listener performS listener-specific access control (cert validation, IP ACLs, etc)
-and determines the *client identity*.
-The passive side job then uses this client identity as follows:
+The passive side (:ref:`sink <job-sink>` and :ref:`source <job-source>`) waits for connections from the active side,
+on the :ref:`transport <transport>` specified with ``serve`` in the job configuration.
+The respective transport then perfoms authentication & authorization, resulting in a stable *client identity*.
+The passive side job uses this *client identity* as follows:
 
-* The ``sink`` job maps requests from different client identities to their respective sub-filesystem tree ``root_fs/${client_identity}``.
-* The ``source`` might, in the future, embed the client identity in :ref:`zrepl's ZFS abstraction names <zrepl-zfs-abstractions>` in order to support multi-host replication.
+   * In ``sink`` jobs, to map requests from different *client identities* to their respective sub-filesystem tree ``root_fs/${client_identity}``.
+   * *In the future, ``source`` might embed the client identity in :ref:`zrepl's ZFS abstraction names <zrepl-zfs-abstractions>`, to support multi-host replication.*
 
 .. TIP::
-   The implementation of the ``sink`` job requires that the connecting client identities be a valid ZFS filesystem name components.
+   The use of the client identity in the ``sink`` job implies that it must be usable as a ZFS ZFS filesystem name component.
 
 .. _overview-how-replication-works:
 
@@ -106,7 +143,7 @@ One of the major design goals of the replication module is to avoid any duplicat
 As such, the code works on abstract senders and receiver **endpoints**, where typically one will be implemented by a local program object and the other is an RPC client instance.
 Regardless of push- or pull-style setup, the logic executes on the active side, i.e. in the ``push`` or ``pull`` job.
 
-The following high-level steps take place during replication and can be monitored using the ``zrepl status`` subcommand:
+The following high-level steps take place during replication and can be monitored using ``zrepl status``:
 
 * Plan the replication:
 
@@ -148,6 +185,22 @@ Incremental sends require that ``@from`` be present on the receiving side when r
 Incremental sends can also use a ZFS bookmark as *from* on the sending side (``zfs send -i #bm_from fs@to``), where ``#bm_from`` was created using ``zfs bookmark fs@from fs#bm_from``.
 The receiving side must always have the actual snapshot ``@from``, regardless of whether the sending side uses ``@from`` or a bookmark of it.
 
+.. _zfs-background-knowledge-plain-vs-raw-sends:
+
+**Plain and raw sends**
+By default, ``zfs send`` sends the most generic, backwards-compatible data stream format (so-called 'plain send').
+If the sent uses newer features, e.g. compression or encryption, ``zfs send`` has to un-do these operations on the fly to produce the plain send stream.
+If the receiver uses newer features (e.g. compression or encryption inherited from the parent FS), it applies the necessary transformations again on the fly during ``zfs recv``.
+
+Flags such as ``-e``, ``-c`` and ``-L``  tell ZFS to produce a send stream that is closer to how the data is stored on disk.
+Sending with those flags removes computational overhead from sender and receiver.
+However, the receiver will not apply certain transformations, e.g., it will not compress with the receive-side ``compression`` algorithm.
+
+The ``-w`` (``--raw``) flag produces a send stream that is as *raw* as possible.
+For unencrypted datasets, its current effect is the same as ``-Lce``.
+
+Encrypted datasets can only be sent plain (unencrypted) or raw (encrypted) using the ``-w`` flag.
+
 **Resumable Send & Recv**
 The ``-s`` flag for ``zfs recv`` tells zfs to save the partially received send stream in case it is interrupted.
 To resume the replication, the receiving side filesystem's ``receive_resume_token`` must be passed to a new ``zfs send -t <value> | zfs recv`` command.
@@ -217,22 +270,11 @@ The ``zrepl zfs-abstraction list`` command provides a listing of all bookmarks a
 
     More details can be found in the design document :repomasterlink:`replication/design.md`.
 
-Limitations
-^^^^^^^^^^^
 
-.. ATTENTION::
+Caveats With Complex Setups (More Than 2 Jobs or Machines)
+----------------------------------------------------------
 
-    Currently, zrepl does not replicate filesystem properties.
-    When receiving a filesystem, it is never mounted (`-u` flag)  and `mountpoint=none` is set.
-    This is temporary and being worked on :issue:`24`.
-
-
-.. _jobs-multiple-jobs:
-
-Multiple Jobs & More than 2 Machines
-------------------------------------
-
-The quick-start guides focus on simple setups with a single sender and a single receiver.
+Most users are served well with a single sender and a single receiver job.
 This section documents considerations for more complex setups.
 
 .. ATTENTION::
@@ -246,7 +288,7 @@ This section documents considerations for more complex setups.
 
    If you can't find your desired configuration, have questions or would like to see improvements to multi-job setups, please `open an issue on GitHub <https://github.com/zrepl/zrepl/issues/new>`_.
 
-Multiple Jobs on one Machine
+Multiple Jobs on One Machine
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 As a general rule, multiple jobs configured on one machine **must operate on disjoint sets of filesystems**.
 Otherwise, concurrently running jobs might interfere when operating on the same filesystem.
@@ -255,6 +297,9 @@ On your setup, ensure that
 
 * all ``filesystems`` filter specifications are disjoint
 * no ``root_fs`` is a prefix or equal to another ``root_fs``
+
+  * For ``sink`` jobs, consider all possible ``root_fs/${client_identity}``.
+
 * no ``filesystems`` filter matches any ``root_fs``
 
 **Exceptions to the rule**:
@@ -265,18 +310,53 @@ On your setup, ensure that
   This scenario is detailed in one of the :ref:`quick-start guides <quickstart-backup-to-external-disk>`.
 
 
-More Than 2 Machines
+Two Or More Machines
 ^^^^^^^^^^^^^^^^^^^^
 
 This section might be relevant to users who wish to *fan-in* (N machines replicate to 1) or *fan-out* (replicate 1 machine to N machines).
 
 **Working setups**:
 
-* N ``push`` identities, 1 ``sink`` (as long as the different push jobs have a different :ref:`client identity <overview-passive-side--client-identity>`)
+* **Fan-in: N servers replicated to one receiver, disjoint dataset trees.**
 
-  * ``sink`` constrains each client to a disjoint sub-tree of the sink-side dataset hierarchy ``${root_fs}/${client_identity}``.
+  * This is the common use case of a centralized backup server.
+
+  * Implementation:
+
+    * N ``push`` jobs (one per sender server), 1 ``sink`` (as long as the different push jobs have a different :ref:`client identity <overview-passive-side--client-identity>`)
+    * N ``source`` jobs (one per sender server), N ``pull`` on the receiver server (unique names, disjoint  ``root_fs``)
+
+  * The ``sink`` job automatically constrains each client to a disjoint sub-tree of the sink-side dataset hierarchy ``${root_fs}/${client_identity}``.
     Therefore, the different clients cannot interfere.
 
+  * The ``pull`` job only pulls from one host, so it's up to the zrepl user to ensure that the different ``pull`` jobs don't interfere.
+
+.. _fan-out-replication:
+
+* **Fan-out: 1 server replicated to N receivers**
+
+  * Can be implemented either in a pull or push fashion.
+
+    * **pull setup**: 1 ``pull`` job on each receiver server, each with a corresponding **unique** ``source`` job on the sender server.
+    * **push setup**: 1 ``sink`` job on each receiver server, each with a corresponding **unique** ``push`` job on the sender server.
+
+  * It is critical that we have one sending-side job (``source``, ``push``) per receiver.
+    The reason is that :ref:`zrepl's ZFS abstractions <zrepl-zfs-abstractions>` (``zrepl zfs-abstraction list``) include the name of the ``source``/``push`` job, but not the receive-side job name or client identity (see :issue:`380`).
+    As a counter-example, suppose we used multiple ``pull`` jobs with only one ``source`` job.
+    All ``pull`` jobs would share the same :ref:`replication cursor bookmark <replication-cursor-and-last-received-hold>` and trip over each other, breaking incremental replication guarantees quickly.
+    The anlogous problem exists for 1 ``push`` to N ``sink`` jobs.
+
+  * The ``filesystems`` matched by the sending side jobs (``source``, ``push``) need not necessarily be disjoint.
+    For this to work, we need to avoid interference between snapshotting and pruning of the different sending jobs.
+    The solution is to centralize sender-side snapshot management in a separate ``snap`` job.
+    Snapshotting in the ``source``/``push`` job should then be disabled (``type: manual``).
+    And sender-side pruning (``keep_sender``) needs to be disabled in the active side (``pull`` / ``push``), since that'll be done by the ``snap job``.
+
+  * **Restore limitations**: when restoring from one of the ``pull`` targets (e.g., using ``zfs send -R``), the replication cursor bookmarks don't exist on the restored system.
+    This can break incremental replication to all other receive-sides after restore.
+
+  * See :ref:`the fan-out replication quick-start guide <quickstart-fan-out-replication>` for an example of this setup.
+
 
 **Setups that do not work**:
 

docs/configuration/prune.rst

@@ -50,6 +50,7 @@ Example Configuration:
              regex: "^manual_.*"
 
 .. DANGER::
+
     You might have **existing snapshots** of filesystems affected by pruning which you want to keep, i.e. not be destroyed by zrepl.
     Make sure to actually add the necessary ``regex`` keep rules on both sides, like with ``manual`` in the example above.
 
@@ -67,8 +68,17 @@ Policy ``not_replicated``
      ...
 
 ``not_replicated`` keeps all snapshots that have not been replicated to the receiving side.
-It only makes sense to specify this rule on a sender (source or push job).
-The state required to evaluate this rule is stored in the :ref:`replication cursor bookmark <replication-cursor-and-last-received-hold>` on the sending side.
+It only makes sense to specify this rule for the ``keep_sender``.
+The reason is that, by definition, all snapshots on the receiver have already been replicated to there from the sender.
+To determine whether a sender-side snapshot has already been replicated, zrepl uses the :ref:`replication cursor bookmark <replication-cursor-and-last-received-hold>` which corresponds to the most recent successfully replicated snapshot.
+
+.. ATTENTION::
+
+    If you use ``not_replicated`` in your pruning rules, make sure to :ref:`monitor <monitoring>` replication.
+    If your replication gets stuck then ``not_replicated`` causes snapshots to pile uip on the sender.
+    ZFS and especially the ``zfs`` management command are known to degrade in performance with a lot of snapshots.
+    Such degradation impacts zrepl, any other scripts, and human ability to manage your zpool.
+
 
 .. _prune-keep-retention-grid:
 
@@ -106,7 +116,7 @@ The following procedure happens during pruning:
 #. All subsequent buckets are placed adjacent to their predecessor bucket.
 #. Now each snapshot on the axis either falls into one bucket or it is older than our rightmost bucket.
    Buckets are left-inclusive and right-exclusive which means that a snapshot on the edge of bucket will always 'fall into the right one'.
-#. Snapshots older than the rightmost bucket **not kept** by this gridspec.
+#. Snapshots older than the rightmost bucket are **not kept** by the grid specification.
 #. For each bucket, we only keep the ``keep`` oldest snapshots.
 
 The syntax to describe the bucket list is as follows:
@@ -124,43 +134,51 @@ The syntax to describe the bucket list is as follows:
 
 ::
 
-          This grid spec produces the following list of adjacent buckets. For the sake of simplicity,
-          we subject all snapshots to the grid pruning policy by settings `regex: .*`.
+   Assume the following grid specification:
 
-          `
       grid: 1x1h(keep=all) | 2x2h | 1x3h
-           regex: .*
-          `
+
+   This grid specification produces the following constellation of buckets:
 
    0h        1h        2h        3h        4h        5h        6h        7h        8h        9h
    |         |         |         |         |         |         |         |         |         |
-          |-Bucket1-|-----Bucket 2------|------Bucket 3-----|-----------Bucket 4----------|
+   |-Bucket1-|-----Bucket2-------|------Bucket3------|-----------Bucket4-----------|
    | keep=all|      keep=1       |       keep=1      |            keep=1           |
 
 
 
-          Let us consider the following set of snapshots @a-zA-C:
+   Now assume that we have a set of snapshots @a, @b, ..., @D.
+   Snapshot @a is the most recent snapshot.
+   Snapshot @D is the oldest snapshot, it is almost 9 hours older than snapshot @a.
+   We place the snapshots on the same timeline as the buckets:
 
 
-          |  a  b  c  d  e  f  g  h  i  j  k  l  m  n  o  p  q  r  s  t  u  v  w  x  y  z  A  B  C  D        |
+   0h        1h        2h        3h        4h        5h        6h        7h        8h        9h
+   |         |         |         |         |         |         |         |         |         |
+   |-Bucket1-|-----Bucket2-------|------Bucket3------|-----------Bucket4-----------|
+   | keep=all|      keep=1       |       keep=1      |            keep=1           |
+   |         |                   |                   |                             |
+   | a  b  c | d  e  f  g  h  i  j  k  l  m  n  o  p |q  r  s  t  u  v  w  x  y  z |A  B  C  D
 
-          The `grid` algorithm maps them to their respective buckets:
+   We obtain the following mapping of snapshots to buckets:
 
-          Bucket 1: a, b, c
-          Bucket 2: d,e,f,g,h,i,j
-          Bucket 3: k,l,m,n,o,p
-          Bucket 4: q,r, q,r,s,t,u,v,w,x,y,z
-          None:     A,B,C,D
+   Bucket1:   a,b,c
+   Bucket2:   d,e,f,g,h,i
+   Bucket3:   j,k,l,m,n,o,p
+   Bucket4:   q,r,s,t,u,v,w,x,y,z
+   No bucket: A,B,C,D
 
-          It then applies the per-bucket pruning logic described above which resulting in the
-          following list of remaining snapshots.
+   For each bucket, we now prune snapshots until it only contains `keep` snapshots.
+   Newer snapshots are destroyed first.
+   Snapshots that do not fall into a bucket are always destroyed.
 
-          |  a  b  c                    j                 p                             z                    |
-
-          Note that it only makes sense to grow (not shorten) the interval duration for buckets
-          further in the past since each bucket acts like a low-pass filter for incoming snapshots
-          and adding a less-low-pass-filter after a low-pass one has no effect.
+   Result after pruning:
 
+   0h        1h        2h        3h        4h        5h        6h        7h        8h        9h
+   |         |         |         |         |         |         |         |         |         |
+   |-Bucket1-|-----Bucket2-------|------Bucket3------|-----------Bucket4-----------|
+   |         |                   |                   |                             |
+   | a  b  c |                i  |                 p |                           z |
 
 .. _prune-keep-last-n:
 

docs/configuration/replication.rst

@@ -1,5 +1,6 @@
 .. include:: ../global.rst.inc
 
+.. _replication-options:
 
 Replication Options
 ===================
@@ -14,6 +15,10 @@ Replication Options
        protection:
          initial:     guarantee_resumability # guarantee_{resumability,incremental,nothing}
          incremental: guarantee_resumability # guarantee_{resumability,incremental,nothing}
+       concurrency:
+         size_estimates: 4
+         steps: 1
+
      ...
 
 .. _replication-option-protection:
@@ -45,3 +50,26 @@ which is useful if replication happens so rarely (or fails so frequently) that t
 
    When changing this flag, obsoleted zrepl-managed bookmarks and holds will be destroyed on the next replication step that is attempted for each filesystem.
 
+
+.. _replication-option-concurrency:
+
+``concurrency`` option
+----------------------
+
+The ``concurrency`` options control the maximum amount of concurrency during replication.
+The default values allow some concurrency during size estimation but no parallelism for the actual replication.
+
+* ``concurrency.steps`` (default = 1) controls the maximum number of concurrently executed :ref:`replication steps <overview-how-replication-works>`.
+  The planning step for each file system is counted as a single step.
+* ``concurrency.size_estimates`` (default = 4) controls the maximum number of concurrent step size estimations done by the job.
+
+Note that initial replication cannot start replicating child filesystems before the parent filesystem's initial replication step has completed.
+
+Some notes on tuning these values:
+
+* Disk: Size estimation is less I/O intensive than step execution because it does not need to access the data blocks.
+* CPU: Size estimation is usually a dense CPU burst whereas step execution CPU utilization is stretched out over time because of disk IO.
+  Faster disks, sending a compressed dataset in :ref:`plain mode <zfs-background-knowledge-plain-vs-raw-sends>` and the zrepl transport mode all contribute to higher CPU requirements.
+* Network bandwidth: Size estimation does not consume meaningful amounts of bandwidth, step execution does.
+* :ref:`zrepl ZFS abstractions <zrepl-zfs-abstractions>`: for each replication step zrepl needs to update its ZFS abstractions through the ``zfs`` command which often waits multiple seconds for the zpool to sync.
+  Thus, if the actual send & recv time of a step is small compared to the time spent on zrepl ZFS abstractions then increasing step execution concurrency will result in a lower overall turnaround time.

docs/configuration/sendrecvoptions.rst

@@ -9,22 +9,65 @@ Send & Recv Options
 Send Options
 ~~~~~~~~~~~~
 
+:ref:`Source<job-source>` and :ref:`push<job-push>` jobs have an optional ``send`` configuration section.
+
 ::
 
    jobs:
    - type: push
      filesystems: ...
      send:
-       encrypted: true
+       # flags from the table below go here
      ...
 
-:ref:`Source<job-source>` and :ref:`push<job-push>` jobs have an optional ``send`` configuration section.
+The following table specifies the list of (boolean) options.
+Flags with an entry in the ``zfs send`` column map directly to the zfs send CLI flags.
+zrepl does not perform feature checks for these flags.
+If you enable a flag that is not supported by the installed version of ZFS, the zfs error will show up at runtime in the logs and zrepl status.
+See the `upstream man page <https://openzfs.github.io/openzfs-docs/man/8/zfs-send.8.html>`_ (``man zfs-send``) for their semantics.
 
-``encryption`` option
----------------------
+.. list-table::
+    :widths: 20 10 70
+    :header-rows: 1
 
-The ``encryption`` variable controls whether the matched filesystems are sent as `OpenZFS native encryption <http://open-zfs.org/wiki/ZFS-Native_Encryption>`_ raw sends.
-More specifically, if ``encryption=true``, zrepl
+    * - ``send.``
+      - ``zfs send``
+      - Comment
+    * - ``encrypted``
+      -
+      - Specific to zrepl, :ref:`see below <job-send-options-encrypted>`.
+    * - ``bandwidth_limit``
+      -
+      - Specific to zrepl, :ref:`see below <job-send-recv-options--bandwidth-limit>`.
+    * - ``raw``
+      - ``-w``
+      - Use ``encrypted`` to only allow encrypted sends. Mixed sends are not supported.
+    * - ``send_properties``
+      - ``-p``
+      - **Be careful**, read the :ref:`note on property replication below <job-note-property-replication>`.
+    * - ``backup_properties``
+      - ``-b``
+      - **Be careful**, read the :ref:`note on property replication below <job-note-property-replication>`.
+    * - ``large_blocks``
+      - ``-L``
+      - **Potential data loss on OpenZFS < 2.0**, see :ref:`warning below <job-send-options-large-blocks>`.
+    * - ``compressed``
+      - ``-c``
+      -
+    * - ``embedded_data``
+      - ``-e``
+      -
+    * - ``saved``
+      - ``-S``
+      -
+
+.. _job-send-options-encrypted:
+
+``encrypted``
+-------------
+
+The ``encrypted`` option controls whether the matched filesystems are sent as `OpenZFS native encryption <http://open-zfs.org/wiki/ZFS-Native_Encryption>`_ raw sends.
+More specifically, if ``encrypted=true``, zrepl
 
 * checks for any of the filesystems matched by ``filesystems`` whether the ZFS ``encryption`` property indicates that the filesystem is actually encrypted with ZFS native encryption and
 * invokes the ``zfs send`` subcommand with the ``-w`` option (raw sends) and
@@ -32,14 +75,213 @@ More specifically, if ``encryption=true``, zrepl
 
 Filesystems matched by ``filesystems`` that are not encrypted are not sent and will cause error log messages.
 
-If ``encryption=false``, zrepl expects that filesystems matching ``filesystems`` are not encrypted or have loaded encryption keys.
+If ``encrypted=false``, zrepl expects that filesystems matching ``filesystems`` are not encrypted or have loaded encryption keys.
+
+.. NOTE::
+
+   Use ``encrypted`` instead of ``raw`` to make your intent clear that zrepl must only replicate filesystems that are actually encrypted by OpenZFS native encryption.
+   It is meant as a safeguard to prevent unintended sends of unencrypted filesystems in raw mode.
+
+.. _job-send-options-properties:
+
+``send_properties``
+-------------------
+Sends the dataset properties along with snapshots.
+Please be careful with this option and read the :ref:`note on property replication below <job-note-property-replication>`.
+
+.. _job-send-options-backup-properties:
+
+``backup_properties``
+---------------------
+
+When properties are modified on a filesystem that was received from a send stream with ``send.properties=true``, ZFS archives the original received value internally.
+This also applies to :ref:`inheriting or overriding properties during zfs receive <job-recv-options--inherit-and-override>`.
+
+When sending those received filesystems another hop, the ``backup_properties`` flag instructs ZFS to send the original property values rather than the current locally set values.
+
+This is useful for replicating properties across multiple levels of backup machines.
+**Example:**
+Suppose we want to flow snapshots from Machine A to B, then from B to C.
+A will enable the :ref:`properties send option <job-send-options-properties>`.
+B will want to override :ref:`critical properties such as mountpoint or canmount <job-note-property-replication>`.
+But the job that replicates from B to C should be sending the original property values received from A.
+Thus, B sets the ``backup_properties`` option.
+
+Please be careful with this option and read the :ref:`note on property replication below <job-note-property-replication>`.
+
+.. _job-send-options-large-blocks:
+
+``large_blocks``
+----------------
+
+This flag should not be changed after initial replication.
+Prior to `OpenZFS commit 7bcb7f08 <https://github.com/openzfs/zfs/pull/10383/files#diff-4c1e47568f46fb63546e984943b09a3e6b051e2242649523f7835bbdfe2a9110R337-R342>`_
+it was possible to change this setting which resulted in **data loss on the receiver**.
+The commit in question is included in OpenZFS 2.0 and works around the problem by prohibiting receives of incremental streams with a flipped setting.
+
+.. WARNING::
+
+   This bug has **not been fixed in the OpenZFS 0.8 releases** which means that changing this flag after initial replication might cause **data loss** on the receiver.
 
 .. _job-recv-options:
 
 Recv Options
 ~~~~~~~~~~~~
 
-:ref:`Sink<job-sink>` and :ref:`pull<job-pull>` jobs have an optional ``recv`` configuration section.
-However, there are currently no variables to configure there.
+:ref:`Sink<job-sink>` and :ref:`pull<job-pull>` jobs have an optional ``recv`` configuration section:
+
+::
+
+   jobs:
+   - type: pull
+     recv:
+       properties:
+         inherit:
+           - "mountpoint"
+         override: {
+           "org.openzfs.systemd:ignore": "on"
+         }
+       bandwidth_limit: ...
+       placeholder:
+         encryption: unspecified | off | inherit
+     ...
+
+Jump to
+:ref:`properties <job-recv-options--inherit-and-override>` ,
+:ref:`bandwidth_limit <job-send-recv-options--bandwidth-limit>` , and
+:ref:`placeholder <job-recv-options--placeholder>`.
+
+.. _job-recv-options--inherit-and-override:
+
+``properties``
+--------------
+
+``override`` maps directly to the `zfs recv -o flag <https://openzfs.github.io/openzfs-docs/man/8/zfs-recv.8.html>`_.
+Property name-value pairs specified in this map will apply to all received filesystems, regardless of whether the send stream contains properties or not.
+
+``inherit`` maps directly to the `zfs recv -x flag <https://openzfs.github.io/openzfs-docs/man/8/zfs-recv.8.html>`_.
+Property names specified in this list will be inherited from the receiving side's parent filesystem (e.g. ``root_fs``).
+
+With both options, the sending side's property value is still stored on the receiver, but the local override or inherit is the one that takes effect.
+You can send the original properties from the first receiver to another receiver using :ref:`send.backup_properties<job-send-options-backup-properties>`.
 
 
+.. _job-note-property-replication:
+
+A Note on Property Replication
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+If a send stream contains properties, as per ``send.send_properties`` or ``send.backup_properties``,
+the default ZFS behavior is to use those properties on the receiving side, verbatim.
+
+In many use cases for zrepl, this can have devastating consequences.
+For example, when backing up a filesystem that has ``mountpoint=/`` to a storage server,
+that storage server's root filesystem will be shadowed by the received file system on some platforms.
+Also, many scripts and tools use ZFS user properties for configuration and do not check the property source (``local`` vs. ``received``).
+If they are installed on the receiving side as well as the sending side, property replication could have unintended effects.
+
+**zrepl currently does not provide any automatic safe-guards for property replication:**
+
+* Make sure to read the entire man page on zfs recv (`man zfs recv <https://openzfs.github.io/openzfs-docs/man/8/zfs-recv.8.html>`_) before enabling this feature.
+* Use ``recv.properties.override`` whenever possible, e.g. for ``mountpoint=none`` or ``canmount=off``.
+* Use ``recv.properties.inherit`` if that makes more sense to you.
+
+Below is an **non-exhaustive list of problematic properties**.
+Please open a pull request if you find a property that is missing from this list.
+(Both with regards to core ZFS tools and other software in the broader ecosystem.)
+
+Mount behaviour
+---------------
+
+* ``mountpoint``
+* ``canmount``
+* ``overlay``
+
+Note: Before `OpenZFS 2.0.5 <https://github.com/openzfs/zfs/issues/11416>`_, inheriting or overriding the ``mountpoint`` property on ZVOLs fails in ``zfs recv``.
+If you are on such an older version, consider creating separate zrepl jobs for your ZVOL and filesystem datasets.
+
+Systemd
+-------
+
+With systemd, you should also consider the properties processed by the `zfs-mount-generator <https://manpages.debian.org/buster-backports/zfsutils-linux/zfs-mount-generator.8.en.html>`_ .
+
+Most notably:
+
+* ``org.openzfs.systemd:ignore``
+* ``org.openzfs.systemd:wanted-by``
+* ``org.openzfs.systemd:required-by``
+
+Encryption
+----------
+
+If the sender filesystems are encrypted but the sender does :ref:`plain sends <zfs-background-knowledge-plain-vs-raw-sends>`
+and property replication is enabled, the receiver must :ref:`inherit the following properties<job-recv-options--inherit-and-override>`:
+
+* ``keylocation``
+* ``keyformat``
+* ``encryption``
+
+Sharing
+-------
+
+You may not want the replicated filesystem shared in the same way as the source is.
+
+* ``sharenfs``
+* ``sharesmb``
+
+.. _job-recv-options--placeholder:
+
+Placeholders
+~~~~~~~~~~~~
+
+::
+
+   placeholder:
+     encryption: unspecified | off | inherit
+
+During replication, zrepl :ref:`creates placeholder datasets <replication-placeholder-property>` on the receiving side if the sending side's ``filesystems`` filter creates gaps in the dataset hierarchy.
+This is generally fully transparent to the user.
+However, with OpenZFS Native Encryption, placeholders require zrepl user attention.
+Specifically, the problem is that, when zrepl attempts to create the placeholder dataset on the receiver, and that placeholder's parent dataset is encrypted, ZFS wants to inherit encryption to the placeholder.
+This is relevant to two use cases that zrepl supports:
+
+1. **encrypted-send-to-untrusted-receiver** In this use case, the sender sends an :ref:`encrypted send stream <job-send-options-encrypted>` and the receiver doesn't have the key loaded.
+2. **send-plain-encrypt-on-receive** The receive-side ``root_fs`` dataset is encrypted, and the senders are unencrypted.
+   The key of ``root_fs`` is loaded, and the goal is that the plain sends (e.g., from production) are encrypted on-the-fly during receive, with ``root_fs``'s key.
+
+For **encrypted-send-to-untrusted-receiver**, the placeholder datasets need to be created with ``-o encryption=off``.
+Without it, creation would fail with an error, indicating that the placeholder's parent dataset's key needs to be loaded.
+But we don't trust the receiver, so we can't expect that to ever happen.
+
+However, for **send-plain-encrypt-on-receive**, we cannot set ``-o encryption=off``.
+The reason is that if we did, any of the (non-placeholder) child datasets below the placeholder would inherit ``encryption=off``, thereby silently breaking our encrypt-on-receive use case.
+So, to cover this use case, we need to create placeholders without specifying ``-o encryption``.
+This will make ``zfs create`` inherit the encryption mode from the parent dataset, and thereby transitively from ``root_fs``.
+
+The zrepl config provides the `recv.placeholder.encryption` knob to control this behavior.
+In ``undefined`` mode (default), placeholder creation bails out and asks the user to configure a behavior.
+In ``off`` mode, the placeholder is created with ``encryption=off``, i.e., **encrypted-send-to-untrusted-rceiver** use case.
+In ``inherit`` mode, the placeholder is created without specifying ``-o encryption`` at all, i.e., the **send-plain-encrypt-on-receive** use case.
+
+
+Common Options
+~~~~~~~~~~~~~~
+
+.. _job-send-recv-options--bandwidth-limit:
+
+Bandwidth Limit (send & recv)
+-----------------------------
+
+::
+
+   bandwidth_limit:
+     max: 23.5 MiB # -1 is the default and disabled rate limiting
+     bucket_capacity: # token bucket capacity in bytes; defaults to 128KiB
+
+Both ``send`` and ``recv`` can be limited to a maximum bandwidth through ``bandwidth_limit``.
+For most users, it should be sufficient to just set ``bandwidth_limit.max``.
+The ``bandwidth_limit.bucket_capacity`` refers to the `token bucket size <https://github.com/juju/ratelimit>`_.
+
+The bandwidth limit only applies to the payload data, i.e., the ZFS send stream.
+It does not account for transport protocol overheads.
+The scope is the job level, i.e., all :ref:`concurrent <replication-option-concurrency>` sends or incoming receives of a job share the bandwidth limit.

docs/configuration/snapshotting.rst

@@ -5,53 +5,158 @@
 Taking Snaphots
 ===============
 
-The ``push``, ``source`` and ``snap`` jobs can automatically take periodic snapshots of the filesystems matched by the ``filesystems`` filter field.
-The snapshot names are composed of a user-defined prefix followed by a UTC date formatted like ``20060102_150405_000``.
-We use UTC because it will avoid name conflicts when switching time zones or between summer and winter time.
+You can configure zrepl to take snapshots of the filesystems in the ``filesystems`` field specified in ``push``, ``source`` and ``snap`` jobs.
 
-When a job is started, the snapshotter attempts to get the snapshotting rhythms of the matched ``filesystems`` in sync because snapshotting all filesystems at the same time results in a more consistent backup.
-To find that sync point, the most recent snapshot, made by the snapshotter, in any of the matched ``filesystems`` is used.
-A filesystem that does not have snapshots by the snapshotter has lower priority than filesystem that do, and thus might not be snapshotted (and replicated) until it is snapshotted at the next sync point.
+The following snapshotting types are supported:
 
-For ``push`` jobs, replication is automatically triggered after all filesystems have been snapshotted.
 
-Note that the ``zrepl signal wakeup JOB`` subcommand does not trigger snapshotting.
+.. list-table::
+    :widths: 20 70
+    :header-rows: 1
 
+    * - ``snapshotting.type``
+      - Comment
+    * - ``periodic``
+      - Ensure that snapshots are taken at a particular interval.
+    * - ``cron``
+      - Use cron spec to take snapshots at particular points in time.
+    * - ``manual``
+      - zrepl does not take any snapshots by itself.
+
+The ``periodic`` and ``cron`` snapshotting types share some common options and behavior:
+
+* **Naming:** The snapshot names are composed of a user-defined ``prefix`` followed by a UTC date formatted like ``20060102_150405_000`` by default.
+  We either use UTC or timestamp with timezone information because it will avoid name conflicts when switching time zones or between summer and winter time.
+  Note that if timestamp with time zone information is used, the "+" of the timezone (i.e. +02:00) is replaced by "_" (i.e. _02:00) to conform to allowed characters in ZFS snapshots.
+* **Hooks:** You can configure hooks to run before or after zrepl takes the snapshots. See :ref:`below <job-snapshotting-hooks>` for details.
+* **Push replication:** After creating all snapshots, the snapshotter will wake up the replication part of the job, if it's a ``push`` job.
+  Note that snapshotting is decoupled from replication, i.e., if it is down or takes too long, snapshots will still be taken.
+  Note further that other jobs are not woken up by snapshotting.
+
+.. NOTE::
+
+   There is **no concept of ownership** of the snapshots that are created by ``periodic`` or ``cron``.
+   Thus, there is no distinction between zrepl-created snapshots and user-created snapshots during replication or pruning.
+
+   In particular, pruning will take all snapshots into consideration by default.
+   To constrain pruning to just zrepl-created snapshots:
+
+     1. Assign a unique `prefix` to the snapshotter and
+     2. Use the ``regex`` functionality of the various pruning ``keep`` rules to just consider snapshots with that prefix.
+
+  There is currently no way to constrain replication to just zrepl-created snapshots.
+  Follow and comment at :issue:`403` if you need this functionality.
+
+.. NOTE::
+
+  The ``zrepl signal wakeup JOB`` subcommand does not trigger snapshotting.
+
+``periodic`` Snapshotting
+-------------------------
 
 ::
 
    jobs:
-    - type: push
-      filesystems: {
-        "<": true,
-        "tmp": false
-      }
+   - ...
+     filesystems: { ... }
      snapshotting:
        type: periodic
        prefix: zrepl_
        interval: 10m
+       # Timestamp format that is used as snapshot suffix.
+       # Can be any of "dense" (default), "human", "iso-8601", "unix-seconds" or a custom Go time format (see https://go.dev/src/time/format.go)
+       timestamp_format: dense
+       # Specifies in which time zone the snapshot suffix is generated, optional, defaults to UTC, used only if time zone information is part of timestamp_format.
+       # Can be "UTC" (default), "Local" (time zone information from the OS) or any of the IANA Time Zone names (see https://nodatime.org/TimeZones)
+       timestamp_location: UTC
        hooks: ...
-      ...
+    pruning: ...
 
-There is also a ``manual`` snapshotting type, which covers the following use cases:
+The ``periodic`` snapshotter ensures that snapshots are taken in the specified ``interval``.
+If you use zrepl for backup, this translates into your recovery point objective (RPO).
+To meet your RPO, you still need to monitor that replication, which happens asynchronously to snapshotting, actually works.
 
-* Existing infrastructure for automatic snapshots: you only want to use this zrepl job for replication.
-* Handling snapshotting through a separate ``snap`` job.
+It is desirable to get all ``filesystems`` snapshotted simultaneously because it results in a more consistent backup.
+To accomplish this while still maintaining the ``interval``, the ``periodic`` snapshotter attempts to get the snapshotting rhythms in sync.
+To find that sync point, the most recent snapshot, created by the snapshotter, in any of the matched ``filesystems`` is used.
+A filesystem that does not have snapshots by the snapshotter has lower priority than filesystem that do, and thus might not be snapshotted (and replicated) until it is snapshotted at the next sync point.
+The snapshotter uses the ``prefix`` to identify which snapshots it created.
 
-Note that you will have to trigger replication manually using the ``zrepl signal wakeup JOB`` subcommand in that case.
+.. _job-snapshotting--cron:
+
+``cron`` Snapshotting
+---------------------
+
+::
+
+   jobs:
+   - type: snap
+     filesystems: { ... }
+     snapshotting:
+       type: cron
+       prefix: zrepl_
+       # (second, optional) minute hour day-of-month month day-of-week
+       # This example takes snapshots daily at 3:00.
+       cron: "0 3 * * *"
+       # Timestamp format that is used as snapshot suffix.
+       # Can be any of "dense" (default), "human", "iso-8601", "unix-seconds" or a custom Go time format (see https://go.dev/src/time/format.go)
+       timestamp_format: dense
+       # Specifies in which time zone the snapshot suffix is generated, optional, defaults to UTC, used only if time zone information is part of timestamp_format.
+       # Can be "UTC" (default), "Local" (time zone information from the OS) or any of the IANA Time Zone names (see https://nodatime.org/TimeZones)
+       timestamp_location: UTC
+     pruning: ...
+
+In ``cron`` mode, the snapshotter takes snaphots at fixed points in time.
+See https://en.wikipedia.org/wiki/Cron for details on the syntax.
+zrepl uses the ``the github.com/robfig/cron/v3`` Go package for parsing.
+An optional field for "seconds" is supported to take snapshots at sub-minute frequencies.
+
+
+``manual`` Snapshotting
+-----------------------
 
 ::
 
    jobs:
    - type: push
-     filesystems: {
-       "<": true,
-       "tmp": false
-     }
      snapshotting:
        type: manual
      ...
 
+In ``manual`` mode, zrepl does not take snapshots by itself.
+Manual snapshotting is most useful if you have existing infrastructure for snapshot management.
+Or, if you want to decouple snapshot management from replication using a zrepl ``snap`` job.
+See :ref:`this quickstart guide <quickstart-backup-to-external-disk>` for an example.
+
+To trigger replication after taking snapshots, use the ``zrepl signal wakeup JOB`` command.
+
+.. _job-snapshotting-timestamp_format:
+
+Timestamp Format
+----------------
+
+The ``cron`` and ``periodic`` snapshotter support configuring a custom timestamp format that is used as suffix for the snapshot name.
+
+By default, the current time is converted to UTC and then formatted using the ``dense`` format.
+
+Both time zone and format can be customized by setting ``timestamp_format`` and/or ``timestamp_location``.
+
+``timestamp_location`` is fed verbatim into `time.LoadLocation <https://pkg.go.dev/time#LoadLocation>`_.
+
+ ``timestamp_format`` supports the following values (case-insensitive).
+
+* ``dense`` => Go format string ``20060102_150405_000``
+* ``human`` => Go format string ``2006-01-02_15:04:05``
+* ``iso-8601`` => Go format string ``2006-01-02T15:04:05.000Z07:00``
+* ``unix-seconds`` => Unix seconds since the epoch, formatted as a decimal string (`time.Time.Unix <https://pkg.go.dev/time#Time.Unix>`_)
+* Any custom Go time format accepted by `time.Time#Format <https://go.dev/src/time/format.go>`_.
+
+The ``dense``, ``human``, and ``unix-seconds`` formats require the ``timestamp_location`` to be ``UTC`` because they do not contain timezone information.
+
+The ``+`` character is `not allowed in ZFS snapshot names <https://github.com/openzfs/zfs/blob/1d3ba0bf01020f5459b1c28db3979129088924c0/module/zcommon/zfs_namecheck.c#L334-L351>`_.
+Format strings are disallowed to contain the ``+`` character (it's not a character that is interpreted by ``time.Time.Format``, so there's no reason to use it).
+If a format _produces_ a ``+``, that ``+`` is replaced by an `_`` character.
+
 .. _job-snapshotting-hooks:
 
 Pre- and Post-Snapshot Hooks

docs/configuration/transports.rst

@@ -165,7 +165,7 @@ The connection fails if either do not match.
 Mutual-TLS between Two Machines
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-However, for a two-machine setup, self-signed certificates distributed using an out-of-band mechanism will also work just fine:
+For a two-machine setup, self-signed certificates distributed using an out-of-band mechanism will also work just fine:
 
 Suppose you have a push-mode setup, with `backups.example.com` running the :ref:`sink job <job-sink>`, and `prod.example.com` running the :ref:`push job <job-push>`.
 Run the following OpenSSL commands on each host, substituting HOSTNAME in both filenames and the interactive input prompt by OpenSSL:
@@ -218,19 +218,19 @@ Tools like `EasyRSA <https://github.com/OpenVPN/easy-rsa>`_ make this very easy:
      #!/usr/bin/env bash
      set -euo pipefail
 
-     HOSTS=(backupserver prod1 prod2 prod3)
+     HOSTS=(backupserver prod1 prod2 prod3 10.23.42.1)
 
-     curl -L https://github.com/OpenVPN/easy-rsa/releases/download/v3.0.7/EasyRSA-3.0.7.tgz > EasyRSA-3.0.7.tgz
-     echo "157d2e8c115c3ad070c1b2641a4c9191e06a32a8e50971847a718251eeb510a8  EasyRSA-3.0.7.tgz" | sha256sum -c
-     rm -rf EasyRSA-3.0.7
-     tar -xf EasyRSA-3.0.7.tgz
-     cd EasyRSA-3.0.7
-     ./easyrsa
-     ./easyrsa init-pki
-     ./easyrsa build-ca nopass
+     curl -L https://github.com/OpenVPN/easy-rsa/releases/download/v3.2.5/EasyRSA-3.2.5.tgz > EasyRSA-3.2.5.tgz
+     echo "662ee3b453155aeb1dff7096ec052cd83176c460cfa82ac130ef8568ec4df490  EasyRSA-3.2.5.tgz" | sha256sum -c
+     rm -rf EasyRSA-3.2.5
+     tar -xf EasyRSA-3.2.5.tgz
+     cd EasyRSA-3.2.5
+     ./easyrsa --batch
+     ./easyrsa --batch init-pki
+     ./easyrsa --batch build-ca nopass
 
      for host in "${HOSTS[@]}"; do
-         ./easyrsa build-serverClient-full $host nopass
+         ./easyrsa --batch --auto-san build-serverClient-full $host nopass
          echo cert for host $host available at pki/issued/$host.crt
          echo key for host $host available at pki/private/$host.key
      done

docs/global.rst.inc

@@ -5,7 +5,7 @@
 
 .. |GitHub license| image:: https://img.shields.io/github/license/zrepl/zrepl.svg
    :target: https://github.com/zrepl/zrepl/blob/master/LICENSE
-.. |Language: Go| image:: https://img.shields.io/badge/language-Go-6ad7e5.svg
+.. |Language: Go| image:: https://img.shields.io/badge/lang-Go-6ad7e5.svg
    :target: https://golang.org/
 .. |User Docs| image:: https://img.shields.io/badge/docs-web-blue.svg
    :target: https://zrepl.github.io
@@ -13,18 +13,21 @@
    :target: https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=R5QSXJVYHGX96
 .. |Donate via Liberapay| image:: https://img.shields.io/liberapay/patrons/zrepl.svg?logo=liberapay
    :target: https://liberapay.com/zrepl/donate
-.. |Donate via Patreon| image:: https://img.shields.io/badge/dynamic/json?color=yellow&label=Patreon&query=data.attributes.patron_count&suffix=%20patrons&url=https%3A%2F%2Fwww.patreon.com%2Fapi%2Fcampaigns%2F3095079
+.. |Donate via Patreon| image:: https://img.shields.io/badge/dynamic/json?color=yellow&label=Patreon&query=data.attributes.patron_count&url=https%3A%2F%2Fwww.patreon.com%2Fapi%2Fcampaigns%2F3095079
    :target: https://www.patreon.com/zrepl
 .. |Donate via GitHub Sponsors| image:: https://img.shields.io/static/v1?label=Sponsor&message=%E2%9D%A4&logo=GitHub&style=flat&color=yellow
    :target: https://github.com/sponsors/problame
 .. |Twitter| image:: https://img.shields.io/twitter/url/https/github.com/zrepl/zrepl.svg?style=social
    :target: https://twitter.com/intent/tweet?text=Wow:&url=https%3A%2F%2Fgithub.com%2Fzrepl%2Fzrepl
-
+.. |Matrix| image:: https://img.shields.io/badge/chat-matrix-blue.svg
+   :target: https://matrix.to/#/#zrepl:matrix.org
 
 .. |serve-transport| replace:: :ref:`serve specification<transport>`
 .. |connect-transport| replace:: :ref:`connect specification<transport>`
 .. |send-options| replace:: :ref:`send options<job-send-options>`, e.g. for encrypted sends
 .. |recv-options| replace:: :ref:`recv options<job-recv-options>`
+.. |replication-options| replace:: :ref:`replication options<replication-options>`
+.. |conflict-resolution-options| replace:: :ref:`conflict resolution options<conflict_resolution-options>`
 .. |snapshotting-spec| replace:: :ref:`snapshotting specification <job-snapshotting-spec>`
 .. |pruning-spec| replace:: :ref:`pruning specification <prune>`
 .. |filter-spec| replace:: :ref:`filter specification<pattern-filter>`

docs/index.rst

@@ -5,7 +5,7 @@
 
 .. include:: global.rst.inc
 
-|GitHub license| |Language: Go| |Twitter| |Donate via Patreon| |Donate via GitHub Sponsors| |Donate via Liberapay| |Donate via PayPal|
+|GitHub license| |Language: Go| |Twitter| |Donate via Patreon| |Donate via GitHub Sponsors| |Donate via Liberapay| |Donate via PayPal| |Matrix|
 
 
 zrepl - ZFS replication
@@ -25,10 +25,10 @@ zrepl - ZFS replication
          Progress: [=========================\----] 246.7 MiB / 264.7 MiB @ 11.5 MiB/s
            zroot              STEPPING (step 1/2, 624 B/1.2 KiB) next: @a => @b
            zroot/ROOT         DONE (step 2/2, 1.2 KiB/1.2 KiB)
-           zroot/ROOT/default STEPPING (step 1/2, 123.4 MiB/129.3 MiB) next: @a => @b
+         * zroot/ROOT/default STEPPING (step 1/2, 123.4 MiB/129.3 MiB) next: @a => @b
            zroot/tmp          STEPPING (step 1/2, 29.9 KiB/44.2 KiB) next: @a => @b
            zroot/usr          STEPPING (step 1/2, 624 B/1.2 KiB) next: @a => @b
-           zroot/usr/home     STEPPING (step 1/2, 123.3 MiB/135.3 MiB) next: @a => @b
+         * zroot/usr/home     STEPPING (step 1/2, 123.3 MiB/135.3 MiB) next: @a => @b
            zroot/var          STEPPING (step 1/2, 624 B/1.2 KiB) next: @a => @b
            zroot/var/audit    DONE (step 2/2, 1.2 KiB/1.2 KiB)
            zroot/var/crash    DONE (step 2/2, 1.2 KiB/1.2 KiB)
@@ -61,7 +61,12 @@ Main Features
     * [x] Automatic ZFS holds during send & receive
     * [x] Automatic bookmark \& hold management for guaranteed incremental send & recv 
     * [x] Encrypted raw send & receive to untrusted receivers (OpenZFS native encryption)
-    * [ ] Compressed send & receive
+    * [x] Properties send & receive
+    * [x] Compressed send & receive
+    * [x] Large blocks send & receive
+    * [x] Embedded data send & receive
+    * [x] Resume state send & receive
+    * [x] Bandwidth limiting
 
 * **Automatic snapshot management**
 
@@ -132,5 +137,6 @@ Table of Contents
    pr
    changelog
    GitHub Repository & Issue Tracker <https://github.com/zrepl/zrepl>
+   Chat: Matrix <https://matrix.to/#/#zrepl:matrix.org>
    supporters
 

docs/installation.rst

@@ -11,10 +11,9 @@ Installation
 
 .. toctree::
 
-    installation/user-privileges
     installation/packages
     installation/apt-repos
     installation/rpm-repos
-    installation/compile-from-source
+    installation/user-privileges
     installation/freebsd-jail-with-iocage
     installation/what-next

docs/installation/apt-repos.rst

@@ -9,18 +9,29 @@ The fingerprint of the signing key is ``E101 418F D3D6 FBCB 9D65  A62D 7086 99FC
 It is available at `<https://zrepl.cschwarz.com/apt/apt-key.asc>`_ .
 Please open an issue in on GitHub if you encounter any issues with the repository.
 
-The following snippet configure the repository for your Debian or Ubuntu release:
-
 ::
 
-    apt update && apt install curl gnupg lsb-release; \
-    ARCH="$(dpkg --print-architecture)"; \
-    CODENAME="$(lsb_release -i -s | tr '[:upper:]' '[:lower:]') $(lsb_release -c -s | tr '[:upper:]' '[:lower:]')"; \
-    echo "Using Distro and Codename: $CODENAME"; \
-    (curl https://zrepl.cschwarz.com/apt/apt-key.asc | apt-key add -) && \
-    (echo "deb [arch=$ARCH] https://zrepl.cschwarz.com/apt/$CODENAME main" > /etc/apt/sources.list.d/zrepl.list) && \
-    apt update
+    (
+    set -ex
+    zrepl_apt_key_url=https://zrepl.cschwarz.com/apt/apt-key.asc
+    zrepl_apt_key_dst=/usr/share/keyrings/zrepl.gpg
+    zrepl_apt_repo_file=/etc/apt/sources.list.d/zrepl.list
 
+    # Install dependencies for subsequent commands
+    sudo apt update && sudo apt install curl gnupg lsb-release
+
+    # Deploy the zrepl apt key.
+    curl -fsSL "$zrepl_apt_key_url" | tee | gpg --dearmor | sudo tee "$zrepl_apt_key_dst" > /dev/null
+
+    # Add the zrepl apt repo.
+    ARCH="$(dpkg --print-architecture)"
+    CODENAME="$(lsb_release -i -s | tr '[:upper:]' '[:lower:]') $(lsb_release -c -s | tr '[:upper:]' '[:lower:]')"
+    echo "Using Distro and Codename: $CODENAME"
+    echo "deb [arch=$ARCH signed-by=$zrepl_apt_key_dst] https://zrepl.cschwarz.com/apt/$CODENAME main" | sudo tee "$zrepl_apt_repo_file" > /dev/null
+
+    # Update apt repos.
+    sudo apt update
+    )
 
 .. NOTE::
 

docs/installation/compile-from-source.rst

@@ -1,43 +0,0 @@
-.. _binary releases: https://github.com/zrepl/zrepl/releases
-
-.. _installation-compile-from-source:
-
-Compile From Source
-~~~~~~~~~~~~~~~~~~~
-
-Producing a release requires **Go 1.11** or newer and **Python 3** + **pip3** + ``docs/requirements.txt`` for the Sphinx documentation.
-A tutorial to install Go is available over at `golang.org <https://golang.org/doc/install>`_.
-Python and pip3 should probably be installed via your distro's package manager.
-
-::
-   cd to/your/zrepl/checkout
-   python3 -m venv3
-   source venv3/bin/activate
-   ./lazy.sh devsetup
-   make release
-   # build artifacts are available in ./artifacts/release
-
-The Python venv is used for the documentation build dependencies.
-If you just want to build the zrepl binary, leave it out and use `./lazy.sh godep` instead.
-
-Alternatively, you can use the Docker build process:
-it is used to produce the official zrepl `binary releases`_
-and serves as a reference for build dependencies and procedure:
-
-::
-
-    cd to/your/zrepl/checkout
-    # make sure your user has access to the docker socket
-    make release-docker
-    # if you want .deb or .rpm packages, invoke the follwoing
-    # targets _after_ you invoked release-docker
-    make deb-docker
-    make rpm-docker
-    # build artifacts are available in ./artifacts/release
-    # packages are available in ./artifacts
-
-
-.. NOTE::
-
-    It is your job to install the built binary in the zrepl users's ``$PATH``, e.g. ``/usr/local/bin/zrepl``.
-    Otherwise, the examples in the :ref:`quick-start guides <quickstart-toc>` may need to be adjusted.

docs/installation/freebsd-jail-with-iocage.rst

@@ -93,6 +93,7 @@ Enable the zrepl daemon to start automatically at boot:
 
    sysrc zrepl_enable="YES"
 
+Now jump to :ref:`the summary <installation-freebsd-jail-summary>` below.
 
 Plugin
 ######
@@ -134,7 +135,18 @@ Now ``zrepl`` can be started.
 
    service zrepl start
 
+Now jump to :ref:`the summary <installation-freebsd-jail-summary>` below.
+
+.. _installation-freebsd-jail-summary:
+
 Summary
 -------
 
 Congratulations, you have a working jail!
+
+.. NOTE::
+
+   With FreeBSD 13's transition to OpenZFS 2.0, please ensure that your jail's FreeBSD version matches the one in the kernel module.
+   If you are getting cryptic errors such as
+   ``cannot receive new filesystem stream: invalid backup stream``
+   the instructions posted `here <https://github.com/zrepl/zrepl/issues/500#issuecomment-966215205>`_ might help.

docs/installation/packages.rst

@@ -16,6 +16,9 @@ The following list may be incomplete, feel free to submit a PR with an update:
     * - OS / Distro
       - Install Command
       - Link
+    * - any
+      - Statically linked binaries.
+      - `Official GitHub releases <binary releases_>`_
     * - FreeBSD
       - ``pkg install zrepl``
       - `<https://www.freshports.org/sysutils/zrepl/>`_
@@ -30,7 +33,7 @@ The following list may be incomplete, feel free to submit a PR with an update:
     * - Arch Linux
       - ``yay install zrepl``
       - Available on `AUR <https://aur.archlinux.org/packages/zrepl>`_
-    * - Fedora, CentOS, RHEL, OpenSUSE
+    * - Fedora / RHEL / OpenSUSE
       - ``dnf install zrepl``
       - :ref:`RPM repository config <installation-rpm-repos>`
     * - Debian + Ubuntu
@@ -42,6 +45,6 @@ The following list may be incomplete, feel free to submit a PR with an update:
     * - Void Linux
       - ``xbps-install zrepl``
       - Available since `a88a2a4 <https://github.com/void-linux/void-packages/commit/a88a2a4d7bf56072dadf61ab56b8424e39155890>`_
-    * - Others
-      -
-      - Use `binary releases`_ or build from source.
+    * - any
+      - Build from source
+      - :repomasterlink:`README.md`.

docs/installation/rpm-repos.rst

@@ -6,25 +6,50 @@ RPM repositories
 We provide a single RPM repository for all RPM-based Linux distros.
 The zrepl binary in the repo is the same as the one published to GitHub.
 Since Go binaries are statically linked, the RPM should work about everywhere.
-
-The fingerprint of the signing key is ``F6F6 E8EA 6F2F 1462 2878 B5DE 50E3 4417 826E 2CE6``.
-It is available at `<https://zrepl.cschwarz.com/rpm/rpm-key.asc>`_ .
 Please open an issue on GitHub if you encounter any issues with the repository.
 
-Copy-paste the following snippet into your shell to set up the zrepl repository.
-Then ``dnf install zrepl`` and make sure to confirm that the signing key matches the one shown above.
-
-::
-
-    cat > /etc/yum.repos.d/zrepl.repo <<EOF
-    [zrepl]
-    name = zrepl
-    baseurl = https://zrepl.cschwarz.com/rpm/repo
-    gpgkey = https://zrepl.cschwarz.com/rpm/rpm-key.asc
-    EOF
+The fingerprint of the repo & package signing key is:
+``F6F6 E8EA 6F2F 1462 2878 B5DE 50E3 4417 826E 2CE6``.
+It is available at `<https://zrepl.cschwarz.com/rpm/rpm-key.asc>`_ .
 
 .. NOTE::
 
    Until zrepl reaches 1.0, the repository will be updated to the latest zrepl release immediately.
    This includes breaking changes between zrepl versions.
-   If that bothers you, use the `dnf versionlock plugin <https://dnf-plugins-core.readthedocs.io/en/latest/versionlock.html>`_ to pin the version of zrepl on your system.
+   If that bothers you, use the `dnf versionlock plugin <https://dnf-plugins-core.readthedocs.io/en/latest/versionlock.html>`_ or ``zypper addlock zrepl`` to pin the version of zrepl on your system.
+
+
+
+Fedora / AlmaLinux / Rocky Linux / RHEL
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+For ``dnf``/``yum``-based distributions, copy-paste the following snippet:
+
+.. code-block:: bash
+
+    rpmkeys --import 'https://zrepl.cschwarz.com/rpm/rpm-key.asc'
+    cat > /etc/yum.repos.d/zrepl.repo <<EOF
+    [zrepl]
+    name = zrepl
+    baseurl = https://zrepl.cschwarz.com/rpm/repo
+    gpgkey = https://zrepl.cschwarz.com/rpm/rpm-key.asc
+    repo_gpgcheck = 1
+    EOF
+    dnf install zrepl
+    # Or if you're on an older system:
+    # yum install zrepl
+
+You will be asked by dnf to verify repository metadata (``repo_gpgcheck``).
+There is no way to automate that prompt.
+
+openSUSE
+^^^^^^^^
+
+For SUSE-based distributions that use ``zypper``, copy-paste the following snippet:
+
+.. code-block:: bash
+
+    rpmkeys --import 'https://zrepl.cschwarz.com/rpm/rpm-key.asc'
+    zypper ar --check --gpgcheck-strict --refresh https://zrepl.cschwarz.com/rpm/repo zrepl
+    zypper install zrepl
+

docs/pr.rst

@@ -15,3 +15,5 @@ Talks & Presentations
   `Event <https://wiki.freebsd.org/DevSummit/201709>`__
   )
 
+  * Note: The remarks on ``keep_bookmarks`` are irrelevant as of zrepl 0.1 which introduced the zrepl-managed replication cursor bookmark.
+    Read the `Overview <overview-how-replication-works>`_ section to learn more.

docs/publish.sh

@@ -1,10 +1,10 @@
 #!/bin/bash
-set -eo pipefail
-
+set -euo pipefail
 
 NON_INTERACTIVE=false
 DO_CLONE=false
-while getopts "ca" arg; do
+PUSH=false
+while getopts "caP" arg; do
     case "$arg" in
         "a")
             NON_INTERACTIVE=true
@@ -12,8 +12,11 @@ while getopts "ca" arg; do
         "c")
             DO_CLONE=true
             ;;
+        "P")
+            PUSH=true
+            ;;
         *)
-            echo invalid option
+            echo "invalid option '-$arg'"
             exit 1
             ;;
     esac
@@ -27,13 +30,8 @@ checkout_repo_msg() {
     echo "clone ${GHPAGESREPO} to ${PUBLICDIR}:"
 }
 
-exit_msg() {
-    echo "error, exiting..."
-}
-trap exit_msg EXIT
-
-if ! type sphinx-versioning >/dev/null; then
-    echo "install sphinx-versioning and come back"
+if ! type sphinx-multiversion >/dev/null; then
+    echo "install sphinx-multiversion and come back"
     exit 1
 fi
 
@@ -71,32 +69,39 @@ git reset --hard origin/master
 
 echo "cleaning GitHub pages repo"
 git rm -rf .
+cat > .gitignore <<EOF
+**/.doctrees
+EOF
 
 popd
 
 echo "building site"
 
-flags="$(python3 gen-sphinx-versioning-flags.py)"
-set -e
-sphinx-versioning build \
-   $flags \
-   docs ./public_git \
-   -- -c sphinxconf # older conf.py throw errors because they used
-                    # version = subprocess.show_output(["git", "describe"])
-                    # which fails when building with sphinxcontrib-versioning
-set +e
+python3 run-sphinx-multiversion.py . ./public_git
+
 
 CURRENT_COMMIT=$(git rev-parse HEAD)
 git status --porcelain
 if [[ "$(git status --porcelain)" != "" ]]; then
     CURRENT_COMMIT="${CURRENT_COMMIT}(dirty)"
 fi
-COMMIT_MSG="sphinx-versioning render from publish.sh - $(date -u) - ${CURRENT_COMMIT}"
+COMMIT_MSG="render from publish.sh - $(date -u) - ${CURRENT_COMMIT}"
 
 pushd "$PUBLICDIR"
 
 echo "adding and commiting all changes in GitHub pages repo"
+git add .gitignore
 git add -A
-git commit -m "$COMMIT_MSG"
-git push origin master
+if [ "$(git status --porcelain)" != "" ]; then
+    git commit -m "$COMMIT_MSG"
+else
+    echo "nothing to commit"
+fi
+
+if $PUSH; then
+    echo "pushing to GitHub pages repo"
+    git push origin master
+else
+    echo "not pushing to GitHub pages repo, set -P flag to push"
+fi
 

docs/quickstart.rst

@@ -33,6 +33,7 @@ Keep the :ref:`full config documentation <configuration_toc>` handy if a config
 
    quickstart/continuous_server_backup
    quickstart/backup_to_external_disk
+   quickstart/fan_out_replication
 
 Use ``zrepl configcheck`` to validate your configuration.
 No output indicates that everything is fine.
@@ -51,6 +52,19 @@ We hope that you have found a configuration that fits your use case.
 Use ``zrepl configcheck`` once again to make sure the config is correct (output indicates that everything is fine).
 Then restart the zrepl daemon on all systems involved in the replication, likely using ``service zrepl restart`` or ``systemctl restart zrepl``.
 
+.. WARNING::
+
+   Please :ref:`read up carefully <prune>` on the pruning rules before applying the config.
+   In particular, note that most example configs apply to all snapshots, not just zrepl-created snapshots.
+   Use the following keep rule on sender and receiver to prevent this:
+
+   ::
+      
+      - type: regex
+        negate: true
+        regex: "^zrepl_.*" # <- the 'prefix' specified in snapshotting.prefix
+
+
 Watch it Work
 =============
 

docs/quickstart/backup_to_external_disk.rst

@@ -13,7 +13,7 @@ Thus, we only keep one hour worth of high-resolution snapshots, then fade them o
 
 At the end of each work day, we connect our external disk that serves as our workstation's local offline backup.
 We want zrepl to inspect the filesystems and snapshots on the external pool, figure out which snapshots were created since the last time we connected the external disk, and use incremental replication to efficiently mirror our workstation to our backup disk.
-Afterwards, we want to clean up old snapshots on the backup pool: we want to keep all snapshots younger than one hour, 24 for each hor of the first day, then 360 daily backups.
+Afterwards, we want to clean up old snapshots on the backup pool: we want to keep all snapshots younger than one hour, 24 for each hour of the first day, then 360 daily backups.
 
 A few additional requirements:
 
@@ -31,6 +31,19 @@ A few additional requirements:
 The following config snippet implements the setup described above.
 You will likely want to customize some aspects mentioned in the top comment in the file.
 
-.. literalinclude:: ../../config/samples/quickstart_backup_to_external_disk.yml
+.. literalinclude:: ../../internal/config/samples/quickstart_backup_to_external_disk.yml
+
+
+Offline Backups with two (or more) External Disks
+-------------------------------------------------
+
+It can be desirable to have multiple disk-based backups of the same machine.
+To accomplish this,
+
+* create one zpool per external HDD, each with a unique name, and
+* define a pair of ``push`` and ``sink`` job **for each** of these zpools, each with a unique ``name``, ``listener_name``, and ``root_fs``.
+
+The unique names ensure that the jobs don't step on each others' toes when managing :ref:`zrepl's ZFS abstractions <zrepl-zfs-abstractions>` .
+
 
 :ref:`Click here <quickstart-apply-config>` to go back to the quickstart guide.

docs/quickstart/continuous_server_backup.rst

@@ -9,13 +9,13 @@ This config example shows how we can backup our ZFS-based server to another mach
 
 * Production server ``prod`` with filesystems to back up:
 
-  * ``zroot/var/db``
-  * ``zroot/usr/home`` and all its child filesystems
-  * **except** ``zroot/usr/home/paranoid`` belonging to a user doing backups themselves
+  * The entire pool ``zroot``
+  * except ``zroot/var/tmp`` and all child datasets of it
+  * and except ``zroot/usr/home/paranoid`` which belongs to a user doing backups themselves.
 
-* Backup server ``backups`` with
+* Backup server ``backups`` with a dataset sub-tree for use by zrepl:
 
-  * Filesystem ``storage/zrepl/sink/prod`` + children dedicated to backups of ``prod``
+  * In our example, that will be ``storage/zrepl/sink/prod``.
 
 Our backup solution should fulfill the following requirements:
 
@@ -77,7 +77,7 @@ Configure server ``prod``
 
 We define a **push job** named ``prod_to_backups`` in ``/etc/zrepl/zrepl.yml`` on host ``prod`` :
 
-.. literalinclude:: ../../config/samples/quickstart_continuous_server_backup_sender.yml
+.. literalinclude:: ../../internal/config/samples/quickstart_continuous_server_backup_sender.yml
 
 .. _tutorial-configure-prod:
 
@@ -86,7 +86,7 @@ Configure server ``backups``
 
 We define a corresponding **sink job** named ``sink`` in ``/etc/zrepl/zrepl.yml`` on host ``backups`` :
 
-.. literalinclude:: ../../config/samples/quickstart_continuous_server_backup_receiver.yml
+.. literalinclude:: ../../internal/config/samples/quickstart_continuous_server_backup_receiver.yml
 
 Go Back To Quickstart Guide
 ---------------------------

docs/quickstart/fan_out_replication.rst

@@ -0,0 +1,93 @@
+.. include:: ../global.rst.inc
+
+.. _quickstart-fan-out-replication:
+
+Fan-out replication
+===================
+
+This quick-start example demonstrates how to implement a fan-out replication setup where datasets on a server (A) are replicated to multiple targets (B, C, etc.).
+
+This example uses multiple ``source`` jobs on server A and ``pull`` jobs on the target servers.
+
+.. WARNING::
+
+   Before implementing this setup, please see the caveats listed in the :ref:`fan-out replication configuration overview <fan-out-replication>`.
+
+Overview
+--------
+
+On the source server (A), there should be:
+
+* A ``snap`` job
+
+  * Creates the snapshots
+  * Handles the pruning of snapshots
+
+* A ``source`` job for target B
+
+  * Accepts connections from server B and B only
+
+* Further ``source`` jobs for each additional target (C, D, etc.)
+
+  * Listens on a unique port
+  * Only accepts connections from the specific target
+
+On each target server, there should be:
+
+* A ``pull`` job that connects to the corresponding ``source`` job on A
+
+  * ``prune_sender`` should keep all snapshots since A's ``snap`` job handles the pruning
+  * ``prune_receiver`` can be configured as appropriate on each target server
+
+Generate TLS Certificates
+-------------------------
+
+Mutual TLS via the :ref:`TLS client authentication transport <transport-tcp+tlsclientauth>` can be used to secure the connections between the servers. In this example, a self-signed certificate is created for each server without setting up a CA.
+
+.. code-block:: bash
+
+    source=a.example.com
+    targets=(
+        b.example.com
+        c.example.com
+        # ...
+    )
+
+    for server in "${source}" "${targets[@]}"; do
+        openssl req -x509 -sha256 -nodes \
+            -newkey rsa:4096 \
+            -days 365 \
+            -keyout "${server}.key" \
+            -out "${server}.crt" \
+            -addext "subjectAltName = DNS:${server}" \
+            -subj "/CN=${server}"
+    done
+
+    # Distribute each host's keypair
+    for server in "${source}" "${targets[@]}"; do
+        ssh root@"${server}" mkdir /etc/zrepl
+        scp "${server}".{crt,key} root@"${server}":/etc/zrepl/
+    done
+
+    # Distribute target certificates to the source
+    scp "${targets[@]/%/.crt}" root@"${source}":/etc/zrepl/
+
+    # Distribute source certificate to the targets
+    for server in "${targets[@]}"; do
+        scp "${source}.crt" root@"${server}":/etc/zrepl/
+    done
+
+Configure source server A
+-------------------------
+
+.. literalinclude:: ../../internal/config/samples/quickstart_fan_out_replication_source.yml
+
+Configure each target server
+----------------------------
+
+.. literalinclude:: ../../internal/config/samples/quickstart_fan_out_replication_target.yml
+
+Go Back To Quickstart Guide
+---------------------------
+
+:ref:`Click here <quickstart-apply-config>` to go back to the quickstart guide.

docs/requirements.txt

@@ -1,30 +1,24 @@
-alabaster==0.7.12
-attrs==19.1.0
-Babel==2.7.0
-certifi==2019.6.16
-chardet==3.0.4
-Click==7.0
-colorclass==2.2.0
-docutils==0.15.2
-idna==2.8
-imagesize==1.1.0
-Jinja2==2.10.1
-MarkupSafe==1.1.1
-packaging==19.1
-Pygments==2.4.2
-pyparsing==2.4.2
-pytz==2019.2
-requests==2.22.0
-six==1.12.0
-snowballstemmer==1.9.1
-Sphinx==1.8.5
-sphinx-rtd-theme==0.4.3
-sphinxcontrib-applehelp==1.0.1
-sphinxcontrib-devhelp==1.0.1
-sphinxcontrib-htmlhelp==1.0.2
+alabaster==0.7.13
+Babel==2.12.1
+certifi==2023.7.22
+charset-normalizer==3.2.0
+docutils==0.18.1
+idna==3.4
+imagesize==1.4.1
+Jinja2==3.1.2
+MarkupSafe==2.1.3
+packaging==23.1
+Pygments==2.16.1
+requests==2.31.0
+snowballstemmer==2.2.0
+Sphinx==7.2.5
+sphinx-multiversion @ git+https://github.com/zrepl/sphinx-multiversion/@52c915d7ad898d9641ec48c8bbccb7d4f079db93
+sphinx-rtd-theme==1.3.0
+sphinxcontrib-applehelp==1.0.7
+sphinxcontrib-devhelp==1.0.5
+sphinxcontrib-htmlhelp==2.0.4
+sphinxcontrib-jquery==4.1
 sphinxcontrib-jsmath==1.0.1
-sphinxcontrib-qthelp==1.0.2
-sphinxcontrib-serializinghtml==1.1.3
--e git://github.com/rwblair/sphinxcontrib-versioning.git@7e3885a389a809e17ea55261316b7b0e98dbf98f#egg=sphinxcontrib-versioning
-sphinxcontrib-websupport==1.1.2
-urllib3==1.25.3
+sphinxcontrib-qthelp==1.0.6
+sphinxcontrib-serializinghtml==1.1.9
+urllib3==2.0.4

docs/run-sphinx-multiversion.py

@@ -1,7 +1,15 @@
 #!/usr/bin/env python3
 
+from pathlib import Path
 import subprocess
 import re
+import argparse
+import distutils
+
+argparser = argparse.ArgumentParser()
+argparser.add_argument("docsroot")
+argparser.add_argument("outdir")
+args = argparser.parse_args()
 
 output = subprocess.run(["git", "tag", "-l"], capture_output=True, check=True, text=True)
 tagRE = re.compile(r"^v(?P<major>\d+)\.(?P<minor>\d+)\.(?P<patch>\d+)(-rc(?P<rc>\d+))?$")
@@ -49,26 +57,16 @@ for (mm, l) in by_major_minor.items():
     latest_by_major_minor.append(l[-1])
 latest_by_major_minor.sort(key=lambda tag: (tag.major, tag.minor))
 
-# print(by_major_minor)
-# print(latest_by_major_minor)
-
-cmdline = []
-
-for latest_patch in latest_by_major_minor:
-    cmdline.append("--whitelist-tags")
-    cmdline.append(f"^{re.escape(latest_patch.orig)}$")
-
-# we want flexibility to update docs for the latest stable release
-# => we have a branch for that, called `stable` which we move manually
-# TODO: in the future, have f"stable-{latest_by_major_minor[-1]}"
-default_version = "stable"
-cmdline.extend(["--whitelist-branches", default_version])
-
-cmdline.extend(["--root-ref", f"{default_version}"])
-cmdline.extend(["--banner-main-ref", f"{default_version}"])
-cmdline.extend(["--show-banner"])
-cmdline.extend(["--sort", "semver"])
-
-cmdline.extend(["--whitelist-branches", "master"])
-
-print(" ".join(cmdline))
+cmdline = [
+    "sphinx-multiversion",
+    "-D", "smv_tag_whitelist=^({})$".format("|".join([re.escape(tag.orig) for tag in latest_by_major_minor])),
+    "-D", "smv_branch_whitelist=^(master|stable)$",
+    "-D", "smv_remote_whitelist=^.*$",
+    "-D", "smv_latest_version=stable",
+    "-D", r"smv_released_pattern=^refs/(tags|heads|remotes/[^/]+)/(?!master).*$", # treat everything except master as released, that way, the banner message makes sense
+    # "--dump-metadata", # for debugging
+    args.docsroot,
+    args.outdir,
+]
+print(cmdline)
+subprocess.run(cmdline, check=True)

docs/sphinxconf/conf.py

@@ -1,182 +0,0 @@
-#!/usr/bin/env python3
-# -*- coding: utf-8 -*-
-#
-# zrepl documentation build configuration file, created by
-# sphinx-quickstart on Wed Nov  8 22:28:10 2017.
-#
-# This file is execfile()d with the current directory set to its
-# containing dir.
-#
-# Note that not all possible configuration values are present in this
-# autogenerated file.
-#
-# All configuration values have a default; values that are commented out
-# serve to show the default.
-
-# If extensions (or modules to document with autodoc) are in another directory,
-# add these directories to sys.path here. If the directory is relative to the
-# documentation root, use os.path.abspath to make it absolute, like shown here.
-#
-# import os
-# import sys
-# sys.path.insert(0, os.path.abspath('.'))
-
-
-# -- General configuration ------------------------------------------------
-
-# If your documentation needs a minimal Sphinx version, state it here.
-#
-# needs_sphinx = '1.0'
-
-# Add any Sphinx extension module names here, as strings. They can be
-# extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
-# ones.
-extensions = ['sphinx.ext.todo',
-    'sphinx.ext.githubpages',
-    'sphinx.ext.extlinks']
-
-suppress_warnings = ['image.nonlocal_uri']
-
-# Add any paths that contain templates here, relative to this directory.
-templates_path = ['../_templates']
-
-# The suffix(es) of source filenames.
-# You can specify multiple suffix as a list of string:
-#
-# source_suffix = ['.rst', '.md']
-source_suffix = '.rst'
-
-# The master toctree document.
-master_doc = 'index'
-
-# General information about the project.
-project = 'zrepl'
-copyright = '2017-2019, Christian Schwarz'
-author = 'Christian Schwarz'
-
-# The version info for the project you're documenting, acts as replacement for
-# |version| and |release|, also used in various other places throughout the
-# built documents.
-#
-# The short X.Y version.
-#version = set by sphinxcontrib-versioning
-# The full version, including alpha/beta/rc tags.
-#release = version
-
-# The language for content autogenerated by Sphinx. Refer to documentation
-# for a list of supported languages.
-#
-# This is also used if you do content translation via gettext catalogs.
-# Usually you set "language" from the command line for these cases.
-language = None
-
-# List of patterns, relative to source directory, that match files and
-# directories to ignore when looking for source files.
-# This patterns also effect to html_static_path and html_extra_path
-exclude_patterns = ['_build', 'Thumbs.db', '.DS_Store']
-
-# The name of the Pygments (syntax highlighting) style to use.
-pygments_style = 'sphinx'
-
-# If true, `todo` and `todoList` produce output, else they produce nothing.
-todo_include_todos = True
-
-
-# -- Options for HTML output ----------------------------------------------
-
-# The theme to use for HTML and HTML Help pages.  See the documentation for
-# a list of builtin themes.
-#
-html_theme = 'sphinx_rtd_theme'
-
-# Theme options are theme-specific and customize the look and feel of a theme
-# further.  For a list of options available for each theme, see the
-# documentation.
-#
-# html_theme_options = {}
-
-# Add any paths that contain custom static files (such as style sheets) here,
-# relative to this directory. They are copied after the builtin static files,
-# so a file named "default.css" will overwrite the builtin "default.css".
-html_static_path = ['../_static']
-
-
-html_logo = '../_static/zrepl.svg'
-
-html_context = {
-  # https://github.com/rtfd/sphinx_rtd_theme/issues/205
-  # Add 'Edit on Github' link instead of 'View page source'
-  "display_github": True, 
-  "github_user": "zrepl",
-  "github_repo": "zrepl",
-  "github_version": "master",
-  "conf_py_path": "/docs/",
-  "source_suffix": source_suffix,
-}
-
-# -- Options for HTMLHelp output ------------------------------------------
-
-# Output file base name for HTML help builder.
-htmlhelp_basename = 'zrepldoc'
-
-
-# -- Options for LaTeX output ---------------------------------------------
-
-latex_elements = {
-    # The paper size ('letterpaper' or 'a4paper').
-    #
-    # 'papersize': 'letterpaper',
-
-    # The font size ('10pt', '11pt' or '12pt').
-    #
-    # 'pointsize': '10pt',
-
-    # Additional stuff for the LaTeX preamble.
-    #
-    # 'preamble': '',
-
-    # Latex figure (float) alignment
-    #
-    # 'figure_align': 'htbp',
-}
-
-# Grouping the document tree into LaTeX files. List of tuples
-# (source start file, target name, title,
-#  author, documentclass [howto, manual, or own class]).
-latex_documents = [
-    (master_doc, 'zrepl.tex', 'zrepl Documentation',
-     'Christian Schwarz', 'manual'),
-]
-
-
-# -- Options for manual page output ---------------------------------------
-
-# One entry per manual page. List of tuples
-# (source start file, name, description, authors, manual section).
-man_pages = [
-    (master_doc, 'zrepl', 'zrepl Documentation',
-     [author], 1)
-]
-
-
-# -- Options for Texinfo output -------------------------------------------
-
-# Grouping the document tree into Texinfo files. List of tuples
-# (source start file, target name, title, author,
-#  dir menu entry, description, category)
-texinfo_documents = [
-    (master_doc, 'zrepl', 'zrepl Documentation',
-     author, 'zrepl', 'One line description of project.',
-     'Miscellaneous'),
-]
-
-
-# -- Options for the extlinks extension -----------------------------------
-# http://www.sphinx-doc.org/en/stable/ext/extlinks.html
-extlinks = {
-    'issue':('https://github.com/zrepl/zrepl/issues/%s', 'issue #'),
-    'repomasterlink':('https://github.com/zrepl/zrepl/blob/master/%s', ''),
-    'sampleconf':('https://github.com/zrepl/zrepl/blob/master/config/samples%s', 'config/samples'),
-    'commit':('https://github.com/zrepl/zrepl/commit/%s', 'commit '),
-        }
-

docs/supporters.rst

@@ -32,6 +32,10 @@ We would like to thank the following people and organizations for supporting zre
 
    <div class="fa fa-code" style="width: 1em;"></div>
 
+* |supporter-gold| `Hostsharing eG – die Hosting-Genossenschaft <https://www.hostsharing.net/>`_
+* |supporter-std| `Max Christian Pohle <https://coderonline.de>`_
+* |supporter-gold| Prominic.NET, Inc.
+* |supporter-std| Torsten Blum
 * |supporter-gold| Cyberiada GmbH
 * |supporter-std| `Gordon Schulz <https://github.com/azmodude>`_
 * |supporter-std| `@jwittlincohen <https://github.com/jwittlincohen>`_

docs/usage.rst

@@ -26,7 +26,7 @@ CLI Overview
     * - ``zrepl daemon``
       - run the daemon, required for all zrepl functionality
     * - ``zrepl status``
-      - show job activity, or with ``--raw`` for JSON output
+      - show job activity, or with ``--mode raw`` for JSON output
     * - ``zrepl stdinserver``
       - see :ref:`transport-ssh+stdinserver`
     * - ``zrepl signal wakeup JOB``
@@ -78,3 +78,73 @@ Systemd Unit File
 A systemd service definition template is available in :repomasterlink:`dist/systemd`.
 Note that some of the options only work on recent versions of systemd.
 Any help & improvements are very welcome, see :issue:`145`.
+
+
+
+============
+Ops Runbooks
+============
+
+
+.. toctree::
+
+   usage/runbooks/migrating_sending_side_to_new_zpool.rst
+
+
+.. _usage-platform-tests:
+
+==============
+Platform Tests
+==============
+
+Along with the main ``zrepl`` binary, we release the ``platformtest`` binaries.
+The zrepl platform tests are an integration test suite that is complementary to the pure Go unit tests.
+Any test that needs to interact with ZFS is a platform test.
+
+The platform need to run as root.
+For each test, we create a fresh dummy zpool backed by a file-based vdev.
+The file path, and a root mountpoint for the dummy zpool, must be specified on the command line:
+
+::
+
+   mkdir -p /tmp/zreplplatformtest
+   ./platformtest \
+       -poolname 'zreplplatformtest' \  # <- name must contain zreplplatformtest
+       -imagepath /tmp/zreplplatformtest.img \ # <- zrepl will create the file
+       -mountpoint /tmp/zreplplatformtest # <- must exist
+
+
+.. WARNING::
+
+   ``platformtest`` will unconditionally overwrite the file at `imagepath`
+   and unconditionally ``zpool destroy $poolname``.
+   So, don't use a production poolname, and consider running the test in a VM.
+   It'll be a lot faster as well because the underlying operations, ``zfs list`` in particular, will be faster.
+
+
+While the platformtests are running, there will be a log of log output.
+After all tests have run, it prints a summary with a list of tests, grouped by result type (success, failure, skipped):
+
+::
+
+   PASSING TESTS:
+     github.com/zrepl/zrepl/platformtest/tests.BatchDestroy
+     github.com/zrepl/zrepl/platformtest/tests.CreateReplicationCursor
+     github.com/zrepl/zrepl/platformtest/tests.GetNonexistent
+     github.com/zrepl/zrepl/platformtest/tests.HoldsWork
+     ...
+     github.com/zrepl/zrepl/platformtest/tests.SendStreamNonEOFReadErrorHandling
+     github.com/zrepl/zrepl/platformtest/tests.UndestroyableSnapshotParsing
+   SKIPPED TESTS:
+     github.com/zrepl/zrepl/platformtest/tests.SendArgsValidationEncryptedSendOfUnencryptedDatasetForbidden__EncryptionSupported_false
+   FAILED TESTS: []
+
+
+If there is a failure, or a skipped test that you believe should be passing, re-run the test suite, capture stderr & stdout to a text file, and create an issue on GitHub.
+
+To run a specific test case, or a subset of tests matched by regex, use the ``-run REGEX`` command line flag.
+
+To stop test execution at the first failing test, and prevent cleanup of the dummy zpool, use the ``-failure.stop-and-keep-pool`` flag.
+
+To build the platformtests yourself, use ``make test-platform-bin``.
+There's also the ``make test-platform`` target to run the platform tests with a default command line.

docs/usage/runbooks/migrating_sending_side_to_new_zpool.rst

@@ -0,0 +1,36 @@
+
+Migrating Sending Side
+~~~~~~~~~~~~~~~~~~~~~~
+
+**Objective**:
+Move sending-side zpool to new hardware.
+Make the move fully transparent to the sending-side jobs.
+After the move is done, all sending-side zrepl jobs should continue to work as if the move had not happened.
+In particular, incremental replication should be able to pick up where it left before the move.
+
+Suppose we want to migrate all data from one zpool ``oldpool`` to another zpool ``newpool``.
+A possible reason might be that we want to change RAID levels, ``ashift``, or just migrate over to next-gen hardware.
+
+If the pool names are different, zrepl's matching between sender and receiver dataset will break becase the receive-side dataset names contain ``oldpool``.
+To avoid this, we will need the name of the new pool to match that of the old pool.
+The following steps will accomplish this:
+
+1. Stop zrepl.
+2. Create the new pool: ``zpool create newpool ...``
+3. Take a snapshot of the old pool so that you have something that you can ``zfs send``.
+   For example, run ``zfs snapshot -r oldpool@migration_oldpool_newpool``.
+4. Send all of the oldpool's datasets to the new pool:
+   ``zfs send -R oldpool@migration_oldpool_newpool | zfs recv -F newpool``
+5. Export the old pool: ``zpool export oldpool``
+6. Export the new pool: ``zpool export newpool``
+7. (Optional) Change the name of the old pool to something that does not conflict with the new pool.
+   We are going to use the name ``oldoldpool`` in this example.
+   Use ``zpool import`` with no arguments to see the pool id.
+   Then ``zpool import <id> oldoldpool && zpool export oldoldpool``.
+8. Import the new pool, while changing the name to match the old pool: ``zpool import newpool oldpool``
+9. Start zrepl again and wake up the relevant jobs.
+10. Use ``zrepl status`` or you monitoring to ensure that replication works.
+    The best test is an end-to-end test where you write some junk data on a sender dataset and wait until a snapshot with that data appears on the receiving side.
+11. Once you are confident that replication is working, you may dispose of the old pool.
+
+Note that, depending on pruning rules, it will not be possible to switch back to the old pool seamlessly, i.e., without a full re-replication.

go.mod

@@ -1,42 +1,252 @@
 module github.com/zrepl/zrepl
 
-go 1.12
+go 1.24.0
+
+tool (
+	github.com/alvaroloes/enumer
+	github.com/golangci/golangci-lint/cmd/golangci-lint
+	github.com/wadey/gocovmerge
+	golang.org/x/tools/cmd/goimports
+	golang.org/x/tools/cmd/stringer
+	google.golang.org/grpc/cmd/protoc-gen-go-grpc
+	google.golang.org/protobuf/cmd/protoc-gen-go
+)
 
 require (
-	github.com/fatih/color v1.7.0
-	github.com/gdamore/tcell v1.2.0
+	github.com/bits-and-blooms/bitset v1.14.3
+	github.com/fatih/color v1.18.0
+	github.com/gdamore/tcell/v2 v2.7.4
 	github.com/gitchander/permutation v0.0.0-20181107151852-9e56b92e9909
-	github.com/go-logfmt/logfmt v0.4.0
-	github.com/go-sql-driver/mysql v1.4.1-0.20190907122137-b2c03bcae3d4
-	github.com/golang/protobuf v1.3.2
-	github.com/google/uuid v1.1.1
+	github.com/go-logfmt/logfmt v0.5.1
+	github.com/go-playground/validator v9.31.0+incompatible
+	github.com/go-playground/validator/v10 v10.4.1
+	github.com/go-sql-driver/mysql v1.7.1
+	github.com/google/uuid v1.6.0
 	github.com/jinzhu/copier v0.0.0-20170922082739-db4671f3a9b8
-	github.com/kr/pretty v0.1.0
-	github.com/lib/pq v1.2.0
-	github.com/mattn/go-colorable v0.1.4 // indirect
-	github.com/mattn/go-isatty v0.0.8
-	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // // go1.12 mod tidy adds this dependency as 'indirect', but go1.13 mod tidy removes it if the trailing comment is 'indirect' => add this comment to make the build work without changing go.mod on both go1.12 and go1.13
-	github.com/modern-go/reflect2 v1.0.1 // go1.12 mod tidy adds this dependency as 'indirect', but go1.13 mod tidy removes it if the trailing comment is 'indirect' => add this comment to make the build work without changing go.mod on both go1.12 and go1.13
+	github.com/juju/ratelimit v1.0.1
+	github.com/kr/pretty v0.3.1
+	github.com/lib/pq v1.10.9
+	github.com/mattn/go-isatty v0.0.20
 	github.com/montanaflynn/stats v0.5.0
-	github.com/onsi/ginkgo v1.10.2 // indirect
-	github.com/onsi/gomega v1.7.0 // indirect
-	github.com/pkg/errors v0.8.1
+	github.com/pkg/errors v0.9.1
 	github.com/pkg/profile v1.2.1
 	github.com/problame/go-netssh v0.0.0-20200601114649-26439f9f0dc5
-	github.com/prometheus/client_golang v1.2.1
-	github.com/prometheus/common v0.7.0
-	github.com/sergi/go-diff v1.0.1-0.20180205163309-da645544ed44 // go1.12 thinks it needs this
-	github.com/spf13/cobra v0.0.2
-	github.com/spf13/pflag v1.0.5
-	github.com/stretchr/testify v1.4.0
-	github.com/willf/bitset v1.1.10
+	github.com/prometheus/client_golang v1.20.3
+	github.com/robfig/cron/v3 v3.0.1
+	github.com/spf13/cobra v1.9.1
+	github.com/spf13/pflag v1.0.6
+	github.com/stretchr/testify v1.10.0
 	github.com/yudai/gojsondiff v0.0.0-20170107030110-7b1b7adf999d
-	github.com/yudai/golcs v0.0.0-20170316035057-ecda9a501e82 // go1.12 thinks it needs this
 	github.com/zrepl/yaml-config v0.0.0-20191220194647-cbb6b0cf4bdd
-	golang.org/x/net v0.0.0-20190613194153-d28f0bde5980
-	golang.org/x/sync v0.0.0-20190423024810-112230192c58
-	golang.org/x/sys v0.0.0-20191026070338-33540a1f6037
-	golang.org/x/tools v0.0.0-20190206041539-40960b6deb8e
-	gonum.org/v1/gonum v0.7.0 // indirect
-	google.golang.org/grpc v1.17.0
+	golang.org/x/net v0.38.0
+	golang.org/x/sync v0.12.0
+	golang.org/x/sys v0.31.0
+	golang.org/x/tools v0.31.0
+	google.golang.org/grpc v1.70.0
+	google.golang.org/protobuf v1.36.10
+)
+
+require (
+	4d63.com/gocheckcompilerdirectives v1.3.0 // indirect
+	4d63.com/gochecknoglobals v0.2.2 // indirect
+	github.com/4meepo/tagalign v1.4.2 // indirect
+	github.com/Abirdcfly/dupword v0.1.3 // indirect
+	github.com/Antonboom/errname v1.0.0 // indirect
+	github.com/Antonboom/nilnil v1.0.1 // indirect
+	github.com/Antonboom/testifylint v1.5.2 // indirect
+	github.com/BurntSushi/toml v1.4.1-0.20240526193622-a339e1f7089c // indirect
+	github.com/Crocmagnon/fatcontext v0.7.1 // indirect
+	github.com/Djarvur/go-err113 v0.0.0-20210108212216-aea10b59be24 // indirect
+	github.com/GaijinEntertainment/go-exhaustruct/v3 v3.3.1 // indirect
+	github.com/Masterminds/semver/v3 v3.3.0 // indirect
+	github.com/OpenPeeDeeP/depguard/v2 v2.2.1 // indirect
+	github.com/alecthomas/go-check-sumtype v0.3.1 // indirect
+	github.com/alexkohler/nakedret/v2 v2.0.5 // indirect
+	github.com/alexkohler/prealloc v1.0.0 // indirect
+	github.com/alingse/asasalint v0.0.11 // indirect
+	github.com/alingse/nilnesserr v0.1.2 // indirect
+	github.com/alvaroloes/enumer v1.1.2 // indirect
+	github.com/ashanbrown/forbidigo v1.6.0 // indirect
+	github.com/ashanbrown/makezero v1.2.0 // indirect
+	github.com/bkielbasa/cyclop v1.2.3 // indirect
+	github.com/blizzy78/varnamelen v0.8.0 // indirect
+	github.com/bombsimon/wsl/v4 v4.5.0 // indirect
+	github.com/breml/bidichk v0.3.2 // indirect
+	github.com/breml/errchkjson v0.4.0 // indirect
+	github.com/butuzov/ireturn v0.3.1 // indirect
+	github.com/butuzov/mirror v1.3.0 // indirect
+	github.com/catenacyber/perfsprint v0.8.2 // indirect
+	github.com/ccojocar/zxcvbn-go v1.0.2 // indirect
+	github.com/charithe/durationcheck v0.0.10 // indirect
+	github.com/chavacava/garif v0.1.0 // indirect
+	github.com/ckaznocha/intrange v0.3.0 // indirect
+	github.com/curioswitch/go-reassign v0.3.0 // indirect
+	github.com/daixiang0/gci v0.13.5 // indirect
+	github.com/denis-tingaikin/go-header v0.5.0 // indirect
+	github.com/ettle/strcase v0.2.0 // indirect
+	github.com/fatih/structtag v1.2.0 // indirect
+	github.com/firefart/nonamedreturns v1.0.5 // indirect
+	github.com/fsnotify/fsnotify v1.5.4 // indirect
+	github.com/fzipp/gocyclo v0.6.0 // indirect
+	github.com/ghostiam/protogetter v0.3.9 // indirect
+	github.com/go-critic/go-critic v0.12.0 // indirect
+	github.com/go-toolsmith/astcast v1.1.0 // indirect
+	github.com/go-toolsmith/astcopy v1.1.0 // indirect
+	github.com/go-toolsmith/astequal v1.2.0 // indirect
+	github.com/go-toolsmith/astfmt v1.1.0 // indirect
+	github.com/go-toolsmith/astp v1.1.0 // indirect
+	github.com/go-toolsmith/strparse v1.1.0 // indirect
+	github.com/go-toolsmith/typep v1.1.0 // indirect
+	github.com/go-viper/mapstructure/v2 v2.2.1 // indirect
+	github.com/go-xmlfmt/xmlfmt v1.1.3 // indirect
+	github.com/gobwas/glob v0.2.3 // indirect
+	github.com/gofrs/flock v0.12.1 // indirect
+	github.com/golangci/dupl v0.0.0-20250308024227-f665c8d69b32 // indirect
+	github.com/golangci/go-printf-func-name v0.1.0 // indirect
+	github.com/golangci/gofmt v0.0.0-20250106114630-d62b90e6713d // indirect
+	github.com/golangci/golangci-lint v1.64.8 // indirect
+	github.com/golangci/misspell v0.6.0 // indirect
+	github.com/golangci/plugin-module-register v0.1.1 // indirect
+	github.com/golangci/revgrep v0.8.0 // indirect
+	github.com/golangci/unconvert v0.0.0-20240309020433-c5143eacb3ed // indirect
+	github.com/google/go-cmp v0.7.0 // indirect
+	github.com/gordonklaus/ineffassign v0.1.0 // indirect
+	github.com/gostaticanalysis/analysisutil v0.7.1 // indirect
+	github.com/gostaticanalysis/comment v1.5.0 // indirect
+	github.com/gostaticanalysis/forcetypeassert v0.2.0 // indirect
+	github.com/gostaticanalysis/nilerr v0.1.1 // indirect
+	github.com/hashicorp/go-immutable-radix/v2 v2.1.0 // indirect
+	github.com/hashicorp/go-version v1.7.0 // indirect
+	github.com/hashicorp/golang-lru/v2 v2.0.7 // indirect
+	github.com/hashicorp/hcl v1.0.0 // indirect
+	github.com/hexops/gotextdiff v1.0.3 // indirect
+	github.com/hpcloud/tail v1.0.0 // indirect
+	github.com/jgautheron/goconst v1.7.1 // indirect
+	github.com/jingyugao/rowserrcheck v1.1.1 // indirect
+	github.com/jjti/go-spancheck v0.6.4 // indirect
+	github.com/julz/importas v0.2.0 // indirect
+	github.com/karamaru-alpha/copyloopvar v1.2.1 // indirect
+	github.com/kisielk/errcheck v1.9.0 // indirect
+	github.com/kkHAIKE/contextcheck v1.1.6 // indirect
+	github.com/klauspost/compress v1.17.9 // indirect
+	github.com/kulti/thelper v0.6.3 // indirect
+	github.com/kunwardeep/paralleltest v1.0.10 // indirect
+	github.com/lasiar/canonicalheader v1.1.2 // indirect
+	github.com/ldez/exptostd v0.4.2 // indirect
+	github.com/ldez/gomoddirectives v0.6.1 // indirect
+	github.com/ldez/grignotin v0.9.0 // indirect
+	github.com/ldez/tagliatelle v0.7.1 // indirect
+	github.com/ldez/usetesting v0.4.2 // indirect
+	github.com/leonklingele/grouper v1.1.2 // indirect
+	github.com/macabu/inamedparam v0.1.3 // indirect
+	github.com/magiconair/properties v1.8.6 // indirect
+	github.com/maratori/testableexamples v1.0.0 // indirect
+	github.com/maratori/testpackage v1.1.1 // indirect
+	github.com/matoous/godox v1.1.0 // indirect
+	github.com/mgechev/revive v1.7.0 // indirect
+	github.com/mitchellh/go-homedir v1.1.0 // indirect
+	github.com/mitchellh/mapstructure v1.5.0 // indirect
+	github.com/moricho/tparallel v0.3.2 // indirect
+	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
+	github.com/nakabonne/nestif v0.3.1 // indirect
+	github.com/nishanths/exhaustive v0.12.0 // indirect
+	github.com/nishanths/predeclared v0.2.2 // indirect
+	github.com/nunnatsa/ginkgolinter v0.19.1 // indirect
+	github.com/olekukonko/tablewriter v0.0.5 // indirect
+	github.com/pascaldekloe/name v0.0.0-20180628100202-0fd16699aae1 // indirect
+	github.com/pelletier/go-toml v1.9.5 // indirect
+	github.com/pelletier/go-toml/v2 v2.2.3 // indirect
+	github.com/polyfloyd/go-errorlint v1.7.1 // indirect
+	github.com/prometheus/common v0.59.1 // indirect
+	github.com/quasilyte/go-ruleguard v0.4.3-0.20240823090925-0fe6f58b47b1 // indirect
+	github.com/quasilyte/go-ruleguard/dsl v0.3.22 // indirect
+	github.com/quasilyte/gogrep v0.5.0 // indirect
+	github.com/quasilyte/regex/syntax v0.0.0-20210819130434-b3f0c404a727 // indirect
+	github.com/quasilyte/stdinfo v0.0.0-20220114132959-f7386bf02567 // indirect
+	github.com/raeperd/recvcheck v0.2.0 // indirect
+	github.com/rogpeppe/go-internal v1.14.1 // indirect
+	github.com/ryancurrah/gomodguard v1.3.5 // indirect
+	github.com/ryanrolds/sqlclosecheck v0.5.1 // indirect
+	github.com/sanposhiho/wastedassign/v2 v2.1.0 // indirect
+	github.com/santhosh-tekuri/jsonschema/v6 v6.0.1 // indirect
+	github.com/sashamelentyev/interfacebloat v1.1.0 // indirect
+	github.com/sashamelentyev/usestdlibvars v1.28.0 // indirect
+	github.com/securego/gosec/v2 v2.22.2 // indirect
+	github.com/sirupsen/logrus v1.9.3 // indirect
+	github.com/sivchari/containedctx v1.0.3 // indirect
+	github.com/sivchari/tenv v1.12.1 // indirect
+	github.com/sonatard/noctx v0.1.0 // indirect
+	github.com/sourcegraph/go-diff v0.7.0 // indirect
+	github.com/spf13/afero v1.12.0 // indirect
+	github.com/spf13/cast v1.5.0 // indirect
+	github.com/spf13/jwalterweatherman v1.1.0 // indirect
+	github.com/spf13/viper v1.12.0 // indirect
+	github.com/ssgreg/nlreturn/v2 v2.2.1 // indirect
+	github.com/stbenjam/no-sprintf-host-port v0.2.0 // indirect
+	github.com/stretchr/objx v0.5.2 // indirect
+	github.com/subosito/gotenv v1.4.1 // indirect
+	github.com/tdakkota/asciicheck v0.4.1 // indirect
+	github.com/tetafro/godot v1.5.0 // indirect
+	github.com/timakin/bodyclose v0.0.0-20241017074812-ed6a65f985e3 // indirect
+	github.com/timonwong/loggercheck v0.10.1 // indirect
+	github.com/tomarrell/wrapcheck/v2 v2.10.0 // indirect
+	github.com/tommy-muehle/go-mnd/v2 v2.5.1 // indirect
+	github.com/ultraware/funlen v0.2.0 // indirect
+	github.com/ultraware/whitespace v0.2.0 // indirect
+	github.com/uudashr/gocognit v1.2.0 // indirect
+	github.com/uudashr/iface v1.3.1 // indirect
+	github.com/wadey/gocovmerge v0.0.0-20160331181800-b5bfa59ec0ad // indirect
+	github.com/xen0n/gosmopolitan v1.2.2 // indirect
+	github.com/yagipy/maintidx v1.0.0 // indirect
+	github.com/yeya24/promlinter v0.3.0 // indirect
+	github.com/ykadowak/zerologlint v0.1.5 // indirect
+	gitlab.com/bosi/decorder v0.4.2 // indirect
+	go-simpler.org/musttag v0.13.0 // indirect
+	go-simpler.org/sloglint v0.9.0 // indirect
+	go.uber.org/atomic v1.7.0 // indirect
+	go.uber.org/automaxprocs v1.6.0 // indirect
+	go.uber.org/multierr v1.6.0 // indirect
+	go.uber.org/zap v1.24.0 // indirect
+	golang.org/x/exp/typeparams v0.0.0-20250210185358-939b2ce775ac // indirect
+	golang.org/x/mod v0.24.0 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20250219182151-9fdb1cabc7b2 // indirect
+	google.golang.org/grpc/cmd/protoc-gen-go-grpc v1.6.0 // indirect
+	gopkg.in/fsnotify.v1 v1.4.7 // indirect
+	gopkg.in/ini.v1 v1.67.0 // indirect
+	gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 // indirect
+	gopkg.in/yaml.v2 v2.4.0 // indirect
+	honnef.co/go/tools v0.6.1 // indirect
+	mvdan.cc/gofumpt v0.7.0 // indirect
+	mvdan.cc/unparam v0.0.0-20240528143540-8a5130ca722f // indirect
+)
+
+require (
+	github.com/beorn7/perks v1.0.1 // indirect
+	github.com/cespare/xxhash/v2 v2.3.0 // indirect
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/ftrvxmtrx/fd v0.0.0-20150925145434-c6d800382fff // indirect
+	github.com/gdamore/encoding v1.0.0 // indirect
+	github.com/go-playground/locales v0.13.0 // indirect
+	github.com/go-playground/universal-translator v0.17.0 // indirect
+	github.com/inconshreveable/mousetrap v1.1.0 // indirect
+	github.com/kr/text v0.2.0 // indirect
+	github.com/leodido/go-urn v1.2.1 // indirect
+	github.com/lucasb-eyer/go-colorful v1.2.0 // indirect
+	github.com/mattn/go-colorable v0.1.14 // indirect
+	github.com/mattn/go-runewidth v0.0.16 // indirect
+	github.com/onsi/ginkgo v1.10.2 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/prometheus/client_model v0.6.1 // indirect
+	github.com/prometheus/procfs v0.15.1 // indirect
+	github.com/rivo/tview v0.0.0-20241103174730-c76f7879f592
+	github.com/rivo/uniseg v0.4.7 // indirect
+	github.com/sergi/go-diff v1.0.1-0.20180205163309-da645544ed44 // indirect; go1.12 thinks it needs this
+	github.com/theckman/goconstraint v1.11.0 // indirect
+	github.com/yudai/golcs v0.0.0-20170316035057-ecda9a501e82 // indirect; go1.12 thinks it needs this
+	github.com/yudai/pp v2.0.1+incompatible // indirect
+	golang.org/x/crypto v0.36.0 // indirect
+	golang.org/x/term v0.30.0 // indirect
+	golang.org/x/text v0.23.0 // indirect
+	gopkg.in/go-playground/assert.v1 v1.2.1 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

internal/cli/cli.go

@@ -8,9 +8,9 @@ import (
 	"github.com/spf13/cobra"
 	"github.com/spf13/pflag"
 
-	"github.com/zrepl/zrepl/daemon/logging/trace"
+	"github.com/zrepl/zrepl/internal/daemon/logging/trace"
 
-	"github.com/zrepl/zrepl/config"
+	"github.com/zrepl/zrepl/internal/config"
 )
 
 var rootArgs struct {

internal/client/configcheck.go

@@ -11,16 +11,17 @@ import (
 	"github.com/spf13/pflag"
 	"github.com/zrepl/yaml-config"
 
-	"github.com/zrepl/zrepl/cli"
-	"github.com/zrepl/zrepl/config"
-	"github.com/zrepl/zrepl/daemon/job"
-	"github.com/zrepl/zrepl/daemon/logging"
-	"github.com/zrepl/zrepl/logger"
+	"github.com/zrepl/zrepl/internal/cli"
+	"github.com/zrepl/zrepl/internal/config"
+	"github.com/zrepl/zrepl/internal/daemon/job"
+	"github.com/zrepl/zrepl/internal/daemon/logging"
+	"github.com/zrepl/zrepl/internal/logger"
 )
 
 var configcheckArgs struct {
 	format        string
 	what          string
+	skipCertCheck bool
 }
 
 var ConfigcheckCmd = &cli.Subcommand{
@@ -29,6 +30,7 @@ var ConfigcheckCmd = &cli.Subcommand{
 	SetupFlags: func(f *pflag.FlagSet) {
 		f.StringVar(&configcheckArgs.format, "format", "", "dump parsed config object [pretty|yaml|json]")
 		f.StringVar(&configcheckArgs.what, "what", "all", "what to print [all|config|jobs|logging]")
+		f.BoolVar(&configcheckArgs.skipCertCheck, "skip-cert-check", false, "skip checking cert files")
 	},
 	Run: func(ctx context.Context, subcommand *cli.Subcommand, args []string) error {
 		formatMap := map[string]func(interface{}){
@@ -56,8 +58,16 @@ var ConfigcheckCmd = &cli.Subcommand{
 		}
 
 		var hadErr bool
+
+		parseFlags := config.ParseFlagsNone
+
+		if configcheckArgs.skipCertCheck {
+			parseFlags |= config.ParseFlagsNoCertCheck
+		}
+
 		// further: try to build jobs
-		confJobs, err := job.JobsFromConfig(subcommand.Config())
+		confJobs, err := job.JobsFromConfig(subcommand.Config(), parseFlags)
+
 		if err != nil {
 			err := errors.Wrap(err, "cannot build jobs from config")
 			if configcheckArgs.what == "jobs" {

internal/client/migrate.go

@@ -9,12 +9,12 @@ import (
 	"github.com/pkg/errors"
 	"github.com/spf13/pflag"
 
-	"github.com/zrepl/zrepl/daemon/job"
-	"github.com/zrepl/zrepl/endpoint"
-	"github.com/zrepl/zrepl/zfs"
+	"github.com/zrepl/zrepl/internal/daemon/job"
+	"github.com/zrepl/zrepl/internal/endpoint"
+	"github.com/zrepl/zrepl/internal/zfs"
 
-	"github.com/zrepl/zrepl/cli"
-	"github.com/zrepl/zrepl/config"
+	"github.com/zrepl/zrepl/internal/cli"
+	"github.com/zrepl/zrepl/internal/config"
 )
 
 var (
@@ -129,7 +129,7 @@ func doMigrateReplicationCursor(ctx context.Context, sc *cli.Subcommand, args []
 	}
 
 	cfg := sc.Config()
-	jobs, err := job.JobsFromConfig(cfg)
+	jobs, err := job.JobsFromConfig(cfg, config.ParseFlagsNone)
 	if err != nil {
 		fmt.Printf("cannot parse config:\n%s\n\n", err)
 		fmt.Printf("NOTE: this migration was released together with a change in job name requirements.\n")

internal/client/pprof.go

@@ -1,6 +1,6 @@
 package client
 
-import "github.com/zrepl/zrepl/cli"
+import "github.com/zrepl/zrepl/internal/cli"
 
 var PprofCmd = &cli.Subcommand{
 	Use: "pprof",

internal/client/pprof_activity_trace.go

@@ -8,7 +8,7 @@ import (
 
 	"golang.org/x/net/websocket"
 
-	"github.com/zrepl/zrepl/cli"
+	"github.com/zrepl/zrepl/internal/cli"
 )
 
 var pprofActivityTraceCmd = &cli.Subcommand{

internal/client/pprof_listen.go

@@ -6,9 +6,9 @@ import (
 	"log"
 	"os"
 
-	"github.com/zrepl/zrepl/cli"
-	"github.com/zrepl/zrepl/config"
-	"github.com/zrepl/zrepl/daemon"
+	"github.com/zrepl/zrepl/internal/cli"
+	"github.com/zrepl/zrepl/internal/config"
+	"github.com/zrepl/zrepl/internal/daemon"
 )
 
 var pprofListenCmd struct {

internal/client/signal.go

@@ -5,9 +5,9 @@ import (
 
 	"github.com/pkg/errors"
 
-	"github.com/zrepl/zrepl/cli"
-	"github.com/zrepl/zrepl/config"
-	"github.com/zrepl/zrepl/daemon"
+	"github.com/zrepl/zrepl/internal/cli"
+	"github.com/zrepl/zrepl/internal/config"
+	"github.com/zrepl/zrepl/internal/daemon"
 )
 
 var SignalCmd = &cli.Subcommand{

internal/client/status/client/client.go

@@ -0,0 +1,111 @@
+package client
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"io"
+	"net"
+	"net/http"
+
+	"github.com/pkg/errors"
+
+	"github.com/zrepl/zrepl/internal/daemon"
+)
+
+type Client struct {
+	h *http.Client
+}
+
+func New(network, addr string) (*Client, error) {
+	httpc, err := makeControlHttpClient(func(_ context.Context) (net.Conn, error) { return net.Dial(network, addr) })
+	if err != nil {
+		return nil, err
+	}
+	return &Client{httpc}, nil
+}
+
+func (c *Client) Status() (s daemon.Status, _ error) {
+	err := jsonRequestResponse(c.h, daemon.ControlJobEndpointStatus,
+		struct{}{},
+		&s,
+	)
+	return s, err
+}
+
+func (c *Client) StatusRaw() ([]byte, error) {
+	var r json.RawMessage
+	err := jsonRequestResponse(c.h, daemon.ControlJobEndpointStatus, struct{}{}, &r)
+	if err != nil {
+		return nil, err
+	}
+	return r, nil
+}
+
+func (c *Client) signal(job, sig string) error {
+	return jsonRequestResponse(c.h, daemon.ControlJobEndpointSignal,
+		struct {
+			Name string
+			Op   string
+		}{
+			Name: job,
+			Op:   sig,
+		},
+		struct{}{},
+	)
+}
+
+func (c *Client) SignalWakeup(job string) error {
+	return c.signal(job, "wakeup")
+}
+
+func (c *Client) SignalReset(job string) error {
+	return c.signal(job, "reset")
+}
+
+func makeControlHttpClient(dialfunc func(context.Context) (net.Conn, error)) (client *http.Client, err error) {
+	return &http.Client{
+		Transport: &http.Transport{
+			DialContext: func(ctx context.Context, _, _ string) (net.Conn, error) {
+				return dialfunc(ctx)
+			},
+		},
+	}, nil
+}
+
+func jsonRequestResponse(c *http.Client, endpoint string, req interface{}, res interface{}) error {
+	var buf bytes.Buffer
+	encodeErr := json.NewEncoder(&buf).Encode(req)
+	if encodeErr != nil {
+		return encodeErr
+	}
+
+	hreq, err := http.NewRequest("POST", "http://unix"+endpoint, &buf)
+	if err != nil {
+		return err
+	}
+	hreq.Header.Set("Content-Type", "application/json")
+	// Prevent EOF errors when client request frequency and server keepalive close are at the same time.
+	// Found this by watching http.Server.ConnState changes, then found
+	// https://stackoverflow.com/questions/17714494/golang-http-request-results-in-eof-errors-when-making-multiple-requests-successi
+	// Note: The issue seems even more prounounced with local TCP sockets than unix domain sockets. So, I used that for debugging.
+	hreq.Close = true
+	resp, err := c.Do(hreq)
+	if err != nil {
+		return err
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		var msg bytes.Buffer
+		_, _ = io.CopyN(&msg, resp.Body, 4096) // ignore error, just display what we got
+		return errors.Errorf("%s", msg.String())
+	}
+
+	decodeError := json.NewDecoder(resp.Body).Decode(&res)
+	if decodeError != nil {
+		return decodeError
+	}
+
+	return nil
+}

internal/client/status/status.go

@@ -0,0 +1,97 @@
+package status
+
+import (
+	"context"
+	"os"
+	"time"
+
+	"github.com/mattn/go-isatty"
+	"github.com/pkg/errors"
+	"github.com/spf13/pflag"
+
+	"github.com/zrepl/zrepl/internal/cli"
+	"github.com/zrepl/zrepl/internal/client/status/client"
+	"github.com/zrepl/zrepl/internal/config"
+	"github.com/zrepl/zrepl/internal/daemon"
+	"github.com/zrepl/zrepl/internal/util/choices"
+)
+
+type Client interface {
+	Status() (daemon.Status, error)
+	StatusRaw() ([]byte, error)
+	SignalWakeup(job string) error
+	SignalReset(job string) error
+}
+
+type statusFlags struct {
+	Mode  choices.Choices
+	Job   string
+	Delay time.Duration
+}
+
+var statusv2Flags statusFlags
+
+type statusv2Mode int
+
+const (
+	StatusV2ModeInteractive statusv2Mode = 1 + iota
+	StatusV2ModeDump
+	StatusV2ModeRaw
+	StatusV2ModeLegacy
+)
+
+var Subcommand = &cli.Subcommand{
+	Use:   "status",
+	Short: "retrieve & display daemon status information",
+	SetupFlags: func(f *pflag.FlagSet) {
+		statusv2Flags.Mode.Init(
+			"interactive", StatusV2ModeInteractive,
+			"dump", StatusV2ModeDump,
+			"raw", StatusV2ModeRaw,
+			"legacy", StatusV2ModeLegacy,
+		)
+		statusv2Flags.Mode.SetTypeString("mode")
+		statusv2Flags.Mode.SetDefaultValue(StatusV2ModeInteractive)
+		f.Var(&statusv2Flags.Mode, "mode", statusv2Flags.Mode.Usage())
+		f.StringVar(&statusv2Flags.Job, "job", "", "only show specified job (works in \"dump\" and \"interactive\" mode)")
+		f.DurationVarP(&statusv2Flags.Delay, "delay", "d", 1*time.Second, "use -d 3s for 3 seconds delay (minimum delay is 1s)")
+	},
+	Run: func(ctx context.Context, subcommand *cli.Subcommand, args []string) error {
+		return runStatusV2Command(ctx, subcommand.Config(), args)
+	},
+}
+
+func runStatusV2Command(ctx context.Context, config *config.Config, args []string) error {
+
+	c, err := client.New("unix", config.Global.Control.SockPath)
+	if err != nil {
+		return errors.Wrapf(err, "connect to daemon socket at %q", config.Global.Control.SockPath)
+	}
+
+	mode := statusv2Flags.Mode.Value().(statusv2Mode)
+
+	if !isatty.IsTerminal(os.Stdout.Fd()) && mode != StatusV2ModeDump && mode != StatusV2ModeRaw {
+		dumpmode, err := statusv2Flags.Mode.InputForChoice(StatusV2ModeDump)
+		if err != nil {
+			panic(err)
+		}
+		rawmode, err := statusv2Flags.Mode.InputForChoice(StatusV2ModeRaw)
+		if err != nil {
+			panic(err)
+		}
+		return errors.Errorf("error: stdout is not a tty, please use --mode %s or --mode %s", dumpmode, rawmode)
+	}
+
+	switch mode {
+	case StatusV2ModeInteractive:
+		return interactive(c, statusv2Flags)
+	case StatusV2ModeDump:
+		return dump(c, statusv2Flags.Job)
+	case StatusV2ModeRaw:
+		return raw(c)
+	case StatusV2ModeLegacy:
+		return legacy(c, statusv2Flags)
+	default:
+		panic("unreachable")
+	}
+}

internal/client/status/status_dump.go

@@ -0,0 +1,70 @@
+package status
+
+import (
+	"fmt"
+	"os"
+	"strings"
+
+	"github.com/gdamore/tcell/v2"
+	"github.com/mattn/go-isatty"
+	"github.com/pkg/errors"
+
+	"github.com/zrepl/zrepl/internal/client/status/viewmodel"
+)
+
+func dump(c Client, job string) error {
+	s, err := c.Status()
+	if err != nil {
+		return err
+	}
+
+	if job != "" {
+		if _, ok := s.Jobs[job]; !ok {
+			return errors.Errorf("job %q not found", job)
+		}
+	}
+
+	width := (1 << 31) - 1
+	wrap := false
+	hline := strings.Repeat("-", 80)
+	if isatty.IsTerminal(os.Stdout.Fd()) {
+		wrap = true
+		screen, err := tcell.NewScreen()
+		if err != nil {
+			return errors.Wrap(err, "get terminal dimensions")
+		}
+		if err := screen.Init(); err != nil {
+			return errors.Wrap(err, "init screen")
+		}
+		width, _ = screen.Size()
+		screen.Fini()
+		hline = strings.Repeat("-", width)
+	}
+
+	m := viewmodel.New()
+	params := viewmodel.Params{
+		Report:                  s.Jobs,
+		ReportFetchError:        nil,
+		SelectedJob:             nil,
+		FSFilter:                func(s string) bool { return true },
+		DetailViewWidth:         width,
+		DetailViewWrap:          wrap,
+		ShortKeybindingOverview: "",
+	}
+	m.Update(params)
+	for _, j := range m.Jobs() {
+		if job != "" && j.Name() != job {
+			continue
+		}
+		params.SelectedJob = j
+		m.Update(params)
+		fmt.Println(m.SelectedJob().FullDescription())
+		if job != "" {
+			return nil
+		} else {
+			fmt.Println(hline)
+		}
+	}
+
+	return nil
+}

internal/client/status/status_interactive.go

@@ -0,0 +1,344 @@
+package status
+
+import (
+	"fmt"
+	"regexp"
+	"strings"
+	"sync"
+	"time"
+
+	"github.com/gdamore/tcell/v2"
+	"github.com/rivo/tview"
+
+	"github.com/zrepl/zrepl/internal/client/status/viewmodel"
+)
+
+func interactive(c Client, flag statusFlags) error {
+
+	// Set this so we don't overwrite the default terminal colors
+	// See https://github.com/rivo/tview/blob/master/styles.go
+	tview.Styles.PrimitiveBackgroundColor = tcell.ColorDefault
+	tview.Styles.ContrastBackgroundColor = tcell.ColorDefault
+	tview.Styles.PrimaryTextColor = tcell.ColorDefault
+	tview.Styles.BorderColor = tcell.ColorDefault
+	app := tview.NewApplication()
+
+	jobDetailSplit := tview.NewFlex()
+	jobMenu := tview.NewTreeView()
+	jobMenuRoot := tview.NewTreeNode("jobs")
+	jobMenuRoot.SetSelectable(true)
+	jobMenu.SetRoot(jobMenuRoot)
+	jobMenu.SetCurrentNode(jobMenuRoot)
+	jobTextDetail := tview.NewTextView()
+	jobTextDetail.SetWrap(false)
+
+	jobMenu.SetBorder(true)
+	jobTextDetail.SetBorder(true)
+
+	toolbarSplit := tview.NewFlex()
+	toolbarSplit.SetDirection(tview.FlexRow)
+	inputBarContainer := tview.NewFlex()
+	fsFilterInput := tview.NewInputField()
+	fsFilterInput.SetBorder(false)
+	fsFilterInput.SetFieldBackgroundColor(tcell.ColorDefault)
+	inputBarLabel := tview.NewTextView()
+	inputBarLabel.SetText("[::b]FILTER ")
+	inputBarLabel.SetDynamicColors(true)
+	inputBarContainer.AddItem(inputBarLabel, 7, 1, false)
+	inputBarContainer.AddItem(fsFilterInput, 0, 10, false)
+	toolbarSplit.AddItem(inputBarContainer, 1, 0, false)
+	toolbarSplit.AddItem(jobDetailSplit, 0, 10, false)
+
+	bottombar := tview.NewFlex()
+	bottombar.SetDirection(tview.FlexColumn)
+	bottombarDateView := tview.NewTextView()
+	bottombar.AddItem(bottombarDateView, len(time.Now().String()), 0, false)
+	bottomBarStatus := tview.NewTextView()
+	bottomBarStatus.SetDynamicColors(true)
+	bottomBarStatus.SetTextAlign(tview.AlignRight)
+	bottombar.AddItem(bottomBarStatus, 0, 10, false)
+	toolbarSplit.AddItem(bottombar, 1, 0, false)
+
+	tabbableWithJobMenu := []tview.Primitive{jobMenu, jobTextDetail, fsFilterInput}
+	tabbableWithoutJobMenu := []tview.Primitive{jobTextDetail, fsFilterInput}
+	var tabbable []tview.Primitive
+	tabbableActiveIndex := 0
+	tabbableRedraw := func() {
+		if len(tabbable) == 0 {
+			app.SetFocus(nil)
+			return
+		}
+		if tabbableActiveIndex >= len(tabbable) {
+			app.SetFocus(tabbable[0])
+			return
+		}
+		app.SetFocus(tabbable[tabbableActiveIndex])
+	}
+	tabbableCycle := func() {
+		if len(tabbable) == 0 {
+			return
+		}
+		tabbableActiveIndex = (tabbableActiveIndex + 1) % len(tabbable)
+		app.SetFocus(tabbable[tabbableActiveIndex])
+		tabbableRedraw()
+	}
+
+	jobMenuVisisble := false
+	reconfigureJobDetailSplit := func(setJobMenuVisible bool) {
+		if jobMenuVisisble == setJobMenuVisible {
+			return
+		}
+		jobMenuVisisble = setJobMenuVisible
+		if setJobMenuVisible {
+			jobDetailSplit.RemoveItem(jobTextDetail)
+			jobDetailSplit.AddItem(jobMenu, 0, 1, true)
+			jobDetailSplit.AddItem(jobTextDetail, 0, 5, false)
+			tabbable = tabbableWithJobMenu
+		} else {
+			jobDetailSplit.RemoveItem(jobMenu)
+			tabbable = tabbableWithoutJobMenu
+		}
+		tabbableRedraw()
+	}
+
+	showModal := func(m *tview.Modal, modalDoneFunc func(idx int, label string)) {
+		preModalFocus := app.GetFocus()
+		m.SetDoneFunc(func(idx int, label string) {
+			if modalDoneFunc != nil {
+				modalDoneFunc(idx, label)
+			}
+			app.SetRoot(toolbarSplit, true)
+			app.SetFocus(preModalFocus)
+		})
+		app.SetRoot(m, true)
+	}
+
+	app.SetRoot(toolbarSplit, true)
+	// initial focus
+	tabbableActiveIndex = len(tabbable)
+	tabbableCycle()
+	reconfigureJobDetailSplit(true)
+
+	m := viewmodel.New()
+	params := &viewmodel.Params{
+		Report:                  nil,
+		SelectedJob:             nil,
+		FSFilter:                func(_ string) bool { return true },
+		DetailViewWidth:         100,
+		DetailViewWrap:          false,
+		ShortKeybindingOverview: "[::b]Q[::-] quit  [::b]<TAB>[::-] switch panes [::b]W[::-] wrap lines  [::b]Shift+M[::-] toggle navbar  [::b]Shift+S[::-] signal job [::b]</>[::-] filter filesystems",
+	}
+	paramsMtx := &sync.Mutex{}
+	var redraw func()
+	viewmodelupdate := func(cb func(*viewmodel.Params)) {
+		paramsMtx.Lock()
+		defer paramsMtx.Unlock()
+		cb(params)
+		m.Update(*params)
+	}
+	redraw = func() {
+		jobs := m.Jobs()
+		if flag.Job != "" {
+			job_found := false
+			for _, job := range jobs {
+				if strings.Compare(flag.Job, job.Name()) == 0 {
+					jobs = []*viewmodel.Job{job}
+					job_found = true
+					break
+				}
+			}
+			if !job_found {
+				jobs = nil
+			}
+		}
+		redrawJobsList := false
+		var selectedJobN *tview.TreeNode
+		if len(jobMenuRoot.GetChildren()) == len(jobs) {
+			for i, jobN := range jobMenuRoot.GetChildren() {
+				if jobN.GetReference().(*viewmodel.Job) != jobs[i] {
+					redrawJobsList = true
+					break
+				}
+				if jobN.GetReference().(*viewmodel.Job) == m.SelectedJob() {
+					selectedJobN = jobN
+				}
+			}
+		} else {
+			redrawJobsList = true
+		}
+		if redrawJobsList {
+			selectedTextStyle := tcell.StyleDefault.Bold(true)
+			selectedJobN = nil
+			children := make([]*tview.TreeNode, len(jobs))
+			for i := range jobs {
+				jobN := tview.NewTreeNode(jobs[i].JobTreeTitle())
+				jobN.SetReference(jobs[i])
+				jobN.SetSelectable(true)
+				jobN.SetSelectedTextStyle(selectedTextStyle)
+				children[i] = jobN
+				jobN.SetSelectedFunc(func() {
+					viewmodelupdate(func(p *viewmodel.Params) {
+						p.SelectedJob = jobN.GetReference().(*viewmodel.Job)
+					})
+				})
+				if jobs[i] == m.SelectedJob() {
+					selectedJobN = jobN
+				}
+			}
+			jobMenuRoot.SetChildren(children)
+			jobMenuRoot.SetSelectedTextStyle(selectedTextStyle)
+		}
+
+		if selectedJobN != nil && jobMenu.GetCurrentNode() != selectedJobN {
+			jobMenu.SetCurrentNode(selectedJobN)
+		} else if selectedJobN == nil {
+			// select something, otherwise selection breaks (likely bug in tview)
+			jobMenu.SetCurrentNode(jobMenuRoot)
+		}
+
+		if selJ := m.SelectedJob(); selJ != nil {
+			jobTextDetail.SetText(selJ.FullDescription())
+		} else {
+			jobTextDetail.SetText("please select a job")
+		}
+
+		bottombardatestring := m.DateString()
+		bottombarDateView.SetText(bottombardatestring)
+		bottombar.ResizeItem(bottombarDateView, len(bottombardatestring), 0)
+
+		bottomBarStatus.SetText(m.BottomBarStatus())
+	}
+
+	go func() {
+		defer func() {
+			if err := recover(); err != nil {
+				app.Suspend(func() {
+					panic(err)
+				})
+			}
+		}()
+		for {
+			st, err := c.Status()
+			viewmodelupdate(func(p *viewmodel.Params) {
+				p.Report = st.Jobs
+				p.ReportFetchError = err
+			})
+			app.QueueUpdateDraw(redraw)
+
+			time.Sleep(flag.Delay)
+		}
+	}()
+
+	jobMenu.SetChangedFunc(func(jobN *tview.TreeNode) {
+		viewmodelupdate(func(p *viewmodel.Params) {
+			p.SelectedJob, _ = jobN.GetReference().(*viewmodel.Job)
+		})
+		redraw()
+		jobTextDetail.ScrollToBeginning()
+	})
+	jobMenu.SetSelectedFunc(func(jobN *tview.TreeNode) {
+		app.SetFocus(jobTextDetail)
+	})
+
+	app.SetBeforeDrawFunc(func(screen tcell.Screen) bool {
+		viewmodelupdate(func(p *viewmodel.Params) {
+			_, _, p.DetailViewWidth, _ = jobTextDetail.GetInnerRect()
+		})
+		return false
+	})
+
+	app.SetInputCapture(func(e *tcell.EventKey) *tcell.EventKey {
+		if e.Key() == tcell.KeyTab {
+			// TODO: only if there's no modal showing (long-time bug in zrepl status)
+			tabbableCycle()
+			return nil
+		}
+
+		if e.Key() == tcell.KeyRune && app.GetFocus() == fsFilterInput {
+			return e
+		}
+
+		if e.Key() == tcell.KeyRune && e.Rune() == '/' {
+			if app.GetFocus() != fsFilterInput {
+				app.SetFocus(fsFilterInput)
+			}
+			return e
+		}
+
+		if e.Key() == tcell.KeyRune && e.Rune() == 'M' {
+			reconfigureJobDetailSplit(!jobMenuVisisble)
+			return nil
+		}
+
+		if e.Key() == tcell.KeyRune && e.Rune() == 'q' {
+			app.Stop()
+		}
+
+		if e.Key() == tcell.KeyRune && e.Rune() == 'S' {
+			job, ok := jobMenu.GetCurrentNode().GetReference().(*viewmodel.Job)
+			if !ok {
+				return nil
+			}
+			signals := []string{"wakeup", "reset"}
+			clientFuncs := []func(job string) error{c.SignalWakeup, c.SignalReset}
+			sigMod := tview.NewModal()
+			sigMod.SetBorder(true)
+			sigMod.SetButtonActivatedStyle(tcell.StyleDefault.Bold(true).Reverse(true))
+			sigMod.AddButtons(signals)
+			sigMod.SetText(fmt.Sprintf("Send a signal to job %q", job.Name()))
+			showModal(sigMod, func(idx int, _ string) {
+				go func() {
+					if idx == -1 {
+						return
+					}
+					err := clientFuncs[idx](job.Name())
+					if err != nil {
+						app.QueueUpdate(func() {
+							me := tview.NewModal()
+							me.SetText(fmt.Sprintf("signal error: %s", err))
+							me.AddButtons([]string{"Close"})
+							showModal(me, nil)
+						})
+					}
+				}()
+			})
+		}
+
+		return e
+	})
+
+	fsFilterInput.SetChangedFunc(func(searchterm string) {
+		viewmodelupdate(func(p *viewmodel.Params) {
+			p.FSFilter = func(fs string) bool {
+				r, err := regexp.Compile(searchterm)
+				if err != nil {
+					return true
+				}
+				return r.MatchString(fs)
+			}
+		})
+		redraw()
+		jobTextDetail.ScrollToBeginning()
+	})
+	fsFilterInput.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
+		if event.Key() == tcell.KeyEnter {
+			app.SetFocus(jobTextDetail)
+			return nil
+		}
+		return event
+	})
+
+	jobTextDetail.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
+		if event.Key() == tcell.KeyRune && event.Rune() == 'w' {
+			// toggle wrapping
+			viewmodelupdate(func(p *viewmodel.Params) {
+				p.DetailViewWrap = !p.DetailViewWrap
+			})
+			redraw()
+			return nil
+		}
+		return event
+	})
+
+	return app.Run()
+}

internal/client/status/status_legacy.go

@@ -0,0 +1,128 @@
+package status
+
+import (
+	"fmt"
+	"os"
+	"strings"
+	"sync"
+	"time"
+
+	"github.com/gdamore/tcell/v2"
+	"github.com/mattn/go-isatty"
+	"github.com/pkg/errors"
+	"github.com/rivo/tview"
+
+	"github.com/zrepl/zrepl/internal/client/status/viewmodel"
+)
+
+func legacy(c Client, flag statusFlags) error {
+
+	// Set this so we don't overwrite the default terminal colors
+	// See https://github.com/rivo/tview/blob/master/styles.go
+	tview.Styles.PrimitiveBackgroundColor = tcell.ColorDefault
+	tview.Styles.ContrastBackgroundColor = tcell.ColorDefault
+	tview.Styles.PrimaryTextColor = tcell.ColorDefault
+	tview.Styles.BorderColor = tcell.ColorDefault
+	app := tview.NewApplication()
+
+	textView := tview.NewTextView()
+	textView.SetWrap(true)
+	textView.SetScrollable(true) // so that it allows us to set scroll position
+	// textView.SetScrollBarVisibility(tview.ScrollBarNever)
+
+	app.SetRoot(textView, true)
+
+	width := (1 << 31) - 1
+	wrap := false
+	if isatty.IsTerminal(os.Stdout.Fd()) {
+		wrap = true
+		screen, err := tcell.NewScreen()
+		if err != nil {
+			return errors.Wrap(err, "get terminal dimensions")
+		}
+		if err := screen.Init(); err != nil {
+			return errors.Wrap(err, "init screen")
+		}
+		width, _ = screen.Size()
+		screen.Fini()
+	}
+
+	paramsMtx := &sync.Mutex{}
+	params := viewmodel.Params{
+		Report:                  nil,
+		ReportFetchError:        nil,
+		SelectedJob:             nil,
+		FSFilter:                func(s string) bool { return true },
+		DetailViewWidth:         width,
+		DetailViewWrap:          wrap,
+		ShortKeybindingOverview: "",
+	}
+
+	redraw := func() {
+		textView.Clear()
+
+		paramsMtx.Lock()
+		defer paramsMtx.Unlock()
+
+		if params.ReportFetchError != nil {
+			fmt.Fprintln(textView, params.ReportFetchError.Error())
+		} else if params.Report != nil {
+			m := viewmodel.New()
+			m.Update(params)
+			for _, j := range m.Jobs() {
+				if flag.Job != "" && j.Name() != flag.Job {
+					continue
+				}
+				params.SelectedJob = j
+				m.Update(params)
+				fmt.Fprintln(textView, m.SelectedJob().FullDescription())
+				if flag.Job != "" {
+					break
+				} else {
+					hline := strings.Repeat("-", params.DetailViewWidth)
+					fmt.Fprintln(textView, hline)
+				}
+			}
+		} else {
+			fmt.Fprintln(textView, "waiting for request results")
+		}
+		textView.ScrollToBeginning()
+	}
+
+	app.SetBeforeDrawFunc(func(screen tcell.Screen) bool {
+		// sync resizes to `params`
+		paramsMtx.Lock()
+		_, _, newWidth, _ := textView.GetInnerRect()
+		if newWidth != params.DetailViewWidth {
+			params.DetailViewWidth = newWidth
+			app.QueueUpdateDraw(redraw)
+		}
+		paramsMtx.Unlock()
+
+		textView.ScrollToBeginning() // has the effect of inhibiting user scrolls
+		return false
+	})
+
+	go func() {
+		defer func() {
+			if err := recover(); err != nil {
+				app.Suspend(func() {
+					panic(err)
+				})
+			}
+		}()
+		for {
+			st, err := c.Status()
+			paramsMtx.Lock()
+			params.Report = st.Jobs
+			params.ReportFetchError = err
+			paramsMtx.Unlock()
+
+			app.QueueUpdateDraw(redraw)
+
+			time.Sleep(flag.Delay)
+		}
+	}()
+
+	return app.Run()
+}

internal/client/status/status_raw.go

@@ -0,0 +1,18 @@
+package status
+
+import (
+	"bytes"
+	"io"
+	"os"
+)
+
+func raw(c Client) error {
+	b, err := c.StatusRaw()
+	if err != nil {
+		return err
+	}
+	if _, err := io.Copy(os.Stdout, bytes.NewReader(b)); err != nil {
+		return err
+	}
+	return nil
+}

internal/client/status/viewmodel/bytecountbinary.go

@@ -0,0 +1,26 @@
+package viewmodel
+
+import (
+	"fmt"
+	"math"
+)
+
+func ByteCountBinaryUint(b uint64) string {
+	if b > math.MaxInt64 {
+		panic(b)
+	}
+	return ByteCountBinary(int64(b))
+}
+
+func ByteCountBinary(b int64) string {
+	const unit = 1024
+	if b < unit {
+		return fmt.Sprintf("%d B", b)
+	}
+	div, exp := unit, 0
+	for n := b / unit; n >= unit; n /= unit {
+		div *= unit
+		exp++
+	}
+	return fmt.Sprintf("%.1f %ciB", float64(b)/float64(div), "KMGTPE"[exp])
+}

internal/client/status/viewmodel/bytesprogresshistory.go

@@ -0,0 +1,49 @@
+package viewmodel
+
+import "time"
+
+type byteProgressMeasurement struct {
+	time time.Time
+	val  uint64
+}
+
+type bytesProgressHistory struct {
+	last        *byteProgressMeasurement // pointer as poor man's optional
+	changeCount int
+	lastChange  time.Time
+}
+
+func (p *bytesProgressHistory) Update(currentVal uint64) (bytesPerSecondAvg int64, changeCount int) {
+
+	if p.last == nil {
+		p.last = &byteProgressMeasurement{
+			time: time.Now(),
+			val:  currentVal,
+		}
+		return 0, 0
+	}
+
+	if p.last.val != currentVal {
+		p.changeCount++
+		p.lastChange = time.Now()
+	}
+
+	if time.Since(p.lastChange) > 3*time.Second {
+		p.last = nil
+		return 0, 0
+	}
+
+	var deltaV int64
+	if currentVal >= p.last.val {
+		deltaV = int64(currentVal - p.last.val)
+	} else {
+		deltaV = -int64(p.last.val - currentVal)
+	}
+	deltaT := time.Since(p.last.time)
+	rate := float64(deltaV) / deltaT.Seconds()
+
+	p.last.time = time.Now()
+	p.last.val = currentVal
+
+	return int64(rate), p.changeCount
+}

internal/client/status/viewmodel/render.go

@@ -0,0 +1,660 @@
+package viewmodel
+
+import (
+	"fmt"
+	"math"
+	"sort"
+	"strings"
+	"time"
+
+	"github.com/go-playground/validator/v10"
+	yaml "github.com/zrepl/yaml-config"
+
+	"github.com/zrepl/zrepl/internal/client/status/viewmodel/stringbuilder"
+	"github.com/zrepl/zrepl/internal/config"
+	"github.com/zrepl/zrepl/internal/daemon/job"
+	"github.com/zrepl/zrepl/internal/daemon/pruner"
+	"github.com/zrepl/zrepl/internal/daemon/snapper"
+	"github.com/zrepl/zrepl/internal/replication/report"
+)
+
+type M struct {
+	jobs            map[string]*Job
+	jobsList        []*Job
+	selectedJob     *Job
+	dateString      string
+	bottomBarStatus string
+}
+
+type Job struct {
+	// long-lived
+	name         string
+	byteProgress *bytesProgressHistory
+
+	lastStatus      *job.Status
+	fulldescription string
+}
+
+func New() *M {
+	return &M{
+		jobs:        make(map[string]*Job),
+		jobsList:    make([]*Job, 0),
+		selectedJob: nil,
+	}
+}
+
+type FilterFunc func(string) bool
+
+type Params struct {
+	Report                  map[string]*job.Status
+	ReportFetchError        error
+	SelectedJob             *Job
+	FSFilter                FilterFunc `validate:"required"`
+	DetailViewWidth         int        `validate:"gte=1"`
+	DetailViewWrap          bool
+	ShortKeybindingOverview string
+}
+
+var validate = validator.New()
+
+func (m *M) Update(p Params) {
+
+	if err := validate.Struct(p); err != nil {
+		panic(err)
+	}
+
+	if p.ReportFetchError != nil {
+		m.bottomBarStatus = fmt.Sprintf("[red::]status fetch: %s", p.ReportFetchError)
+	} else {
+		m.bottomBarStatus = p.ShortKeybindingOverview
+		for jobname, st := range p.Report {
+			// TODO handle job renames & deletions
+			j, ok := m.jobs[jobname]
+			if !ok {
+				j = &Job{
+					name:         jobname,
+					byteProgress: &bytesProgressHistory{},
+				}
+				m.jobs[jobname] = j
+				m.jobsList = append(m.jobsList, j)
+			}
+			j.lastStatus = st
+		}
+	}
+
+	// filter out internal jobs
+	var jobsList []*Job
+	for _, j := range m.jobsList {
+		if config.IsInternalJobName(j.name) {
+			continue
+		}
+		jobsList = append(jobsList, j)
+	}
+	m.jobsList = jobsList
+
+	// determinism!
+	sort.Slice(m.jobsList, func(i, j int) bool {
+		return strings.Compare(m.jobsList[i].name, m.jobsList[j].name) < 0
+	})
+
+	// try to not lose the selected job
+	m.selectedJob = nil
+	for _, j := range m.jobsList {
+		j.updateFullDescription(p)
+		if j == p.SelectedJob {
+			m.selectedJob = j
+		}
+	}
+
+	m.dateString = time.Now().Format(time.RFC3339)
+
+}
+
+func (m *M) BottomBarStatus() string { return m.bottomBarStatus }
+
+func (m *M) Jobs() []*Job { return m.jobsList }
+
+// may be nil
+func (m *M) SelectedJob() *Job { return m.selectedJob }
+
+func (m *M) DateString() string { return m.dateString }
+
+func (j *Job) updateFullDescription(p Params) {
+	width := p.DetailViewWidth
+	if !p.DetailViewWrap {
+		width = 10000000 // FIXME
+	}
+	b := stringbuilder.New(stringbuilder.Config{
+		IndentMultiplier: 3,
+		Width:            width,
+	})
+	drawJob(b, j.name, j.lastStatus, j.byteProgress, p.FSFilter)
+	j.fulldescription = b.String()
+}
+
+func (j *Job) JobTreeTitle() string {
+	return j.name
+}
+
+func (j *Job) FullDescription() string {
+	return j.fulldescription
+}
+
+func (j *Job) Name() string {
+	return j.name
+}
+
+func drawJob(t *stringbuilder.B, name string, v *job.Status, history *bytesProgressHistory, fsfilter FilterFunc) {
+
+	t.Printf("Job: %s\n", name)
+	t.Printf("Type: %s\n\n", v.Type)
+
+	if v.Type == job.TypePush || v.Type == job.TypePull {
+		activeStatus, ok := v.JobSpecific.(*job.ActiveSideStatus)
+		if !ok || activeStatus == nil {
+			t.Printf("ActiveSideStatus is null")
+			t.Newline()
+			return
+		}
+
+		t.Printf("Replication:")
+		t.AddIndentAndNewline(1)
+		renderReplicationReport(t, activeStatus.Replication, history, fsfilter)
+		t.AddIndentAndNewline(-1)
+
+		t.Printf("Pruning Sender:")
+		t.AddIndentAndNewline(1)
+		renderPrunerReport(t, activeStatus.PruningSender, fsfilter)
+		t.AddIndentAndNewline(-1)
+
+		t.Printf("Pruning Receiver:")
+		t.AddIndentAndNewline(1)
+		renderPrunerReport(t, activeStatus.PruningReceiver, fsfilter)
+		t.AddIndentAndNewline(-1)
+
+		if v.Type == job.TypePush {
+			t.Printf("Snapshotting:")
+			t.AddIndentAndNewline(1)
+			renderSnapperReport(t, activeStatus.Snapshotting, fsfilter)
+			t.AddIndentAndNewline(-1)
+		}
+
+	} else if v.Type == job.TypeSnap {
+		snapStatus, ok := v.JobSpecific.(*job.SnapJobStatus)
+		if !ok || snapStatus == nil {
+			t.Printf("SnapJobStatus is null")
+			t.Newline()
+			return
+		}
+		t.Printf("Pruning snapshots:")
+		t.AddIndentAndNewline(1)
+		renderPrunerReport(t, snapStatus.Pruning, fsfilter)
+		t.AddIndentAndNewline(-1)
+		t.Printf("Snapshotting:")
+		t.AddIndentAndNewline(1)
+		renderSnapperReport(t, snapStatus.Snapshotting, fsfilter)
+		t.AddIndentAndNewline(-1)
+	} else if v.Type == job.TypeSource {
+
+		st := v.JobSpecific.(*job.PassiveStatus)
+		t.Printf("Snapshotting:\n")
+		t.AddIndent(1)
+		renderSnapperReport(t, st.Snapper, fsfilter)
+		t.AddIndentAndNewline(-1)
+
+	} else {
+		t.Printf("No status representation for job type '%s', dumping as YAML", v.Type)
+		t.Newline()
+		asYaml, err := yaml.Marshal(v.JobSpecific)
+		if err != nil {
+			t.Printf("Error marshaling status to YAML: %s", err)
+			t.Newline()
+			return
+		}
+		t.Write(string(asYaml))
+		t.Newline()
+	}
+}
+
+func printFilesystemStatus(t *stringbuilder.B, rep *report.FilesystemReport, maxFS int) {
+
+	expected, replicated, containsInvalidSizeEstimates := rep.BytesSum()
+	sizeEstimationImpreciseNotice := ""
+	if containsInvalidSizeEstimates {
+		sizeEstimationImpreciseNotice = " (some steps lack size estimation)"
+	}
+	if rep.CurrentStep < len(rep.Steps) && rep.Steps[rep.CurrentStep].Info.BytesExpected == 0 {
+		sizeEstimationImpreciseNotice = " (step lacks size estimation)"
+	}
+
+	userVisisbleCurrentStep, userVisibleTotalSteps := rep.CurrentStep, len(rep.Steps)
+	// `.CurrentStep` is == len(rep.Steps) if all steps are done.
+	// Until then, it's an index into .Steps that starts at 0.
+	// For the user, we want it to start at 1.
+	if rep.CurrentStep >= len(rep.Steps) {
+		// rep.CurrentStep is what we want to show.
+		// We check for >= and not == for robustness.
+	} else {
+		// We're not done yet, so, make step count start at 1
+		// (The `.State` is included in the output, indicating we're not done yet)
+		userVisisbleCurrentStep = rep.CurrentStep + 1
+	}
+	status := fmt.Sprintf("%s (step %d/%d, %s/%s)%s",
+		strings.ToUpper(string(rep.State)),
+		userVisisbleCurrentStep, userVisibleTotalSteps,
+		ByteCountBinaryUint(replicated), ByteCountBinaryUint(expected),
+		sizeEstimationImpreciseNotice,
+	)
+
+	activeIndicator := " "
+	if rep.BlockedOn == report.FsBlockedOnNothing &&
+		(rep.State == report.FilesystemPlanning || rep.State == report.FilesystemStepping) {
+		activeIndicator = "*"
+	}
+	t.AddIndent(1)
+	t.Printf("%s %s %s ",
+		activeIndicator,
+		stringbuilder.RightPad(rep.Info.Name, maxFS, " "),
+		status)
+
+	next := ""
+	if err := rep.Error(); err != nil {
+		next = err.Err
+	} else if rep.State != report.FilesystemDone {
+		if nextStep := rep.NextStep(); nextStep != nil {
+			if nextStep.IsIncremental() {
+				next = fmt.Sprintf("next: %s => %s", nextStep.Info.From, nextStep.Info.To)
+			} else {
+				next = fmt.Sprintf("next: full send %s", nextStep.Info.To)
+			}
+			attribs := []string{}
+
+			if nextStep.Info.Resumed {
+				attribs = append(attribs, "resumed")
+			}
+
+			if len(attribs) > 0 {
+				next += fmt.Sprintf(" (%s)", strings.Join(attribs, ", "))
+			}
+		} else {
+			next = "" // individual FSes may still be in planning state
+		}
+
+	}
+	t.Printf("%s", next)
+
+	t.AddIndent(-1)
+	t.Newline()
+}
+
+func renderReplicationReport(t *stringbuilder.B, rep *report.Report, history *bytesProgressHistory, fsfilter FilterFunc) {
+	if rep == nil {
+		t.Printf("...\n")
+		return
+	}
+
+	if rep.WaitReconnectError != nil {
+		t.PrintfDrawIndentedAndWrappedIfMultiline("Connectivity: %s", rep.WaitReconnectError)
+		t.Newline()
+	}
+	if !rep.WaitReconnectSince.IsZero() {
+		delta := time.Until(rep.WaitReconnectUntil).Round(time.Second)
+		if rep.WaitReconnectUntil.IsZero() || delta > 0 {
+			var until string
+			if rep.WaitReconnectUntil.IsZero() {
+				until = "waiting indefinitely"
+			} else {
+				until = fmt.Sprintf("hard fail in %s @ %s", delta, rep.WaitReconnectUntil)
+			}
+			t.PrintfDrawIndentedAndWrappedIfMultiline("Connectivity: reconnecting with exponential backoff (since %s) (%s)",
+				rep.WaitReconnectSince, until)
+		} else {
+			t.PrintfDrawIndentedAndWrappedIfMultiline("Connectivity: reconnects reached hard-fail timeout @ %s", rep.WaitReconnectUntil)
+		}
+		t.Newline()
+	}
+
+	// TODO visualize more than the latest attempt by folding all attempts into one
+	if len(rep.Attempts) == 0 {
+		t.Printf("no attempts made yet")
+		return
+	} else {
+		t.Printf("Attempt #%d", len(rep.Attempts))
+		if len(rep.Attempts) > 1 {
+			t.Printf(". Previous attempts failed with the following statuses:")
+			t.AddIndentAndNewline(1)
+			for i, a := range rep.Attempts[:len(rep.Attempts)-1] {
+				t.PrintfDrawIndentedAndWrappedIfMultiline("#%d: %s (failed at %s) (ran %s)\n", i+1, a.State, a.FinishAt, a.FinishAt.Sub(a.StartAt))
+			}
+			t.AddIndentAndNewline(-1)
+		} else {
+			t.Newline()
+		}
+	}
+
+	latest := rep.Attempts[len(rep.Attempts)-1]
+	sort.Slice(latest.Filesystems, func(i, j int) bool {
+		return latest.Filesystems[i].Info.Name < latest.Filesystems[j].Info.Name
+	})
+
+	// apply filter
+	filtered := make([]*report.FilesystemReport, 0, len(latest.Filesystems))
+	for _, fs := range latest.Filesystems {
+		if !fsfilter(fs.Info.Name) {
+			continue
+		}
+		filtered = append(filtered, fs)
+	}
+	latest.Filesystems = filtered
+
+	t.Printf("Status: %s", latest.State)
+	t.Newline()
+	if !latest.FinishAt.IsZero() {
+		t.Printf("Last Run: %s (lasted %s)\n", latest.FinishAt.Round(time.Second), latest.FinishAt.Sub(latest.StartAt).Round(time.Second))
+	} else {
+		t.Printf("Started: %s (lasting %s)\n", latest.StartAt.Round(time.Second), time.Since(latest.StartAt).Round(time.Second))
+	}
+
+	if latest.State == report.AttemptPlanningError {
+		t.Printf("Problem: ")
+		t.PrintfDrawIndentedAndWrappedIfMultiline("%s", latest.PlanError)
+		t.Newline()
+	} else if latest.State == report.AttemptFanOutError {
+		t.Printf("Problem: one or more of the filesystems encountered errors")
+		t.Newline()
+	}
+
+	if latest.State != report.AttemptPlanning && latest.State != report.AttemptPlanningError {
+		// Draw global progress bar
+		// Progress: [---------------]
+		expected, replicated, containsInvalidSizeEstimates := latest.BytesSum()
+		rate, changeCount := history.Update(replicated)
+		eta := time.Duration(0)
+		if rate > 0 {
+			eta = time.Duration((float64(expected)-float64(replicated))/float64(rate)) * time.Second
+		}
+
+		if !latest.State.IsTerminal() {
+			t.Write("Progress: ")
+			t.DrawBar(50, replicated, expected, changeCount)
+			t.Write(fmt.Sprintf(" %s / %s @ %s/s", ByteCountBinaryUint(replicated), ByteCountBinaryUint(expected), ByteCountBinary(rate)))
+			if eta != 0 {
+				t.Write(fmt.Sprintf(" (%s remaining)", humanizeDuration(eta)))
+			}
+			t.Newline()
+		}
+		if containsInvalidSizeEstimates {
+			t.Write("NOTE: not all steps could be size-estimated, total estimate is likely imprecise!")
+			t.Newline()
+		}
+
+		if len(latest.Filesystems) == 0 {
+			t.Write("NOTE: no filesystems were considered for replication!")
+			t.Newline()
+		}
+
+		var maxFSLen int
+		for _, fs := range latest.Filesystems {
+			if len(fs.Info.Name) > maxFSLen {
+				maxFSLen = len(fs.Info.Name)
+			}
+		}
+		for _, fs := range latest.Filesystems {
+			printFilesystemStatus(t, fs, maxFSLen)
+		}
+
+	}
+}
+
+func humanizeDuration(duration time.Duration) string {
+	days := int64(duration.Hours() / 24)
+	hours := int64(math.Mod(duration.Hours(), 24))
+	minutes := int64(math.Mod(duration.Minutes(), 60))
+	seconds := int64(math.Mod(duration.Seconds(), 60))
+
+	var parts []string
+
+	force := false
+	chunks := []int64{days, hours, minutes, seconds}
+	for i, chunk := range chunks {
+		if force || chunk > 0 {
+			padding := 0
+			if force {
+				padding = 2
+			}
+			parts = append(parts, fmt.Sprintf("%*d%c", padding, chunk, "dhms"[i]))
+			force = true
+		}
+	}
+
+	return strings.Join(parts, " ")
+}
+
+func renderPrunerReport(t *stringbuilder.B, r *pruner.Report, fsfilter FilterFunc) {
+	if r == nil {
+		t.Printf("...\n")
+		return
+	}
+
+	state, err := pruner.StateString(r.State)
+	if err != nil {
+		t.Printf("Status: %q (parse error: %q)\n", r.State, err)
+		return
+	}
+
+	t.Printf("Status: %s", state)
+	t.Newline()
+
+	if r.Error != "" {
+		t.Printf("Error: %s\n", r.Error)
+	}
+
+	type commonFS struct {
+		*pruner.FSReport
+		completed bool
+	}
+	all := make([]commonFS, 0, len(r.Pending)+len(r.Completed))
+	for i := range r.Pending {
+		all = append(all, commonFS{&r.Pending[i], false})
+	}
+	for i := range r.Completed {
+		all = append(all, commonFS{&r.Completed[i], true})
+	}
+
+	// filter all
+	filtered := make([]commonFS, 0, len(all))
+	for _, fs := range all {
+		if fsfilter(fs.FSReport.Filesystem) {
+			filtered = append(filtered, fs)
+		}
+	}
+	all = filtered
+
+	switch state {
+	case pruner.Plan:
+		fallthrough
+	case pruner.PlanErr:
+		return
+	}
+
+	if len(all) == 0 {
+		t.Printf("nothing to do\n")
+		return
+	}
+
+	var totalDestroyCount, completedDestroyCount int
+	var maxFSname int
+	for _, fs := range all {
+		totalDestroyCount += len(fs.DestroyList)
+		if fs.completed {
+			completedDestroyCount += len(fs.DestroyList)
+		}
+		if maxFSname < len(fs.Filesystem) {
+			maxFSname = len(fs.Filesystem)
+		}
+	}
+
+	// global progress bar
+	if !state.IsTerminal() {
+		progress := int(math.Round(80 * float64(completedDestroyCount) / float64(totalDestroyCount)))
+		t.Write("Progress: ")
+		t.Write("[")
+		t.Write(stringbuilder.Times("=", progress))
+		t.Write(">")
+		t.Write(stringbuilder.Times("-", 80-progress))
+		t.Write("]")
+		t.Printf(" %d/%d snapshots", completedDestroyCount, totalDestroyCount)
+		t.Newline()
+	}
+
+	sort.SliceStable(all, func(i, j int) bool {
+		return strings.Compare(all[i].Filesystem, all[j].Filesystem) == -1
+	})
+
+	// Draw a table-like representation of 'all'
+	for _, fs := range all {
+		t.Write(stringbuilder.RightPad(fs.Filesystem, maxFSname, " "))
+		t.Write(" ")
+		if !fs.SkipReason.NotSkipped() {
+			t.Printf("skipped: %s\n", fs.SkipReason)
+			continue
+		}
+		if fs.LastError != "" {
+			if strings.ContainsAny(fs.LastError, "\r\n") {
+				t.Printf("ERROR:")
+				t.PrintfDrawIndentedAndWrappedIfMultiline("%s\n", fs.LastError)
+			} else {
+				t.PrintfDrawIndentedAndWrappedIfMultiline("ERROR: %s\n", fs.LastError)
+			}
+			t.Newline()
+			continue
+		}
+
+		pruneRuleActionStr := fmt.Sprintf("(destroy %d of %d snapshots)",
+			len(fs.DestroyList), len(fs.SnapshotList))
+
+		if fs.completed {
+			t.Printf("Completed  %s\n", pruneRuleActionStr)
+			continue
+		}
+
+		t.Write("Pending    ") // whitespace is padding 10
+		if len(fs.DestroyList) == 1 {
+			t.Write(fs.DestroyList[0].Name)
+		} else {
+			t.Write(pruneRuleActionStr)
+		}
+		t.Newline()
+	}
+
+}
+
+func renderSnapperReport(t *stringbuilder.B, r *snapper.Report, fsfilter FilterFunc) {
+	if r == nil {
+		t.Printf("<no snapshotting report available>\n")
+		return
+	}
+	t.Printf("Type: %s\n", r.Type)
+	if r.Periodic != nil {
+		renderSnapperReportPeriodic(t, r.Periodic, fsfilter)
+	} else if r.Cron != nil {
+		renderSnapperReportCron(t, r.Cron, fsfilter)
+	} else {
+		t.Printf("<no details available>")
+	}
+}
+
+func renderSnapperReportPeriodic(t *stringbuilder.B, r *snapper.PeriodicReport, fsfilter FilterFunc) {
+	t.Printf("Status: %s", r.State)
+	t.Newline()
+
+	if r.Error != "" {
+		t.Printf("Error: %s\n", r.Error)
+	}
+	if !r.SleepUntil.IsZero() {
+		t.Printf("Sleep until: %s\n", r.SleepUntil)
+	}
+
+	renderSnapperPlanReportFilesystem(t, r.Progress, fsfilter)
+}
+
+func renderSnapperReportCron(t *stringbuilder.B, r *snapper.CronReport, fsfilter FilterFunc) {
+	t.Printf("State: %s\n", r.State)
+
+	now := time.Now()
+	if r.WakeupTime.After(now) {
+		t.Printf("Sleep until: %s (%s remaining)\n", r.WakeupTime, r.WakeupTime.Sub(now).Round(time.Second))
+	} else {
+		t.Printf("Started: %s (lasting %s)\n", r.WakeupTime, now.Sub(r.WakeupTime).Round(time.Second))
+	}
+
+	renderSnapperPlanReportFilesystem(t, r.Progress, fsfilter)
+}
+
+func renderSnapperPlanReportFilesystem(t *stringbuilder.B, fss []*snapper.ReportFilesystem, fsfilter FilterFunc) {
+	sort.Slice(fss, func(i, j int) bool {
+		return strings.Compare(fss[i].Path, fss[j].Path) == -1
+	})
+
+	dur := func(d time.Duration) string {
+		return d.Round(100 * time.Millisecond).String()
+	}
+
+	type row struct {
+		path, state, duration, remainder, hookReport string
+	}
+	var widths struct {
+		path, state, duration int
+	}
+	rows := make([]*row, 0, len(fss))
+	for _, fs := range fss {
+		if !fsfilter(fs.Path) {
+			continue
+		}
+		r := &row{
+			path:  fs.Path,
+			state: fs.State.String(),
+		}
+		if fs.HooksHadError {
+			r.hookReport = fs.Hooks // FIXME render here, not in daemon
+		}
+		switch fs.State {
+		case snapper.SnapPending:
+			r.duration = "..."
+			r.remainder = ""
+		case snapper.SnapStarted:
+			r.duration = dur(time.Since(fs.StartAt))
+			r.remainder = fmt.Sprintf("snap name: %q", fs.SnapName)
+		case snapper.SnapDone:
+			fallthrough
+		case snapper.SnapError:
+			r.duration = dur(fs.DoneAt.Sub(fs.StartAt))
+			r.remainder = fmt.Sprintf("snap name: %q", fs.SnapName)
+		}
+		rows = append(rows, r)
+		if len(r.path) > widths.path {
+			widths.path = len(r.path)
+		}
+		if len(r.state) > widths.state {
+			widths.state = len(r.state)
+		}
+		if len(r.duration) > widths.duration {
+			widths.duration = len(r.duration)
+		}
+	}
+
+	for _, r := range rows {
+		path := stringbuilder.RightPad(r.path, widths.path, " ")
+		state := stringbuilder.RightPad(r.state, widths.state, " ")
+		duration := stringbuilder.RightPad(r.duration, widths.duration, " ")
+		t.Printf("%s %s %s", path, state, duration)
+		t.PrintfDrawIndentedAndWrappedIfMultiline(" %s", r.remainder)
+		if r.hookReport != "" {
+			t.AddIndent(1)
+			t.Newline()
+			t.Printf("%s", r.hookReport)
+			t.AddIndent(-1)
+		}
+		t.Newline()
+	}
+}

internal/client/status/viewmodel/stringbuilder/stringbuilder.go

@@ -0,0 +1,119 @@
+package stringbuilder
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/go-playground/validator/v10"
+)
+
+type B struct {
+	// const
+	indentMultiplier int
+
+	// mut
+	sb     *strings.Builder
+	indent int
+	width  int
+	x, y   int
+}
+
+type Config struct {
+	IndentMultiplier int `validate:"gte=1"`
+	Width            int `validate:"gte=1"`
+}
+
+var validate = validator.New()
+
+func New(config Config) *B {
+
+	if err := validate.Struct(config); err != nil {
+		panic(err)
+	}
+
+	return &B{sb: &strings.Builder{}, width: config.Width, indentMultiplier: config.IndentMultiplier}
+}
+
+func (b *B) String() string { return b.sb.String() }
+
+func (w *B) Newline() {
+	w.Write("\n")
+}
+
+func (w *B) PrintfDrawIndentedAndWrappedIfMultiline(format string, args ...interface{}) {
+	whole := fmt.Sprintf(format, args...)
+	if strings.ContainsAny(whole, "\n\r") {
+		w.AddIndent(1)
+		defer w.AddIndent(-1)
+	}
+	w.Write(whole)
+}
+
+func (w *B) Printf(format string, args ...interface{}) {
+	whole := fmt.Sprintf(format, args...)
+	w.Write(whole)
+}
+
+func (t *B) AddIndent(delta int) {
+	t.indent += delta * t.indentMultiplier
+}
+
+func (t *B) AddIndentAndNewline(delta int) {
+	t.indent += delta * t.indentMultiplier
+	t.Write("\n")
+}
+
+func (w *B) Write(s string) {
+	for _, c := range s {
+		if c == '\n' {
+			fmt.Fprint(w.sb, "\n")
+			w.x = 0
+			fmt.Fprint(w.sb, Times(" ", w.indent-w.x))
+			w.x = w.indent
+			w.y++
+			continue
+		}
+		if w.x >= w.width {
+			fmt.Fprint(w.sb, "\n")
+			w.x = 0
+			fmt.Fprint(w.sb, Times(" ", w.indent-w.x))
+			w.x = w.indent
+		}
+		fmt.Fprintf(w.sb, "%c", c)
+		w.x++
+	}
+}
+
+func Times(str string, n int) (out string) {
+	for i := 0; i < n; i++ {
+		out += str
+	}
+	return
+}
+
+func RightPad(str string, length int, pad string) string {
+	if len(str) > length {
+		return str[:length]
+	}
+	return str + strings.Repeat(pad, length-len(str))
+}
+
+// changeCount = 0 indicates stall / no progress
+func (w *B) DrawBar(length int, bytes, totalBytes uint64, changeCount int) {
+	const arrowPositions = `>\|/`
+	var completedLength int
+	if totalBytes > 0 {
+		completedLength = int(uint64(length) * bytes / totalBytes)
+		if completedLength > length {
+			completedLength = length
+		}
+	} else if totalBytes == bytes {
+		completedLength = length
+	}
+
+	w.Write("[")
+	w.Write(Times("=", completedLength))
+	w.Write(string(arrowPositions[changeCount%len(arrowPositions)]))
+	w.Write(Times("-", length-completedLength))
+	w.Write("]")
+}

internal/client/stdinserver.go

@@ -5,8 +5,8 @@ import (
 
 	"github.com/problame/go-netssh"
 
-	"github.com/zrepl/zrepl/cli"
-	"github.com/zrepl/zrepl/config"
+	"github.com/zrepl/zrepl/internal/cli"
+	"github.com/zrepl/zrepl/internal/config"
 
 	"context"
 	"errors"

internal/client/testcmd.go

@@ -9,10 +9,10 @@ import (
 	"github.com/pkg/errors"
 	"github.com/spf13/pflag"
 
-	"github.com/zrepl/zrepl/cli"
-	"github.com/zrepl/zrepl/config"
-	"github.com/zrepl/zrepl/daemon/filters"
-	"github.com/zrepl/zrepl/zfs"
+	"github.com/zrepl/zrepl/internal/cli"
+	"github.com/zrepl/zrepl/internal/config"
+	"github.com/zrepl/zrepl/internal/daemon/filters"
+	"github.com/zrepl/zrepl/internal/zfs"
 )
 
 var TestCmd = &cli.Subcommand{
@@ -139,9 +139,11 @@ var testPlaceholder = &cli.Subcommand{
 func runTestPlaceholder(ctx context.Context, subcommand *cli.Subcommand, args []string) error {
 
 	var checkDPs []*zfs.DatasetPath
+	var datasetWasExplicitArgument bool
 
 	// all actions first
 	if testPlaceholderArgs.all {
+		datasetWasExplicitArgument = false
 		out, err := zfs.ZFSList(ctx, []string{"name"})
 		if err != nil {
 			return errors.Wrap(err, "could not list ZFS filesystems")
@@ -154,6 +156,7 @@ func runTestPlaceholder(ctx context.Context, subcommand *cli.Subcommand, args []
 			checkDPs = append(checkDPs, dp)
 		}
 	} else {
+		datasetWasExplicitArgument = true
 		dp, err := zfs.NewDatasetPath(testPlaceholderArgs.ds)
 		if err != nil {
 			return err
@@ -171,7 +174,12 @@ func runTestPlaceholder(ctx context.Context, subcommand *cli.Subcommand, args []
 			return errors.Wrap(err, "cannot get placeholder state")
 		}
 		if !ph.FSExists {
-			panic("placeholder state inconsistent: filesystem " + ph.FS + " must exist in this context")
+			if datasetWasExplicitArgument {
+				return errors.Errorf("filesystem %q does not exist", ph.FS)
+			} else {
+				// got deleted between ZFSList and ZFSGetFilesystemPlaceholderState
+				continue
+			}
 		}
 		is := "yes"
 		if !ph.IsPlaceholder {

internal/client/version.go

@@ -7,10 +7,10 @@ import (
 
 	"github.com/spf13/pflag"
 
-	"github.com/zrepl/zrepl/cli"
-	"github.com/zrepl/zrepl/config"
-	"github.com/zrepl/zrepl/daemon"
-	"github.com/zrepl/zrepl/version"
+	"github.com/zrepl/zrepl/internal/cli"
+	"github.com/zrepl/zrepl/internal/config"
+	"github.com/zrepl/zrepl/internal/daemon"
+	"github.com/zrepl/zrepl/internal/version"
 )
 
 var versionArgs struct {

internal/client/zfsabstractions.go

@@ -7,10 +7,10 @@ import (
 
 	"github.com/spf13/pflag"
 
-	"github.com/zrepl/zrepl/cli"
-	"github.com/zrepl/zrepl/daemon/filters"
-	"github.com/zrepl/zrepl/endpoint"
-	"github.com/zrepl/zrepl/zfs"
+	"github.com/zrepl/zrepl/internal/cli"
+	"github.com/zrepl/zrepl/internal/daemon/filters"
+	"github.com/zrepl/zrepl/internal/endpoint"
+	"github.com/zrepl/zrepl/internal/zfs"
 )
 
 var (
@@ -57,7 +57,7 @@ func (f *zabsFilterFlags) registerZabsFilterFlags(s *pflag.FlagSet, verb string)
 	for v := range endpoint.AbstractionTypesAll {
 		variants = append(variants, string(v))
 	}
-	variants = sort.StringSlice(variants)
+	sort.Strings(variants)
 	variantsJoined := strings.Join(variants, "|")
 	s.Var(&f.Types, "type", fmt.Sprintf("only %s holds of the specified type [default: all] [comma-separated list of %s]", verb, variantsJoined))
 

internal/client/zfsabstractions_create.go

@@ -1,6 +1,6 @@
 package client
 
-import "github.com/zrepl/zrepl/cli"
+import "github.com/zrepl/zrepl/internal/cli"
 
 var zabsCmdCreate = &cli.Subcommand{
 	Use:             "create",

internal/client/zfsabstractions_create_step_hold.go

@@ -7,9 +7,9 @@ import (
 	"github.com/pkg/errors"
 	"github.com/spf13/pflag"
 
-	"github.com/zrepl/zrepl/cli"
-	"github.com/zrepl/zrepl/endpoint"
-	"github.com/zrepl/zrepl/zfs"
+	"github.com/zrepl/zrepl/internal/cli"
+	"github.com/zrepl/zrepl/internal/endpoint"
+	"github.com/zrepl/zrepl/internal/zfs"
 )
 
 var zabsCreateStepHoldFlags struct {

internal/client/zfsabstractions_list.go

@@ -11,9 +11,9 @@ import (
 	"github.com/pkg/errors"
 	"github.com/spf13/pflag"
 
-	"github.com/zrepl/zrepl/cli"
-	"github.com/zrepl/zrepl/endpoint"
-	"github.com/zrepl/zrepl/util/chainlock"
+	"github.com/zrepl/zrepl/internal/cli"
+	"github.com/zrepl/zrepl/internal/endpoint"
+	"github.com/zrepl/zrepl/internal/util/chainlock"
 )
 
 var zabsListFlags struct {
@@ -44,17 +44,18 @@ func doZabsList(ctx context.Context, sc *cli.Subcommand, args []string) error {
 		return errors.Wrap(err, "invalid filter specification on command line")
 	}
 
-	abstractions, errors, err := endpoint.ListAbstractionsStreamed(ctx, q)
+	abstractions, errors, drainDone, err := endpoint.ListAbstractionsStreamed(ctx, q)
 	if err != nil {
 		return err // context clear by invocation of command
 	}
+	defer drainDone()
 
 	var line chainlock.L
 	var wg sync.WaitGroup
 	defer wg.Wait()
-	wg.Add(1)
 
 	// print results
+	wg.Add(1)
 	go func() {
 		defer wg.Done()
 		enc := json.NewEncoder(os.Stdout)

internal/client/zfsabstractions_release.go

@@ -10,8 +10,8 @@ import (
 	"github.com/pkg/errors"
 	"github.com/spf13/pflag"
 
-	"github.com/zrepl/zrepl/cli"
-	"github.com/zrepl/zrepl/endpoint"
+	"github.com/zrepl/zrepl/internal/cli"
+	"github.com/zrepl/zrepl/internal/endpoint"
 )
 
 // shared between release-all and release-step

internal/config/config.go

@@ -2,21 +2,32 @@ package config
 
 import (
 	"fmt"
-	"io/ioutil"
 	"log/syslog"
 	"os"
-	"reflect"
-	"regexp"
-	"strconv"
+	pathpkg "path"
+	"path/filepath"
+	"strings"
 	"time"
 
 	"github.com/pkg/errors"
+	"github.com/robfig/cron/v3"
 	"github.com/zrepl/yaml-config"
+
+	"github.com/zrepl/zrepl/internal/util/datasizeunit"
+	zfsprop "github.com/zrepl/zrepl/internal/zfs/property"
+)
+
+type ParseFlags uint
+
+const (
+	ParseFlagsNone        ParseFlags = 0
+	ParseFlagsNoCertCheck ParseFlags = 1 << iota
 )
 
 type Config struct {
-	Jobs   []JobEnum `yaml:"jobs"`
+	Jobs    []JobEnum `yaml:"jobs,optional"`
 	Global  *Global   `yaml:"global,optional,fromdefaults"`
+	Include []string  `yaml:"include,optional"`
 }
 
 func (c *Config) Job(name string) (*JobEnum, error) {
@@ -56,40 +67,64 @@ type ActiveJob struct {
 	Name               string                `yaml:"name"`
 	Connect            ConnectEnum           `yaml:"connect"`
 	Pruning            PruningSenderReceiver `yaml:"pruning"`
-	Debug       JobDebugSettings      `yaml:"debug,optional"`
 	Replication        *Replication          `yaml:"replication,optional,fromdefaults"`
+	ConflictResolution *ConflictResolution   `yaml:"conflict_resolution,optional,fromdefaults"`
+}
+
+type ConflictResolution struct {
+	InitialReplication string `yaml:"initial_replication,optional,default=most_recent"`
 }
 
 type PassiveJob struct {
 	Type  string    `yaml:"type"`
 	Name  string    `yaml:"name"`
 	Serve ServeEnum `yaml:"serve"`
-	Debug JobDebugSettings `yaml:"debug,optional"`
 }
 
 type SnapJob struct {
 	Type         string            `yaml:"type"`
 	Name         string            `yaml:"name"`
 	Pruning      PruningLocal      `yaml:"pruning"`
-	Debug        JobDebugSettings  `yaml:"debug,optional"`
 	Snapshotting SnapshottingEnum  `yaml:"snapshotting"`
 	Filesystems  FilesystemsFilter `yaml:"filesystems"`
 }
 
 type SendOptions struct {
 	Encrypted        bool `yaml:"encrypted,optional,default=false"`
+	Raw              bool `yaml:"raw,optional,default=false"`
+	SendProperties   bool `yaml:"send_properties,optional,default=false"`
+	BackupProperties bool `yaml:"backup_properties,optional,default=false"`
+	LargeBlocks      bool `yaml:"large_blocks,optional,default=false"`
+	Compressed       bool `yaml:"compressed,optional,default=false"`
+	EmbeddedData     bool `yaml:"embedded_data,optional,default=false"`
+	Saved            bool `yaml:"saved,optional,default=false"`
+
+	BandwidthLimit *BandwidthLimit `yaml:"bandwidth_limit,optional,fromdefaults"`
 }
 
 type RecvOptions struct {
 	// Note: we cannot enforce encrypted recv as the ZFS cli doesn't provide a mechanism for it
 	// Encrypted bool `yaml:"may_encrypted"`
-
 	// Future:
 	// Reencrypt bool `yaml:"reencrypt"`
+
+	Properties *PropertyRecvOptions `yaml:"properties,fromdefaults"`
+
+	BandwidthLimit *BandwidthLimit `yaml:"bandwidth_limit,optional,fromdefaults"`
+
+	Placeholder *PlaceholderRecvOptions `yaml:"placeholder,fromdefaults"`
+}
+
+var _ yaml.Unmarshaler = &datasizeunit.Bits{}
+
+type BandwidthLimit struct {
+	Max            datasizeunit.Bits `yaml:"max,default=-1 B"`
+	BucketCapacity datasizeunit.Bits `yaml:"bucket_capacity,default=128 KiB"`
 }
 
 type Replication struct {
 	Protection  *ReplicationOptionsProtection  `yaml:"protection,optional,fromdefaults"`
+	Concurrency *ReplicationOptionsConcurrency `yaml:"concurrency,optional,fromdefaults"`
 }
 
 type ReplicationOptionsProtection struct {
@@ -97,6 +132,20 @@ type ReplicationOptionsProtection struct {
 	Incremental string `yaml:"incremental,optional,default=guarantee_resumability"`
 }
 
+type ReplicationOptionsConcurrency struct {
+	Steps         int `yaml:"steps,optional,default=1"`
+	SizeEstimates int `yaml:"size_estimates,optional,default=4"`
+}
+
+type PropertyRecvOptions struct {
+	Inherit  []zfsprop.Property          `yaml:"inherit,optional"`
+	Override map[zfsprop.Property]string `yaml:"override,optional"`
+}
+
+type PlaceholderRecvOptions struct {
+	Encryption string `yaml:"encryption,default=unspecified"`
+}
+
 type PushJob struct {
 	ActiveJob    `yaml:",inline"`
 	Snapshotting SnapshottingEnum  `yaml:"snapshotting"`
@@ -138,13 +187,10 @@ func (i *PositiveDurationOrManual) UnmarshalYAML(u func(interface{}, bool) error
 		return fmt.Errorf("value must not be empty")
 	default:
 		i.Manual = false
-		i.Interval, err = time.ParseDuration(s)
+		i.Interval, err = parsePositiveDuration(s)
 		if err != nil {
 			return err
 		}
-		if i.Interval <= 0 {
-			return fmt.Errorf("value must be a positive duration, got %q", s)
-		}
 	}
 	return nil
 }
@@ -178,8 +224,47 @@ type SnapshottingEnum struct {
 type SnapshottingPeriodic struct {
 	Type                    string            `yaml:"type"`
 	Prefix                  string            `yaml:"prefix"`
-	Interval time.Duration `yaml:"interval,positive"`
+	Interval                *PositiveDuration `yaml:"interval"`
 	Hooks                   HookList          `yaml:"hooks,optional"`
+	TimestampFormattingSpec `yaml:",inline"`
+}
+
+type TimestampFormattingSpec struct {
+	TimestampFormat   string `yaml:"timestamp_format,optional,default=dense"`
+	TimestampLocation string `yaml:"timestamp_location,optional,default=UTC"`
+}
+
+type CronSpec struct {
+	Schedule cron.Schedule
+}
+
+var _ yaml.Unmarshaler = &CronSpec{}
+
+func (s *CronSpec) UnmarshalYAML(unmarshal func(v interface{}, not_strict bool) error) error {
+	var specString string
+	if err := unmarshal(&specString, false); err != nil {
+		return err
+	}
+
+	// Use standard cron format.
+	// Disable the various "descriptors" (@daily, etc)
+	// They are just aliases to "top of hour", "midnight", etc.
+	parser := cron.NewParser(cron.Minute | cron.Hour | cron.Dom | cron.Month | cron.Dow | cron.SecondOptional)
+
+	sched, err := parser.Parse(specString)
+	if err != nil {
+		return errors.Wrap(err, "cron syntax invalid")
+	}
+	s.Schedule = sched
+	return nil
+}
+
+type SnapshottingCron struct {
+	Type                    string   `yaml:"type"`
+	Prefix                  string   `yaml:"prefix"`
+	Cron                    CronSpec `yaml:"cron"`
+	Hooks                   HookList `yaml:"hooks,optional"`
+	TimestampFormattingSpec `yaml:",inline"`
 }
 
 type SnapshottingManual struct {
@@ -221,18 +306,6 @@ type Global struct {
 	Serve      *GlobalServe           `yaml:"serve,optional,fromdefaults"`
 }
 
-func Default(i interface{}) {
-	v := reflect.ValueOf(i)
-	if v.Kind() != reflect.Ptr {
-		panic(v)
-	}
-	y := `{}`
-	err := yaml.Unmarshal([]byte(y), v.Interface())
-	if err != nil {
-		panic(err)
-	}
-}
-
 type ConnectEnum struct {
 	Ret interface{}
 }
@@ -399,14 +472,6 @@ type GlobalStdinServer struct {
 	SockDir string `yaml:"sockdir,default=/var/run/zrepl/stdinserver"`
 }
 
-type JobDebugSettings struct {
-	Conn *struct {
-		ReadDump  string `yaml:"read_dump"`
-		WriteDump string `yaml:"write_dump"`
-	} `yaml:"conn,optional"`
-	RPCLog bool `yaml:"rpc_log,optional,default=false"`
-}
-
 type HookList []HookEnum
 
 type HookEnum struct {
@@ -505,6 +570,7 @@ func (t *SnapshottingEnum) UnmarshalYAML(u func(interface{}, bool) error) (err e
 	t.Ret, err = enumUnmarshal(u, map[string]interface{}{
 		"periodic": &SnapshottingPeriodic{},
 		"manual":   &SnapshottingManual{},
+		"cron":     &SnapshottingCron{},
 	})
 	return
 }
@@ -593,8 +659,9 @@ var ConfigFileDefaultLocations = []string{
 	"/usr/local/etc/zrepl/zrepl.yml",
 }
 
-func ParseConfig(path string) (i *Config, err error) {
+func ParseConfig(path string) (rootConfig *Config, err error) {
 
+	// Parse main configuration file
 	if path == "" {
 		// Try default locations
 		for _, l := range ConfigFileDefaultLocations {
@@ -613,11 +680,94 @@ func ParseConfig(path string) (i *Config, err error) {
 
 	var bytes []byte
 
-	if bytes, err = ioutil.ReadFile(path); err != nil {
+	if bytes, err = os.ReadFile(path); err != nil {
 		return
 	}
 
-	return ParseConfigBytes(bytes)
+	rootConfig, err = ParseConfigBytes(bytes)
+	if err != nil {
+		return nil, err
+	}
+
+	err = expandConfigInclude(path, rootConfig)
+	if err != nil {
+		return nil, err
+	}
+
+	if err = validateJobNames(rootConfig); err != nil {
+		return nil, err
+	}
+
+	return rootConfig, err
+}
+
+func IsInternalJobName(s string) bool {
+	return strings.HasPrefix(s, "_")
+}
+
+func validateJobNames(config *Config) error {
+	seen := make(map[string]struct{})
+	for _, job := range config.Jobs {
+		name := job.Name()
+		if IsInternalJobName(name) {
+			return errors.Errorf("job name %q is reserved for internal use (starts with _)", name)
+		}
+		if _, ok := seen[name]; ok {
+			return errors.Errorf("duplicate job name %q", name)
+		}
+		seen[name] = struct{}{}
+	}
+	return nil
+}
+
+func expandConfigInclude(configPath string, config *Config) (err error) {
+	var includeConfigPaths []string
+	for _, path := range config.Include {
+		if !pathpkg.IsAbs(configPath) {
+			path = pathpkg.Join(pathpkg.Dir(configPath), path)
+		}
+
+		stat, statErr := os.Stat(path)
+		if statErr != nil {
+			return errors.Wrapf(statErr, "stat path %q", path)
+		}
+
+		if stat.Mode().IsDir() {
+			directoryPaths, err := filepath.Glob(path + "/*.yml")
+			if err != nil {
+				return err
+			}
+
+			includeConfigPaths = append(includeConfigPaths, directoryPaths...)
+		} else if stat.Mode().IsRegular() {
+			if extention := filepath.Ext(path); extention != ".yml" {
+				return fmt.Errorf("include config files must end with `.yml`: %s", path)
+			}
+			includeConfigPaths = append(includeConfigPaths, path)
+		} else {
+			return fmt.Errorf("not a file or directory: %s", path)
+		}
+	}
+
+	for _, path := range includeConfigPaths {
+		var bytes []byte
+		if bytes, err = os.ReadFile(path); err != nil {
+			return errors.Wrapf(err, "read file: %q", path)
+		}
+
+		includedConfig, err := ParseConfigBytes(bytes)
+		if err != nil {
+			return err
+		}
+
+		if len(includedConfig.Include) > 0 {
+			return errors.Errorf("included configuration files must not include other files: %s", path)
+		}
+
+		config.Jobs = append(config.Jobs, includedConfig.Jobs...)
+	}
+
+	return nil
 }
 
 func ParseConfigBytes(bytes []byte) (*Config, error) {
@@ -625,46 +775,16 @@ func ParseConfigBytes(bytes []byte) (*Config, error) {
 	if err := yaml.UnmarshalStrict(bytes, &c); err != nil {
 		return nil, err
 	}
+	if c != nil {
+		return c, nil
+	}
+	// There was no yaml document in the file, deserialize from default.
+	// => See TestFromdefaultsEmptyDoc in yaml-config package.
+	if err := yaml.UnmarshalStrict([]byte("{}"), &c); err != nil {
+		return nil, err
+	}
 	if c == nil {
-		return nil, fmt.Errorf("config is empty or only consists of comments")
+		panic("the fallback to deserialize from `{}` should work")
 	}
 	return c, nil
 }
-
-var durationStringRegex *regexp.Regexp = regexp.MustCompile(`^\s*(\d+)\s*(s|m|h|d|w)\s*$`)
-
-func parsePositiveDuration(e string) (d time.Duration, err error) {
-	comps := durationStringRegex.FindStringSubmatch(e)
-	if len(comps) != 3 {
-		err = fmt.Errorf("does not match regex: %s %#v", e, comps)
-		return
-	}
-
-	durationFactor, err := strconv.ParseInt(comps[1], 10, 64)
-	if err != nil {
-		return 0, err
-	}
-	if durationFactor <= 0 {
-		return 0, errors.New("duration must be positive integer")
-	}
-
-	var durationUnit time.Duration
-	switch comps[2] {
-	case "s":
-		durationUnit = time.Second
-	case "m":
-		durationUnit = time.Minute
-	case "h":
-		durationUnit = time.Hour
-	case "d":
-		durationUnit = 24 * time.Hour
-	case "w":
-		durationUnit = 24 * 7 * time.Hour
-	default:
-		err = fmt.Errorf("contains unknown time unit '%s'", comps[2])
-		return
-	}
-
-	d = time.Duration(durationFactor) * durationUnit
-	return
-}

internal/config/config_duration.go

@@ -0,0 +1,106 @@
+package config
+
+import (
+	"errors"
+	"fmt"
+	"regexp"
+	"strconv"
+	"time"
+
+	"github.com/kr/pretty"
+	"github.com/zrepl/yaml-config"
+)
+
+type Duration struct{ d time.Duration }
+
+func (d Duration) Duration() time.Duration { return d.d }
+
+var _ yaml.Unmarshaler = &Duration{}
+
+func (d *Duration) UnmarshalYAML(unmarshal func(v interface{}, not_strict bool) error) error {
+	var s string
+	err := unmarshal(&s, false)
+	if err != nil {
+		return err
+	}
+	d.d, err = parseDuration(s)
+	if err != nil {
+		d.d = 0
+		return &yaml.TypeError{Errors: []string{fmt.Sprintf("cannot parse value %q: %s", s, err)}}
+	}
+	return nil
+}
+
+type PositiveDuration struct{ d Duration }
+
+var _ yaml.Unmarshaler = &PositiveDuration{}
+
+func (d PositiveDuration) Duration() time.Duration { return d.d.Duration() }
+
+func (d *PositiveDuration) UnmarshalYAML(unmarshal func(v interface{}, not_strict bool) error) error {
+	err := d.d.UnmarshalYAML(unmarshal)
+	if err != nil {
+		return err
+	}
+	if d.d.Duration() <= 0 {
+		return fmt.Errorf("duration must be positive, got %s", d.d.Duration())
+	}
+	return nil
+}
+
+func parsePositiveDuration(e string) (time.Duration, error) {
+	d, err := parseDuration(e)
+	if err != nil {
+		return d, err
+	}
+	if d <= 0 {
+		return 0, errors.New("duration must be positive integer")
+	}
+	return d, err
+}
+
+var durationStringRegex *regexp.Regexp = regexp.MustCompile(`^\s*([\+-]?\d+)\s*(|s|m|h|d|w)\s*$`)
+
+func parseDuration(e string) (d time.Duration, err error) {
+	comps := durationStringRegex.FindStringSubmatch(e)
+	if comps == nil {
+		err = fmt.Errorf("must match %s", durationStringRegex)
+		return
+	}
+	if len(comps) != 3 {
+		panic(pretty.Sprint(comps))
+	}
+
+	durationFactor, err := strconv.ParseInt(comps[1], 10, 64)
+	if err != nil {
+		return 0, err
+	}
+
+	var durationUnit time.Duration
+	switch comps[2] {
+	case "":
+		if durationFactor != 0 {
+			err = fmt.Errorf("missing time unit")
+			return
+		} else {
+			// It's the case where user specified '0'.
+			// We want to allow this, just like time.ParseDuration.
+		}
+	case "s":
+		durationUnit = time.Second
+	case "m":
+		durationUnit = time.Minute
+	case "h":
+		durationUnit = time.Hour
+	case "d":
+		durationUnit = 24 * time.Hour
+	case "w":
+		durationUnit = 24 * 7 * time.Hour
+	default:
+		err = fmt.Errorf("contains unknown time unit '%s'", comps[2])
+		return
+	}
+
+	d = time.Duration(durationFactor) * durationUnit
+	return
+}

internal/config/config_global_test.go

@@ -70,9 +70,9 @@ func TestPrometheusMonitoring(t *testing.T) {
 global:
   monitoring:
     - type: prometheus
-      listen: ':9091'
+      listen: ':9811'
 `)
-	assert.Equal(t, ":9091", conf.Global.Monitoring[0].Ret.(*PrometheusMonitoring).Listen)
+	assert.Equal(t, ":9811", conf.Global.Monitoring[0].Ret.(*PrometheusMonitoring).Listen)
 }
 
 func TestSyslogLoggingOutletFacility(t *testing.T) {