replication: simplify parallel replication variables & expose them in config

closes #140

.circleci/config.yml

@@ -1,74 +1,79 @@
-version: 2.0
+version: 2.1
-workflows:
-  version: 2
-  build:
-    jobs:
-      - build-1.11
-      - build-1.12
-      - build-1.13
-      - build-1.14
-      - build-latest
-      - test-build-in-docker
-jobs:
 
-  # build-latest serves as the template
+commands:
-  # we use YAML anchors & aliases to exchange the docker image (and hence Go version used for the build)
+  setup-home-local-bin:
-  build-latest: &build-latest
-    description: Builds zrepl
-    parameters:
-      image:
-        description: "the docker image that the job should use"
-        type: string
-    docker:
-      - image: circleci/golang:latest
-    environment:
-      # required by lazy.sh
-      TERM: xterm
-    working_directory: /go/src/github.com/zrepl/zrepl
     steps:
       - run:
-          name: Setup environment variables
+          shell: /bin/bash -euo pipefail
           command: |
-            # used by pip (for docs)
+            mkdir -p "$HOME/.local/bin"
-            echo 'export PATH="$HOME/.local/bin:$PATH"' >> $BASH_ENV
+            line='export PATH="$HOME/.local/bin:$PATH"'
-            # we use modules
+            if grep "$line" $BASH_ENV >/dev/null; then
-            echo 'export GO111MODULE=on' >> $BASH_ENV
+              echo "$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
+
+  restore-cache-gomod:
+    steps:
       - restore_cache:
-          keys:
+          key: go-mod-v4-{{ checksum "go.sum" }}
-            - source
+  save-cache-gomod:
-            - protobuf
+    steps:
-
-      - checkout
-
       - save_cache:
-          key: source
+          key: go-mod-v4-{{ checksum "go.sum" }}
           paths:
-            - ".git"
+            - "/go/pkg/mod"
-      
+
-      # install deps
+  install-godep:
-      - run: wget https://github.com/protocolbuffers/protobuf/releases/download/v3.6.1/protoc-3.6.1-linux-x86_64.zip
+    steps:
-      - run: echo "6003de742ea3fcf703cfec1cd4a3380fd143081a2eb0e559065563496af27807  protoc-3.6.1-linux-x86_64.zip" | sha256sum -c
+      - apt-update-and-install-common-deps
-      - run: sudo unzip -d /usr protoc-3.6.1-linux-x86_64.zip
+      - 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
+
+  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: protobuf
+          key: minio-client-v2
           paths:
-            - "/usr/include/google/protobuf"
+            - "$HOME/.local/bin/mc"
-            
-      - run: sudo apt update && sudo apt install python3 python3-pip libgirepository1.0-dev gawk
-      - run: ./lazy.sh devsetup
-
-      - run: make zrepl-bin
-      - run: make vet
-      - run: make lint
-      - run: make release
-      - run: make test-go
-      # cannot run test-platform because circle-ci runs in linux containers
-
-      - store_artifacts:
-          path: ./artifacts/release
-          when: always
 
+  upload-minio:
+    parameters:
+      src:
+        type: string
+      dst:
+        type: string
+    steps:
       - run:
           shell: /bin/bash -eo pipefail
           when: always
@@ -78,80 +83,296 @@ jobs:
               exit 0
             fi
             set -u # from now on
-            
+
-            # Download and install minio
-            curl -sSL https://dl.minio.io/client/mc/release/linux-amd64/mc -o ${GOPATH}/bin/mc
-            chmod +x ${GOPATH}/bin/mc
             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>>/${CIRCLE_JOB}
+
             # Upload artifacts
-            echo "$CIRCLE_BUILD_URL" > ./artifacts/release/cirlceci_build_url
+            mkdir -p ./artifacts
-            mc cp -r artifacts/release "zrepl-minio/zrepl-ci-artifacts/${CIRCLE_SHA1}/${CIRCLE_JOB}/"
+            mc cp -r <<parameters.src>> "zrepl-minio/$jobprefix/<<parameters.dst>>"
 
-            # Push Artifact Link to GitHub
+  set-github-minio-status:
-            REPO="zrepl/zrepl"
+    parameters:
-            COMMIT="${CIRCLE_SHA1}"
+      context:
-            JOB_NAME="${CIRCLE_JOB}"
+        type: string
-            curl "https://api.github.com/repos/$REPO/statuses/$COMMIT" \
+      description:
-              -H "Content-Type: application/json" \
+        type: string
-              -H "Authorization: token $GITHUB_COMMIT_STATUS_TOKEN" \
+      minio-dst:
-              -X POST \
+        type: string
-              -d '{"context":"zrepl/publish-ci-artifacts", "state": "success", "description":"CI Build Artifacts for '"$JOB_NAME"'", "target_url":"https://minio.cschwarz.com/minio/zrepl-ci-artifacts/'"$COMMIT"'/"}'
+    steps:
-
-      # kick off binary packaging workflow
       - run:
           shell: /bin/bash -eo pipefail
           command: |
             if [ -n "$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."
+              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
-            GITHUB_ACCESS_TOKEN="$ZREPL_DEBIAN_BINARYPACKAGIN_TRIGGER_BUILD_GITHUB_TOKEN" .circleci/trigger_debian_binary_packaging_workflow.bash "$CIRCLE_SHA1" "${CIRCLE_JOB##build-}"
 
-  build-1.11:
+            # keep in sync with with upload-minio command
-    <<: *build-latest
+            jobprefix=zrepl-ci-artifacts/${CIRCLE_SHA1}-pipeline-<<pipeline.number>>/${CIRCLE_JOB}
-    docker:
+            # Push Artifact Link to GitHub
-    - image: circleci/golang:1.11
+            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"'"}'
 
-  build-1.12:
-    <<: *build-latest
-    docker:
-    - image: circleci/golang:1.12
 
-  build-1.13:
+  trigger-pipeline:
-    <<: *build-latest
+    parameters:
-    docker:
+      body_no_shell_subst:
-    - image: circleci/golang:1.13
+        type: string
-
-  build-1.14:
-    <<: *build-latest
-    docker:
-    - image: circleci/golang:1.14
-
-  # this job tries to mimic the build-in-docker instructions
-  # given in docs/installation.rst
-  #
-  # However, CircleCI doesn't support volume mounts, so we have to copy
-  # the source into the build-container by modifying the Dockerfile
-  test-build-in-docker:
-    description: Check that build-in-docker works
-    docker:
-      - image: circleci/golang:latest
-    environment:
-    working_directory: /go/src/github.com/zrepl/zrepl
     steps:
-    - checkout
+      - run: |
-    - setup_remote_docker
+          curl -X POST https://circleci.com/api/v2/project/github/zrepl/zrepl/pipeline \
-    - run:
+            -H 'Content-Type: application/json' \
-        name: (hacky) circleci doesn't allow volume mounts, so copy src to container
+            -H 'Accept: application/json' \
-        command: echo "ADD . /src" >> build.Dockerfile
+            -H "Circle-Token: $ZREPL_BOT_CIRCLE_TOKEN" \
-    - run:
+            --data '<<parameters.body_no_shell_subst>>'
-        name: (hacky) commit modified Dockerfile to avoid failing git clean check in Makefile
+
-        command: git -c user.name='circleci' -c user.email='circleci@localhost' commit -m 'CIRCLECI modified Dockerfile with zrepl src' --author 'autoauthor <circleci@localhost>' -- build.Dockerfile
+parameters:
-    - run:
+  do_ci:
-        name: build the build image (build deps)
+    type: boolean
-        command: docker build -t zrepl_build -f build.Dockerfile .
+    default: true
-    - run:
+
-        name: try compiling
+  do_release:
-        command: docker run -it zrepl_build make release
+    type: boolean
+    default: false
+
+  release_docker_baseimage_tag:
+    type: string
+    default: "1.16"
+
+workflows:
+  version: 2
+
+  ci:
+    when: << pipeline.parameters.do_ci >>
+    jobs:
+      - quickcheck-docs
+      - quickcheck-go: &quickcheck-go-smoketest
+          name: quickcheck-go-amd64-linux-1.16
+          goversion: &latest-go-release "1.16"
+          goos: linux
+          goarch: amd64
+      - test-go-on-latest-go-release:
+          goversion: *latest-go-release
+      - quickcheck-go:
+          requires:
+            - quickcheck-go-amd64-linux-1.16 #quickcheck-go-smoketest.name
+          matrix: &quickcheck-go-matrix
+            alias: quickcheck-go-matrix
+            parameters:
+              goversion: [*latest-go-release, "1.12"]
+              goos: ["linux", "freebsd"]
+              goarch: ["amd64", "arm64"]
+            exclude:
+              # don't re-do quickcheck-go-smoketest
+              - goversion: *latest-go-release
+                goos: linux
+                goarch: amd64
+              # not supported by Go 1.12
+              - goversion: "1.12"
+                goos: freebsd
+                goarch: arm64
+
+  release:
+    when: << pipeline.parameters.do_release >>
+    jobs:
+      - release-build
+      - release-deb:
+          requires:
+            - release-build
+      - release-rpm:
+          requires:
+            - release-build
+      - release-upload:
+          requires:
+            - release-build
+            - 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:
+    jobs:
+      - publish-zrepl-github-io:
+          filters:
+            branches:
+              only:
+                - stable
+
+jobs:
+  quickcheck-docs:
+    docker:
+      - image: cimg/base:2020.08
+    steps:
+      - checkout
+      - install-docdep
+      - 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 ${CIRCLE_JOB}
+          minio-dst: ""
+
+  quickcheck-go:
+    parameters:
+      goversion:
+        type: string
+      goos:
+        type: string
+      goarch:
+        type: string
+    docker:
+      - image: circleci/golang:<<parameters.goversion>>
+    environment:
+      GOOS: <<parameters.goos>>
+      GOARCH: <<parameters.goarch>>
+
+    steps:
+      - checkout
+
+      - restore-cache-gomod
+      - run: go mod download
+      - run: cd build && go mod download
+      - save-cache-gomod
+
+      - install-godep
+      - run: make formatcheck
+      - run: make generate-platform-test-list
+      - run: make zrepl-bin test-platform-bin
+      - run: make vet
+      - run: make lint
+
+      - download-and-install-minio-client
+      - run: rm -f artifacts/generate-platform-test-list
+      - store_artifacts:
+          path: artifacts
+      - upload-minio:
+          src: artifacts
+          dst: ""
+      - set-github-minio-status:
+          context: artifacts/${CIRCLE_JOB}
+          description: artifacts of CI job ${CIRCLE_JOB}
+          minio-dst: ""
+
+  test-go-on-latest-go-release:
+    parameters:
+      goversion:
+        type: string
+    docker:
+      - image: circleci/golang:<<parameters.goversion>>
+    steps:
+      - checkout
+      - restore-cache-gomod
+      - run: make test-go
+      # don't save-cache-gomod here, test-go doesn't pull all the dependencies
+
+  release-build:
+    machine: true
+    steps:
+      - checkout
+      - run: make release-docker RELEASE_DOCKER_BASEIMAGE_TAG=<<pipeline.parameters.release_docker_baseimage_tag>>
+      - persist_to_workspace:
+          root: .
+          paths: [.]
+  release-deb:
+    machine: true
+    steps:
+      - attach_workspace:
+          at: .
+      - run: make debs-docker
+      - persist_to_workspace:
+          root: .
+          paths:
+            - "artifacts/*.deb"
+
+  release-rpm:
+    machine: true
+    steps:
+      - attach_workspace:
+          at: .
+      - run: make rpms-docker
+      - persist_to_workspace:
+          root: .
+          paths:
+            - "artifacts/*.rpm"
+
+  release-upload:
+    docker:
+      - image: cimg/base:2020.08
+    steps:
+      - attach_workspace:
+          at: .
+      - 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 }}'
+
+  publish-zrepl-github-io:
+    docker:
+      - image: cimg/python:3.7
+    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

.travis.yml

@@ -1,70 +0,0 @@
-dist: xenial
-services:
-- docker
-
-env: # for allow_failures: https://docs.travis-ci.com/user/customizing-the-build/
-matrix:
-  include:
-
-  - language: go
-    name: "Build in Docker (docs/installation.rst)"
-    script:
-    - sudo docker build -t zrepl_build -f build.Dockerfile .
-    - |
-      sudo docker run -it --rm \
-        -v "${PWD}:/go/src/github.com/zrepl/zrepl" \
-        --user "$(id -u):$(id -g)" \
-        zrepl_build make vendordeps release
-
-  - &zrepl_build_template
-    language: go
-    go_import_path: github.com/zrepl/zrepl
-    before_install:
-        - wget https://github.com/protocolbuffers/protobuf/releases/download/v3.6.1/protoc-3.6.1-linux-x86_64.zip
-        - echo "6003de742ea3fcf703cfec1cd4a3380fd143081a2eb0e559065563496af27807  protoc-3.6.1-linux-x86_64.zip" | sha256sum -c
-        - sudo unzip -d /usr protoc-3.6.1-linux-x86_64.zip
-        - ./lazy.sh godep
-        - make vendordeps
-    script:
-      - make
-      - make vet
-      - make test
-      - make lint
-      - make artifacts/zrepl-freebsd-amd64
-      - make artifacts/zrepl-linux-amd64
-      - make artifacts/zrepl-darwin-amd64
-    go:
-    - "1.11"
-
-  - <<: *zrepl_build_template
-    go:
-    - "1.12"
-
-  - <<: *zrepl_build_template
-    go:
-    - "master"
-
-  - &zrepl_docs_template 
-    language: python
-    python:
-    - "3.4"
-    install:
-    - sudo apt-get install libgirepository1.0-dev
-    - pip install -r docs/requirements.txt
-    script:
-    - make docs
-  - <<: *zrepl_docs_template
-    python:
-    - "3.5"
-  - <<: *zrepl_docs_template
-    python:
-    - "3.6"
-  - <<: *zrepl_docs_template
-    python:
-    - "3.7"
-  
-
-  allow_failures:
-  - <<: *zrepl_build_template
-    go:
-    - "master"

Makefile

@@ -28,6 +28,8 @@ GO_BUILDFLAGS := $(GO_MOD_READONLY) $(GO_EXTRA_BUILDFLAGS)
 GO_BUILD := $(GO_ENV_VARS) $(GO) build $(GO_BUILDFLAGS) -ldflags $(GO_LDFLAGS)
 GOLANGCI_LINT := golangci-lint
 GOCOVMERGE := gocovmerge
+RELEASE_DOCKER_BASEIMAGE_TAG ?= 1.16
+RELEASE_DOCKER_BASEIMAGE ?= golang:$(RELEASE_DOCKER_BASEIMAGE_TAG)
 
 ifneq ($(GOARM),)
 	ZREPL_TARGET_TUPLE := $(GOOS)-$(GOARCH)v$(GOARM)
@@ -57,6 +59,85 @@ ifeq (SIGN, 1)
 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) \
+		zrepl_release \
+		make release GOOS=$(GOOS) GOARCH=$(GOARCH) GOARM=$(GOARM)
+
+debs-docker:
+	$(MAKE) _debs_or_rpms_docker _DEB_OR_RPM=deb
+rpms-docker:
+	$(MAKE) _debs_or_rpms_docker _DEB_OR_RPM=rpm
+_debs_or_rpms_docker: # artifacts/_zrepl.zsh_completion artifacts/bash_completion docs zrepl-bin
+	$(MAKE) $(_DEB_OR_RPM)-docker GOOS=linux GOARCH=amd64
+	$(MAKE) $(_DEB_OR_RPM)-docker GOOS=linux GOARCH=arm64
+	$(MAKE) $(_DEB_OR_RPM)-docker GOOS=linux GOARCH=arm GOARM=7
+	$(MAKE) $(_DEB_OR_RPM)-docker GOOS=linux GOARCH=386
+
+rpm: $(ARTIFACTDIR) # artifacts/_zrepl.zsh_completion artifacts/bash_completion docs zrepl-bin
+	$(eval _ZREPL_RPM_VERSION := $(subst -,.,$(_ZREPL_VERSION)))
+	$(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 >  $(_ZREPL_RPM_TOPDIR_ABS)/SPECS/zrepl.spec
+
+	# see /usr/lib/rpm/platform
+ifeq ($(GOARCH),amd64)
+	$(eval _ZREPL_RPMBUILD_TARGET := x86_64)
+else ifeq ($(GOARCH), 386)
+	$(eval _ZREPL_RPMBUILD_TARGET := i386)
+else ifeq ($(GOARCH), arm64)
+	$(eval _ZREPL_RPMBUILD_TARGET := aarch64)
+else ifeq ($(GOARCH), arm)
+	$(eval _ZREPL_RPMBUILD_TARGET := armv7hl)
+else
+	$(eval _ZREPL_RPMBUILD_TARGET := $(GOARCH))
+endif
+	rpmbuild \
+		--build-in-place \
+		--define "_sourcedir $(CURDIR)" \
+		--define "_topdir $(_ZREPL_RPM_TOPDIR_ABS)" \
+		--define "_zrepl_binary_filename zrepl-$(ZREPL_TARGET_TUPLE)" \
+		--target $(_ZREPL_RPMBUILD_TARGET) \
+		-bb "$(_ZREPL_RPM_TOPDIR_ABS)"/SPECS/zrepl.spec
+	cp "$(_ZREPL_RPM_TOPDIR_ABS)"/RPMS/$(_ZREPL_RPMBUILD_TARGET)/zrepl-$(_ZREPL_RPM_VERSION)*.rpm $(ARTIFACTDIR)/
+
+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)
+
+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))"; \
+		export VERSION="$${VERSION#v}"; \
+		sed -i 's/VERSION/'"$$VERSION"'/' packaging/deb/debian/changelog
+
+ifeq ($(GOARCH), arm)
+	$(eval  DEB_HOST_ARCH := armhf)
+else ifeq ($(GOARCH), 386)
+	$(eval DEB_HOST_ARCH := i386)
+else
+	$(eval DEB_HOST_ARCH := $(GOARCH))
+endif
+
+	export ZREPL_DPKG_ZREPL_BINARY_FILENAME=zrepl-$(ZREPL_TARGET_TUPLE); \
+		dpkg-buildpackage -b --no-sign --host-arch $(DEB_HOST_ARCH)
+	cp ../*.deb artifacts/
+
+deb-docker:
+	docker build -t zrepl_debian_pkg --pull -f packaging/deb/Dockerfile .
+	docker run --rm -i -v $(CURDIR):/build/src -u $$(id -u):$$(id -g) \
+		zrepl_debian_pkg \
+		make deb GOOS=$(GOOS) GOARCH=$(GOARCH) GOARM=$(GOARM)
+
 # expects `release` target to have run before
 NOARCH_TARBALL := $(ARTIFACTDIR)/zrepl-noarch.tar
 wrapup-and-checksum:
@@ -147,26 +228,41 @@ zrepl-bin:
 generate-platform-test-list:
 	$(GO_BUILD) -o $(ARTIFACTDIR)/generate-platform-test-list ./platformtest/tests/gen
 
-test-platform-bin:
+COVER_PLATFORM_BIN_PATH := $(ARTIFACTDIR)/platformtest-cover-$(ZREPL_TARGET_TUPLE)
+cover-platform-bin:
 	$(GO_ENV_VARS) $(GO) test $(GO_BUILDFLAGS) \
-		-c -o "$(ARTIFACTDIR)/platformtest-$(ZREPL_TARGET_TUPLE)" \
+		-c -o "$(COVER_PLATFORM_BIN_PATH)" \
 		-covermode=atomic -cover -coverpkg github.com/zrepl/zrepl/... \
 		./platformtest/harness
+cover-platform:
+	# do not track dependency on cover-platform-bin to allow build of binary outside of test VM
+	export _TEST_PLATFORM_CMD="$(COVER_PLATFORM_BIN_PATH) \
+		-test.coverprofile \"$(ARTIFACTDIR)/platformtest.cover\" \
+		-test.v \
+		__DEVEL--i-heard-you-like-tests"; \
+		$(MAKE) _test-or-cover-platform-impl
+
+TEST_PLATFORM_BIN_PATH := $(ARTIFACTDIR)/platformtest-$(ZREPL_TARGET_TUPLE)
+test-platform-bin:
+	$(GO_BUILD) -o "$(TEST_PLATFORM_BIN_PATH)" ./platformtest/harness
+test-platform:
+	export _TEST_PLATFORM_CMD="\"$(TEST_PLATFORM_BIN_PATH)\""; \
+		$(MAKE) _test-or-cover-platform-impl
 
 ZREPL_PLATFORMTEST_POOLNAME := zreplplatformtest
 ZREPL_PLATFORMTEST_IMAGEPATH := /tmp/zreplplatformtest.pool.img
 ZREPL_PLATFORMTEST_MOUNTPOINT := /tmp/zreplplatformtest.pool
 ZREPL_PLATFORMTEST_ZFS_LOG := /tmp/zreplplatformtest.zfs.log
 # ZREPL_PLATFORMTEST_STOP_AND_KEEP := -failure.stop-and-keep-pool
-ZREPL_PLATFORMTEST_ARGS := 
+ZREPL_PLATFORMTEST_ARGS :=
-test-platform: $(ARTIFACTDIR) # do not track dependency on test-platform-bin to allow build of platformtest outside of test VM
+_test-or-cover-platform-impl: $(ARTIFACTDIR)
+ifndef _TEST_PLATFORM_CMD
+	$(error _TEST_PLATFORM_CMD is undefined, caller 'cover-platform' or 'test-platform' should have defined it)
+endif
 	rm -f "$(ZREPL_PLATFORMTEST_ZFS_LOG)"
 	rm -f "$(ARTIFACTDIR)/platformtest.cover"
 	platformtest/logmockzfs/logzfsenv "$(ZREPL_PLATFORMTEST_ZFS_LOG)" `which zfs` \
-	"$(ARTIFACTDIR)/platformtest-$(ZREPL_TARGET_TUPLE)" \
+		$(_TEST_PLATFORM_CMD) \
-		-test.coverprofile "$(ARTIFACTDIR)/platformtest.cover" \
-		-test.v \
-		__DEVEL--i-heard-you-like-tests \
 		-poolname "$(ZREPL_PLATFORMTEST_POOLNAME)" \
 		-imagepath "$(ZREPL_PLATFORMTEST_IMAGEPATH)" \
 		-mountpoint "$(ZREPL_PLATFORMTEST_MOUNTPOINT)" \
@@ -178,22 +274,32 @@ cover-merge: $(ARTIFACTDIR)
 cover-html: cover-merge
 	$(GO) tool cover -html "$(ARTIFACTDIR)/merged.cover" -o "$(ARTIFACTDIR)/merged.cover.html"
 
-test-full:
+cover-full:
 	test "$$(id -u)" = "0" || echo "MUST RUN AS ROOT" 1>&2
 	$(MAKE) test-go COVER=1
-	$(MAKE) test-platform
+	$(MAKE) cover-platform-bin
+	$(MAKE) cover-platform
 	$(MAKE) cover-html
 
 ##################### DEV TARGETS #####################
 # not part of the build, must do that manually
-.PHONY: generate format
+.PHONY: generate formatcheck format
 
 generate: generate-platform-test-list
-	protoc -I=replication/logic/pdu --go_out=plugins=grpc:replication/logic/pdu replication/logic/pdu/pdu.proto
+	protoc -I=replication/logic/pdu --go_out=replication/logic/pdu --go-grpc_out=replication/logic/pdu replication/logic/pdu/pdu.proto
+	protoc -I=rpc/grpcclientidentity/example --go_out=rpc/grpcclientidentity/example/pdu --go-grpc_out=rpc/grpcclientidentity/example/pdu rpc/grpcclientidentity/example/grpcauth.proto
 	$(GO_ENV_VARS) $(GO) generate $(GO_BUILDFLAGS) -x ./...
 
+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'
+
+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
+
 format:
-	goimports -srcdir . -local 'github.com/zrepl/zrepl' -w $(shell find . -type f -name '*.go' -not -path "./vendor/*" -not -name '*.pb.go' -not -name '*_enumer.go')
+	@ $(GOIMPORTS) -w -d $(shell  $(FINDSRCFILES))
 
 ##################### NOARCH #####################
 .PHONY: noarch $(ARTIFACTDIR)/bash_completion $(ARTIFACTDIR)/_zrepl.zsh_completion $(ARTIFACTDIR)/go_env.txt docs docs-clean
@@ -217,11 +323,14 @@ $(ARTIFACTDIR)/_zrepl.zsh_completion:
 
 $(ARTIFACTDIR)/go_env.txt:
 	$(GO_ENV_VARS) $(GO) env > $@
+	$(GO) version >> $@
 
 docs: $(ARTIFACTDIR)/docs
+	# https://www.sphinx-doc.org/en/master/man/sphinx-build.html
 	make -C docs \
 		html \
 		BUILDDIR=../artifacts/docs \
+		SPHINXOPTS="-W --keep-going -n"
 
 docs-clean:
 	make -C docs \

README.md

@@ -1,7 +1,7 @@
 [![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/)
 [![User Docs](https://img.shields.io/badge/docs-web-blue.svg)](https://zrepl.github.io)
-[![Donate via Patreon](https://img.shields.io/endpoint.svg?url=https%3A%2F%2Fshieldsio-patreon.herokuapp.com%2Fzrepl%2Fpledges&style=flat&color=yellow)](https://www.patreon.com/zrepl)
+[![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)
 [![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)
@@ -21,7 +21,7 @@ zrepl is a one-stop ZFS backup & replication solution.
 
 ## Feature Requests
 
-1. Does you feature request require default values / some kind of configuration?
+1. Does your feature request require default values / some kind of configuration?
    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.
@@ -30,20 +30,12 @@ zrepl is a one-stop ZFS backup & replication solution.
 The above does not apply if you already implemented everything.
 Check out the *Coding Workflow* section below for details.
 
-## Package Maintainer Information
+## Building, Releasing, Downstream-Packaging
 
-* Follow the steps in `docs/installation.rst -> Compiling from Source` and read the Makefile / shell scripts used in this process.
+This section provides an overview of the zrepl build & release process.
-* Make sure your distro is compatible with the paths in `docs/installation.rst`.
+Check out `docs/installation/compile-from-source.rst` for build-from-source instructions.
-* 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.
-* Ship other material provided in `./dist`, e.g. in `/usr/share/zrepl/`.
-* Use `make release ZREPL_VERSION='mydistro-1.2.3_1'`
-    * Your distro's name and any versioning supplemental to zrepl's (e.g. package revision) should be in this string
-* Use `sudo make test-platform` **on a test system** to validate that zrepl's abstractions on top of ZFS work with the system ZFS.
-* Make sure you are informed about new zrepl versions, e.g. by subscribing to GitHub's release RSS feed.
 
-## Developer Documentation
+### Overview
 
 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.
@@ -60,60 +52,61 @@ 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.
 
-### Project Structure
+### Build & Release Process
 
-```
+**The `Makefile` is catering to the needs of developers & CI, not distro packagers**.
-├── artifacts               # build artifcats generate by make
+It provides phony targets for
-├── cli                     # wrapper around CLI package cobra
+* local development (building, running tests, etc)
-├── client                  # all subcommands that are not `daemon`
+* building a release in Docker (used by the CI & release management)
-├── config                  # config data types (=> package yaml-config)
+* building .deb and .rpm packages out of the release artifacts.
-│   └── samples
-├── daemon                  # the implementation of `zrepl daemon` subcommand
-│   ├── filters
-│   ├── hooks               # snapshot hooks
-│   ├── job                 # job implementations
-│   ├── logging             # logging outlets + formatters
-│   ├── nethelpers
-│   ├── prometheus
-│   ├── pruner              # pruner implementation
-│   ├── snapper             # snapshotter implementation
-├── dist                    # supplemental material for users & package maintainers
-├── docs                    # sphinx-based documentation
-│   ├── **/*.rst            # documentation in reStructuredText
-│   ├── sphinxconf
-│   │   └── conf.py         # sphinx config (see commit 445a280 why its not in docs/)
-│   ├── requirements.txt    # pip3 requirements to build documentation
-│   ├── publish.sh          # shell script for automated rendering & deploy to zrepl.github.io repo
-│   └── public_git          # checkout of zrepl.github.io managed by above shell script
-├── endpoint                # implementation of replication endpoints (=> package replication)
-├── logger                  # our own logger package
-├── platformtest            # test suite for our zfs abstractions (error classification, etc)
-├── pruning                 # pruning rules (the logic, not the actual execution)
-│   └── retentiongrid
-├── replication
-│   ├── driver              # the driver of the replication logic (status reporting, error handling)
-│   ├── logic               # planning & executing replication steps via rpc
-|   |   └── pdu             # the generated gRPC & protobuf code used in replication (and endpoints)
-│   └── report              # the JSON-serializable report datastructures exposed to the client
-├── rpc                     # the hybrid gRPC + ./dataconn RPC client: connects to a remote replication.Endpoint
-│   ├── dataconn            # Bulk data-transfer RPC protocol
-│   ├── grpcclientidentity  # adaptor to inject package transport's 'client identity' concept into gRPC contexts
-│   ├── netadaptor          # adaptor to convert a package transport's Connecter and Listener into net.* primitives
-│   ├── transportmux        # TCP connecter and listener used to split control & data traffic
-│   └── versionhandshake    # replication protocol version handshake perfomed on newly established connections
-├── tlsconf                 # abstraction for Go TLS server + client config
-├── transport               # transport implementations
-│   ├── fromconfig
-│   ├── local
-│   ├── ssh
-│   ├── tcp
-│   └── tls
-├── util
-├── version                 # abstraction for versions (filled during build by Makefile)
-└── zfs                     # zfs(8) wrappers
-```
 
-### Coding Workflow
+**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.
+The procedure to issue a release is as follows:
+* Issue the source release:
+  * Git tag the release on the `master` branch.
+  * Push the tag.
+  * Run `./docs/publish.sh` to re-build & push zrepl.github.io.
+* Issue the official binary release:
+  * Run the `release` pipeline (triggered via CircleCI API)
+  * 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.
+
+**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.
+
+### Additional Notes to Distro Package Maintainers
+
+* 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.
+* 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.
+* Ship other material provided in `./dist`, e.g. in `/usr/share/zrepl/`.
+* Have a look at the `Makefile`'s `ZREPL_VERSION` variable and how it passed to Go's `ldFlags`.
+  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
@@ -123,9 +116,6 @@ An HTML report can be generated using `make cover-html`.
 
 Backward-incompatible changes must be documented in the git commit message and are listed in `docs/changelog.rst`.
 
-* Config-breaking changes must contain a line `BREAK CONFIG` in the commit message
-* Other breaking changes must contain a line `BREAK` in the commit message
-
 ### Glossary & Naming Inconsistencies
 
 In ZFS, *dataset* refers to the objects *filesystem*, *ZVOL* and *snapshot*. <br />
@@ -142,16 +132,3 @@ variables and types are often named *dataset* when they in fact refer to a *file
 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.
-
-### RPC debugging
-
-Optionally, there are various RPC-related environment variables, that if set to something != `""` will produce additional debug output on stderr:
-
-https://github.com/zrepl/zrepl/blob/master/rpc/rpc_debug.go#L11
-
-https://github.com/zrepl/zrepl/blob/master/rpc/dataconn/dataconn_debug.go#L11
-
-https://github.com/zrepl/zrepl/blob/master/rpc/dataconn/stream/stream_debug.go#L11
-
-https://github.com/zrepl/zrepl/blob/master/rpc/dataconn/heartbeatconn/heartbeatconn_debug.go#L11
-

build.Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:latest
+FROM !SUBSTITUTED_BY_MAKEFILE
 
 RUN apt-get update && apt-get install -y \
     python3-pip \

build/go.mod

@@ -3,50 +3,14 @@ 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/golangci/golangci-lint v1.35.2
-	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/wadey/gocovmerge v0.0.0-20160331181800-b5bfa59ec0ad
-	github.com/stretchr/testify v1.4.0 // indirect
+	golang.org/x/tools v0.0.0-20210105210202-9ed45478a130
-	github.com/wadey/gocovmerge v0.0.0-20160331181800-b5bfa59ec0ad // indirect
+	google.golang.org/grpc/cmd/protoc-gen-go-grpc v1.1.0 // indirect
-	golang.org/x/net v0.0.0-20190613194153-d28f0bde5980 // indirect
+	google.golang.org/protobuf v1.25.0
-	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

@@ -1,66 +1,133 @@
+4d63.com/gochecknoglobals v0.0.0-20201008074935-acfc0b28355a h1:wFEQiK85fRsEVF0CRrPAos5LoAryUsIX1kPW/WrIqFw=
+4d63.com/gochecknoglobals v0.0.0-20201008074935-acfc0b28355a/go.mod h1:wfdC5ZjKSPr7CybKEcgJhUOgeAQW1+7WcyK8OvUilfo=
+cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU=
+cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU=
+cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY=
+cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc=
+cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0=
+cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o=
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+google.golang.org/protobuf v1.21.0/go.mod h1:47Nbq4nVaFHyn7ilMalzfO3qCViNmqZ2kzikPIcrTAo=
+google.golang.org/protobuf v1.22.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
+google.golang.org/protobuf v1.23.0 h1:4MY060fB1DLGMB/7MBTLnwQUY6+F09GEiz6SsrNqyzM=
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 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 h1:qIbj1fsPNlZgppZ+VLlY7N33q108Sa+fhmuc+sWQYwY=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
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 gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
 gopkg.in/fsnotify.v1 v1.4.7 h1:xOHLXZwVvI9hhs+cLKq5+I5onOuwQLhQwiu63xxlHs4=
 gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
-gopkg.in/gemnasium/logrus-airbrake-hook.v2 v2.1.2/go.mod h1:Xk6kEKp8OKb+X14hQBKWaSkCsqBpgog8nAV2xsGOxlo=
+gopkg.in/ini.v1 v1.51.0 h1:AQvPpx3LzTDM0AjnIRlVFwFFGC+npRopjZxLJj6gdno=
+gopkg.in/ini.v1 v1.51.0/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k=
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 gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 h1:uRGJdciOHaEIrze2W8Q3AKkepLTh2hOroT7a+7czfdQ=
 gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
 gopkg.in/yaml.v2 v2.0.0-20170812160011-eb3733d160e7/go.mod h1:JAlM8MvJe8wmxCU4Bli9HhUf9+ttbYbLASfIpnQbh74=
 gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
+gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
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+honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
+honnef.co/go/tools v0.0.1-2020.1.6 h1:W18jzjh8mfPez+AwGLxmOImucz/IFjpNlrKVnaj2YVc=
+honnef.co/go/tools v0.0.1-2020.1.6/go.mod h1:pyyisuGw24ruLjrr1ddx39WE0y9OooInRzEYLhQB2YY=
+mvdan.cc/gofumpt v0.1.0 h1:hsVv+Y9UsZ/mFZTxJZuHVI6shSQCtzZ11h1JEFPAZLw=
+mvdan.cc/gofumpt v0.1.0/go.mod h1:yXG1r1WqZVKWbVRtBWKWX9+CxGYfA51nSomhM0woR48=
 mvdan.cc/interfacer v0.0.0-20180901003855-c20040233aed h1:WX1yoOaKQfddO/mLzdV4wptyWgoH/6hwLs7QHTixo0I=
 mvdan.cc/interfacer v0.0.0-20180901003855-c20040233aed/go.mod h1:Xkxe497xwlCKkIaQYRfC7CSLworTXY9RMqwhhCm+8Nc=
 mvdan.cc/lint v0.0.0-20170908181259-adc824a0674b h1:DxJ5nJdkhDlLok9K6qO+5290kphDJbHOQO1DFFFTeBo=
 mvdan.cc/lint v0.0.0-20170908181259-adc824a0674b/go.mod h1:2odslEg/xrtNQqCYg2/jCoyKnw3vv5biOc3JnIcYfL4=
-mvdan.cc/unparam v0.0.0-20190209190245-fbb59629db34/go.mod h1:H6SUd1XjIs+qQCyskXg5OFSrilMRUkD8ePJpHKDPaeY=
+mvdan.cc/unparam v0.0.0-20200501210554-b37ab49443f7 h1:kAREL6MPwpsk1/PQPFD3Eg7WAQR5mPTWZJaBiG5LDbY=
-mvdan.cc/unparam v0.0.0-20190310220240-1b9ccfa71afe h1:Ekmnp+NcP2joadI9pbK4Bva87QKZSeY7le//oiMrc9g=
+mvdan.cc/unparam v0.0.0-20200501210554-b37ab49443f7/go.mod h1:HGC5lll35J70Y5v7vCGb9oLhHoScFwkHDJm/05RdSTc=
-mvdan.cc/unparam v0.0.0-20190310220240-1b9ccfa71afe/go.mod h1:BnhuWBAqxH3+J5bDybdxgw5ZfS+DsVd4iylsKQePN8o=
+rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
-sourcegraph.com/sqs/pbtypes v0.0.0-20180604144634-d3ebe8f20ae4/go.mod h1:ketZ/q3QxT9HOBeFhu6RdvsftgpsbFHBF5Cas6cDKZ0=
-sourcegraph.com/sqs/pbtypes v1.0.0 h1:f7lAwqviDEGvON4kRv0o5V7FT/IQK+tbkF664XMbP3o=
-sourcegraph.com/sqs/pbtypes v1.0.0/go.mod h1:3AciMUv4qUuRHRHhOG4TZOB+72GdPVz5k+c648qsFS4=

build/tools.go

@@ -2,11 +2,13 @@
 
 package main
 
+// the lines are parsed by lazy.sh, do not edit
 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"
+	_ "google.golang.org/grpc/cmd/protoc-gen-go-grpc"
+	_ "google.golang.org/protobuf/cmd/protoc-gen-go"
 )

cli/cli.go

@@ -7,6 +7,7 @@ import (
 
 	"github.com/spf13/cobra"
 	"github.com/spf13/pflag"
+
 	"github.com/zrepl/zrepl/daemon/logging/trace"
 
 	"github.com/zrepl/zrepl/config"

client/status.go

@@ -480,6 +480,11 @@ func (t *tui) renderReplicationReport(rep *report.Report, history *bytesProgress
 			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 {

client/zfsabstractions_list.go

@@ -52,9 +52,9 @@ func doZabsList(ctx context.Context, sc *cli.Subcommand, args []string) error {
 	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)

config/config.go

@@ -12,6 +12,8 @@ import (
 
 	"github.com/pkg/errors"
 	"github.com/zrepl/yaml-config"
+
+	zfsprop "github.com/zrepl/zrepl/zfs/property"
 )
 
 type Config struct {
@@ -77,19 +79,28 @@ type SnapJob struct {
 }
 
 type SendOptions struct {
-	Encrypted bool `yaml:"encrypted,optional,default=false"`
+	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:"embbeded_data,optional,default=false"`
+	Saved            bool `yaml:"saved,optional,default=false"`
 }
 
 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"`
 }
 
 type Replication struct {
-	Protection *ReplicationOptionsProtection `yaml:"protection,optional,fromdefaults"`
+	Protection  *ReplicationOptionsProtection  `yaml:"protection,optional,fromdefaults"`
+	Concurrency *ReplicationOptionsConcurrency `yaml:"concurrency,optional,fromdefaults"`
 }
 
 type ReplicationOptionsProtection struct {
@@ -97,6 +108,20 @@ 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"`
+}
+
+func (l *RecvOptions) SetDefault() {
+	*l = RecvOptions{Properties: &PropertyRecvOptions{}}
+}
+
+type PropertyRecvOptions struct {
+	Inherit  []zfsprop.Property          `yaml:"inherit,optional"`
+	Override map[zfsprop.Property]string `yaml:"override,optional"`
+}
+
 type PushJob struct {
 	ActiveJob    `yaml:",inline"`
 	Snapshotting SnapshottingEnum  `yaml:"snapshotting"`
@@ -324,6 +349,7 @@ type PruneKeepNotReplicated struct {
 type PruneKeepLastN struct {
 	Type  string `yaml:"type"`
 	Count int    `yaml:"count"`
+	Regex string `yaml:"regex,optional"`
 }
 
 type PruneKeepRegex struct { // FIXME rename to KeepRegex

config/config_recv_test.go

@@ -0,0 +1,134 @@
+package config
+
+import (
+	"fmt"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+
+	zfsprop "github.com/zrepl/zrepl/zfs/property"
+)
+
+func TestRecvOptions(t *testing.T) {
+	tmpl := `
+jobs:
+- name: foo
+  type: pull
+  connect:
+    type: local
+    listener_name: foo
+    client_identity: bar
+  root_fs: "zreplplatformtest"
+  %s
+  interval: manual
+  pruning:
+    keep_sender:
+    - type: last_n
+      count: 10
+    keep_receiver:
+    - type: last_n
+      count: 10
+
+`
+
+	recv_properties_empty := `
+  recv:
+    properties:
+`
+
+	recv_inherit_empty := `
+  recv:
+    properties:
+      inherit:
+`
+
+	recv_inherit := `
+  recv:
+    properties:
+      inherit:
+        - testprop
+`
+
+	recv_override_empty := `
+  recv:
+    properties:
+      override:
+`
+
+	recv_override := `
+  recv:
+    properties:
+      override:
+        testprop2: "test123"
+`
+
+	recv_override_and_inherit := `
+  recv:
+    properties:
+      inherit:
+        - testprop
+      override:
+        testprop2: "test123"
+`
+
+	recv_empty := `
+  recv: {}
+`
+
+	recv_not_specified := `
+`
+
+	fill := func(s string) string { return fmt.Sprintf(tmpl, s) }
+
+	t.Run("recv_inherit_empty", func(t *testing.T) {
+		c := testValidConfig(t, fill(recv_inherit_empty))
+		assert.NotNil(t, c)
+	})
+
+	t.Run("recv_inherit", func(t *testing.T) {
+		c := testValidConfig(t, fill(recv_inherit))
+		inherit := c.Jobs[0].Ret.(*PullJob).Recv.Properties.Inherit
+		assert.NotEmpty(t, inherit)
+		assert.Contains(t, inherit, zfsprop.Property("testprop"))
+	})
+
+	t.Run("recv_override_empty", func(t *testing.T) {
+		c := testValidConfig(t, fill(recv_override_empty))
+		assert.NotNil(t, c)
+	})
+
+	t.Run("recv_override", func(t *testing.T) {
+		c := testValidConfig(t, fill(recv_override))
+		override := c.Jobs[0].Ret.(*PullJob).Recv.Properties.Override
+		require.Len(t, override, 1)
+		require.Equal(t, "test123", override["testprop2"])
+
+	})
+
+	t.Run("recv_override_and_inherit", func(t *testing.T) {
+		c := testValidConfig(t, fill(recv_override_and_inherit))
+		inherit := c.Jobs[0].Ret.(*PullJob).Recv.Properties.Inherit
+		override := c.Jobs[0].Ret.(*PullJob).Recv.Properties.Override
+		assert.NotEmpty(t, inherit)
+		assert.Contains(t, inherit, zfsprop.Property("testprop"))
+		assert.NotEmpty(t, override)
+		assert.Equal(t, "test123", override["testprop2"])
+	})
+
+	t.Run("recv_properties_empty", func(t *testing.T) {
+		c := testValidConfig(t, fill(recv_properties_empty))
+		assert.NotNil(t, c)
+	})
+
+	t.Run("recv_empty", func(t *testing.T) {
+		c := testValidConfig(t, fill(recv_empty))
+		assert.NotNil(t, c)
+	})
+
+	t.Run("send_not_specified", func(t *testing.T) {
+		c := testValidConfig(t, fill(recv_not_specified))
+		assert.NotNil(t, c)
+	})
+
+}

config/config_send_test.go

@@ -38,7 +38,41 @@ jobs:
     encrypted: true
 `
 
-	encrypted_unspecified := `
+	raw_true := `
+  send:
+    raw: true
+
+`
+
+	raw_false := `
+  send:
+    raw: false
+
+`
+
+	raw_and_encrypted := `
+  send:
+    encrypted: true
+    raw: true
+`
+
+	properties_and_encrypted := `
+  send:
+    encrypted: true
+    send_properties: true
+`
+
+	properties_true := `
+  send:
+    send_properties: true
+`
+
+	properties_false := `
+  send:
+    send_properties: false
+`
+
+	send_empty := `
   send: {}
 `
 
@@ -46,28 +80,66 @@ jobs:
 `
 
 	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))
+		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))
+		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) {
+	t.Run("send_empty", func(t *testing.T) {
-		c = testValidConfig(t, fill(encrypted_unspecified))
+		c := testValidConfig(t, fill(send_empty))
 		encrypted := c.Jobs[0].Ret.(*PushJob).Send.Encrypted
 		assert.Equal(t, false, encrypted)
 	})
 
+	t.Run("properties_and_encrypted", func(t *testing.T) {
+		c := testValidConfig(t, fill(properties_and_encrypted))
+		encrypted := c.Jobs[0].Ret.(*PushJob).Send.Encrypted
+		properties := c.Jobs[0].Ret.(*PushJob).Send.SendProperties
+		assert.Equal(t, true, encrypted)
+		assert.Equal(t, true, properties)
+	})
+
+	t.Run("properties_false", func(t *testing.T) {
+		c := testValidConfig(t, fill(properties_false))
+		properties := c.Jobs[0].Ret.(*PushJob).Send.SendProperties
+		assert.Equal(t, false, properties)
+	})
+
+	t.Run("properties_true", func(t *testing.T) {
+		c := testValidConfig(t, fill(properties_true))
+		properties := c.Jobs[0].Ret.(*PushJob).Send.SendProperties
+		assert.Equal(t, true, properties)
+	})
+
+	t.Run("raw_true", func(t *testing.T) {
+		c := testValidConfig(t, fill(raw_true))
+		raw := c.Jobs[0].Ret.(*PushJob).Send.Raw
+		assert.Equal(t, true, raw)
+	})
+
+	t.Run("raw_false", func(t *testing.T) {
+		c := testValidConfig(t, fill(raw_false))
+		raw := c.Jobs[0].Ret.(*PushJob).Send.Raw
+		assert.Equal(t, false, raw)
+	})
+
+	t.Run("raw_and_encrypted", func(t *testing.T) {
+		c := testValidConfig(t, fill(raw_and_encrypted))
+		raw := c.Jobs[0].Ret.(*PushJob).Send.Raw
+		encrypted := c.Jobs[0].Ret.(*PushJob).Send.Encrypted
+		assert.Equal(t, true, raw)
+		assert.Equal(t, true, encrypted)
+	})
+
 	t.Run("send_not_specified", func(t *testing.T) {
-		c, err := testConfig(t, fill(send_not_specified))
+		c := testValidConfig(t, fill(send_not_specified))
-		assert.NoError(t, err)
 		assert.NotNil(t, c)
 	})
 

config/retentiongrid.go

@@ -37,7 +37,7 @@ func (t *RetentionIntervalList) UnmarshalYAML(u func(interface{}, bool) error) (
 		return err
 	}
 
-	intervals, err := parseRetentionGridIntervalsString(in)
+	intervals, err := ParseRetentionIntervalSpec(in)
 	if err != nil {
 		return err
 	}
@@ -102,7 +102,7 @@ func parseRetentionGridIntervalString(e string) (intervals []RetentionInterval,
 
 }
 
-func parseRetentionGridIntervalsString(s string) (intervals []RetentionInterval, err error) {
+func ParseRetentionIntervalSpec(s string) (intervals []RetentionInterval, err error) {
 
 	ges := strings.Split(s, "|")
 	intervals = make([]RetentionInterval, 0, 7*len(ges))

daemon/daemon.go

@@ -3,6 +3,7 @@ package daemon
 import (
 	"context"
 	"fmt"
+	"math/rand"
 	"os"
 	"os/signal"
 	"strings"
@@ -12,6 +13,7 @@ import (
 
 	"github.com/pkg/errors"
 	"github.com/prometheus/client_golang/prometheus"
+
 	"github.com/zrepl/zrepl/daemon/logging/trace"
 	"github.com/zrepl/zrepl/endpoint"
 	"github.com/zrepl/zrepl/util/envconst"
@@ -37,6 +39,12 @@ func Run(ctx context.Context, conf *config.Config) error {
 		cancel()
 	}()
 
+	// The math/rand package is used presently for generating trace IDs, we
+	// seed it with the current time and pid so that the IDs are mostly
+	// unique.
+	rand.Seed(time.Now().UnixNano())
+	rand.Seed(int64(os.Getpid()))
+
 	outlets, err := logging.OutletsFromConfig(*conf.Global.Logging)
 	if err != nil {
 		return errors.Wrap(err, "cannot build logging from config")

daemon/hooks/hooks_test.go

@@ -10,6 +10,7 @@ import (
 	"text/template"
 
 	"github.com/stretchr/testify/require"
+
 	"github.com/zrepl/zrepl/daemon/logging/trace"
 
 	"github.com/zrepl/zrepl/config"

daemon/job/active.go

@@ -9,7 +9,9 @@ import (
 	"github.com/pkg/errors"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/common/log"
+
 	"github.com/zrepl/zrepl/daemon/logging/trace"
+	"github.com/zrepl/zrepl/util/envconst"
 
 	"github.com/zrepl/zrepl/config"
 	"github.com/zrepl/zrepl/daemon/job/reset"
@@ -32,11 +34,14 @@ type ActiveSide struct {
 	name      endpoint.JobID
 	connecter transport.Connecter
 
+	replicationDriverConfig driver.Config
+
 	prunerFactory *pruner.PrunerFactory
 
-	promRepStateSecs    *prometheus.HistogramVec // labels: state
+	promRepStateSecs      *prometheus.HistogramVec // labels: state
-	promPruneSecs       *prometheus.HistogramVec // labels: prune_side
+	promPruneSecs         *prometheus.HistogramVec // labels: prune_side
-	promBytesReplicated *prometheus.CounterVec   // labels: filesystem
+	promBytesReplicated   *prometheus.CounterVec   // labels: filesystem
+	promReplicationErrors prometheus.Gauge
 
 	tasksMtx sync.Mutex
 	tasks    activeSideTasks
@@ -157,8 +162,12 @@ func modePushFromConfig(g *config.Global, in *config.PushJob, jobID endpoint.Job
 	}
 
 	m.plannerPolicy = &logic.PlannerPolicy{
-		EncryptedSend:     logic.TriFromBool(in.Send.Encrypted),
+		EncryptedSend:             logic.TriFromBool(in.Send.Encrypted),
-		ReplicationConfig: *replicationConfig,
+		ReplicationConfig:         replicationConfig,
+		SizeEstimationConcurrency: in.Replication.Concurrency.SizeEstimates,
+	}
+	if err := m.plannerPolicy.Validate(); err != nil {
+		return nil, errors.Wrap(err, "cannot build planner policy")
 	}
 
 	if m.snapper, err = snapper.FromConfig(g, m.senderConfig.FSF, in.Snapshotting); err != nil {
@@ -252,8 +261,12 @@ func modePullFromConfig(g *config.Global, in *config.PullJob, jobID endpoint.Job
 	}
 
 	m.plannerPolicy = &logic.PlannerPolicy{
-		EncryptedSend:     logic.DontCare,
+		EncryptedSend:             logic.DontCare,
-		ReplicationConfig: *replicationConfig,
+		ReplicationConfig:         replicationConfig,
+		SizeEstimationConcurrency: in.Replication.Concurrency.SizeEstimates,
+	}
+	if err := m.plannerPolicy.Validate(); err != nil {
+		return nil, errors.Wrap(err, "cannot build planner policy")
 	}
 
 	m.receiverConfig, err = buildReceiverConfig(in, jobID)
@@ -264,6 +277,16 @@ func modePullFromConfig(g *config.Global, in *config.PullJob, jobID endpoint.Job
 	return m, nil
 }
 
+func replicationDriverConfigFromConfig(in *config.Replication) (c driver.Config, err error) {
+	c = driver.Config{
+		StepQueueConcurrency:     in.Concurrency.Steps,
+		MaxAttempts:              envconst.Int("ZREPL_REPLICATION_MAX_ATTEMPTS", 3),
+		ReconnectHardFailTimeout: envconst.Duration("ZREPL_REPLICATION_RECONNECT_HARD_FAIL_TIMEOUT", 10*time.Minute),
+	}
+	err = c.Validate()
+	return c, err
+}
+
 func activeSide(g *config.Global, in *config.ActiveJob, configJob interface{}) (j *ActiveSide, err error) {
 
 	j = &ActiveSide{}
@@ -299,6 +322,14 @@ func activeSide(g *config.Global, in *config.ActiveJob, configJob interface{}) (
 		ConstLabels: prometheus.Labels{"zrepl_job": j.name.String()},
 	}, []string{"filesystem"})
 
+	j.promReplicationErrors = prometheus.NewGauge(prometheus.GaugeOpts{
+		Namespace:   "zrepl",
+		Subsystem:   "replication",
+		Name:        "filesystem_errors",
+		Help:        "number of filesystems that failed replication in the latest replication attempt, or -1 if the job failed before enumerating the filesystems",
+		ConstLabels: prometheus.Labels{"zrepl_job": j.name.String()},
+	})
+
 	j.connecter, err = fromconfig.ConnecterFromConfig(g, in.Connect)
 	if err != nil {
 		return nil, errors.Wrap(err, "cannot build client")
@@ -316,6 +347,11 @@ func activeSide(g *config.Global, in *config.ActiveJob, configJob interface{}) (
 		return nil, err
 	}
 
+	j.replicationDriverConfig, err = replicationDriverConfigFromConfig(in.Replication)
+	if err != nil {
+		return nil, errors.Wrap(err, "cannot build replication driver config")
+	}
+
 	return j, nil
 }
 
@@ -323,6 +359,7 @@ func (j *ActiveSide) RegisterMetrics(registerer prometheus.Registerer) {
 	registerer.MustRegister(j.promRepStateSecs)
 	registerer.MustRegister(j.promPruneSecs)
 	registerer.MustRegister(j.promBytesReplicated)
+	registerer.MustRegister(j.promReplicationErrors)
 }
 
 func (j *ActiveSide) Name() string { return j.name.String() }
@@ -448,13 +485,17 @@ func (j *ActiveSide) do(ctx context.Context) {
 			*tasks = activeSideTasks{}
 			tasks.replicationCancel = func() { repCancel(); endSpan() }
 			tasks.replicationReport, repWait = replication.Do(
-				ctx, logic.NewPlanner(j.promRepStateSecs, j.promBytesReplicated, sender, receiver, j.mode.PlannerPolicy()),
+				ctx, j.replicationDriverConfig, logic.NewPlanner(j.promRepStateSecs, j.promBytesReplicated, sender, receiver, j.mode.PlannerPolicy()),
 			)
 			tasks.state = ActiveSideReplicating
 		})
 		GetLogger(ctx).Info("start replication")
 		repWait(true) // wait blocking
 		repCancel()   // always cancel to free up context resources
+
+		replicationReport := j.tasks.replicationReport()
+		j.promReplicationErrors.Set(float64(replicationReport.GetFailedFilesystemsCountInLatestAttempt()))
+
 		endSpan()
 	}
 

daemon/job/active_test.go

@@ -5,6 +5,7 @@ import (
 
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
+
 	"github.com/zrepl/zrepl/endpoint"
 	"github.com/zrepl/zrepl/transport"
 )

daemon/job/build_jobs_sendrecvoptions.go

@@ -2,9 +2,11 @@ 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/util/nodefault"
 	"github.com/zrepl/zrepl/zfs"
 )
 
@@ -19,11 +21,19 @@ func buildSenderConfig(in SendingJobConfig, jobID endpoint.JobID) (*endpoint.Sen
 	if err != nil {
 		return nil, errors.Wrap(err, "cannot build filesystem filter")
 	}
-
+	sendOpts := in.GetSendOptions()
 	return &endpoint.SenderConfig{
-		FSF:     fsf,
+		FSF:   fsf,
-		Encrypt: &zfs.NilBool{B: in.GetSendOptions().Encrypted},
+		JobID: jobID,
-		JobID:   jobID,
+
+		Encrypt:              &nodefault.Bool{B: sendOpts.Encrypted},
+		SendRaw:              sendOpts.Raw,
+		SendProperties:       sendOpts.SendProperties,
+		SendBackupProperties: sendOpts.BackupProperties,
+		SendLargeBlocks:      sendOpts.LargeBlocks,
+		SendCompressed:       sendOpts.Compressed,
+		SendEmbeddedData:     sendOpts.EmbeddedData,
+		SendSaved:            sendOpts.Saved,
 	}, nil
 }
 
@@ -42,10 +52,14 @@ func buildReceiverConfig(in ReceivingJobConfig, jobID endpoint.JobID) (rc endpoi
 		return rc, errors.New("root_fs must not be empty") // duplicates error check of receiver
 	}
 
+	recvOpts := in.GetRecvOptions()
 	rc = endpoint.ReceiverConfig{
 		JobID:                      jobID,
 		RootWithoutClientComponent: rootFs,
 		AppendClientIdentity:       in.GetAppendClientIdentity(),
+
+		InheritProperties:  recvOpts.Properties.Inherit,
+		OverrideProperties: recvOpts.Properties.Override,
 	}
 	if err := rc.Validate(); err != nil {
 		return rc, errors.Wrap(err, "cannot build receiver config")

daemon/job/build_jobs_test.go

@@ -144,3 +144,113 @@ func TestSampleConfigsAreBuiltWithoutErrors(t *testing.T) {
 	}
 
 }
+
+func TestReplicationOptions(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
+`
+
+	type Test struct {
+		name        string
+		input       string
+		expectOk    func(t *testing.T, a *ActiveSide, m *modePush)
+		expectError bool
+	}
+
+	tests := []Test{
+		{
+			name: "defaults",
+			input: `
+  replication: {}
+`,
+			expectOk: func(t *testing.T, a *ActiveSide, m *modePush) {},
+		},
+		{
+			name: "steps_zero",
+			input: `
+  replication:
+    concurrency:
+      steps: 0
+`,
+			expectError: true,
+		},
+		{
+			name: "size_estimates_zero",
+			input: `
+  replication:
+    concurrency:
+      size_estimates: 0
+`,
+			expectError: true,
+		},
+		{
+			name: "custom_values",
+			input: `
+  replication:
+    concurrency:
+      steps: 23
+      size_estimates: 42
+`,
+			expectOk: func(t *testing.T, a *ActiveSide, m *modePush) {
+				assert.Equal(t, 23, a.replicationDriverConfig.StepQueueConcurrency)
+				assert.Equal(t, 42, m.plannerPolicy.SizeEstimationConcurrency)
+			},
+		},
+		{
+			name: "negative_values_forbidden",
+			input: `
+  replication:
+    concurrency:
+      steps: -23
+      size_estimates: -42
+`,
+			expectError: true,
+		},
+	}
+
+	fill := func(s string) string { return fmt.Sprintf(tmpl, s) }
+
+	for _, ts := range tests {
+		t.Run(ts.name, func(t *testing.T) {
+			assert.True(t, (ts.expectError) != (ts.expectOk != nil))
+
+			cstr := fill(ts.input)
+			t.Logf("testing config:\n%s", cstr)
+			c, err := config.ParseConfigBytes([]byte(cstr))
+			require.NoError(t, err)
+			jobs, err := JobsFromConfig(c)
+			if ts.expectOk != nil {
+				require.NoError(t, err)
+				require.NotNil(t, c)
+				require.NoError(t, err)
+				require.Len(t, jobs, 1)
+				a := jobs[0].(*ActiveSide)
+				m := a.mode.(*modePush)
+				ts.expectOk(t, a, m)
+			} else if ts.expectError {
+				require.Error(t, err)
+			} else {
+				t.Fatalf("test must define expectOk or expectError")
+			}
+
+		})
+	}
+
+}

daemon/job/passive.go

@@ -6,6 +6,7 @@ import (
 
 	"github.com/pkg/errors"
 	"github.com/prometheus/client_golang/prometheus"
+
 	"github.com/zrepl/zrepl/daemon/logging/trace"
 
 	"github.com/zrepl/zrepl/config"

daemon/job/snapjob.go

@@ -4,10 +4,13 @@ import (
 	"context"
 	"fmt"
 	"sort"
+	"sync"
 
 	"github.com/pkg/errors"
 	"github.com/prometheus/client_golang/prometheus"
+
 	"github.com/zrepl/zrepl/daemon/logging/trace"
+	"github.com/zrepl/zrepl/util/nodefault"
 
 	"github.com/zrepl/zrepl/config"
 	"github.com/zrepl/zrepl/daemon/filters"
@@ -28,7 +31,8 @@ type SnapJob struct {
 
 	promPruneSecs *prometheus.HistogramVec // labels: prune_side
 
-	pruner *pruner.Pruner
+	prunerMtx sync.Mutex
+	pruner    *pruner.Pruner
 }
 
 func (j *SnapJob) Name() string { return j.name.String() }
@@ -76,9 +80,11 @@ type SnapJobStatus struct {
 func (j *SnapJob) Status() *Status {
 	s := &SnapJobStatus{}
 	t := j.Type()
+	j.prunerMtx.Lock()
 	if j.pruner != nil {
 		s.Pruning = j.pruner.Report()
 	}
+	j.prunerMtx.Unlock()
 	s.Snapshotting = j.snapper.Report()
 	return &Status{Type: t, JobSpecific: s}
 }
@@ -174,9 +180,11 @@ func (j *SnapJob) doPrune(ctx context.Context) {
 		JobID: j.name,
 		FSF:   j.fsfilter,
 		// FIXME encryption setting is irrelevant for SnapJob because the endpoint is only used as pruner.Target
-		Encrypt: &zfs.NilBool{B: true},
+		Encrypt: &nodefault.Bool{B: true},
 	})
+	j.prunerMtx.Lock()
 	j.pruner = j.prunerFactory.BuildLocalPruner(ctx, sender, alwaysUpToDateReplicationCursorHistory{sender})
+	j.prunerMtx.Unlock()
 	log.Info("start pruning")
 	j.pruner.Prune()
 	log.Info("finished pruning")

daemon/logging/build_logging.go

@@ -9,6 +9,7 @@ import (
 
 	"github.com/mattn/go-isatty"
 	"github.com/pkg/errors"
+
 	"github.com/zrepl/zrepl/config"
 	"github.com/zrepl/zrepl/daemon/logging/trace"
 	"github.com/zrepl/zrepl/logger"

daemon/logging/trace/trace.go

@@ -93,11 +93,15 @@ package trace
 import (
 	"context"
 	"fmt"
+	"os"
+	runtimedebug "runtime/debug"
 	"strings"
 	"time"
 
+	"github.com/kr/pretty"
 	"github.com/pkg/errors"
 	"github.com/prometheus/client_golang/prometheus"
+
 	"github.com/zrepl/zrepl/util/chainlock"
 )
 
@@ -120,15 +124,19 @@ func RegisterMetrics(r prometheus.Registerer) {
 }
 
 type traceNode struct {
-	id         string
+	// NOTE: members with prefix debug are only valid if the package variable debugEnabled is true.
-	annotation string
+
-	parentTask *traceNode
+	id                 string
+	annotation         string
+	parentTask         *traceNode
+	debugCreationStack string // debug: stack trace of when the traceNode was created
 
 	mtx chainlock.L
 
-	activeChildTasks int32 // only for task nodes, insignificant for span nodes
+	activeChildTasks      int32               // only for task nodes, insignificant for span nodes
-	parentSpan       *traceNode
+	debugActiveChildTasks map[*traceNode]bool // debug: set of active child tasks
-	activeChildSpan  *traceNode // nil if task or span doesn't have an active child span
+	parentSpan            *traceNode
+	activeChildSpan       *traceNode // nil if task or span doesn't have an active child span
 
 	startedAt time.Time
 	endedAt   time.Time
@@ -137,6 +145,14 @@ type traceNode struct {
 func (s *traceNode) StartedAt() time.Time { return s.startedAt }
 func (s *traceNode) EndedAt() time.Time   { return s.endedAt }
 
+// caller must hold mtx
+func (s *traceNode) debugString() string {
+	if !debugEnabled {
+		return "<debugEnabled=false>"
+	}
+	return pretty.Sprint(s)
+}
+
 // Returned from WithTask or WithSpan.
 // Must be called once the task or span ends.
 // See package-level docs for nesting rules.
@@ -196,8 +212,16 @@ func WithTask(ctx context.Context, taskName string) (context.Context, DoneFunc)
 		endedAt:   time.Time{},
 	}
 
+	if debugEnabled {
+		this.debugCreationStack = string(runtimedebug.Stack())
+		this.debugActiveChildTasks = map[*traceNode]bool{}
+	}
+
 	if parentTask != nil {
 		this.parentTask.activeChildTasks++
+		if debugEnabled {
+			this.parentTask.debugActiveChildTasks[this] = true
+		}
 		parentTask.mtx.Unlock()
 	}
 
@@ -218,7 +242,11 @@ func WithTask(ctx context.Context, taskName string) (context.Context, DoneFunc)
 			defer this.mtx.Lock().Unlock()
 
 			if this.activeChildTasks != 0 {
-				panic(errors.Wrapf(ErrTaskStillHasActiveChildTasks, "end task: %v active child tasks", this.activeChildTasks))
+				if debugEnabled {
+					// the debugString can be quite long and panic won't print it completely
+					fmt.Fprintf(os.Stderr, "going to panic due to activeChildTasks:\n%s\n", this.debugString())
+				}
+				panic(errors.WithMessagef(ErrTaskStillHasActiveChildTasks, "end task: %v active child tasks\n", this.activeChildTasks))
 			}
 
 			// support idempotent task ends
@@ -229,8 +257,15 @@ func WithTask(ctx context.Context, taskName string) (context.Context, DoneFunc)
 
 			if this.parentTask != nil {
 				this.parentTask.activeChildTasks--
+				if debugEnabled {
+					delete(this.parentTask.debugActiveChildTasks, this)
+				}
 				if this.parentTask.activeChildTasks < 0 {
-					panic("impl error: parent task with negative activeChildTasks count")
+					if debugEnabled {
+						// the debugString can be quite long and panic won't print it completely
+						fmt.Fprintf(os.Stderr, "going to panic due to activeChildTasks < 0:\n%s\n", this.parentTask.debugString())
+					}
+					panic(fmt.Sprintf("impl error: parent task with negative activeChildTasks count: %v", this.parentTask.activeChildTasks))
 				}
 			}
 			return false
@@ -279,6 +314,10 @@ func WithSpan(ctx context.Context, annotation string) (context.Context, DoneFunc
 		endedAt:   time.Time{},
 	}
 
+	if debugEnabled {
+		this.debugCreationStack = string(runtimedebug.Stack())
+	}
+
 	parentSpan.mtx.HoldWhile(func() {
 		if parentSpan.activeChildSpan != nil {
 			panic(ErrAlreadyActiveChildSpan)

daemon/logging/trace/trace_convenience.go

@@ -43,15 +43,19 @@ func WithTaskAndSpan(ctx context.Context, task string, span string) (context.Con
 }
 
 // create a span during which several child tasks are spawned using the `add` function
+//
+// IMPORTANT FOR USERS: Caller must ensure that the capturing behavior is correct, the Go linter doesn't catch this.
 func WithTaskGroup(ctx context.Context, taskGroup string) (_ context.Context, add func(f func(context.Context)), waitEnd DoneFunc) {
 	var wg sync.WaitGroup
 	ctx, endSpan := WithSpan(ctx, taskGroup)
 	add = func(f func(context.Context)) {
 		wg.Add(1)
-		defer wg.Done()
+		go func() {
-		ctx, endTask := WithTask(ctx, taskGroup)
+			defer wg.Done()
-		defer endTask()
+			ctx, endTask := WithTask(ctx, taskGroup)
-		f(ctx)
+			defer endTask()
+			f(ctx)
+		}()
 	}
 	waitEnd = func() {
 		wg.Wait()

daemon/logging/trace/trace_convenience_test.go

@@ -1,7 +1,10 @@
 package trace
 
 import (
+	"context"
+	"sync/atomic"
 	"testing"
+	"time"
 
 	"github.com/stretchr/testify/assert"
 )
@@ -14,3 +17,46 @@ func TestGetCallerOrPanic(t *testing.T) {
 	// zrepl prefix is stripped
 	assert.Equal(t, "daemon/logging/trace.TestGetCallerOrPanic", ret)
 }
+
+func TestWithTaskGroupRunTasksConcurrently(t *testing.T) {
+
+	// spawn a task group where each task waits for the other to start
+	// => without concurrency, they would hang
+
+	rootCtx, endRoot := WithTaskFromStack(context.Background())
+	defer endRoot()
+
+	_, add, waitEnd := WithTaskGroup(rootCtx, "test-task-group")
+
+	schedulerTimeout := 2 * time.Second
+	timeout := time.After(schedulerTimeout)
+	var hadTimeout uint32
+	started0, started1 := make(chan struct{}), make(chan struct{})
+	for i := 0; i < 2; i++ {
+		i := i // capture by copy
+		add(func(ctx context.Context) {
+			switch i {
+			case 0:
+				close(started0)
+				select {
+				case <-started1:
+				case <-timeout:
+					atomic.AddUint32(&hadTimeout, 1)
+				}
+			case 1:
+				close(started1)
+				select {
+				case <-started0:
+				case <-timeout:
+					atomic.AddUint32(&hadTimeout, 1)
+				}
+			default:
+				panic("unreachable")
+			}
+		})
+	}
+
+	waitEnd()
+	assert.Zero(t, hadTimeout, "either bad impl or scheduler timeout (which is %v)", schedulerTimeout)
+
+}

daemon/logging/trace/trace_debug.go

@@ -3,9 +3,11 @@ package trace
 import (
 	"fmt"
 	"os"
+
+	"github.com/zrepl/zrepl/util/envconst"
 )
 
-const debugEnabled = false
+var debugEnabled = envconst.Bool("ZREPL_TRACE_DEBUG_ENABLED", false)
 
 func debug(format string, args ...interface{}) {
 	if !debugEnabled {

daemon/logging/trace/trace_genID.go

@@ -3,20 +3,11 @@ package trace
 import (
 	"encoding/base64"
 	"math/rand"
-	"os"
 	"strings"
-	"time"
 
 	"github.com/zrepl/zrepl/util/envconst"
 )
 
-var genIdPRNG = rand.New(rand.NewSource(1))
-
-func init() {
-	genIdPRNG.Seed(time.Now().UnixNano())
-	genIdPRNG.Seed(int64(os.Getpid()))
-}
-
 var genIdNumBytes = envconst.Int("ZREPL_TRACE_ID_NUM_BYTES", 3)
 
 func init() {
@@ -30,7 +21,7 @@ func genID() string {
 	enc := base64.NewEncoder(base64.RawStdEncoding, &out)
 	buf := make([]byte, genIdNumBytes)
 	for i := 0; i < len(buf); {
-		n, err := genIdPRNG.Read(buf[i:])
+		n, err := rand.Read(buf[i:])
 		if err != nil {
 			panic(err)
 		}

daemon/snapper/snapper.go

@@ -8,6 +8,7 @@ import (
 	"time"
 
 	"github.com/pkg/errors"
+
 	"github.com/zrepl/zrepl/daemon/logging/trace"
 
 	"github.com/zrepl/zrepl/config"

debian

@@ -0,0 +1 @@
+packaging/deb/debian

dist/grafana/grafana-prometheus-zrepl.json

@@ -69,6 +69,139 @@
             "title": "Panel Title",
             "type": "text"
         },
+        {
+            "cacheTimeout": null,
+            "colorBackground": true,
+            "colorPostfix": false,
+            "colorPrefix": false,
+            "colorValue": false,
+            "colors": [
+                "#bf1b00",
+                "#508642",
+                "#bf1b00"
+            ],
+            "datasource": "${DS_PROMETHEUS}",
+            "description": "Number of filesystems that failed replications",
+            "format": "none",
+            "gauge": {
+                "maxValue": 100,
+                "minValue": 0,
+                "show": false,
+                "thresholdLabels": false,
+                "thresholdMarkers": true
+            },
+            "gridPos": {
+                "h": 3,
+                "w": 24,
+                "x": 0,
+                "y": 10
+            },
+            "id": 50,
+            "interval": null,
+            "links": [],
+            "mappingType": 1,
+            "mappingTypes": [
+                {
+                    "name": "value to text",
+                    "value": 1
+                },
+                {
+                    "name": "range to text",
+                    "value": 2
+                }
+            ],
+            "maxDataPoints": 100,
+            "nullPointMode": "connected",
+            "nullText": null,
+            "postfix": "",
+            "postfixFontSize": "50%",
+            "prefix": "",
+            "prefixFontSize": "50%",
+            "rangeMaps": [
+                {
+                    "from": "",
+                    "text": "",
+                    "to": ""
+                }
+            ],
+            "repeat": "zrepl_job_name",
+            "repeatDirection": "h",
+            "scopedVars": {
+                "zrepl_job_name": {
+                    "selected": false,
+                    "text": "desktop_to_homesrv",
+                    "value": "desktop_to_homesrv"
+                }
+            },
+            "sparkline": {
+                "fillColor": "rgba(31, 118, 189, 0.18)",
+                "full": true,
+                "lineColor": "rgb(31, 120, 193)",
+                "show": true
+            },
+            "tableColumn": "__name__",
+            "targets": [
+                {
+                    "expr": "zrepl_replication_filesystem_errors{job=\"$prom_job_name\",zrepl_job=\"$zrepl_job_name\"}",
+                    "format": "time_series",
+                    "groupBy": [
+                        {
+                            "params": [
+                                "$__interval"
+                            ],
+                            "type": "time"
+                        },
+                        {
+                            "params": [
+                                "null"
+                            ],
+                            "type": "fill"
+                        }
+                    ],
+                    "instant": true,
+                    "interval": "",
+                    "intervalFactor": 1,
+                    "legendFormat": "",
+                    "orderByTime": "ASC",
+                    "policy": "default",
+                    "refId": "A",
+                    "resultFormat": "time_series",
+                    "select": [
+                        [
+                            {
+                                "params": [
+                                    "value"
+                                ],
+                                "type": "field"
+                            },
+                            {
+                                "params": [],
+                                "type": "mean"
+                            }
+                        ]
+                    ],
+                    "tags": []
+                }
+            ],
+            "thresholds": "0,1",
+            "title": "Failed replications $zrepl_job_name",
+            "transparent": false,
+            "type": "singlestat",
+            "valueFontSize": "80%",
+            "valueMaps": [
+                {
+                    "op": "=",
+                    "text": "All failed",
+                    "value": "-1"
+                },
+                {
+                    "op": "=",
+                    "text": "All OK",
+                    "value": "0"
+                }
+            ],
+            "valueName": "avg"
+        },
         {
             "aliasColors": {},
             "bars": false,
@@ -87,7 +220,7 @@
                 "h": 4,
                 "w": 12,
                 "x": 0,
-                "y": 10
+                "y": 13
             },
             "hiddenSeries": false,
             "id": 48,
@@ -181,7 +314,7 @@
                 "h": 5,
                 "w": 12,
                 "x": 12,
-                "y": 10
+                "y": 13
             },
             "hiddenSeries": false,
             "id": 44,
@@ -273,7 +406,7 @@
                 "h": 5,
                 "w": 12,
                 "x": 0,
-                "y": 14
+                "y": 17
             },
             "hiddenSeries": false,
             "id": 42,
@@ -373,7 +506,7 @@
                 "h": 4,
                 "w": 12,
                 "x": 12,
-                "y": 15
+                "y": 18
             },
             "hiddenSeries": false,
             "id": 22,
@@ -465,7 +598,7 @@
                 "h": 5,
                 "w": 12,
                 "x": 0,
-                "y": 19
+                "y": 22
             },
             "hiddenSeries": false,
             "id": 33,
@@ -573,7 +706,7 @@
                 "h": 5,
                 "w": 12,
                 "x": 12,
-                "y": 19
+                "y": 22
             },
             "hiddenSeries": false,
             "id": 23,
@@ -665,7 +798,7 @@
                 "h": 5,
                 "w": 12,
                 "x": 0,
-                "y": 24
+                "y": 27
             },
             "hiddenSeries": false,
             "id": 41,
@@ -758,7 +891,7 @@
                 "h": 5,
                 "w": 12,
                 "x": 12,
-                "y": 24
+                "y": 27
             },
             "hiddenSeries": false,
             "id": 47,
@@ -787,7 +920,7 @@
             "stack": false,
             "steppedLine": false,
             "targets": [{
-                "expr": "zrepl_endpoint_send_abstractions_cache_entry_count",
+                "expr": "zrepl_endpoint_abstractions_cache_entry_count",
                 "format": "time_series",
                 "intervalFactor": 1,
                 "refId": "A"
@@ -796,7 +929,7 @@
             "timeFrom": null,
             "timeRegions": [],
             "timeShift": null,
-            "title": "send abstractions cache entry count (should not be zero and not grow unboundedly)",
+            "title": "zfs abstractions cache entry count (should not be zero and not grow unboundedly)",
             "tooltip": {
                 "shared": true,
                 "sort": 0,
@@ -850,7 +983,7 @@
                 "h": 5,
                 "w": 12,
                 "x": 0,
-                "y": 29
+                "y": 32
             },
             "hiddenSeries": false,
             "id": 17,
@@ -943,7 +1076,7 @@
                 "h": 5,
                 "w": 12,
                 "x": 0,
-                "y": 34
+                "y": 37
             },
             "hiddenSeries": false,
             "id": 19,
@@ -1044,6 +1177,33 @@
             "tagsQuery": "",
             "type": "query",
             "useTags": false
+        },
+        {
+            "allValue": null,
+            "current": {
+                "text": "All",
+                "value": [
+                    "$__all"
+                ]
+            },
+            "datasource": "${DS_PROMETHEUS}",
+            "definition": "label_values(zrepl_replication_filesystem_errors{job=\"$prom_job_name\"}, zrepl_job)",
+            "hide": 2,
+            "includeAll": true,
+            "label": "Zrepl Job Name",
+            "multi": true,
+            "name": "zrepl_job_name",
+            "options": [],
+            "query": "label_values(zrepl_replication_filesystem_errors{job=\"$prom_job_name\"}, zrepl_job)",
+            "refresh": 1,
+            "regex": "",
+            "skipUrlSync": false,
+            "sort": 1,
+            "tagValuesQuery": "",
+            "tags": [],
+            "tagsQuery": "",
+            "type": "query",
+            "useTags": false
         }]
     },
     "time": {
@@ -1076,6 +1236,6 @@
     },
     "timezone": "",
     "title": "zrepl 0.3",
-    "uid": "etJuvBmGz",
+    "uid": "etQuvBnGz",
-    "version": 6
+    "version": 7
-}
+}

docs/changelog.rst

@@ -27,6 +27,33 @@ We use the following annotations for classifying changes:
 * |bugfix| Change that fixes a bug, no regressions or incompatibilities expected.
 * |docs| Change to the documentation.
 
+0.3.1
+-----
+
+Mostly a bugfix release for :ref:`zrepl 0.3 <release-0.3>`.
+
+* |feature| pruning: add optional ``regex`` field to ``last_n`` rule
+* |docs| pruning: ``grid`` : improve documentation and add an example
+* |bugfix| pruning: ``grid``:  add all snapshots that do not match the regex to the rule's destroy list.
+  This brings the implementation in line with the docs.
+* |bugfix| ``easyrsa`` script in docs
+* |bugfix| platformtest: fix skipping encryption-only tests on systems that don't support encryption
+* |bugfix| replication: report AttemptDone if no filesystems are replicated
+* |feature| status + replication: warning if replication succeeeded without any filesystem being replicated
+* |docs| update multi-job & multi-host setup section
+* RPM Packaging
+* 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
 ---
 
@@ -44,6 +71,13 @@ This is a big one! Headlining features:
 
    We highly recommend studying the updated :ref:`overview section of the configuration chapter <overview-how-replication-works>` to understand how replication works.
 
+.. TIP::
+
+   Go 1.15 changed the default TLS validation policy to **require Subject Alternative Names (SAN) in certificates**.
+   The openssl commands we provided in the quick-start guides up to and including the zrepl 0.3 docs seem not to work properly.
+   If you encounter certificate validation errors regarding SAN and wish to continue to use your old certificates, start the zrepl daemon with env var ``GODEBUG=x509ignoreCN=0``.
+   Alternatively, generate new certificates with SANs (see :ref:`both options int the TLS transport docs <transport-tcp+tlsclientauth-certgen>` ).
+
 Quick-start guides:
 
 * We have added :ref:`another quick-start guide for a typical workstation use case for zrepl <quickstart-backup-to-external-disk>`.
@@ -51,6 +85,7 @@ Quick-start guides:
 
 Additional changelog:
 
+* |break| Go 1.15 TLS changes mentioned above.
 * |break| |break_config| **more restrictive job names than in prior zrepl versions**
   Starting with this version, job names are going to be embedded into ZFS holds and bookmark names (see :ref:`this section for details <zrepl-zfs-abstractions>`).
   Therefore you might need to adjust your job names.
@@ -65,6 +100,7 @@ Additional changelog:
     The migration will ensure that only those old-format cursors are destroyed that have been superseeded by new-format cursors.
 
 * |feature| New option ``listen_freebind`` (tcp, tls, prometheus listener)
+* |feature| :issue:`341` Prometheus metric for failing replications + corresponding Grafana panel
 * |feature| :issue:`265` transport/tcp: support for CIDR masks in client IP whitelist
 * |feature| documented subcommand to generate ``bash`` and ``zsh`` completions
 * |feature| :issue:`307` ``chrome://trace`` -compatible activity tracing of zrepl daemon activity
@@ -80,13 +116,6 @@ Additional changelog:
 * **[MAINTAINER NOTICE]** New platform tests in this version, please make sure you run them for your distro!
 * **[MAINTAINER NOTICE]** Please add the shell completions to the zrepl packages.
 
-.. 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>`_.
-
 0.2.1
 -----
 

docs/configuration/overview.rst

@@ -59,8 +59,8 @@ Note that snapshot-creation denoted by "(snap)" is orthogonal to whether a job i
 | Pull mode             | ``pull``     | ``source``                       | * Central backup-server for many nodes                                             |
 |                       |              | (snap)                           | * Remote server to NAS behind NAT                                                  |
 +-----------------------+--------------+----------------------------------+------------------------------------------------------------------------------------+
-| Local replication     | | ``push`` + ``sink`` in one config             | * Backup FreeBSD boot pool                                                         |
+| Local replication     | | ``push`` + ``sink`` in one config             | * Backup to :ref:`locally attached disk <quickstart-backup-to-external-disk>`      |
-|                       | | with :ref:`local transport <transport-local>` |                                                                                    |
+|                       | | with :ref:`local transport <transport-local>` | * Backup FreeBSD boot pool                                                         |
 +-----------------------+--------------+----------------------------------+------------------------------------------------------------------------------------+
 | Snap & prune-only     | ``snap``     | N/A                              | * | Snapshots & pruning but no replication                                         |
 |                       | (snap)       |                                  |   | required                                                                       |
@@ -80,16 +80,19 @@ The active side (:ref:`push <job-push>` and :ref:`pull <job-pull>` job) executes
 .. TIP::
   The progress of the active side can be watched live using the ``zrepl status`` subcommand.
 
+.. _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.
-Each transport listener provides a client's identity to the passive side job.
+When a client connects, the transport listener performS listener-specific access control (cert validation, IP ACLs, etc)
-It uses the client identity for access control:
+and determines the *client identity*.
+The passive side job then 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`` job has a whitelist of client identities that are allowed pull access.
+* 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.
 
 .. TIP::
    The implementation of the ``sink`` job requires that the connecting client identities be a valid ZFS filesystem name components.
@@ -145,6 +148,22 @@ 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.
@@ -164,7 +183,7 @@ With the background knowledge from the previous paragraph, we now summarize the
 
 .. _replication-placeholder-property:
 
-**Placeholder filesystems** on the receiving side are regular ZFS filesystems with the placeholder property ``zrepl:placeholder=on``.
+**Placeholder filesystems** on the receiving side are regular ZFS filesystems with the ZFS property ``zrepl:placeholder=on``.
 Placeholders allow the receiving side to mirror the sender's ZFS dataset hierarchy without replicating every filesystem at every intermediary dataset path component.
 Consider the following example: ``S/H/J`` shall be replicated to ``R/sink/job/S/H/J``, but neither ``S/H`` nor ``S`` shall be replicated.
 ZFS requires the existence of ``R/sink/job/S`` and ``R/sink/job/S/H`` in order to receive into ``R/sink/job/S/H/J``.
@@ -185,7 +204,7 @@ Encoding the job name in the names ensures that multiple sending jobs can replic
 
 .. _tentative-replication-cursor-bookmarks:
 
-**Tentative replication cursor bookmarks** are short-lived boomkarks that protect the atomic moving-forward of the replication cursor and last-received-hold (see :issue:`this issue <340>`).
+**Tentative replication cursor bookmarks** are short-lived bookmarks that protect the atomic moving-forward of the replication cursor and last-received-hold (see :issue:`this issue <340>`).
 They are only necessary if step holds are not used as per the :ref:`replication.protection <replication-option-protection>` setting.
 The tentative replication cursor has the format ``#zrepl_CUSORTENTATIVE_G_<GUID>_J_<JOBNAME>``.
 The ``zrepl zfs-abstraction list`` command provides a listing of all bookmarks and holds managed by zrepl.
@@ -229,39 +248,53 @@ Limitations
 Multiple Jobs & More than 2 Machines
 ------------------------------------
 
+The quick-start guides focus on simple setups with a single sender and a single receiver.
+This section documents considerations for more complex setups.
+
 .. ATTENTION::
 
-  When using multiple jobs across single or multiple machines, the following rules are critical to avoid race conditions & data loss:
+   Before you continue, make sure you have a working understanding of :ref:`how zrepl works <overview-how-replication-works>`
+   and :ref:`what zrepl does to ensure <zrepl-zfs-abstractions>` that replication between sender and receiver is always
+   possible without conflicts.
+   This will help you understand why certain kinds of multi-machine setups do not (yet) work.
 
-  1. The sets of ZFS filesystems matched by the ``filesystems`` filter fields must be disjoint across all jobs configured on a machine.
+.. NOTE::
-  2. The ZFS filesystem subtrees of jobs with ``root_fs`` must be disjoint.
-  3. Across all zrepl instances on all machines in the replication domain, there must be a 1:1 correspondence between active and passive jobs.
 
-  Explanations & exceptions to above rules are detailed below.
+   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>`_.
 
-If you 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
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+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.
 
-No Overlapping
+On your setup, ensure that
-^^^^^^^^^^^^^^
 
-Jobs run independently of each other.
+* all ``filesystems`` filter specifications are disjoint
-If two jobs match the same filesystem with their ``filesystems`` filter, they will operate on that filesystem independently and potentially in parallel.
+* no ``root_fs`` is a prefix or equal to another ``root_fs``
-For example, if job A prunes snapshots that job B is planning to replicate, the replication will fail because B assumed the snapshot to still be present.
+* no ``filesystems`` filter matches any ``root_fs``
-However, the next replication attempt will re-examine the situation from scratch and should work.
 
-N push jobs to 1 sink
+**Exceptions to the rule**:
-^^^^^^^^^^^^^^^^^^^^^
 
-The :ref:`sink job <job-sink>` namespaces by client identity.
+* A ``snap`` and ``push`` job on the same machine can match the same ``filesystems``.
-It is thus safe to push to one sink job with different client identities.
+  To avoid interference, only one of the jobs should be pruning snapshots on the sender, the other one should keep all snapshots.
-If the push jobs have the same client identity, the filesystems matched by the push jobs must be disjoint to avoid races.
+  Since the jobs won't coordinate, errors in the log are to be expected, but :ref:`zrepl's ZFS abstractions <zrepl-zfs-abstractions>` ensure that ``push`` and ``sink`` can always replicate incrementally.
+  This scenario is detailed in one of the :ref:`quick-start guides <quickstart-backup-to-external-disk>`.
 
-N pull jobs from 1 source
-^^^^^^^^^^^^^^^^^^^^^^^^^
 
-Multiple pull jobs pulling from the same source have potential for race conditions during pruning:
+More Than 2 Machines
-each pull job prunes the source side independently, causing replication-prune and prune-prune races.
+^^^^^^^^^^^^^^^^^^^^
 
-There is currently no way for a pull job to filter which snapshots it should attempt to replicate.
+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).
-Thus, it is not possible to just manually assert that the prune rules of all pull jobs are disjoint to avoid replication-prune and prune-prune races.
+
+**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>`)
+
+  * ``sink`` constrains each client to a disjoint sub-tree of the sink-side dataset hierarchy ``${root_fs}/${client_identity}``.
+    Therefore, the different clients cannot interfere.
+
+
+**Setups that do not work**:
+
+* N ``pull`` identities, 1 ``source`` job. Tracking :issue:`380`.
 

docs/configuration/prune.rst

@@ -84,34 +84,82 @@ Policy ``grid``
         - type: grid
           regex: "^zrepl_.*"
           grid: 1x1h(keep=all) | 24x1h | 35x1d | 6x30d
-                │                │
+                │                │               │
-                └─ one hour interval
+                └─ 1 repetition of a one-hour interval with keep=all
-                                 │
+                                 │               │
-                                 └─ 24 adjacent one-hour intervals
+                                 └─ 24 repetitions of a one-hour interval with keep=1
+                                                 │
+                                                 └─ 6 repetitions of a 30-day interval with keep=1
       ...
 
-The retention grid can be thought of as a time-based sieve:
+The retention grid can be thought of as a time-based sieve that thins out snapshots as they get older.
-The ``grid`` field specifies a list of adjacent time intervals:
-the left edge of the leftmost (first) interval is the ``creation`` date of the youngest snapshot.
-All intervals to its right describe time intervals further in the past.
-
-Each interval carries a maximum number of snapshots to keep.
-It is specified via ``(keep=N)``, where ``N`` is either ``all`` (all snapshots are kept) or a positive integer.
-The default value is **keep=1**.
 
+The ``grid`` field specifies a list of adjacent time intervals.
+Each interval is a bucket with a maximum capacity of ``keep`` snapshots.
 The following procedure happens during pruning:
 
 #. The list of snapshots is filtered by the regular expression in ``regex``.
-   Only snapshots names that match the regex are considered for this rule, all others are not affected.
+   Only snapshots names that match the regex are considered for this rule, all others will be pruned unless another rule keeps them.
-#. The filtered list of snapshots is sorted by ``creation``
+#. The snapshots that match ``regex`` are placed onto a time axis according to their ``creation`` date.
-#. The left edge of the first interval is aligned to the ``creation`` date of the youngest snapshot
+   The youngest snapshot is on the left, the oldest on the right.
-#. A list of buckets is created, one for each interval
+#. The first buckets are placed "under" that axis so that the ``grid`` spec's first bucket's left edge aligns with youngest snapshot.
-#. The list of snapshots is split up into the buckets.
+#. All subsequent buckets are placed adjacent to their predecessor bucket.
-#. For each 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.
+#. For each bucket, we only keep the ``keep`` oldest snapshots.
 
-   #. the contained snapshot list is sorted by creation.
+The syntax to describe the bucket list is as follows:
-   #. snapshots from the list, oldest first, are destroyed until the specified ``keep`` count is reached.
+
-   #. all remaining snapshots on the list are kept.
+::
+
+     Repeat x Duration (keep=all)
+
+* The **duration** specifies the length of the interval.
+* The **keep** count specifies the number of snapshots that fit into the bucket.
+  It can be either a positive integer or ``all`` (all snapshots are kept).
+* The **repeat** count repeats the bucket definition for the specified number of times.
+
+**Example**:
+
+::
+
+          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: .*`.
+
+          `
+           grid: 1x1h(keep=all) | 2x2h | 1x3h
+           regex: .*
+          `
+
+          0h        1h        2h        3h        4h        5h        6h        7h        8h        9h
+          |         |         |         |         |         |         |         |         |         |
+          |-Bucket1-|-----Bucket 2------|------Bucket 3-----|-----------Bucket 4----------|
+          | keep=all|      keep=1       |       keep=1      |            keep=1           |
+
+
+
+          Let us consider the following set of snapshots @a-zA-C:
+
+
+          |  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:
+
+          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
+
+          It then applies the per-bucket pruning logic described above which resulting in the
+          following list of remaining snapshots.
+
+          |  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.
 
 
 .. _prune-keep-last-n:
@@ -127,9 +175,11 @@ Policy ``last_n``
          keep_receiver:
          - type: last_n
            count: 10
+           regex: ^zrepl_.*$ # optional
      ...
 
-``last_n`` keeps the last ``count`` snapshots (last = youngest = most recent creation date).
+``last_n`` filters the snapshot list by ``regex``, then keeps the last ``count`` snapshots in that list (last = youngest = most recent creation date)
+All snapshots that don't match ``regex`` or exceed ``count`` in the filtered list are destroyed unless matched by other rules.
 
 .. _prune-keep-regex:
 

docs/configuration/replication.rst

@@ -14,6 +14,10 @@ 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 +49,26 @@ 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 +9,62 @@ 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.
+    * - ``send.``
-More specifically, if ``encryption=true``, zrepl
+      - ``zfs send``
+      - Comment
+    * - ``encrypted``
+      -
+      - Specific to zrepl, :ref:`see below <job-send-options-encrypted>`.
+    * - ``raw``
+      - ``-w``
+      - Use ``encrypted`` to only allow encrypted sends.
+    * - ``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``
+      -
+    * - ``embbeded_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 +72,137 @@ 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:
+
+``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.
+: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.
+
+::
+
+   jobs:
+   - type: pull
+     recv:
+       properties:
+         inherit:
+           - "mountpoint"
+         override: {
+           "org.openzfs.systemd:ignore": "on"
+         }
+     ...
+
+.. _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.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``
+
+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``

docs/configuration/snapshotting.rst

@@ -131,7 +131,7 @@ The following environment variables are set:
 * ``ZREPL_SNAPNAME``: the zrepl-generated snapshot name (e.g. ``zrepl_20380119_031407_000``)
 * ``ZREPL_DRYRUN``: set to ``"true"`` if a dry run is in progress so scripts can print, but not run, their commands
 
-An empty template hook can be found in :sampleconf:`hooks/template.sh`.
+An empty template hook can be found in :sampleconf:`/hooks/template.sh`.
 
 .. _job-hook-type-postgres-checkpoint:
 

docs/configuration/transports.rst

@@ -91,7 +91,8 @@ The ``tls`` transport uses TCP + TLS with client authentication using client cer
 The client identity is the common name (CN) presented in the client certificate.
 
 It is recommended to set up a dedicated CA infrastructure for this transport, e.g. using OpenVPN's `EasyRSA <https://github.com/OpenVPN/easy-rsa>`_.
-For a simple 2-machine setup, see the :ref:`instructions below<transport-tcp+tlsclientauth-2machineopenssl>`.
+For a simple 2-machine setup, mutual TLS might also be sufficient.
+We provide :ref:`copy-pastable instructions to generate the certificates below <transport-tcp+tlsclientauth-certgen>`.
 
 The implementation uses `Go's TLS library <https://golang.org/pkg/crypto/tls/>`_.
 Since Go binaries are statically linked, you or your distribution need to recompile zrepl when vulnerabilities in that library are disclosed.
@@ -103,6 +104,16 @@ If intermediate CAs are used, the **full chain** must be present in either in th
 Regardless, the client's certificate must be first in the ``cert`` file, with each following certificate directly certifying the one preceding it (see `TLS's specification <https://tools.ietf.org/html/rfc5246#section-7.4.2>`_).
 This is the common default when using a CA management tool.
 
+.. NOTE::
+
+   As of Go 1.15 (zrepl 0.3.0 and newer), the Go TLS / x509 library **requrires Subject Alternative Names**
+   be present in certificates. You might need to re-generate your certificates using one of the :ref:`two alternatives
+   provided below<transport-tcp+tlsclientauth-certgen>`.
+
+   Note further that zrepl continues to use the CommonName field to assign client identities.
+   Hence, we recommend to keep the Subject Alternative Name and the CommonName in sync.
+
+
 Serve
 ~~~~~
 
@@ -147,45 +158,25 @@ The ``server_cn`` specifies the expected common name (CN) of the server's certif
 It overrides the hostname specified in ``address``.
 The connection fails if either do not match.
 
+.. _transport-tcp+tlsclientauth-certgen:
+
 .. _transport-tcp+tlsclientauth-2machineopenssl:
 
-Self-Signed Certificates
+Mutual-TLS between Two Machines
-~~~~~~~~~~~~~~~~~~~~~~~~
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-Tools like `EasyRSA <https://github.com/OpenVPN/easy-rsa>`_ make it easy to manage CA infrastructure for multiple clients, e.g. a central zrepl backup server (in sink mode).
 However, 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:
 
 .. code-block:: bash
-   :emphasize-lines: 1-5,24
 
-   openssl req -x509 -sha256 -nodes \
+   (name=HOSTNAME; openssl req -x509 -sha256 -nodes \
-      -newkey rsa:4096 \
+    -newkey rsa:4096 \
-      -days 365 \
+    -days 365 \
-      -keyout HOSTNAME.key \
+    -keyout $name.key \
-      -out HOSTNAME.crt
+    -out $name.crt -addext "subjectAltName = DNS:$name" -subj "/CN=$name")
-
-   #Generating a 4096 bit RSA private key
-   #................++++
-   #.++++
-   #writing new private key to 'backups.key'
-   #-----
-   #You are about to be asked to enter information that will be incorporated
-   #into your certificate request.
-   #What you are about to enter is what is called a Distinguished Name or a DN.
-   #There are quite a few fields but you can leave some blank
-   #For some fields there will be a default value,
-   #If you enter '.', the field will be left blank.
-   #-----
-   #Country Name (2 letter code) [XX]:
-   #State or Province Name (full name) []:
-   #Locality Name (eg, city) [Default City]:
-   #Organization Name (eg, company) [Default Company Ltd]:
-   #Organizational Unit Name (eg, section) []:
-   #Common Name (eg, your name or your server's hostname) []:HOSTNAME
-   #Email Address []:
 
 Now copy each machine's ``HOSTNAME.crt`` to the other machine's ``/etc/zrepl/HOSTNAME.crt``, for example using `scp`.
 The serve & connect configuration will thus look like the following:
@@ -216,6 +207,36 @@ The serve & connect configuration will thus look like the following:
      ...
 
 
+Certificate Authority using EasyRSA
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+For more than two machines, it might make sense to set up a CA infrastructure.
+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)
+
+     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
+
+     for host in "${HOSTS[@]}"; do
+         ./easyrsa 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
+     echo ca cert available at pki/ca.crt
+
+
 .. _transport-ssh+stdinserver:
 
 ``ssh+stdinserver`` Transport

docs/gen-sphinx-versioning-flags.py

@@ -58,13 +58,11 @@ for latest_patch in latest_by_major_minor:
     cmdline.append("--whitelist-tags")
     cmdline.append(f"^{re.escape(latest_patch.orig)}$")
 
-# we want to render the latest non-rc version as the default page
+# we want flexibility to update docs for the latest stable release
-# (latest_by_major_minor is already sorted)
+# => we have a branch for that, called `stable` which we move manually
-default_version = latest_by_major_minor[-1]
+# TODO: in the future, have f"stable-{latest_by_major_minor[-1]}"
-for tag in reversed(latest_by_major_minor):
+default_version = "stable"
-    if tag.rc == 0:
+cmdline.extend(["--whitelist-branches", default_version])
-        default_version = tag
-        break
 
 cmdline.extend(["--root-ref", f"{default_version}"])
 cmdline.extend(["--banner-main-ref", f"{default_version}"])
@@ -73,4 +71,4 @@ cmdline.extend(["--sort", "semver"])
 
 cmdline.extend(["--whitelist-branches", "master"])
 
-print(" ".join(cmdline))
+print(" ".join(cmdline))

docs/global.rst.inc

@@ -13,7 +13,7 @@
    :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/endpoint.svg?url=https%3A%2F%2Fshieldsio-patreon.herokuapp.com%2Fzrepl%2Fpledges&style=flat&color=yellow
+.. |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
    :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

docs/index.rst

@@ -61,7 +61,11 @@ 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
 
 * **Automatic snapshot management**
 

docs/installation.rst

@@ -14,6 +14,7 @@ Installation
     installation/user-privileges
     installation/packages
     installation/apt-repos
+    installation/rpm-repos
     installation/compile-from-source
     installation/freebsd-jail-with-iocage
     installation/what-next

docs/installation/apt-repos.rst

@@ -7,7 +7,7 @@ Debian / Ubuntu APT repositories
 We maintain APT repositories for Debian, Ubuntu and derivatives.
 The fingerprint of the signing key is ``E101 418F D3D6 FBCB 9D65  A62D 7086 99FC 5F2E BF16``.
 It is available at `<https://zrepl.cschwarz.com/apt/apt-key.asc>`_ .
-Please open an issue `in the packaging repository <https://github.com/zrepl/debian-binary-packaging>`_ if you encounter any issues with the repository.
+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:
 
@@ -24,6 +24,6 @@ The following snippet configure the repository for your Debian or Ubuntu release
 
 .. NOTE::
 
-   Until zrepl reaches 1.0, all APT repositories will be updated to the latest zrepl release immediately.
+   Until zrepl reaches 1.0, the repositories will be updated to the latest zrepl release immediately.
    This includes breaking changes between zrepl versions.
    Use ``apt-mark hold zrepl`` to prevent upgrades of zrepl.

docs/installation/compile-from-source.rst

@@ -9,37 +9,35 @@ Producing a release requires **Go 1.11** or newer and **Python 3** + **pip3** +
 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:
 
 ::
 
-    git clone https://github.com/zrepl/zrepl.git && \
+    cd to/your/zrepl/checkout
-    cd zrepl && \
+    # make sure your user has access to the docker socket
-    sudo docker build -t zrepl_build -f build.Dockerfile . && \
+    make release-docker
-    sudo docker run -it --rm \
+    # if you want .deb or .rpm packages, invoke the follwoing
-        -v "${PWD}:/src" \
+    # targets _after_ you invoked release-docker
-        --user "$(id -u):$(id -g)" \
+    make deb-docker
-        zrepl_build make release
+    make rpm-docker
+    # build artifacts are available in ./artifacts/release
+    # packages are available in ./artifacts
 
-Alternatively, you can install build dependencies on your local system and then build in your ``$GOPATH``:
-
-::
-
-    mkdir -p "${GOPATH}/src/github.com/zrepl/zrepl"
-    git clone https://github.com/zrepl/zrepl.git "${GOPATH}/src/github.com/zrepl/zrepl"
-    cd "${GOPATH}/src/github.com/zrepl/zrepl"
-    python3 -m venv3
-    source venv3/bin/activate
-    ./lazy.sh devsetup
-    make 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.
-Either way, all build results are located in the ``artifacts/`` directory.
 
 .. NOTE::
 
-    It is your job to install the appropriate binary in the zrepl users's ``$PATH``, e.g. ``/usr/local/bin/zrepl``.
+    It is your job to install the built binary in the zrepl users's ``$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/packages.rst

@@ -30,15 +30,12 @@ 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
+    * - Fedora, CentOS, RHEL, OpenSUSE
       - ``dnf install zrepl``
-      - Available on `COPR <https://copr.fedorainfracloud.org/coprs/poettlerric/zrepl/>`_
+      - :ref:`RPM repository config <installation-rpm-repos>`
-    * - CentOS/RHEL
-      - ``yum install zrepl``
-      - Available on `COPR <https://copr.fedorainfracloud.org/coprs/poettlerric/zrepl/>`_
     * - Debian + Ubuntu
       - ``apt install zrepl``
-      - APT repository config :ref:`see below <installation-apt-repos>`
+      - :ref:`APT repository config <installation-apt-repos>`
     * - OmniOS
       - ``pkg install zrepl``
       - Available since `r151030 <https://pkg.omniosce.org/r151030/extra/en/search.shtml?token=zrepl&action=Search>`_

docs/installation/rpm-repos.rst

@@ -0,0 +1,30 @@
+.. _installation-rpm-repos:
+
+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
+
+.. 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.

docs/publish.sh

@@ -1,14 +1,30 @@
 #!/bin/bash
 set -eo pipefail
 
+
+NON_INTERACTIVE=false
+DO_CLONE=false
+while getopts "ca" arg; do
+    case "$arg" in
+        "a")
+            NON_INTERACTIVE=true
+            ;;
+        "c")
+            DO_CLONE=true
+            ;;
+        *)
+            echo invalid option
+            exit 1
+            ;;
+    esac
+done
+
 GHPAGESREPO="git@github.com:zrepl/zrepl.github.io.git"
 SCRIPTDIR=$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )
 PUBLICDIR="${SCRIPTDIR}/public_git"
 
 checkout_repo_msg() {
     echo "clone ${GHPAGESREPO} to ${PUBLICDIR}:"
-    echo "	git clone ${GHPAGESREPO} ${PUBLICDIR}"
-    git clone "${GHPAGESREPO}" "${PUBLICDIR}"
 }
 
 exit_msg() {
@@ -25,11 +41,19 @@ cd "$SCRIPTDIR"
 
 if [ ! -d "$PUBLICDIR" ]; then
     checkout_repo_msg
-    exit 1
+    if $DO_CLONE; then
+        git clone "${GHPAGESREPO}" "${PUBLICDIR}"
+    else
+        exit 1
+    fi
 fi
 
-echo -n "PRESS ENTER to confirm you commited and pushed docs changes and tags to the zrepl repo"
+if $NON_INTERACTIVE; then
-read
+    echo "non-interactive mode"
+else
+    echo -n "PRESS ENTER to confirm you commited and pushed docs changes and tags to the zrepl repo"
+    read -r
+fi
 
 pushd "$PUBLICDIR" 
 
@@ -52,9 +76,10 @@ popd
 
 echo "building site"
 
+flags="$(python3 gen-sphinx-versioning-flags.py)"
 set -e
 sphinx-versioning build \
-   $(python3 gen-sphinx-versioning-flags.py) \
+   $flags \
    docs ./public_git \
    -- -c sphinxconf # older conf.py throw errors because they used
                     # version = subprocess.show_output(["git", "describe"])
@@ -66,7 +91,7 @@ git status --porcelain
 if [[ "$(git status --porcelain)" != "" ]]; then
     CURRENT_COMMIT="${CURRENT_COMMIT}(dirty)" 
 fi
-COMMIT_MSG="sphinx-versioning render from publish.sh - `date -u` - ${CURRENT_COMMIT}"
+COMMIT_MSG="sphinx-versioning render from publish.sh - $(date -u) - ${CURRENT_COMMIT}"
 
 pushd "$PUBLICDIR"
 

docs/quickstart/continuous_server_backup.rst

@@ -51,21 +51,18 @@ To get things going quickly, we skip setting up a CA and generate two self-signe
 For convenience, we generate the key pairs on our local machine and distribute them using ssh:
 
 .. code-block:: bash
-   :emphasize-lines: 6,13
 
-   openssl req -x509 -sha256 -nodes \
+   (name=backups; openssl req -x509 -sha256 -nodes \
-      -newkey rsa:4096 \
+    -newkey rsa:4096 \
-      -days 365 \
+    -days 365 \
-      -keyout backups.key \
+    -keyout $name.key \
-      -out backups.crt
+    -out $name.crt -addext "subjectAltName = DNS:$name" -subj "/CN=$name")
-   # ... and use "backups" as Common Name (CN)
 
-   openssl req -x509 -sha256 -nodes \
+   (name=prod; openssl req -x509 -sha256 -nodes \
-      -newkey rsa:4096 \
+    -newkey rsa:4096 \
-      -days 365 \
+    -days 365 \
-      -keyout prod.key \
+    -keyout $name.key \
-      -out prod.crt
+    -out $name.crt -addext "subjectAltName = DNS:$name" -subj "/CN=$name")
-   # ... and use "prod" as Common Name (CN)
 
    ssh root@backups "mkdir /etc/zrepl"
    scp  backups.key backups.crt prod.crt root@backups:/etc/zrepl
@@ -94,4 +91,4 @@ We define a corresponding **sink job** named ``sink`` in ``/etc/zrepl/zrepl.yml`
 Go Back To Quickstart Guide
 ---------------------------
 
-:ref:`Click here <quickstart-apply-config>` to go back to the quickstart guide.
+:ref:`Click here <quickstart-apply-config>` to go back to the quickstart guide.

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| Cyberiada GmbH
+* |supporter-std| `Gordon Schulz <https://github.com/azmodude>`_
+* |supporter-std| `@jwittlincohen <https://github.com/jwittlincohen>`_
+* |supporter-std| `Michael D. Schmitt <https://waterbendingscroll.dancingdragons.org>`_
 * |supporter-std| `Hans Schulz <https://github.com/schulzh>`_
 * |supporter-std| Henning Kessler
 * |supporter-std| `John Ramsden <https://github.com/johnramsden>`_
@@ -44,7 +48,7 @@ We would like to thank the following people and organizations for supporting zre
 * |supporter-gold| `MNX.io <https://mnx.io>`_
 * |supporter-std| `Marshall Clyburn <https://github.com/mdclyburn>`_
 * |supporter-code| `Ross Williams <https://github.com/overhacked>`_
-* |supporter-std| Mike T.
+* |supporter-gold| Mike T.
 * |supporter-code| `Justin Scholz <https://github.com/JMoVS>`_
 * |supporter-code| `InsanePrawn <https://github.com/InsanePrawn>`_
 * |supporter-code| `Ben Woods <https://www.freshports.org/sysutils/zrepl/>`_

endpoint/endpoint.go

@@ -10,25 +10,35 @@ import (
 
 	"github.com/kr/pretty"
 	"github.com/pkg/errors"
+
 	"github.com/zrepl/zrepl/daemon/logging/trace"
 
 	"github.com/zrepl/zrepl/replication/logic/pdu"
 	"github.com/zrepl/zrepl/util/chainedio"
 	"github.com/zrepl/zrepl/util/chainlock"
 	"github.com/zrepl/zrepl/util/envconst"
-	"github.com/zrepl/zrepl/util/semaphore"
+	"github.com/zrepl/zrepl/util/nodefault"
 	"github.com/zrepl/zrepl/zfs"
+	zfsprop "github.com/zrepl/zrepl/zfs/property"
 )
 
 type SenderConfig struct {
-	FSF     zfs.DatasetFilter
+	FSF   zfs.DatasetFilter
-	Encrypt *zfs.NilBool
+	JobID JobID
-	JobID   JobID
+
+	Encrypt              *nodefault.Bool
+	SendRaw              bool
+	SendProperties       bool
+	SendBackupProperties bool
+	SendLargeBlocks      bool
+	SendCompressed       bool
+	SendEmbeddedData     bool
+	SendSaved            bool
 }
 
 func (c *SenderConfig) Validate() error {
 	c.JobID.MustValidate()
-	if err := c.Encrypt.Validate(); err != nil {
+	if err := c.Encrypt.ValidateNoDefault(); err != nil {
 		return errors.Wrap(err, "`Encrypt` field invalid")
 	}
 	if _, err := StepHoldTag(c.JobID); err != nil {
@@ -39,9 +49,11 @@ func (c *SenderConfig) Validate() error {
 
 // Sender implements replication.ReplicationEndpoint for a sending side
 type Sender struct {
+	pdu.UnsafeReplicationServer // prefer compilation errors over default 'method X not implemented' impl
+
 	FSFilter zfs.DatasetFilter
-	encrypt  *zfs.NilBool
 	jobId    JobID
+	config   SenderConfig
 }
 
 func NewSender(conf SenderConfig) *Sender {
@@ -50,8 +62,8 @@ func NewSender(conf SenderConfig) *Sender {
 	}
 	return &Sender{
 		FSFilter: conf.FSF,
-		encrypt:  conf.Encrypt,
 		jobId:    conf.JobID,
+		config:   conf,
 	}
 }
 
@@ -117,9 +129,6 @@ func (s *Sender) ListFilesystemVersions(ctx context.Context, r *pdu.ListFilesyst
 
 }
 
-var maxConcurrentZFSSend = envconst.Int64("ZREPL_ENDPOINT_MAX_CONCURRENT_SEND", 10)
-var maxConcurrentZFSSendSemaphore = semaphore.New(maxConcurrentZFSSend)
-
 func uncheckedSendArgsFromPDU(fsv *pdu.FilesystemVersion) *zfs.ZFSSendArgVersion {
 	if fsv == nil {
 		return nil
@@ -151,12 +160,12 @@ func (s *Sender) Send(ctx context.Context, r *pdu.SendReq) (*pdu.SendRes, io.Rea
 		// use s.encrypt setting
 		// ok, fallthrough outer
 	case pdu.Tri_False:
-		if s.encrypt.B {
+		if s.config.Encrypt.B {
 			return nil, nil, errors.New("only encrypted sends allowed (send -w + encryption!= off), but unencrypted send requested")
 		}
 		// fallthrough outer
 	case pdu.Tri_True:
-		if !s.encrypt.B {
+		if !s.config.Encrypt.B {
 			return nil, nil, errors.New("only unencrypted sends allowed, but encrypted send requested")
 		}
 		// fallthrough outer
@@ -165,11 +174,20 @@ func (s *Sender) Send(ctx context.Context, r *pdu.SendReq) (*pdu.SendRes, io.Rea
 	}
 
 	sendArgsUnvalidated := zfs.ZFSSendArgsUnvalidated{
-		FS:          r.Filesystem,
+		FS:   r.Filesystem,
-		From:        uncheckedSendArgsFromPDU(r.GetFrom()), // validated by zfs.ZFSSendDry / zfs.ZFSSend
+		From: uncheckedSendArgsFromPDU(r.GetFrom()), // validated by zfs.ZFSSendDry / zfs.ZFSSend
-		To:          uncheckedSendArgsFromPDU(r.GetTo()),   // validated by zfs.ZFSSendDry / zfs.ZFSSend
+		To:   uncheckedSendArgsFromPDU(r.GetTo()),   // validated by zfs.ZFSSendDry / zfs.ZFSSend
-		Encrypted:   s.encrypt,
+		ZFSSendFlags: zfs.ZFSSendFlags{
-		ResumeToken: r.ResumeToken, // nil or not nil, depending on decoding success
+			ResumeToken:      r.ResumeToken, // nil or not nil, depending on decoding success
+			Encrypted:        s.config.Encrypt,
+			Properties:       s.config.SendProperties,
+			BackupProperties: s.config.SendBackupProperties,
+			Raw:              s.config.SendRaw,
+			LargeBlocks:      s.config.SendLargeBlocks,
+			Compressed:       s.config.SendCompressed,
+			EmbeddedData:     s.config.SendEmbeddedData,
+			Saved:            s.config.SendSaved,
+		},
 	}
 
 	sendArgs, err := sendArgsUnvalidated.Validate(ctx)
@@ -177,16 +195,6 @@ func (s *Sender) Send(ctx context.Context, r *pdu.SendReq) (*pdu.SendRes, io.Rea
 		return nil, nil, errors.Wrap(err, "validate send arguments")
 	}
 
-	getLogger(ctx).Debug("acquire concurrent send semaphore")
-	// TODO use try-acquire and fail with resource-exhaustion rpc status
-	// => would require handling on the client-side
-	// => this is a dataconn endpoint, doesn't have the status code semantics of gRPC
-	guard, err := maxConcurrentZFSSendSemaphore.Acquire(ctx)
-	if err != nil {
-		return nil, nil, err
-	}
-	defer guard.Release()
-
 	si, err := zfs.ZFSSendDry(ctx, sendArgs)
 	if err != nil {
 		return nil, nil, errors.Wrap(err, "zfs send dry failed")
@@ -421,19 +429,49 @@ type FSMap interface { // FIXME unused
 	AsFilter() FSFilter
 }
 
+// NOTE: when adding members to this struct, remember
+//       to add them to `ReceiverConfig.copyIn()`
 type ReceiverConfig struct {
 	JobID JobID
 
-	RootWithoutClientComponent *zfs.DatasetPath // TODO use
+	RootWithoutClientComponent *zfs.DatasetPath
 	AppendClientIdentity       bool
+
+	InheritProperties  []zfsprop.Property
+	OverrideProperties map[zfsprop.Property]string
 }
 
 func (c *ReceiverConfig) copyIn() {
 	c.RootWithoutClientComponent = c.RootWithoutClientComponent.Copy()
+
+	pInherit := make([]zfsprop.Property, len(c.InheritProperties))
+	copy(pInherit, c.InheritProperties)
+	c.InheritProperties = pInherit
+
+	pOverride := make(map[zfsprop.Property]string, len(c.OverrideProperties))
+	for key, value := range c.OverrideProperties {
+		pOverride[key] = value
+	}
+	c.OverrideProperties = pOverride
 }
 
 func (c *ReceiverConfig) Validate() error {
 	c.JobID.MustValidate()
+
+	for _, prop := range c.InheritProperties {
+		err := prop.Validate()
+		if err != nil {
+			return errors.Wrapf(err, "inherit property %q", prop)
+		}
+	}
+
+	for prop := range c.OverrideProperties {
+		err := prop.Validate()
+		if err != nil {
+			return errors.Wrapf(err, "override property %q", prop)
+		}
+	}
+
 	if c.RootWithoutClientComponent.Length() <= 0 {
 		return errors.New("RootWithoutClientComponent must not be an empty dataset path")
 	}
@@ -442,6 +480,8 @@ func (c *ReceiverConfig) Validate() error {
 
 // Receiver implements replication.ReplicationEndpoint for a receiving side
 type Receiver struct {
+	pdu.UnsafeReplicationServer // prefer compilation errors over default 'method X not implemented' impl
+
 	conf ReceiverConfig // validated
 
 	recvParentCreationMtx *chainlock.L
@@ -483,7 +523,7 @@ func (s *Receiver) clientRootFromCtx(ctx context.Context) *zfs.DatasetPath {
 
 	clientIdentity, ok := ctx.Value(ClientIdentityKey).(string)
 	if !ok {
-		panic(fmt.Sprintf("ClientIdentityKey context value must be set"))
+		panic("ClientIdentityKey context value must be set")
 	}
 
 	clientRoot, err := clientRoot(s.conf.RootWithoutClientComponent, clientIdentity)
@@ -628,8 +668,6 @@ func (s *Receiver) Send(ctx context.Context, req *pdu.SendReq) (*pdu.SendRes, io
 	return nil, nil, fmt.Errorf("receiver does not implement Send()")
 }
 
-var maxConcurrentZFSRecvSemaphore = semaphore.New(envconst.Int64("ZREPL_ENDPOINT_MAX_CONCURRENT_RECV", 10))
-
 func (s *Receiver) Receive(ctx context.Context, req *pdu.ReceiveReq, receive io.ReadCloser) (*pdu.ReceiveRes, error) {
 	defer trace.WithSpanFromStackUpdateCtx(&ctx)()
 
@@ -721,6 +759,10 @@ func (s *Receiver) Receive(ctx context.Context, req *pdu.ReceiveReq, receive io.
 		return nil, errors.Wrap(err, "cannot get placeholder state")
 	}
 	log.WithField("placeholder_state", fmt.Sprintf("%#v", ph)).Debug("placeholder state")
+
+	recvOpts.InheritProperties = s.conf.InheritProperties
+	recvOpts.OverrideProperties = s.conf.OverrideProperties
+
 	if ph.FSExists && ph.IsPlaceholder {
 		recvOpts.RollbackAndForceRecv = true
 		clearPlaceholderProperty = true
@@ -745,16 +787,6 @@ func (s *Receiver) Receive(ctx context.Context, req *pdu.ReceiveReq, receive io.
 		return nil, errors.Wrap(err, "cannot determine whether we can use resumable send & recv")
 	}
 
-	log.Debug("acquire concurrent recv semaphore")
-	// TODO use try-acquire and fail with resource-exhaustion rpc status
-	// => would require handling on the client-side
-	// => this is a dataconn endpoint, doesn't have the status code semantics of gRPC
-	guard, err := maxConcurrentZFSRecvSemaphore.Acquire(ctx)
-	if err != nil {
-		return nil, err
-	}
-	defer guard.Release()
-
 	var peek bytes.Buffer
 	var MaxPeek = envconst.Int64("ZREPL_ENDPOINT_RECV_PEEK_SIZE", 1<<20)
 	log.WithField("max_peek_bytes", MaxPeek).Info("peeking incoming stream")

endpoint/endpoint_abstractions_cache.go

@@ -6,6 +6,7 @@ import (
 	"sync"
 
 	"github.com/prometheus/client_golang/prometheus"
+
 	"github.com/zrepl/zrepl/daemon/logging/trace"
 	"github.com/zrepl/zrepl/util/chainlock"
 )

endpoint/endpoint_guarantees.go

@@ -5,6 +5,7 @@ import (
 	"fmt"
 
 	"github.com/pkg/errors"
+
 	"github.com/zrepl/zrepl/replication/logic/pdu"
 	"github.com/zrepl/zrepl/zfs"
 )

endpoint/endpoint_zfs_abstraction.go

@@ -13,6 +13,7 @@ import (
 
 	"github.com/zrepl/zrepl/daemon/logging/trace"
 	"github.com/zrepl/zrepl/util/envconst"
+	"github.com/zrepl/zrepl/util/nodefault"
 	"github.com/zrepl/zrepl/util/semaphore"
 	"github.com/zrepl/zrepl/zfs"
 )
@@ -257,7 +258,7 @@ type ListZFSHoldsAndBookmarksQuery struct {
 
 type CreateTXGRangeBound struct {
 	CreateTXG uint64
-	Inclusive *zfs.NilBool // must not be nil
+	Inclusive *nodefault.Bool // must not be nil
 }
 
 // A non-empty range of CreateTXGs
@@ -300,7 +301,7 @@ func (q *ListZFSHoldsAndBookmarksQuery) Validate() error {
 var createTXGRangeBoundAllowCreateTXG0 = envconst.Bool("ZREPL_ENDPOINT_LIST_ABSTRACTIONS_QUERY_CREATETXG_RANGE_BOUND_ALLOW_0", false)
 
 func (i *CreateTXGRangeBound) Validate() error {
-	if err := i.Inclusive.Validate(); err != nil {
+	if err := i.Inclusive.ValidateNoDefault(); err != nil {
 		return errors.Wrap(err, "Inclusive")
 	}
 	if i.CreateTXG == 0 && !createTXGRangeBoundAllowCreateTXG0 {
@@ -419,7 +420,7 @@ func (r *CreateTXGRange) String() string {
 	if r.Since == nil {
 		fmt.Fprintf(&buf, "~")
 	} else {
-		if err := r.Since.Inclusive.Validate(); err != nil {
+		if err := r.Since.Inclusive.ValidateNoDefault(); err != nil {
 			fmt.Fprintf(&buf, "?")
 		} else if r.Since.Inclusive.B {
 			fmt.Fprintf(&buf, "[")
@@ -435,7 +436,7 @@ func (r *CreateTXGRange) String() string {
 		fmt.Fprintf(&buf, "~")
 	} else {
 		fmt.Fprintf(&buf, "%d", r.Until.CreateTXG)
-		if err := r.Until.Inclusive.Validate(); err != nil {
+		if err := r.Until.Inclusive.ValidateNoDefault(); err != nil {
 			fmt.Fprintf(&buf, "?")
 		} else if r.Until.Inclusive.B {
 			fmt.Fprintf(&buf, "]")
@@ -579,16 +580,17 @@ func ListAbstractionsStreamed(ctx context.Context, query ListZFSHoldsAndBookmark
 
 		_, add, wait := trace.WithTaskGroup(ctx, "list-abstractions-impl-fs")
 		defer wait()
-		for i := range fss {
+		for _, fs := range fss {
+			fs := fs // capture by copy
 			add(func(ctx context.Context) {
 				g, err := sem.Acquire(ctx)
 				if err != nil {
-					errCb(err, fss[i], err.Error())
+					errCb(err, fs, err.Error())
 					return
 				}
 				func() {
 					defer g.Release()
-					listAbstractionsImplFS(ctx, fss[i], &query, emitAbstraction, errCb)
+					listAbstractionsImplFS(ctx, fs, &query, emitAbstraction, errCb)
 				}()
 			})
 		}
@@ -828,14 +830,14 @@ func listStaleFiltering(abs []Abstraction, sinceBound *CreateTXGRangeBound) *Sta
 					untilBound = &CreateTXGRangeBound{
 						CreateTXG: (*sfnsc.cursor).GetCreateTXG(),
 						// if we have a cursor, can throw away step hold on both From and To
-						Inclusive: &zfs.NilBool{B: true},
+						Inclusive: &nodefault.Bool{B: true},
 					}
 				} else if sfnsc.step != nil {
 					untilBound = &CreateTXGRangeBound{
 						CreateTXG: (*sfnsc.step).GetCreateTXG(),
 						// if we don't have a cursor, the step most recent step hold is our
 						// initial replication cursor and it's possibly still live (interrupted initial replication)
-						Inclusive: &zfs.NilBool{B: false},
+						Inclusive: &nodefault.Bool{B: false},
 					}
 				} else {
 					untilBound = nil // consider everything stale

endpoint/endpoint_zfs_abstraction_last_received_hold.go

@@ -6,6 +6,7 @@ import (
 	"regexp"
 
 	"github.com/pkg/errors"
+
 	"github.com/zrepl/zrepl/zfs"
 )
 

endpoint/endpoint_zfs_abstraction_replication_cursor.go

@@ -7,6 +7,7 @@ import (
 	"sort"
 
 	"github.com/pkg/errors"
+
 	"github.com/zrepl/zrepl/zfs"
 )
 

endpoint/endpoint_zfs_abstraction_test.go

@@ -9,7 +9,7 @@ import (
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 
-	"github.com/zrepl/zrepl/zfs"
+	"github.com/zrepl/zrepl/util/nodefault"
 )
 
 func TestCreateTXGRange(t *testing.T) {
@@ -47,8 +47,8 @@ func TestCreateTXGRange(t *testing.T) {
 			name:          "wrong order obvious",
 			expectInvalid: true,
 			config: &CreateTXGRange{
-				Since: &CreateTXGRangeBound{23, &zfs.NilBool{B: true}},
+				Since: &CreateTXGRangeBound{23, &nodefault.Bool{B: true}},
-				Until: &CreateTXGRangeBound{20, &zfs.NilBool{B: true}},
+				Until: &CreateTXGRangeBound{20, &nodefault.Bool{B: true}},
 			},
 			expectString: "[23,20]",
 		},
@@ -56,8 +56,8 @@ func TestCreateTXGRange(t *testing.T) {
 			name:          "wrong order edge-case could also be empty",
 			expectInvalid: true,
 			config: &CreateTXGRange{
-				Since: &CreateTXGRangeBound{23, &zfs.NilBool{B: false}},
+				Since: &CreateTXGRangeBound{23, &nodefault.Bool{B: false}},
-				Until: &CreateTXGRangeBound{22, &zfs.NilBool{B: true}},
+				Until: &CreateTXGRangeBound{22, &nodefault.Bool{B: true}},
 			},
 			expectString: "(23,22]",
 		},
@@ -65,8 +65,8 @@ func TestCreateTXGRange(t *testing.T) {
 			name:          "empty",
 			expectInvalid: true,
 			config: &CreateTXGRange{
-				Since: &CreateTXGRangeBound{2, &zfs.NilBool{B: false}},
+				Since: &CreateTXGRangeBound{2, &nodefault.Bool{B: false}},
-				Until: &CreateTXGRangeBound{2, &zfs.NilBool{B: false}},
+				Until: &CreateTXGRangeBound{2, &nodefault.Bool{B: false}},
 			},
 			expectString: "(2,2)",
 		},
@@ -74,8 +74,8 @@ func TestCreateTXGRange(t *testing.T) {
 			name:          "inclusive-since-exclusive-until",
 			expectInvalid: false,
 			config: &CreateTXGRange{
-				Since: &CreateTXGRangeBound{2, &zfs.NilBool{B: true}},
+				Since: &CreateTXGRangeBound{2, &nodefault.Bool{B: true}},
-				Until: &CreateTXGRangeBound{5, &zfs.NilBool{B: false}},
+				Until: &CreateTXGRangeBound{5, &nodefault.Bool{B: false}},
 			},
 			expectString: "[2,5)",
 			expect: []testCaseExpectation{
@@ -92,8 +92,8 @@ func TestCreateTXGRange(t *testing.T) {
 			name:          "exclusive-since-inclusive-until",
 			expectInvalid: false,
 			config: &CreateTXGRange{
-				Since: &CreateTXGRangeBound{2, &zfs.NilBool{B: false}},
+				Since: &CreateTXGRangeBound{2, &nodefault.Bool{B: false}},
-				Until: &CreateTXGRangeBound{5, &zfs.NilBool{B: true}},
+				Until: &CreateTXGRangeBound{5, &nodefault.Bool{B: true}},
 			},
 			expectString: "(2,5]",
 			expect: []testCaseExpectation{
@@ -111,7 +111,7 @@ func TestCreateTXGRange(t *testing.T) {
 			expectInvalid: true,
 			config: &CreateTXGRange{
 				Since: nil,
-				Until: &CreateTXGRangeBound{0, &zfs.NilBool{B: true}},
+				Until: &CreateTXGRangeBound{0, &nodefault.Bool{B: true}},
 			},
 			expectString: "~,0]",
 		},
@@ -119,7 +119,7 @@ func TestCreateTXGRange(t *testing.T) {
 			name:          "half-open-no-until",
 			expectInvalid: false,
 			config: &CreateTXGRange{
-				Since: &CreateTXGRangeBound{2, &zfs.NilBool{B: false}},
+				Since: &CreateTXGRangeBound{2, &nodefault.Bool{B: false}},
 				Until: nil,
 			},
 			expectString: "(2,~",
@@ -138,7 +138,7 @@ func TestCreateTXGRange(t *testing.T) {
 			expectInvalid: false,
 			config: &CreateTXGRange{
 				Since: nil,
-				Until: &CreateTXGRangeBound{4, &zfs.NilBool{B: true}},
+				Until: &CreateTXGRangeBound{4, &nodefault.Bool{B: true}},
 			},
 			expectString: "~,4]",
 			expect: []testCaseExpectation{
@@ -154,7 +154,7 @@ func TestCreateTXGRange(t *testing.T) {
 			name:          "edgeSince",
 			expectInvalid: false,
 			config: &CreateTXGRange{
-				Since: &CreateTXGRangeBound{math.MaxUint64, &zfs.NilBool{B: true}},
+				Since: &CreateTXGRangeBound{math.MaxUint64, &nodefault.Bool{B: true}},
 				Until: nil,
 			},
 			expectString: "[18446744073709551615,~",
@@ -169,7 +169,7 @@ func TestCreateTXGRange(t *testing.T) {
 			name:          "edgeSinceNegative",
 			expectInvalid: true,
 			config: &CreateTXGRange{
-				Since: &CreateTXGRangeBound{math.MaxUint64, &zfs.NilBool{B: false}},
+				Since: &CreateTXGRangeBound{math.MaxUint64, &nodefault.Bool{B: false}},
 				Until: nil,
 			},
 			expectString: "(18446744073709551615,~",
@@ -178,7 +178,7 @@ func TestCreateTXGRange(t *testing.T) {
 			name:          "edgeUntil",
 			expectInvalid: false,
 			config: &CreateTXGRange{
-				Until: &CreateTXGRangeBound{0, &zfs.NilBool{B: true}},
+				Until: &CreateTXGRangeBound{0, &nodefault.Bool{B: true}},
 			},
 			configAllowZeroCreateTXG: true,
 			expectString:             "~,0]",
@@ -193,7 +193,7 @@ func TestCreateTXGRange(t *testing.T) {
 			expectInvalid:            true,
 			configAllowZeroCreateTXG: true,
 			config: &CreateTXGRange{
-				Until: &CreateTXGRangeBound{0, &zfs.NilBool{B: false}},
+				Until: &CreateTXGRangeBound{0, &nodefault.Bool{B: false}},
 			},
 			expectString: "~,0)",
 		},

go.mod

@@ -7,11 +7,15 @@ require (
 	github.com/gdamore/tcell v1.2.0
 	github.com/gitchander/permutation v0.0.0-20181107151852-9e56b92e9909
 	github.com/go-logfmt/logfmt v0.4.0
+	github.com/go-playground/universal-translator v0.17.0 // indirect
+	github.com/go-playground/validator v9.31.0+incompatible
 	github.com/go-sql-driver/mysql v1.4.1-0.20190907122137-b2c03bcae3d4
-	github.com/golang/protobuf v1.3.2
+	github.com/golang/protobuf v1.4.3
-	github.com/google/uuid v1.1.1
+	github.com/google/uuid v1.1.2
 	github.com/jinzhu/copier v0.0.0-20170922082739-db4671f3a9b8
+	github.com/kisielk/gotool v1.0.0 // indirect
 	github.com/kr/pretty v0.1.0
+	github.com/leodido/go-urn v1.2.1 // indirect
 	github.com/lib/pq v1.2.0
 	github.com/mattn/go-colorable v0.1.4 // indirect
 	github.com/mattn/go-isatty v0.0.8
@@ -28,15 +32,18 @@ require (
 	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/stretchr/testify v1.6.1
 	github.com/willf/bitset v1.1.10
 	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/net v0.0.0-20210119194325-5f4716e94777
 	golang.org/x/sync v0.0.0-20190423024810-112230192c58
-	golang.org/x/sys v0.0.0-20191026070338-33540a1f6037
+	golang.org/x/sys v0.0.0-20210124154548-22da62e12c0c
-	golang.org/x/tools v0.0.0-20190206041539-40960b6deb8e
+	golang.org/x/text v0.3.5 // indirect
+	golang.org/x/tools v0.0.0-20190524140312-2c0ae7006135
 	gonum.org/v1/gonum v0.7.0 // indirect
-	google.golang.org/grpc v1.17.0
+	google.golang.org/genproto v0.0.0-20210122163508-8081c04a3579 // indirect
+	google.golang.org/grpc v1.35.0
+	google.golang.org/protobuf v1.25.0
 )

go.sum

@@ -19,15 +19,21 @@ github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24
 github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+CedLV8=
 github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
 github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
+github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
 github.com/cespare/xxhash/v2 v2.1.0 h1:yTUvW7Vhb89inJ+8irsUqiWjh8iT6sQPZiQzI6ReGkA=
 github.com/cespare/xxhash/v2 v2.1.0/go.mod h1:dgIUBU3pDso/gPgZ1osOZ0iQf77oPR28Tjxl5dIMyVM=
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
+github.com/cncf/udpa/go v0.0.0-20201120205902-5459f2c99403/go.mod h1:WmhPx2Nbnhtbo57+VJT5O0JRkEi1Wbu0z5j0R8u5Hbk=
 github.com/coreos/etcd v3.3.10+incompatible/go.mod h1:uF7uidLiAD3TWHmW31ZFd/JWoc32PjwdhPthX9715RE=
 github.com/coreos/go-etcd v2.0.0+incompatible/go.mod h1:Jez6KQU2B/sWsbdaef3ED8NzMklzPG4d5KIOhIy30Tk=
 github.com/coreos/go-semver v0.2.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/envoyproxy/go-control-plane v0.9.0/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
+github.com/envoyproxy/go-control-plane v0.9.1-0.20191026205805-5f8ba28d4473/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
+github.com/envoyproxy/go-control-plane v0.9.9-0.20201210154907-fd9021fe5dad/go.mod h1:cXg6YxExXjJnVBQHBLXeUAgxn2UodCpnH306RInaBQk=
+github.com/envoyproxy/protoc-gen-validate v0.1.0/go.mod h1:iSmxcyjqTsJpI2R4NaDN7+kN2VEUnK/pcBlmesArF7c=
 github.com/fatih/color v1.6.0/go.mod h1:Zm6kSWBoL9eyXnKyktHP6abPY2pDugNf5KwzbycvMj4=
 github.com/fatih/color v1.7.0 h1:DkWD4oS2D8LGGgTQ6IvwJJXSL5Vp2ffcQg58nFV38Ys=
 github.com/fatih/color v1.7.0/go.mod h1:Zm6kSWBoL9eyXnKyktHP6abPY2pDugNf5KwzbycvMj4=
@@ -53,6 +59,12 @@ github.com/go-logfmt/logfmt v0.3.0/go.mod h1:Qt1PoO58o5twSAckw1HlFXLmHsOX5/0LbT9
 github.com/go-logfmt/logfmt v0.4.0 h1:MP4Eh7ZCb31lleYCFuwm0oe4/YGak+5l1vA2NOE80nA=
 github.com/go-logfmt/logfmt v0.4.0/go.mod h1:3RMwSq7FuexP4Kalkev3ejPJsZTpXXBr9+V4qmtdjCk=
 github.com/go-ole/go-ole v1.2.1/go.mod h1:7FAglXiTm7HKlQRDeOQ6ZNUHidzCWXuZWq/1dTyBNF8=
+github.com/go-playground/locales v0.13.0 h1:HyWk6mgj5qFqCT5fjGBuRArbVDfE4hi8+e8ceBS/t7Q=
+github.com/go-playground/locales v0.13.0/go.mod h1:taPMhCMXrRLJO55olJkUXHZBHCxTMfnGwq/HNwmWNS8=
+github.com/go-playground/universal-translator v0.17.0 h1:icxd5fm+REJzpZx7ZfpaD876Lmtgy7VtROAbHHXk8no=
+github.com/go-playground/universal-translator v0.17.0/go.mod h1:UkSxE5sNxxRwHyU+Scu5vgOQjsIJAF8j9muTVoKLVtA=
+github.com/go-playground/validator v9.31.0+incompatible h1:UA72EPEogEnq76ehGdEDp4Mit+3FDh548oRqwVgNsHA=
+github.com/go-playground/validator v9.31.0+incompatible/go.mod h1:yrEkQXlcI+PugkyDjY2bRrL/UBU4f3rvrgkN3V8JEig=
 github.com/go-sql-driver/mysql v1.4.1-0.20190907122137-b2c03bcae3d4 h1:0suja/iKSDbEIYLbrS/8C7iArJiWpgCNcR+zwAHu7Ig=
 github.com/go-sql-driver/mysql v1.4.1-0.20190907122137-b2c03bcae3d4/go.mod h1:zAC/RDZ24gD3HViQzih4MyKcchzm+sOG5ZlKdlhCg5w=
 github.com/go-stack/stack v1.8.0/go.mod h1:v0f6uXyyMGvRgIKkXu+yp6POWl0qKG85gN/melR3HDY=
@@ -88,6 +100,17 @@ github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5y
 github.com/golang/protobuf v1.3.1/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
 github.com/golang/protobuf v1.3.2 h1:6nsPYzhq5kReh6QImI3k5qWzO4PEbvbIW2cwSfR/6xs=
 github.com/golang/protobuf v1.3.2/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
+github.com/golang/protobuf v1.4.0-rc.1/go.mod h1:ceaxUfeHdC40wWswd/P6IGgMaK3YpKi5j83Wpe3EHw8=
+github.com/golang/protobuf v1.4.0-rc.1.0.20200221234624-67d41d38c208/go.mod h1:xKAWHe0F5eneWXFV3EuXVDTCmh+JuBKY0li0aMyXATA=
+github.com/golang/protobuf v1.4.0-rc.2/go.mod h1:LlEzMj4AhA7rCAGe4KMBDvJI+AwstrUpVNzEA03Pprs=
+github.com/golang/protobuf v1.4.0-rc.4.0.20200313231945-b860323f09d0/go.mod h1:WU3c8KckQ9AFe+yFwt9sWVRKCVIyN9cPHBJSNnbL67w=
+github.com/golang/protobuf v1.4.0/go.mod h1:jodUvKwWbYaEsadDk5Fwe5c77LiNKVO9IDvqG2KuDX0=
+github.com/golang/protobuf v1.4.1 h1:ZFgWrT+bLgsYPirOnRfKLYJLvssAegOj/hgyMFdJZe0=
+github.com/golang/protobuf v1.4.1/go.mod h1:U8fpvMrcmy5pZrNK1lt4xCsGvpyWQ/VVv6QDs8UjoX8=
+github.com/golang/protobuf v1.4.2 h1:+Z5KGCizgyZCbGh1KZqA0fcLLkwbsjIzS4aV2v7wJX0=
+github.com/golang/protobuf v1.4.2/go.mod h1:oDoupMAO8OvCJWAcko0GGGIgR6R6ocIYbsSw735rRwI=
+github.com/golang/protobuf v1.4.3 h1:JjCZWpVbqXDqFVmTfYWEVTMIYrL/NPdPSCHPJ0T/raM=
+github.com/golang/protobuf v1.4.3/go.mod h1:oDoupMAO8OvCJWAcko0GGGIgR6R6ocIYbsSw735rRwI=
 github.com/golangci/check v0.0.0-20180506172741-cfe4005ccda2/go.mod h1:k9Qvh+8juN+UKMCS/3jFtGICgW8O96FVaZsaxdzDkR4=
 github.com/golangci/dupl v0.0.0-20180902072040-3e9179ac440a/go.mod h1:ryS0uhF+x9jgbj/N71xsEqODy9BN81/GonCZiOzirOk=
 github.com/golangci/errcheck v0.0.0-20181223084120-ef45e06d44b6/go.mod h1:DbHgvLiFKX1Sh2T1w8Q/h4NAI8MHIpzCdnBUDTXU3I0=
@@ -114,9 +137,14 @@ github.com/golangci/unconvert v0.0.0-20180507085042-28b1c447d1f4/go.mod h1:Izgrg
 github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5aqRK0M=
 github.com/google/go-cmp v0.3.0 h1:crn/baboCvb5fXaQ0IJ1SGTsTVrWpDsCWC8EGETZijY=
 github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
+github.com/google/go-cmp v0.3.1/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
+github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+github.com/google/go-cmp v0.5.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
 github.com/google/uuid v1.1.1 h1:Gkbcsh/GbpXz7lPftLA3P6TYMwjCLYm83jiFQZF/3gY=
 github.com/google/uuid v1.1.1/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+github.com/google/uuid v1.1.2 h1:EVhdT+1Kseyi1/pUmXKaFxYsDNy9RQYkMWRH68J/W7Y=
+github.com/google/uuid v1.1.2/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/gostaticanalysis/analysisutil v0.0.0-20190318220348-4088753ea4d3/go.mod h1:eEOZF4jCKGi+aprrirO9e7WKB3beBRtWgqGunKl6pKE=
 github.com/hashicorp/hcl v0.0.0-20180404174102-ef8a98b0bbce/go.mod h1:oZtUIOe8dh44I2q6ScRibXws4Ajl+d+nod3AaR9vL5w=
 github.com/hashicorp/hcl v1.0.0/go.mod h1:E5yfLk+7swimpb2L/Alb/PJmXilQ/rhwaUYs4T20WEQ=
@@ -149,6 +177,8 @@ github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORN
 github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
 github.com/kr/text v0.1.0 h1:45sCR5RtlFHMR4UwH9sdQ5TC8v0qDQCHnXt+kaKSTVE=
 github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
+github.com/leodido/go-urn v1.2.1 h1:BqpAaACuzVSgi/VLzGZIobT2z4v53pjosyNd9Yv6n/w=
+github.com/leodido/go-urn v1.2.1/go.mod h1:zt4jvISO2HfUBqxjfIshjdMTYS56ZS/qv49ictyFfxY=
 github.com/lib/pq v1.2.0 h1:LXpIM/LZ5xGFhOpXAQUIMM1HdyqzVYM13zNdjCEEcA0=
 github.com/lib/pq v1.2.0/go.mod h1:5WUZQaWbwv1U+lTReE5YruASi9Al49XbQIvNi/34Woo=
 github.com/logrusorgru/aurora v0.0.0-20181002194514-a7b3b318ed4e/go.mod h1:7rIyQOR62GCctdiQpZ/zOJlFyk6y+94wXzv6RNZgaR4=
@@ -276,6 +306,10 @@ github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXf
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 github.com/stretchr/testify v1.4.0 h1:2E4SXV/wtOkTonXsotYi4li6zVWxYlZuYNCXe9XRJyk=
 github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
+github.com/stretchr/testify v1.5.1 h1:nOGnQDM7FYENwehXlg/kFVnos3rEvtKTjRvOWSzb6H4=
+github.com/stretchr/testify v1.5.1/go.mod h1:5W2xD1RspED5o8YsWQXVCued0rvSQ+mT+I5cxcmMvtA=
+github.com/stretchr/testify v1.6.1 h1:hDPOHmpOpP40lSULcqw7IrRb/u7w6RpDC9399XyoNd0=
+github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/theckman/goconstraint v1.11.0 h1:oBUwN5wpE4dwyPhRGraEgJsFTr+JtLWiDnaJZJeeXI0=
 github.com/theckman/goconstraint v1.11.0/go.mod h1:zkCR/f2kOULTk/h1ujgyB9BlCNLaqlQ6GN2Zl4mg81g=
 github.com/timakin/bodyclose v0.0.0-20190407043127-4a873e97b2bb/go.mod h1:Qimiffbc6q9tBWlVV6x0P9sat/ao1xEkREYPPj9hphk=
@@ -305,21 +339,28 @@ golang.org/x/crypto v0.0.0-20190313024323-a1f597ede03a/go.mod h1:djNgcEr1/C05ACk
 golang.org/x/crypto v0.0.0-20190325154230-a5d413f7728c/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/exp v0.0.0-20180321215751-8460e604b9de/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/exp v0.0.0-20180807140117-3d87b88a115f/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
+golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/exp v0.0.0-20190125153040-c74c464bbbf2 h1:y102fOLFqhV41b+4GPiJoa0k/x+pJcEi2/HB1Y5T6fU=
 golang.org/x/exp v0.0.0-20190125153040-c74c464bbbf2/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/image v0.0.0-20180708004352-c73c2afc3b81/go.mod h1:ux5Hcp/YLpHSI86hEcLt0YII63i6oz57MZXIpbrjZUs=
 golang.org/x/lint v0.0.0-20180702182130-06c8688daad7/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE=
 golang.org/x/lint v0.0.0-20181026193005-c67002cb31c3/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE=
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 golang.org/x/net v0.0.0-20170915142106-8351a756f30f/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
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 golang.org/x/net v0.0.0-20180826012351-8a410e7b638d/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180906233101-161cd47e91fd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180911220305-26e67e76b6c3/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20181106065722-10aee1819953/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20181114220301-adae6a3d119a/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
+golang.org/x/net v0.0.0-20190213061140-3a22650c66bd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/net v0.0.0-20190313220215-9f648a60d977/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/net v0.0.0-20190613194153-d28f0bde5980 h1:dfGZHvZk057jK2MCeWus/TowKpJ8y4AmooUzdBSR9GU=
 golang.org/x/net v0.0.0-20190613194153-d28f0bde5980/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
+golang.org/x/net v0.0.0-20210119194325-5f4716e94777 h1:003p0dJM77cxMSyCPFphvZf/Y5/NXf5fzg6ufd1/Oew=
+golang.org/x/net v0.0.0-20210119194325-5f4716e94777/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20181108010431-42b317875d0f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
@@ -342,25 +383,39 @@ golang.org/x/sys v0.0.0-20191010194322-b09406accb47 h1:/XfQ9z7ib8eEJX2hdgFTZJ/nt
 golang.org/x/sys v0.0.0-20191010194322-b09406accb47/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20191026070338-33540a1f6037 h1:YyJpGZS1sBuBCzLAR1VEpK193GlqGZbnPFnPV/5Rsb4=
 golang.org/x/sys v0.0.0-20191026070338-33540a1f6037/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210124154548-22da62e12c0c h1:VwygUrnw9jn88c4u8GD3rZQbqrP/tgas88tPUbBxQrk=
+golang.org/x/sys v0.0.0-20210124154548-22da62e12c0c/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/text v0.0.0-20170915090833-1cbadb444a80/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.0 h1:g61tztE5qeGQ89tm6NTjjM9VPIm088od1l6aSorWRWg=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
+golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
+golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
+golang.org/x/text v0.3.5 h1:i6eZZ+zk0SOf0xgBpEpPD18qWcJda6q1sxt3S0kzyUQ=
+golang.org/x/text v0.3.5/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/tools v0.0.0-20170915040203-e531a2a1c15f/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20180221164845-07fd8470d635/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20180525024113-a5b4c53f6e8b/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20180828015842-6cd1fcedba52/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
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 golang.org/x/tools v0.0.0-20181117154741-2ddaf7f79a09/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20181205014116-22934f0fdb62/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20190110163146-51295c7ec13a/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
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 golang.org/x/tools v0.0.0-20190121143147-24cd39ecf745/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20190206041539-40960b6deb8e h1:Io7mpb+aUAGF0MKxbyQ7HQl1VgB+cL6ZJZUFaFNqVV4=
 golang.org/x/tools v0.0.0-20190206041539-40960b6deb8e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20190213192042-740235f6c0d8/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
+golang.org/x/tools v0.0.0-20190226205152-f727befe758c/go.mod h1:9Yl7xja0Znq3iFh3HoIrodX9oNMXvdceNzlUR8zjMvY=
 golang.org/x/tools v0.0.0-20190311212946-11955173bddd/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
 golang.org/x/tools v0.0.0-20190311215038-5c2858a9cfe5/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
 golang.org/x/tools v0.0.0-20190322203728-c1a832b0ad89/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
 golang.org/x/tools v0.0.0-20190521203540-521d6ed310dd/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
+golang.org/x/tools v0.0.0-20190524140312-2c0ae7006135 h1:5Beo0mZN8dRzgrMMkDp0jc8YXQKx9DiJ2k1dkvGsn5A=
+golang.org/x/tools v0.0.0-20190524140312-2c0ae7006135/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
 golang.org/x/tools v0.0.0-20190524210228-3d17549cdc6b/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
+golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 gonum.org/v1/gonum v0.0.0-20180816165407-929014505bf4/go.mod h1:Y+Yx5eoAFn32cQvJDxZx5Dpnq+c3wtXuadVZAcxbbBo=
 gonum.org/v1/gonum v0.7.0 h1:Hdks0L0hgznZLG9nzXb8vZ0rRvqNvAcgAp84y7Mwkgw=
 gonum.org/v1/gonum v0.7.0/go.mod h1:L02bwd0sqlsvRv41G7wGWFCsVNZFv/k1xzGIxeANHGM=
@@ -368,13 +423,37 @@ gonum.org/v1/netlib v0.0.0-20190313105609-8cb42192e0e0/go.mod h1:wa6Ws7BG/ESfp6d
 gonum.org/v1/plot v0.0.0-20190515093506-e2840ee46a6b/go.mod h1:Wt8AAjI+ypCyYX3nZBvf6cAIx93T+c/OS2HFAYskSZc=
 google.golang.org/appengine v1.1.0 h1:igQkv0AAhEIvTEpD5LIpAfav2eeVO9HBTjvKHVJPRSs=
 google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
+google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
 google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8 h1:Nw54tB0rB7hY/N0NQvRW8DG4Yk3Q6T9cu9RcFQDu1tc=
 google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc=
 google.golang.org/genproto v0.0.0-20181202183823-bd91e49a0898 h1:yvw+zsSmSM02Z5H3ZdEV7B7Ql7eFrjQTnmByJvK+3J8=
 google.golang.org/genproto v0.0.0-20181202183823-bd91e49a0898/go.mod h1:7Ep/1NZk928CDR8SjdVbjWNpdIf6nzjE3BTgJDr2Atg=
+google.golang.org/genproto v0.0.0-20190819201941-24fa4b261c55/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc=
+google.golang.org/genproto v0.0.0-20200526211855-cb27e3aa2013 h1:+kGHl1aib/qcwaRi1CbqBZ1rk19r85MNUf8HaBghugY=
+google.golang.org/genproto v0.0.0-20200526211855-cb27e3aa2013/go.mod h1:NbSheEEYHJ7i3ixzK3sjbqSGDJWnxyFXZblF3eUsNvo=
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+google.golang.org/genproto v0.0.0-20210122163508-8081c04a3579/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
 google.golang.org/grpc v1.16.0/go.mod h1:0JHn/cJsOMiMfNA9+DeHDlAU7KAAB5GDlYFpa9MZMio=
 google.golang.org/grpc v1.17.0 h1:TRJYBgMclJvGYn2rIMjj+h9KtMt5r1Ij7ODVRIZkwhk=
 google.golang.org/grpc v1.17.0/go.mod h1:6QZJwpn2B+Zp71q/5VxRsJ6NXXVCE5NRUHRo+f3cWCs=
+google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
+google.golang.org/grpc v1.23.0/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg=
+google.golang.org/grpc v1.25.1/go.mod h1:c3i+UQWmh7LiEpx4sFZnkU36qjEYZ0imhYfXVyQciAY=
+google.golang.org/grpc v1.27.0 h1:rRYRFMVgRv6E0D70Skyfsr28tDXIuuPZyWGMPdMcnXg=
+google.golang.org/grpc v1.27.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
+google.golang.org/grpc v1.35.0 h1:TwIQcH3es+MojMVojxxfQ3l3OF2KzlRxML2xZq0kRo8=
+google.golang.org/grpc v1.35.0/go.mod h1:qjiiYl8FncCW8feJPdyg3v6XW24KsRHe+dy9BAGRRjU=
+google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
+google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
+google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQJ+fmap5saPgwCLgHXTUD7jkjRqWcaiX5VyM=
+google.golang.org/protobuf v1.20.1-0.20200309200217-e05f789c0967/go.mod h1:A+miEFZTKqfCUM6K7xSMQL9OKL/b6hQv+e19PK+JZNE=
+google.golang.org/protobuf v1.21.0/go.mod h1:47Nbq4nVaFHyn7ilMalzfO3qCViNmqZ2kzikPIcrTAo=
+google.golang.org/protobuf v1.22.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
+google.golang.org/protobuf v1.23.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
+google.golang.org/protobuf v1.23.1-0.20200526195155-81db48ad09cc/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
+google.golang.org/protobuf v1.24.0/go.mod h1:r/3tXBNzIEhYS9I1OUVjXDlt8tc493IdKGjtUeSXeh4=
+google.golang.org/protobuf v1.25.0 h1:Ejskq+SyPohKW+1uil0JJMtmHCgJPJ/qWTxr8qp+R4c=
+google.golang.org/protobuf v1.25.0/go.mod h1:9JNX74DMeImyA3h4bdi1ymwjUzf21/xIlbajtzgsN7c=
 gopkg.in/airbrake/gobrake.v2 v2.0.9/go.mod h1:/h5ZAUhDkGaJfjzjKLSjv6zCL6O0LLBxU4K+aSYdM/U=
 gopkg.in/alecthomas/kingpin.v2 v2.2.6 h1:jMFz6MfLP0/4fUyZle81rXUoxOBFi19VUFKVDOQfozc=
 gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
@@ -392,7 +471,11 @@ gopkg.in/yaml.v2 v2.0.0-20170812160011-eb3733d160e7/go.mod h1:JAlM8MvJe8wmxCU4Bl
 gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 honnef.co/go/tools v0.0.0-20180728063816-88497007e858/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 mvdan.cc/interfacer v0.0.0-20180901003855-c20040233aed/go.mod h1:Xkxe497xwlCKkIaQYRfC7CSLworTXY9RMqwhhCm+8Nc=
 mvdan.cc/lint v0.0.0-20170908181259-adc824a0674b/go.mod h1:2odslEg/xrtNQqCYg2/jCoyKnw3vv5biOc3JnIcYfL4=
 mvdan.cc/unparam v0.0.0-20190209190245-fbb59629db34/go.mod h1:H6SUd1XjIs+qQCyskXg5OFSrilMRUkD8ePJpHKDPaeY=

lazy.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 set -e
 
 
@@ -14,32 +14,35 @@ step() {
     echo "${bold}$1${normal}"
 }
 
-if ! type go >/dev/null; then
-    step "go binary not installed or not in \$PATH" 1>&2
-    exit 1
-fi
-
-if [ -z "$GOPATH" ]; then
-    step "Make sure you have your GOPATH configured correctly" 1>&2
-    exit 1
-fi
-
-CHECKOUTPATH="${GOPATH}/src/github.com/zrepl/zrepl"
-
 godep() {
     step "install build dependencies (versions pinned in build/go.mod and build/tools.go)"
+
+    if ! type go >/dev/null; then
+        step "go binary not installed or not in \$PATH" 1>&2
+        exit 1
+    fi
+
+    if [ -z "$GOPATH" ]; then
+        step "Your GOPATH is not configured correctly" 1>&2
+        exit 1
+    fi
+
+    if ! (echo "$PATH" | grep "${GOPATH}/bin" > /dev/null); then
+        step "GOPATH/bin is not in your PATH (it should be towards the start of it)"
+        exit 1
+    fi
+
     pushd "$(dirname "${BASH_SOURCE[0]}")"/build
     set -x
     export GO111MODULE=on # otherwise, a checkout of this repo in GOPATH will disable modules on Go 1.12 and earlier
-    go build -v -mod=readonly -o "$GOPATH/bin/stringer"      golang.org/x/tools/cmd/stringer
+    source <(go env)
-    go build -v -mod=readonly -o "$GOPATH/bin/protoc-gen-go" github.com/golang/protobuf/protoc-gen-go
+    export GOOS="$GOHOSTOS"
-    go build -v -mod=readonly -o "$GOPATH/bin/enumer"        github.com/alvaroloes/enumer
+    export GOARCH="$GOHOSTARCH"
-    go build -v -mod=readonly -o "$GOPATH/bin/goimports"     golang.org/x/tools/cmd/goimports
+    # TODO GOARM=$GOHOSTARM?
-    go build -v -mod=readonly -o "$GOPATH/bin/golangci-lint" github.com/golangci/golangci-lint/cmd/golangci-lint
+    cat tools.go | grep _ | awk -F'"' '{print $2}' | tee | xargs -tI '{}' go install '{}'
-    go build -v -mod=readonly -o "$GOPATH/bin/gocovmerge"    github.com/wadey/gocovmerge
     set +x
     popd
-    if ! type stringer || ! type protoc-gen-go || ! type enumer || ! type goimports || ! type golangci-lint || ! type gocovmerge; then
+    if ! type stringer || ! type protoc-gen-go || ! type protoc-gen-go-grpc || ! type enumer || ! type goimports || ! type golangci-lint || ! type gocovmerge; then
         echo "Installed dependencies but can't find them in \$PATH, adjust it to contain \$GOPATH/bin" 1>&2
         exit 1
     fi
@@ -51,8 +54,9 @@ docdep() {
         exit 1
     fi
     step "Installing doc build dependencies"
-    local reqpath="${CHECKOUTPATH}/docs/requirements.txt"
+    # shellcheck disable=SC2155
-    if [ ! -z "$ZREPL_LAZY_DOCS_REQPATH" ]; then
+    local reqpath="$(dirname "${BASH_SOURCE[0]}")/docs/requirements.txt"
+    if [ -n "$ZREPL_LAZY_DOCS_REQPATH" ]; then
         reqpath="$ZREPL_LAZY_DOCS_REQPATH"
     fi
     pip3 install -r "$reqpath"
@@ -63,9 +67,15 @@ release() {
     make release
 }
 
+# shellcheck disable=SC2198
+if [ -z "$@" ]; then
+    step "No command specified, exiting"
+    exit 1
+fi
+
 for cmd in "$@"; do
     case "$cmd" in
-        godep|docdep|release_bins|docs)
+        godep|docdep|release|docs)
             eval $cmd
             continue
             ;;

logger/datastructures.go

@@ -82,7 +82,7 @@ func (l Level) String() string {
 	case Error:
 		return "error"
 	default:
-		return string(l)
+		return fmt.Sprintf("unknown level %d", l)
 	}
 }
 

packaging/deb/Dockerfile

@@ -0,0 +1,11 @@
+FROM debian:latest
+
+RUN apt-get update && apt-get install -y \
+	build-essential \
+    devscripts \
+    dh-exec
+
+RUN mkdir -p /build/src && chmod -R 0777 /build
+
+WORKDIR /build/src
+

packaging/deb/debian/changelog.template

@@ -0,0 +1,5 @@
+zrepl (VERSION) unstable;
+
+  Check https://zrepl.github.io/changelog.html.
+
+ -- zrepl build process <me@cschwarz.com>  DATE_DASH_R_OUTPUT

packaging/deb/debian/compat

@@ -0,0 +1 @@
+11

packaging/deb/debian/control

@@ -0,0 +1,8 @@
+Source: zrepl
+Maintainer: Christian Schwarz <me@cschwarz.com>
+Build-Depends: dh-exec
+
+Package: zrepl
+Architecture: arm64 amd64 armhf i386
+Description: ZFS replication
+  zrepl is a one-stop solution for ZFS filesystem replication

packaging/deb/debian/rules

@@ -0,0 +1,50 @@
+#!/usr/bin/make -f
+
+%:
+	dh $@
+
+override_dh_strip:
+
+override_dh_auto_build:
+
+override_dh_auto_clean:
+
+	rm -rf debian/renamedir
+
+override_dh_auto_install:
+
+	# install the zrepl.service for
+	# dh_install_systemd and dh_systemd_{start,enable}
+	install dist/systemd/zrepl.service debian/zrepl.service
+	sed -i 's#ExecStart=/usr/local/bin/zrepl #ExecStart=/usr/bin/zrepl #' debian/zrepl.service
+	sed -i 's#ExecStartPre=/usr/local/bin/zrepl #ExecStartPre=/usr/bin/zrepl #' debian/zrepl.service
+
+	mkdir -p debian/renamedir
+
+	# install binary
+	stat artifacts/$(ZREPL_DPKG_ZREPL_BINARY_FILENAME)
+	cp --preserve=all artifacts/$(ZREPL_DPKG_ZREPL_BINARY_FILENAME) debian/renamedir/zrepl
+	dh_install debian/renamedir/zrepl usr/bin
+
+	# install bash completion
+	dh_install artifacts/bash_completion etc/bash_completion.d/zrepl
+	dh_install artifacts/_zrepl.zsh_completion usr/share/zsh/vendor-completions
+
+	# install docs
+	dh_install artifacts/docs/html usr/share/doc/zrepl/docs/
+
+	# install examples
+	dh_install config/samples/* usr/share/doc/zrepl/examples
+
+	# install default config
+	mkdir -p debian/tmp/etc/zrepl
+	chmod 0700 debian/tmp/etc/zrepl
+	sed 's#USR_SHARE_ZREPL#/usr/share/doc/zrepl#' packaging/systemd-default-zrepl.yml > debian/renamedir/zrepl.yml
+	dh_install debian/renamedir/zrepl.yml etc/zrepl
+
+	# save git revision of this packaging repo
+	echo $$(git rev-parse HEAD) > debian/packaging-repo-git-revision
+	dh_install debian/packaging-repo-git-revision usr/share/doc/zrepl
+
+override_dh_auto_test:
+	# don't run tests at this point

packaging/rpm/Dockerfile

@@ -0,0 +1,7 @@
+FROM fedora:latest
+
+RUN dnf install -y git make bash rpm-build 'dnf-command(builddep)'
+ADD packaging/rpm/zrepl.spec /tmp/zrepl.spec
+RUN dnf builddep -y /tmp/zrepl.spec
+RUN mkdir -p /build/src && chmod -R 0777 /build
+WORKDIR /build/src

packaging/rpm/zrepl.spec

@@ -0,0 +1,78 @@
+# This Spec file packages pre-built artifacts in the artifacts directory
+# into an RPM. This means that rpmbuild won't actually build any new artifacts
+#
+# Read the Makefile first, then come back here.
+
+# Global meta data
+Version:          SUBSTITUTED_BY_MAKEFILE
+%global common_description %{expand:
+zrepl is a one-stop, integrated solution for ZFS replication.}
+
+# use gzip to be compatible with centos7
+%define _source_payload w9.gzdio
+%define _binary_payload w9.gzdio
+
+# don't strip pre-built binaries
+%define __strip /usr/bin/true
+
+Name:             zrepl
+Release:          1
+Summary:          One-stop, integrated solution for ZFS replication
+License:          MIT
+URL:              https://zrepl.github.io/
+# Source: we use rpmbuild --build-in-tree => no source
+BuildRequires:    systemd
+Requires(post):   systemd
+Requires(preun):  systemd
+Requires(postun): systemd
+
+%description
+%{common_description}
+
+%prep
+# we use rpmbuild --build-in-tree => no prep or setup
+
+%build
+# we don't actually need to build anything here, that has already been done by the Makefile
+
+# Correct the path in the systemd unit file
+sed s:/usr/local/bin/:%{_bindir}/:g dist/systemd/zrepl.service > artifacts/rpmbuild/zrepl.service
+
+# Generate the default configuration file
+sed 's#USR_SHARE_ZREPL#%{_datadir}/doc/zrepl#' packaging/systemd-default-zrepl.yml > artifacts/rpmbuild/zrepl.yml
+
+%install
+install -Dm 0755 artifacts/%{_zrepl_binary_filename}    %{buildroot}%{_bindir}/zrepl
+install -Dm 0644 artifacts/rpmbuild/zrepl.service       %{buildroot}%{_unitdir}/zrepl.service
+install -Dm 0644 artifacts/_zrepl.zsh_completion        %{buildroot}%{_datadir}/zsh/site-functions/_zrepl
+install -Dm 0644 artifacts/bash_completion              %{buildroot}%{_datadir}/bash-completion/completions/zrepl
+install -Dm 0644 artifacts/rpmbuild/zrepl.yml           %{buildroot}%{_sysconfdir}/zrepl/zrepl.yml
+install -d                                              %{buildroot}%{_datadir}/doc/zrepl
+cp -a   artifacts/docs/html                             %{buildroot}%{_datadir}/doc/zrepl/html
+cp -a   config/samples                                  %{buildroot}%{_datadir}/doc/zrepl/examples
+
+%post
+%systemd_post zrepl.service
+
+
+%preun
+%systemd_preun zrepl.service
+
+
+%postun
+%systemd_postun_with_restart zrepl.service
+
+
+%files
+%defattr(-,root,root)
+%license LICENSE
+%{_bindir}/zrepl
+%config %{_unitdir}/zrepl.service
+%dir %{_sysconfdir}/zrepl
+%config %{_sysconfdir}/zrepl/zrepl.yml
+%{_datadir}/zsh/site-functions/_zrepl
+%{_datadir}/bash-completion/completions/zrepl
+%{_datadir}/doc/zrepl
+
+%changelog
+# TODO: auto-fill changelog from git? -> need same solution for debian

packaging/systemd-default-zrepl.yml

@@ -0,0 +1,13 @@
+global:
+  logging:
+    # use syslog instead of stdout because it makes journald happy
+    - type: syslog
+      format: human
+      level: warn
+
+jobs:
+#  - name: foo
+#    type: bar
+
+# see USR_SHARE_ZREPL/examples
+# or https://zrepl.github.io/configuration/overview.html

platformtest/harness/harness.go

@@ -11,6 +11,7 @@ import (
 
 	"github.com/fatih/color"
 	"github.com/pkg/errors"
+
 	"github.com/zrepl/zrepl/daemon/logging/trace"
 
 	"github.com/zrepl/zrepl/config"

platformtest/platformtest_ops.go

@@ -256,14 +256,14 @@ nextLine:
 
 		case string(DestroyRoot):
 			if comps.Scan() {
-				return nil, &LineError{scan.Text(), fmt.Sprintf("unexpected tokens at EOL")}
+				return nil, &LineError{scan.Text(), "unexpected tokens at EOL"}
 			}
 			stmts = append(stmts, &DestroyRootOp{rootds})
 			continue nextLine
 
 		case string(CreateRoot):
 			if comps.Scan() {
-				return nil, &LineError{scan.Text(), fmt.Sprintf("unexpected tokens at EOL")}
+				return nil, &LineError{scan.Text(), "unexpected tokens at EOL"}
 			}
 			stmts = append(stmts, &FSOp{Op: Add, Path: rootds})
 			continue nextLine
@@ -319,7 +319,7 @@ nextLine:
 		}
 
 		if comps.Scan() {
-			return nil, &LineError{scan.Text(), fmt.Sprintf("unexpected tokens at EOL")}
+			return nil, &LineError{scan.Text(), "unexpected tokens at EOL"}
 		}
 	}
 	return stmts, nil

platformtest/tests/generated_cases.go

@@ -24,12 +24,14 @@ var Cases = []Case{BatchDestroy,
 	ReplicationIsResumableFullSend__both_GuaranteeResumability,
 	ReplicationIsResumableFullSend__initial_GuaranteeIncrementalReplication_incremental_GuaranteeIncrementalReplication,
 	ReplicationIsResumableFullSend__initial_GuaranteeResumability_incremental_GuaranteeIncrementalReplication,
+	ReplicationPropertyReplicationWorks,
 	ReplicationReceiverErrorWhileStillSending,
 	ReplicationStepCompletedLostBehavior__GuaranteeIncrementalReplication,
 	ReplicationStepCompletedLostBehavior__GuaranteeResumability,
 	ResumableRecvAndTokenHandling,
 	ResumeTokenParsing,
-	SendArgsValidationEncryptedSendOfUnencryptedDatasetForbidden,
+	SendArgsValidationEncryptedSendOfUnencryptedDatasetForbidden__EncryptionSupported_false,
+	SendArgsValidationEncryptedSendOfUnencryptedDatasetForbidden__EncryptionSupported_true,
 	SendArgsValidationResumeTokenDifferentFilesystemForbidden,
 	SendArgsValidationResumeTokenEncryptionMismatchForbidden,
 	UndestroyableSnapshotParsing,

platformtest/tests/holds.go

@@ -4,6 +4,7 @@ import (
 	"path"
 
 	"github.com/stretchr/testify/require"
+
 	"github.com/zrepl/zrepl/platformtest"
 	"github.com/zrepl/zrepl/zfs"
 )

platformtest/tests/idempotentBookmark.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 
 	"github.com/stretchr/testify/assert"
+
 	"github.com/zrepl/zrepl/platformtest"
 	"github.com/zrepl/zrepl/zfs"
 )

platformtest/tests/recvForceIntoEncryptedErr.go

@@ -4,11 +4,21 @@ import (
 	"fmt"
 
 	"github.com/stretchr/testify/require"
+
 	"github.com/zrepl/zrepl/platformtest"
+	"github.com/zrepl/zrepl/util/nodefault"
 	"github.com/zrepl/zrepl/zfs"
 )
 
 func ReceiveForceIntoEncryptedErr(ctx *platformtest.Context) {
+
+	supported, err := zfs.EncryptionCLISupported(ctx)
+	require.NoError(ctx, err, "encryption feature test failed")
+	if !supported {
+		ctx.SkipNow()
+		return
+	}
+
 	platformtest.Run(ctx, platformtest.PanicErr, ctx.RootDataset, `
 		DESTROYROOT
 		CREATEROOT
@@ -22,16 +32,19 @@ func ReceiveForceIntoEncryptedErr(ctx *platformtest.Context) {
 	sfsSnap1 := sendArgVersion(ctx, sfs, "@1")
 
 	sendArgs, err := zfs.ZFSSendArgsUnvalidated{
-		FS:          sfs,
+		FS:   sfs,
-		Encrypted:   &zfs.NilBool{B: false},
+		From: nil,
-		From:        nil,
+		To:   &sfsSnap1,
-		To:          &sfsSnap1,
+		ZFSSendFlags: zfs.ZFSSendFlags{
-		ResumeToken: "",
+			Encrypted:   &nodefault.Bool{B: false},
+			ResumeToken: "",
+		},
 	}.Validate(ctx)
 	require.NoError(ctx, err)
 
 	sendStream, err := zfs.ZFSSend(ctx, sendArgs)
 	require.NoError(ctx, err)
+	defer sendStream.Close()
 
 	recvOpts := zfs.RecvOptions{
 		RollbackAndForceRecv: true,

platformtest/tests/recvRollback.go

@@ -5,7 +5,9 @@ import (
 
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
+
 	"github.com/zrepl/zrepl/platformtest"
+	"github.com/zrepl/zrepl/util/nodefault"
 	"github.com/zrepl/zrepl/zfs"
 )
 
@@ -26,11 +28,13 @@ func ReceiveForceRollbackWorksUnencrypted(ctx *platformtest.Context) {
 	sfsSnap1 := sendArgVersion(ctx, sfs, "@1")
 
 	sendArgs, err := zfs.ZFSSendArgsUnvalidated{
-		FS:          sfs,
+		FS:   sfs,
-		Encrypted:   &zfs.NilBool{B: false},
+		From: nil,
-		From:        nil,
+		To:   &sfsSnap1,
-		To:          &sfsSnap1,
+		ZFSSendFlags: zfs.ZFSSendFlags{
-		ResumeToken: "",
+			Encrypted:   &nodefault.Bool{B: false},
+			ResumeToken: "",
+		},
 	}.Validate(ctx)
 	require.NoError(ctx, err)
 

platformtest/tests/replication.go

@@ -7,18 +7,23 @@ import (
 	"os"
 	"path"
 	"sort"
+	"time"
 
 	"github.com/kr/pretty"
 	"github.com/stretchr/testify/require"
+
 	"github.com/zrepl/zrepl/daemon/filters"
 	"github.com/zrepl/zrepl/endpoint"
 	"github.com/zrepl/zrepl/platformtest"
 	"github.com/zrepl/zrepl/replication"
+	"github.com/zrepl/zrepl/replication/driver"
 	"github.com/zrepl/zrepl/replication/logic"
 	"github.com/zrepl/zrepl/replication/logic/pdu"
 	"github.com/zrepl/zrepl/replication/report"
 	"github.com/zrepl/zrepl/util/limitio"
+	"github.com/zrepl/zrepl/util/nodefault"
 	"github.com/zrepl/zrepl/zfs"
+	zfsprop "github.com/zrepl/zrepl/zfs/property"
 )
 
 // mimics the replication invocations of an active-side job
@@ -28,13 +33,15 @@ import (
 // of a new sender and receiver instance and one blocking invocation
 // of the replication engine without encryption
 type replicationInvocation struct {
-	sjid, rjid        endpoint.JobID
+	sjid, rjid         endpoint.JobID
-	sfs               string
+	sfs                string
-	sfilter           *filters.DatasetMapFilter
+	sfilter            *filters.DatasetMapFilter
-	rfsRoot           string
+	rfsRoot            string
-	interceptSender   func(e *endpoint.Sender) logic.Sender
+	interceptSender    func(e *endpoint.Sender) logic.Sender
-	interceptReceiver func(e *endpoint.Receiver) logic.Receiver
+	interceptReceiver  func(e *endpoint.Receiver) logic.Receiver
-	guarantee         pdu.ReplicationConfigProtection
+	guarantee          *pdu.ReplicationConfigProtection
+	senderConfigHook   func(*endpoint.SenderConfig)
+	receiverConfigHook func(*endpoint.ReceiverConfig)
 }
 
 func (i replicationInvocation) Do(ctx *platformtest.Context) *report.Report {
@@ -54,25 +61,44 @@ func (i replicationInvocation) Do(ctx *platformtest.Context) *report.Report {
 		err := i.sfilter.Add(i.sfs, "ok")
 		require.NoError(ctx, err)
 	}
-	sender := i.interceptSender(endpoint.NewSender(endpoint.SenderConfig{
+
+	senderConfig := endpoint.SenderConfig{
 		FSF:     i.sfilter.AsFilter(),
-		Encrypt: &zfs.NilBool{B: false},
+		Encrypt: &nodefault.Bool{B: false},
 		JobID:   i.sjid,
-	}))
+	}
-	receiver := i.interceptReceiver(endpoint.NewReceiver(endpoint.ReceiverConfig{
+	if i.senderConfigHook != nil {
+		i.senderConfigHook(&senderConfig)
+	}
+
+	receiverConfig := endpoint.ReceiverConfig{
 		JobID:                      i.rjid,
 		AppendClientIdentity:       false,
 		RootWithoutClientComponent: mustDatasetPath(i.rfsRoot),
-	}))
+	}
+	if i.receiverConfigHook != nil {
+		i.receiverConfigHook(&receiverConfig)
+	}
+
+	require.Equal(ctx, senderConfig.JobID, i.sjid)
+	require.Equal(ctx, receiverConfig.JobID, i.rjid)
+
+	sender := i.interceptSender(endpoint.NewSender(senderConfig))
+	receiver := i.interceptReceiver(endpoint.NewReceiver(receiverConfig))
 	plannerPolicy := logic.PlannerPolicy{
 		EncryptedSend: logic.TriFromBool(false),
-		ReplicationConfig: pdu.ReplicationConfig{
+		ReplicationConfig: &pdu.ReplicationConfig{
-			Protection: &i.guarantee,
+			Protection: i.guarantee,
 		},
 	}
 
 	report, wait := replication.Do(
 		ctx,
+		driver.Config{
+			MaxAttempts:              1,
+			StepQueueConcurrency:     1,
+			ReconnectHardFailTimeout: 1 * time.Second,
+		},
 		logic.NewPlanner(nil, nil, sender, receiver, plannerPolicy),
 	)
 	wait(true)
@@ -105,7 +131,7 @@ func ReplicationIncrementalIsPossibleIfCommonSnapshotIsDestroyed(ctx *platformte
 		rjid:      rjid,
 		sfs:       sfs,
 		rfsRoot:   rfsRoot,
-		guarantee: *pdu.ReplicationConfigProtectionWithKind(pdu.ReplicationGuaranteeKind_GuaranteeResumability),
+		guarantee: pdu.ReplicationConfigProtectionWithKind(pdu.ReplicationGuaranteeKind_GuaranteeResumability),
 	}
 	rfs := rep.ReceiveSideFilesystem()
 
@@ -169,7 +195,7 @@ func implReplicationIncrementalCleansUpStaleAbstractions(ctx *platformtest.Conte
 		rjid:      rjid,
 		sfs:       sfs,
 		rfsRoot:   rfsRoot,
-		guarantee: *pdu.ReplicationConfigProtectionWithKind(pdu.ReplicationGuaranteeKind_GuaranteeResumability),
+		guarantee: pdu.ReplicationConfigProtectionWithKind(pdu.ReplicationGuaranteeKind_GuaranteeResumability),
 	}
 	rfs := rep.ReceiveSideFilesystem()
 
@@ -342,7 +368,7 @@ func (s *PartialSender) Send(ctx context.Context, r *pdu.SendReq) (r1 *pdu.SendR
 func ReplicationIsResumableFullSend__both_GuaranteeResumability(ctx *platformtest.Context) {
 
 	setup := replicationIsResumableFullSendSetup{
-		protection: pdu.ReplicationConfigProtection{
+		protection: &pdu.ReplicationConfigProtection{
 			Initial:     pdu.ReplicationGuaranteeKind_GuaranteeResumability,
 			Incremental: pdu.ReplicationGuaranteeKind_GuaranteeResumability,
 		},
@@ -357,7 +383,7 @@ func ReplicationIsResumableFullSend__both_GuaranteeResumability(ctx *platformtes
 func ReplicationIsResumableFullSend__initial_GuaranteeResumability_incremental_GuaranteeIncrementalReplication(ctx *platformtest.Context) {
 
 	setup := replicationIsResumableFullSendSetup{
-		protection: pdu.ReplicationConfigProtection{
+		protection: &pdu.ReplicationConfigProtection{
 			Initial:     pdu.ReplicationGuaranteeKind_GuaranteeResumability,
 			Incremental: pdu.ReplicationGuaranteeKind_GuaranteeIncrementalReplication,
 		},
@@ -372,7 +398,7 @@ func ReplicationIsResumableFullSend__initial_GuaranteeResumability_incremental_G
 func ReplicationIsResumableFullSend__initial_GuaranteeIncrementalReplication_incremental_GuaranteeIncrementalReplication(ctx *platformtest.Context) {
 
 	setup := replicationIsResumableFullSendSetup{
-		protection: pdu.ReplicationConfigProtection{
+		protection: &pdu.ReplicationConfigProtection{
 			Initial:     pdu.ReplicationGuaranteeKind_GuaranteeIncrementalReplication,
 			Incremental: pdu.ReplicationGuaranteeKind_GuaranteeIncrementalReplication,
 		},
@@ -385,7 +411,7 @@ func ReplicationIsResumableFullSend__initial_GuaranteeIncrementalReplication_inc
 }
 
 type replicationIsResumableFullSendSetup struct {
-	protection                                                          pdu.ReplicationConfigProtection
+	protection                                                          *pdu.ReplicationConfigProtection
 	expectDatasetIsBusyErrorWhenDestroySnapshotWhilePartiallyReplicated bool
 	expectAllThreeSnapshotsToThreeBePresentAfterLoop                    bool
 	expectNoSnapshotsOnReceiverAfterLoop                                bool
@@ -500,7 +526,7 @@ func ReplicationIncrementalDestroysStepHoldsIffIncrementalStepHoldsAreDisabledBu
 			rjid:      rjid,
 			sfs:       sfs,
 			rfsRoot:   rfsRoot,
-			guarantee: *pdu.ReplicationConfigProtectionWithKind(pdu.ReplicationGuaranteeKind_GuaranteeResumability),
+			guarantee: pdu.ReplicationConfigProtectionWithKind(pdu.ReplicationGuaranteeKind_GuaranteeResumability),
 		}
 		rfs := rep.ReceiveSideFilesystem()
 		report := rep.Do(ctx)
@@ -527,7 +553,7 @@ func ReplicationIncrementalDestroysStepHoldsIffIncrementalStepHoldsAreDisabledBu
 			rjid:      rjid,
 			sfs:       sfs,
 			rfsRoot:   rfsRoot,
-			guarantee: *pdu.ReplicationConfigProtectionWithKind(pdu.ReplicationGuaranteeKind_GuaranteeResumability), // !
+			guarantee: pdu.ReplicationConfigProtectionWithKind(pdu.ReplicationGuaranteeKind_GuaranteeResumability), // !
 			interceptSender: func(e *endpoint.Sender) logic.Sender {
 				return &PartialSender{Sender: e, failAfterByteCount: 1 << 20}
 			},
@@ -573,7 +599,7 @@ func ReplicationIncrementalDestroysStepHoldsIffIncrementalStepHoldsAreDisabledBu
 		rjid:      rjid,
 		sfs:       sfs,
 		rfsRoot:   rfsRoot,
-		guarantee: *pdu.ReplicationConfigProtectionWithKind(pdu.ReplicationGuaranteeKind_GuaranteeIncrementalReplication), // !
+		guarantee: pdu.ReplicationConfigProtectionWithKind(pdu.ReplicationGuaranteeKind_GuaranteeIncrementalReplication), // !
 		interceptSender: func(e *endpoint.Sender) logic.Sender {
 			return &PartialSender{Sender: e, failAfterByteCount: 1 << 20}
 		},
@@ -683,7 +709,7 @@ func replicationStepCompletedLostBehavior_impl(ctx *platformtest.Context, guaran
 			rjid:      rjid,
 			sfs:       sfs,
 			rfsRoot:   rfsRoot,
-			guarantee: *pdu.ReplicationConfigProtectionWithKind(guaranteeKind),
+			guarantee: pdu.ReplicationConfigProtectionWithKind(guaranteeKind),
 		}
 		rfs := rep.ReceiveSideFilesystem()
 		report := rep.Do(ctx)
@@ -701,7 +727,7 @@ func replicationStepCompletedLostBehavior_impl(ctx *platformtest.Context, guaran
 		rjid:      rjid,
 		sfs:       sfs,
 		rfsRoot:   rfsRoot,
-		guarantee: *pdu.ReplicationConfigProtectionWithKind(guaranteeKind),
+		guarantee: pdu.ReplicationConfigProtectionWithKind(guaranteeKind),
 		interceptSender: func(e *endpoint.Sender) logic.Sender {
 			return &FailSendCompletedSender{e}
 		},
@@ -749,7 +775,7 @@ func replicationStepCompletedLostBehavior_impl(ctx *platformtest.Context, guaran
 			rjid:      rjid,
 			sfs:       sfs,
 			rfsRoot:   rfsRoot,
-			guarantee: *pdu.ReplicationConfigProtectionWithKind(guaranteeKind),
+			guarantee: pdu.ReplicationConfigProtectionWithKind(guaranteeKind),
 		}
 		report := rep.Do(ctx)
 		ctx.Logf("expecting failure:\n%s", pretty.Sprint(report))
@@ -817,7 +843,7 @@ func ReplicationReceiverErrorWhileStillSending(ctx *platformtest.Context) {
 		rjid:      rjid,
 		sfs:       sfs,
 		rfsRoot:   rfsRoot,
-		guarantee: *pdu.ReplicationConfigProtectionWithKind(pdu.ReplicationGuaranteeKind_GuaranteeNothing),
+		guarantee: pdu.ReplicationConfigProtectionWithKind(pdu.ReplicationGuaranteeKind_GuaranteeNothing),
 		interceptReceiver: func(r *endpoint.Receiver) logic.Receiver {
 			return &ErroringReceiver{recvErr: mockRecvErr, Receiver: r}
 		},
@@ -879,7 +905,7 @@ func ReplicationFailingInitialParentProhibitsChildReplication(ctx *platformtest.
 		rjid:      rjid,
 		sfilter:   sfilter,
 		rfsRoot:   rfsRoot,
-		guarantee: *pdu.ReplicationConfigProtectionWithKind(pdu.ReplicationGuaranteeKind_GuaranteeNothing),
+		guarantee: pdu.ReplicationConfigProtectionWithKind(pdu.ReplicationGuaranteeKind_GuaranteeNothing),
 		interceptReceiver: func(r *endpoint.Receiver) logic.Receiver {
 			return &ErroringReceiver{recvErr: mockRecvErr, Receiver: r}
 		},
@@ -899,7 +925,7 @@ func ReplicationFailingInitialParentProhibitsChildReplication(ctx *platformtest.
 	}
 
 	require.Contains(ctx, fsByName, fsA)
-	require.Contains(ctx, fsByName, fsAA)
+	require.Contains(ctx, fsByName, fsAChild)
 	require.Contains(ctx, fsByName, fsAA)
 
 	checkFS := func(fs string, expectErrMsg string) {
@@ -914,3 +940,153 @@ func ReplicationFailingInitialParentProhibitsChildReplication(ctx *platformtest.
 	checkFS(fsAChild, "parent(s) failed during initial replication")
 	checkFS(fsAA, mockRecvErr.Error()) // fsAA is not treated as a child of fsA
 }
+
+func ReplicationPropertyReplicationWorks(ctx *platformtest.Context) {
+
+	platformtest.Run(ctx, platformtest.PanicErr, ctx.RootDataset, `
+		CREATEROOT
+		+  "sender"
+		+  "sender/a"
+		+  "sender/a@1"
+		+  "sender/a/child"
+		+  "sender/a/child@1"
+		+  "receiver"
+	`)
+
+	sjid := endpoint.MustMakeJobID("sender-job")
+	rjid := endpoint.MustMakeJobID("receiver-job")
+
+	fsA := ctx.RootDataset + "/sender/a"
+	fsAChild := ctx.RootDataset + "/sender/a/child"
+
+	sfilter := filters.NewDatasetMapFilter(2, true)
+	mustAddToSFilter := func(fs string) {
+		err := sfilter.Add(fs, "ok")
+		require.NoError(ctx, err)
+	}
+	mustAddToSFilter(fsA)
+	mustAddToSFilter(fsAChild)
+	rfsRoot := ctx.RootDataset + "/receiver"
+
+	type testPropExpectation struct {
+		Exists             bool
+		Source             zfs.PropertySource
+		ExpectSpecialValue string
+	}
+	type testProp struct {
+		Name           string
+		SetOnSender    map[string]bool
+		ExpectReceiver map[string]testPropExpectation
+	}
+	testProps := []testProp{
+		{
+			Name:        "zrepl:ignored",
+			SetOnSender: map[string]bool{fsA: true, fsAChild: true},
+			ExpectReceiver: map[string]testPropExpectation{
+				fsA: {
+					Exists: false,
+				},
+				fsAChild: {
+					Exists: false,
+				},
+			},
+		},
+		{
+			Name:        "zrepl:replicate",
+			SetOnSender: map[string]bool{fsA: true, fsAChild: true},
+			ExpectReceiver: map[string]testPropExpectation{
+				fsA:      {Exists: true, Source: zfs.SourceReceived},
+				fsAChild: {Exists: true, Source: zfs.SourceReceived},
+			},
+		},
+		{
+			Name:        "zrepl:overridden",
+			SetOnSender: map[string]bool{fsA: false, fsAChild: true},
+			ExpectReceiver: map[string]testPropExpectation{
+				fsA:      {Exists: true, Source: zfs.SourceLocal, ExpectSpecialValue: "overridden value"},
+				fsAChild: {Exists: true, Source: zfs.SourceLocal, ExpectSpecialValue: "overridden value"},
+			},
+		},
+	}
+
+	for _, prop := range testProps {
+		for fs := range prop.SetOnSender {
+			err := zfs.ZFSSet(ctx, mustDatasetPath(fs), map[string]string{prop.Name: prop.Name})
+			require.NoError(ctx, err)
+		}
+	}
+
+	rep := replicationInvocation{
+		sjid:      sjid,
+		rjid:      rjid,
+		sfilter:   sfilter,
+		rfsRoot:   rfsRoot,
+		guarantee: pdu.ReplicationConfigProtectionWithKind(pdu.ReplicationGuaranteeKind_GuaranteeNothing),
+		receiverConfigHook: func(c *endpoint.ReceiverConfig) {
+			c.InheritProperties = []zfsprop.Property{"zrepl:ignored"}
+			c.OverrideProperties = map[zfsprop.Property]string{
+				"zrepl:overridden": "overridden value",
+			}
+		},
+		senderConfigHook: func(c *endpoint.SenderConfig) {
+			c.SendProperties = true // TODO: do another tier with SendBackupProperties
+		},
+	}
+
+	r := rep.Do(ctx)
+	ctx.Logf("\n%s", pretty.Sprint(r))
+
+	require.Len(ctx, r.Attempts, 1)
+	attempt := r.Attempts[0]
+	require.Nil(ctx, attempt.PlanError)
+	require.Len(ctx, attempt.Filesystems, 2)
+
+	fsByName := make(map[string]*report.FilesystemReport, len(attempt.Filesystems))
+	for _, fs := range attempt.Filesystems {
+		fsByName[fs.Info.Name] = fs
+	}
+
+	require.Contains(ctx, fsByName, fsA)
+	require.Contains(ctx, fsByName, fsAChild)
+	require.Len(ctx, fsByName, 2)
+
+	requireFSReportSucceeded := func(fs string) *zfs.DatasetPath {
+		rep := fsByName[fs]
+		require.Len(ctx, rep.Steps, 1)
+		require.Nil(ctx, rep.PlanError)
+		require.Nil(ctx, rep.StepError)
+		require.Len(ctx, rep.Steps, 1)
+		require.Equal(ctx, 1, rep.CurrentStep)
+		return mustDatasetPath(path.Join(rfsRoot, fs))
+	}
+
+	rfsA := requireFSReportSucceeded(fsA)
+	rfsAChild := requireFSReportSucceeded(fsAChild)
+
+	rfsmap := map[string]*zfs.DatasetPath{
+		fsA:      rfsA,
+		fsAChild: rfsAChild,
+	}
+
+	for fs, rfs := range rfsmap {
+		for _, tp := range testProps {
+			r_, err := zfs.ZFSGet(ctx, rfs, []string{tp.Name})
+			require.NoError(ctx, err)
+			r := r_.GetDetails(tp.Name)
+
+			expect := tp.ExpectReceiver[fs]
+
+			if !expect.Exists {
+				require.Equal(ctx, zfs.SourceNone, r.Source)
+			} else {
+				require.Equal(ctx, expect.Source, r.Source)
+
+				if expect.ExpectSpecialValue != "" {
+					require.Equal(ctx, expect.ExpectSpecialValue, r.Value)
+				} else {
+					require.Equal(ctx, tp.Name, r.Value)
+				}
+			}
+		}
+	}
+}

platformtest/tests/resumableRecvAndTokenHandling.go

@@ -6,6 +6,7 @@ import (
 	"github.com/stretchr/testify/require"
 
 	"github.com/zrepl/zrepl/platformtest"
+	"github.com/zrepl/zrepl/util/nodefault"
 	"github.com/zrepl/zrepl/zfs"
 )
 
@@ -26,10 +27,12 @@ func ResumableRecvAndTokenHandling(ctx *platformtest.Context) {
 	src := makeDummyDataSnapshots(ctx, sendFS)
 
 	s := makeResumeSituation(ctx, src, recvFS, zfs.ZFSSendArgsUnvalidated{
-		FS:          sendFS,
+		FS: sendFS,
-		To:          src.snapA,
+		To: src.snapA,
-		Encrypted:   &zfs.NilBool{B: false},
+		ZFSSendFlags: zfs.ZFSSendFlags{
-		ResumeToken: "",
+			Encrypted:   &nodefault.Bool{B: false},
+			ResumeToken: "",
+		},
 	}, zfs.RecvOptions{
 		RollbackAndForceRecv: false, // doesnt' exist yet
 		SavePartialRecvState: true,

platformtest/tests/sendArgsValidation.go

@@ -6,14 +6,26 @@ import (
 	"github.com/stretchr/testify/require"
 
 	"github.com/zrepl/zrepl/platformtest"
+	"github.com/zrepl/zrepl/util/nodefault"
 	"github.com/zrepl/zrepl/zfs"
 )
 
-func SendArgsValidationEncryptedSendOfUnencryptedDatasetForbidden(ctx *platformtest.Context) {
+func SendArgsValidationEncryptedSendOfUnencryptedDatasetForbidden__EncryptionSupported_true(ctx *platformtest.Context) {
+	sendArgsValidationEncryptedSendOfUnencryptedDatasetForbidden_impl(ctx, true)
+}
+
+func SendArgsValidationEncryptedSendOfUnencryptedDatasetForbidden__EncryptionSupported_false(ctx *platformtest.Context) {
+	sendArgsValidationEncryptedSendOfUnencryptedDatasetForbidden_impl(ctx, false)
+}
+
+func sendArgsValidationEncryptedSendOfUnencryptedDatasetForbidden_impl(ctx *platformtest.Context, testForEncryptionSupported bool) {
 
 	supported, err := zfs.EncryptionCLISupported(ctx)
 	check(err)
-	expectNotSupportedErr := !supported
+	if supported != testForEncryptionSupported {
+		ctx.SkipNow()
+	}
+	noEncryptionCLISupport := !supported
 
 	platformtest.Run(ctx, platformtest.PanicErr, ctx.RootDataset, `
 	DESTROYROOT
@@ -31,8 +43,10 @@ func SendArgsValidationEncryptedSendOfUnencryptedDatasetForbidden(ctx *platformt
 			RelName: "@a snap",
 			GUID:    props.Guid,
 		},
-		Encrypted:   &zfs.NilBool{B: true},
+		ZFSSendFlags: zfs.ZFSSendFlags{
-		ResumeToken: "",
+			Encrypted:   &nodefault.Bool{B: true},
+			ResumeToken: "",
+		},
 	}.Validate(ctx)
 
 	var stream *zfs.SendStream
@@ -44,9 +58,11 @@ func SendArgsValidationEncryptedSendOfUnencryptedDatasetForbidden(ctx *platformt
 		// fallthrough
 	}
 
-	if expectNotSupportedErr {
+	if noEncryptionCLISupport {
 		require.Error(ctx, err)
-		require.Equal(ctx, zfs.ErrEncryptedSendNotSupported, err)
+		saverr, ok := err.(*zfs.ZFSSendArgsValidationError)
+		require.True(ctx, ok, "%T", err)
+		require.Equal(ctx, zfs.ZFSSendArgsEncryptedSendRequestedButFSUnencrypted, saverr.What)
 		return
 	}
 	require.Error(ctx, err)
@@ -82,18 +98,18 @@ func SendArgsValidationResumeTokenEncryptionMismatchForbidden(ctx *platformtest.
 	src := makeDummyDataSnapshots(ctx, sendFS)
 
 	unencS := makeResumeSituation(ctx, src, unencRecvFS, zfs.ZFSSendArgsUnvalidated{
-		FS:        sendFS,
+		FS:           sendFS,
-		To:        src.snapA,
+		To:           src.snapA,
-		Encrypted: &zfs.NilBool{B: false}, // !
+		ZFSSendFlags: zfs.ZFSSendFlags{Encrypted: &nodefault.Bool{B: false}}, // !
 	}, zfs.RecvOptions{
 		RollbackAndForceRecv: false,
 		SavePartialRecvState: true,
 	})
 
 	encS := makeResumeSituation(ctx, src, encRecvFS, zfs.ZFSSendArgsUnvalidated{
-		FS:        sendFS,
+		FS:           sendFS,
-		To:        src.snapA,
+		To:           src.snapA,
-		Encrypted: &zfs.NilBool{B: true}, // !
+		ZFSSendFlags: zfs.ZFSSendFlags{Encrypted: &nodefault.Bool{B: true}}, // !
 	}, zfs.RecvOptions{
 		RollbackAndForceRecv: false,
 		SavePartialRecvState: true,
@@ -138,13 +154,7 @@ func SendArgsValidationResumeTokenEncryptionMismatchForbidden(ctx *platformtest.
 }
 
 func SendArgsValidationResumeTokenDifferentFilesystemForbidden(ctx *platformtest.Context) {
-
+	supported, err := zfs.ResumeSendSupported(ctx)
-	supported, err := zfs.EncryptionCLISupported(ctx)
-	check(err)
-	if !supported {
-		ctx.SkipNow()
-	}
-	supported, err = zfs.ResumeSendSupported(ctx)
 	check(err)
 	if !supported {
 		ctx.SkipNow()
@@ -165,9 +175,9 @@ func SendArgsValidationResumeTokenDifferentFilesystemForbidden(ctx *platformtest
 	src2 := makeDummyDataSnapshots(ctx, sendFS2)
 
 	rs := makeResumeSituation(ctx, src1, recvFS, zfs.ZFSSendArgsUnvalidated{
-		FS:        sendFS1,
+		FS:           sendFS1,
-		To:        src1.snapA,
+		To:           src1.snapA,
-		Encrypted: &zfs.NilBool{B: false},
+		ZFSSendFlags: zfs.ZFSSendFlags{Encrypted: &nodefault.Bool{B: false}},
 	}, zfs.RecvOptions{
 		RollbackAndForceRecv: false,
 		SavePartialRecvState: true,
@@ -181,8 +191,10 @@ func SendArgsValidationResumeTokenDifferentFilesystemForbidden(ctx *platformtest
 			RelName: src2.snapA.RelName,
 			GUID:    src2.snapA.GUID,
 		},
-		Encrypted:   &zfs.NilBool{B: false},
+		ZFSSendFlags: zfs.ZFSSendFlags{
-		ResumeToken: rs.recvErrDecoded.ResumeTokenRaw,
+			Encrypted:   &nodefault.Bool{B: false},
+			ResumeToken: rs.recvErrDecoded.ResumeTokenRaw,
+		},
 	}
 	_, err = maliciousSend.Validate(ctx)
 	require.Error(ctx, err)

pruning/keep_grid.go

@@ -3,7 +3,6 @@ package pruning
 import (
 	"fmt"
 	"regexp"
-	"sort"
 	"time"
 
 	"github.com/pkg/errors"
@@ -30,75 +29,88 @@ func NewKeepGrid(in *config.PruneGrid) (p *KeepGrid, err error) {
 		return nil, errors.Wrap(err, "Regex is invalid")
 	}
 
+	return newKeepGrid(re, in.Grid)
+}
+
+func MustNewKeepGrid(regex, gridspec string) *KeepGrid {
+
+	ris, err := config.ParseRetentionIntervalSpec(gridspec)
+	if err != nil {
+		panic(err)
+	}
+
+	re := regexp.MustCompile(regex)
+
+	grid, err := newKeepGrid(re, ris)
+	if err != nil {
+		panic(err)
+	}
+	return grid
+}
+
+func newKeepGrid(re *regexp.Regexp, configIntervals []config.RetentionInterval) (*KeepGrid, error) {
+	if re == nil {
+		panic("re must not be nil")
+	}
+
+	if len(configIntervals) == 0 {
+		return nil, errors.New("retention grid must specify at least one interval")
+	}
+
+	intervals := make([]retentiongrid.Interval, len(configIntervals))
+	for i := range configIntervals {
+		intervals[i] = &configIntervals[i]
+	}
+
 	// Assert intervals are of increasing length (not necessarily required, but indicates config mistake)
 	lastDuration := time.Duration(0)
-	for i := range in.Grid {
+	for i := range intervals {
 
-		if in.Grid[i].Length() < lastDuration {
+		if intervals[i].Length() < lastDuration {
 			// If all intervals before were keep=all, this is ok
 			allPrevKeepCountAll := true
 			for j := i - 1; allPrevKeepCountAll && j >= 0; j-- {
-				allPrevKeepCountAll = in.Grid[j].KeepCount() == config.RetentionGridKeepCountAll
+				allPrevKeepCountAll = intervals[j].KeepCount() == config.RetentionGridKeepCountAll
 			}
 			if allPrevKeepCountAll {
 				goto isMonotonicIncrease
 			}
-			err = errors.New("retention grid interval length must be monotonically increasing")
+			return nil, errors.New("retention grid interval length must be monotonically increasing")
-			return
 		}
 	isMonotonicIncrease:
-		lastDuration = in.Grid[i].Length()
+		lastDuration = intervals[i].Length()
-
-	}
-
-	retentionIntervals := make([]retentiongrid.Interval, len(in.Grid))
-	for i := range in.Grid {
-		retentionIntervals[i] = &in.Grid[i]
 	}
 
 	return &KeepGrid{
-		retentiongrid.NewGrid(retentionIntervals),
+		retentionGrid: retentiongrid.NewGrid(intervals),
-		re,
+		re:            re,
 	}, nil
 }
 
-type retentionGridAdaptor struct {
-	Snapshot
-}
-
-func (a retentionGridAdaptor) LessThan(b retentiongrid.Entry) bool {
-	return a.Date().Before(b.Date())
-}
-
 // Prune filters snapshots with the retention grid.
 func (p *KeepGrid) KeepRule(snaps []Snapshot) (destroyList []Snapshot) {
 
-	snaps = filterSnapList(snaps, func(snapshot Snapshot) bool {
+	matching, notMatching := partitionSnapList(snaps, func(snapshot Snapshot) bool {
 		return p.re.MatchString(snapshot.Name())
 	})
-	if len(snaps) == 0 {
-		return nil
-	}
 
-	// Build adaptors for retention grid
+	// snaps that don't match the regex are not kept by this rule
-	adaptors := make([]retentiongrid.Entry, 0)
+	destroyList = append(destroyList, notMatching...)
-	for i := range snaps {
-		adaptors = append(adaptors, retentionGridAdaptor{snaps[i]})
-	}
 
-	// determine 'now' edge
+	if len(matching) == 0 {
-	sort.SliceStable(adaptors, func(i, j int) bool {
+		return destroyList
-		return adaptors[i].LessThan(adaptors[j])
+	}
-	})
-	now := adaptors[len(adaptors)-1].Date()
 
 	// Evaluate retention grid
-	_, removea := p.retentionGrid.FitEntries(now, adaptors)
+	entrySlice := make([]retentiongrid.Entry, 0)
+	for i := range matching {
+		entrySlice = append(entrySlice, matching[i])
+	}
+	_, gridDestroyList := p.retentionGrid.FitEntries(entrySlice)
 
 	// Revert adaptors
-	destroyList = make([]Snapshot, len(removea))
+	for i := range gridDestroyList {
-	for i := range removea {
+		destroyList = append(destroyList, gridDestroyList[i].(Snapshot))
-		destroyList[i] = removea[i].(retentionGridAdaptor).Snapshot
 	}
 	return destroyList
 }

pruning/keep_helpers.go

@@ -10,6 +10,17 @@ func filterSnapList(snaps []Snapshot, predicate func(Snapshot) bool) []Snapshot
 	return r
 }
 
+func partitionSnapList(snaps []Snapshot, predicate func(Snapshot) bool) (sTrue, sFalse []Snapshot) {
+	for i := range snaps {
+		if predicate(snaps[i]) {
+			sTrue = append(sTrue, snaps[i])
+		} else {
+			sFalse = append(sFalse, snaps[i])
+		}
+	}
+	return
+}
+
 func shallowCopySnapList(snaps []Snapshot) []Snapshot {
 	c := make([]Snapshot, len(snaps))
 	copy(c, snaps)

pruning/keep_last_n.go

@@ -1,20 +1,35 @@
 package pruning
 
 import (
+	"regexp"
 	"sort"
+	"strings"
 
 	"github.com/pkg/errors"
 )
 
 type KeepLastN struct {
-	n int
+	n  int
+	re *regexp.Regexp
 }
 
-func NewKeepLastN(n int) (*KeepLastN, error) {
+func MustKeepLastN(n int, regex string) *KeepLastN {
+	k, err := NewKeepLastN(n, regex)
+	if err != nil {
+		panic(err)
+	}
+	return k
+}
+
+func NewKeepLastN(n int, regex string) (*KeepLastN, error) {
 	if n <= 0 {
 		return nil, errors.Errorf("must specify positive number as 'keep last count', got %d", n)
 	}
-	return &KeepLastN{n}, nil
+	re, err := regexp.Compile(regex)
+	if err != nil {
+		return nil, errors.Errorf("invalid regex %q: %s", regex, err)
+	}
+	return &KeepLastN{n, re}, nil
 }
 
 func (k KeepLastN) KeepRule(snaps []Snapshot) (destroyList []Snapshot) {
@@ -23,11 +38,25 @@ func (k KeepLastN) KeepRule(snaps []Snapshot) (destroyList []Snapshot) {
 		return []Snapshot{}
 	}
 
-	res := shallowCopySnapList(snaps)
+	matching, notMatching := partitionSnapList(snaps, func(snapshot Snapshot) bool {
-
+		return k.re.MatchString(snapshot.Name())
-	sort.Slice(res, func(i, j int) bool {
-		return res[i].Date().After(res[j].Date())
 	})
+	// snaps that don't match the regex are not kept by this rule
+	destroyList = append(destroyList, notMatching...)
 
-	return res[k.n:]
+	if len(matching) == 0 {
+		return destroyList
+	}
+
+	sort.Slice(matching, func(i, j int) bool {
+		// by date (youngest first)
+		id, jd := matching[i].Date(), matching[j].Date()
+		if !id.Equal(jd) {
+			return id.After(jd)
+		}
+		// then lexicographically descending (e.g. b, a)
+		return strings.Compare(matching[i].Name(), matching[j].Name()) == 1
+	})
+	destroyList = append(destroyList, matching[k.n:]...)
+	return destroyList
 }

pruning/keep_last_n_test.go

@@ -5,6 +5,7 @@ import (
 	"time"
 
 	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
 )
 
 func TestKeepLastN(t *testing.T) {
@@ -28,7 +29,7 @@ func TestKeepLastN(t *testing.T) {
 		"keep2": {
 			inputs: inputs["s1"],
 			rules: []KeepRule{
-				KeepLastN{2},
+				MustKeepLastN(2, ""),
 			},
 			expDestroy: map[string]bool{
 				"1": true, "2": true, "3": true,
@@ -37,37 +38,66 @@ func TestKeepLastN(t *testing.T) {
 		"keep1OfTwoWithSameTime": { // Keep one of two with same time
 			inputs: inputs["s1"],
 			rules: []KeepRule{
-				KeepLastN{1},
+				MustKeepLastN(1, ""),
-			},
-			expDestroyAlternatives: []map[string]bool{
-				{"1": true, "2": true, "3": true, "4": true},
-				{"1": true, "2": true, "3": true, "5": true},
 			},
+			expDestroy: map[string]bool{"1": true, "2": true, "3": true, "4": true},
 		},
 		"keepMany": {
 			inputs: inputs["s1"],
 			rules: []KeepRule{
-				KeepLastN{100},
+				MustKeepLastN(100, ""),
 			},
 			expDestroy: map[string]bool{},
 		},
-		"empty": {
+		"empty_input": {
 			inputs: inputs["s2"],
 			rules: []KeepRule{
-				KeepLastN{100},
+				MustKeepLastN(100, ""),
 			},
 			expDestroy: map[string]bool{},
 		},
+		"empty_regex": {
+			inputs: inputs["s1"],
+			rules: []KeepRule{
+				MustKeepLastN(4, ""),
+			},
+			expDestroy: map[string]bool{
+				"1": true,
+			},
+		},
+		"multiple_regexes": {
+			inputs: []Snapshot{
+				stubSnap{"a1", false, o(10)},
+				stubSnap{"b1", false, o(11)},
+				stubSnap{"a2", false, o(20)},
+				stubSnap{"b2", false, o(21)},
+				stubSnap{"a3", false, o(30)},
+				stubSnap{"b3", false, o(31)},
+			},
+			rules: []KeepRule{
+				MustKeepLastN(2, "^a"),
+				MustKeepLastN(2, "^b"),
+			},
+			expDestroy: map[string]bool{
+				"a1": true,
+				"b1": true,
+			},
+		},
 	}
 
 	testTable(tcs, t)
 
 	t.Run("mustBePositive", func(t *testing.T) {
 		var err error
-		_, err = NewKeepLastN(0)
+		_, err = NewKeepLastN(0, "foo")
 		assert.Error(t, err)
-		_, err = NewKeepLastN(-5)
+		_, err = NewKeepLastN(-5, "foo")
 		assert.Error(t, err)
 	})
 
+	t.Run("emptyRegexAllowed", func(t *testing.T) {
+		_, err := NewKeepLastN(23, "")
+		require.NoError(t, err)
+	})
+
 }

pruning/pruning.go

@@ -60,7 +60,7 @@ func RuleFromConfig(in config.PruningEnum) (KeepRule, error) {
 	case *config.PruneKeepNotReplicated:
 		return NewKeepNotReplicated(), nil
 	case *config.PruneKeepLastN:
-		return NewKeepLastN(v.Count)
+		return NewKeepLastN(v.Count, v.Regex)
 	case *config.PruneKeepRegex:
 		return NewKeepRegex(v.Regex, v.Negate)
 	case *config.PruneGrid:

pruning/pruning_test.go

@@ -3,6 +3,9 @@ package pruning
 import (
 	"testing"
 	"time"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
 )
 
 type stubSnap struct {
@@ -18,10 +21,9 @@ func (s stubSnap) Replicated() bool { return s.replicated }
 func (s stubSnap) Date() time.Time { return s.date }
 
 type testCase struct {
-	inputs                 []Snapshot
+	inputs     []Snapshot
-	rules                  []KeepRule
+	rules      []KeepRule
-	expDestroy, effDestroy map[string]bool
+	expDestroy map[string]bool
-	expDestroyAlternatives []map[string]bool
 }
 
 type snapshotList []Snapshot
@@ -44,41 +46,20 @@ func (l snapshotList) NameList() []string {
 }
 
 func testTable(tcs map[string]testCase, t *testing.T) {
-	mapEqual := func(a, b map[string]bool) bool {
-		if len(a) != len(b) {
-			return false
-		}
-		for k, v := range a {
-			if w, ok := b[k]; !ok || v != w {
-				return false
-			}
-		}
-		return true
-	}
-
 	for name := range tcs {
 		t.Run(name, func(t *testing.T) {
 			tc := tcs[name]
-			remove := PruneSnapshots(tc.inputs, tc.rules)
+			destroyList := PruneSnapshots(tc.inputs, tc.rules)
-			tc.effDestroy = make(map[string]bool)
+			destroySet := make(map[string]bool, len(destroyList))
-			for _, s := range remove {
+			for _, s := range destroyList {
-				tc.effDestroy[s.Name()] = true
+				destroySet[s.Name()] = true
 			}
-			if tc.expDestroyAlternatives == nil {
+			t.Logf("destroySet:\n%#v", destroySet)
-				if tc.expDestroy == nil {
+			t.Logf("expected:\n%#v", tc.expDestroy)
-					panic("must specify either expDestroyAlternatives or expDestroy")
+
-				}
+			require.Equal(t, len(tc.expDestroy), len(destroySet))
-				tc.expDestroyAlternatives = []map[string]bool{tc.expDestroy}
+			for name := range destroySet {
-			}
+				assert.True(t, tc.expDestroy[name], "%q", name)
-			var okAlt map[string]bool = nil
-			for _, alt := range tc.expDestroyAlternatives {
-				t.Logf("testing possible result: %v", alt)
-				if mapEqual(alt, tc.effDestroy) {
-					okAlt = alt
-				}
-			}
-			if okAlt == nil {
-				t.Errorf("no alternatives matched result: %v", tc.effDestroy)
 			}
 		})
 	}
@@ -94,6 +75,10 @@ func TestPruneSnapshots(t *testing.T) {
 		},
 	}
 
+	reltime := func(secs int64) time.Time {
+		return time.Unix(secs, 0)
+	}
+
 	tcs := map[string]testCase{
 		"simple": {
 			inputs: inputs["s1"],
@@ -140,6 +125,24 @@ func TestPruneSnapshots(t *testing.T) {
 			},
 			expDestroy: map[string]bool{},
 		},
+		"multiple_grids_with_disjoint_regexes": {
+			inputs: []Snapshot{
+				stubSnap{"p1_a", false, reltime(4)},
+				stubSnap{"p2_a", false, reltime(5)},
+				stubSnap{"p1_b", false, reltime(14)},
+				stubSnap{"p2_b", false, reltime(15)},
+				stubSnap{"p1_c", false, reltime(29)},
+				stubSnap{"p2_c", false, reltime(30)},
+			},
+			rules: []KeepRule{
+				MustNewKeepGrid("^p1_", `1x10s | 1x10s`),
+				MustNewKeepGrid("^p2_", `1x10s | 1x10s`),
+			},
+			expDestroy: map[string]bool{
+				"p1_a": true,
+				"p2_a": true,
+			},
+		},
 	}
 
 	testTable(tcs, t)

pruning/retentiongrid/retentiongrid.go

@@ -16,85 +16,127 @@ type Grid struct {
 	intervals []Interval
 }
 
-//A point inside the grid, i.e. a thing the grid can decide to remove
 type Entry interface {
 	Date() time.Time
-	LessThan(b Entry) bool
-}
-
-func dateInInterval(date, startDateInterval time.Time, i Interval) bool {
-	return date.After(startDateInterval) && date.Before(startDateInterval.Add(i.Length()))
 }
 
 func NewGrid(l []Interval) *Grid {
+	if len(l) == 0 {
+		panic("must specify at least one interval")
+	}
 	// TODO Maybe check for ascending interval lengths here, although the algorithm
 	// 		itself doesn't care about that.
 	return &Grid{l}
 }
 
-// Partition a list of RetentionGridEntries into the Grid,
+func (g Grid) FitEntries(entries []Entry) (keep, remove []Entry) {
-// relative to a given start date `now`.
-//
-// The `keepCount` oldest entries per `retentiongrid.Interval` are kept (`keep`),
-// the others are removed (`remove`).
-//
-// Entries that are younger than `now` are always kept.
-// Those that are older than the earliest beginning of an interval are removed.
-func (g Grid) FitEntries(now time.Time, entries []Entry) (keep, remove []Entry) {
 
-	type bucket struct {
+	if len(entries) == 0 {
-		entries []Entry
+		return
 	}
+
+	// determine 'now' based on youngest snapshot
+	// => sort youngest-to-oldest
+	sort.SliceStable(entries, func(i, j int) bool {
+		return entries[i].Date().After(entries[j].Date())
+	})
+	now := entries[0].Date()
+
+	return g.fitEntriesWithNow(now, entries)
+}
+
+type bucket struct {
+	keepCount     int
+	youngerThan   time.Time
+	olderThanOrEq time.Time
+	entries       []Entry
+}
+
+func makeBucketFromInterval(olderThanOrEq time.Time, i Interval) bucket {
+	var b bucket
+	kc := i.KeepCount()
+	if kc == 0 {
+		panic("keep count 0 is not allowed")
+	}
+	if (kc < 0) && kc != RetentionGridKeepCountAll {
+		panic("negative keep counts are not allowed")
+	}
+	b.keepCount = kc
+	b.olderThanOrEq = olderThanOrEq
+	b.youngerThan = b.olderThanOrEq.Add(-i.Length())
+	return b
+}
+
+func (b *bucket) Contains(e Entry) bool {
+	d := e.Date()
+	olderThan := d.Before(b.olderThanOrEq)
+	eq := d.Equal(b.olderThanOrEq)
+	youngerThan := d.After(b.youngerThan)
+	return (olderThan || eq) && youngerThan
+}
+
+func (b *bucket) AddIfContains(e Entry) (added bool) {
+	added = b.Contains(e)
+	if added {
+		b.entries = append(b.entries, e)
+	}
+	return
+}
+
+func (b *bucket) RemoveYoungerSnapsExceedingKeepCount() (removed []Entry) {
+
+	if b.keepCount == RetentionGridKeepCountAll {
+		return nil
+	}
+
+	removeCount := len(b.entries) - b.keepCount
+	if removeCount <= 0 {
+		return nil
+	}
+
+	// sort youngest-to-oldest
+	sort.SliceStable(b.entries, func(i, j int) bool {
+		return b.entries[i].Date().After(b.entries[j].Date())
+	})
+
+	return b.entries[:removeCount]
+}
+
+func (g Grid) fitEntriesWithNow(now time.Time, entries []Entry) (keep, remove []Entry) {
+
 	buckets := make([]bucket, len(g.intervals))
 
+	buckets[0] = makeBucketFromInterval(now, g.intervals[0])
+	for i := 1; i < len(g.intervals); i++ {
+		buckets[i] = makeBucketFromInterval(buckets[i-1].youngerThan, g.intervals[i])
+	}
+
 	keep = make([]Entry, 0)
 	remove = make([]Entry, 0)
 
-	oldestIntervalStart := now
+assignEntriesToBuckets:
-	for i := range g.intervals {
-		oldestIntervalStart = oldestIntervalStart.Add(-g.intervals[i].Length())
-	}
-
 	for ei := 0; ei < len(entries); ei++ {
 		e := entries[ei]
-
+		// unconditionally keep entries that are in the future
-		date := e.Date()
+		if now.Before(e.Date()) {
-
-		if date == now || date.After(now) {
 			keep = append(keep, e)
-			continue
+			continue assignEntriesToBuckets
-		} else if date.Before(oldestIntervalStart) {
-			remove = append(remove, e)
-			continue
 		}
-
+		// add to matching bucket, if any
-		iStartTime := now
+		for bi := range buckets {
-		for i := 0; i < len(g.intervals); i++ {
+			if buckets[bi].AddIfContains(e) {
-			iStartTime = iStartTime.Add(-g.intervals[i].Length())
+				continue assignEntriesToBuckets
-			if date == iStartTime || dateInInterval(date, iStartTime, g.intervals[i]) {
-				buckets[i].entries = append(buckets[i].entries, e)
 			}
 		}
+		// unconditionally remove entries older than the oldest bucket
+		remove = append(remove, e)
 	}
 
-	for bi, b := range buckets {
+	// now apply the `KeepCount` per bucket
-
+	for _, b := range buckets {
-		interval := g.intervals[bi]
+		destroy := b.RemoveYoungerSnapsExceedingKeepCount()
-
+		remove = append(remove, destroy...)
-		sort.SliceStable(b.entries, func(i, j int) bool {
+		keep = append(keep, b.entries...)
-			return b.entries[i].LessThan((b.entries[j]))
-		})
-
-		i := 0
-		for ; (interval.KeepCount() == RetentionGridKeepCountAll || i < interval.KeepCount()) && i < len(b.entries); i++ {
-			keep = append(keep, b.entries[i])
-		}
-		for ; i < len(b.entries); i++ {
-			remove = append(remove, b.entries[i])
-		}
-
 	}
-
 	return
-
 }

pruning/retentiongrid/retentiongrid_test.go

@@ -10,25 +10,18 @@ import (
 	"github.com/stretchr/testify/assert"
 )
 
-type retentionIntervalStub struct {
+type testInterval struct {
 	length    time.Duration
 	keepCount int
 }
 
-func (i *retentionIntervalStub) Length() time.Duration {
+func (i *testInterval) Length() time.Duration { return i.length }
-	return i.length
+func (i *testInterval) KeepCount() int        { return i.keepCount }
-}
-
-func (i *retentionIntervalStub) KeepCount() int {
-	return i.keepCount
-}
 
 func gridFromString(gs string) (g *Grid) {
-	intervals := strings.Split(gs, "|")
+	sintervals := strings.Split(gs, "|")
-	g = &Grid{
+	intervals := make([]Interval, len(sintervals))
-		intervals: make([]Interval, len(intervals)),
+	for idx, i := range sintervals {
-	}
-	for idx, i := range intervals {
 		comps := strings.SplitN(i, ",", 2)
 		var durationStr, numSnapsStr string
 		durationStr = comps[0]
@@ -39,7 +32,7 @@ func gridFromString(gs string) (g *Grid) {
 		}
 
 		var err error
-		var interval retentionIntervalStub
+		var interval testInterval
 
 		if interval.keepCount, err = strconv.Atoi(numSnapsStr); err != nil {
 			panic(err)
@@ -48,44 +41,38 @@ func gridFromString(gs string) (g *Grid) {
 			panic(err)
 		}
 
-		g.intervals[idx] = &interval
+		intervals[idx] = &interval
 	}
-	return
+	return NewGrid(intervals)
 }
 
-type dummySnap struct {
+type testSnap struct {
 	Name       string
 	ShouldKeep bool
 	date       time.Time
 }
 
-func (ds dummySnap) Date() time.Time {
+func (ds testSnap) Date() time.Time { return ds.date }
-	return ds.date
-}
-
-func (ds dummySnap) LessThan(b Entry) bool {
-	return ds.date.Before(b.(dummySnap).date) // don't have a txg here
-}
 
 func validateRetentionGridFitEntries(t *testing.T, now time.Time, input, keep, remove []Entry) {
 
-	snapDescr := func(d dummySnap) string {
+	snapDescr := func(d testSnap) string {
 		return fmt.Sprintf("%s@%s", d.Name, d.date.Sub(now))
 	}
 
 	t.Logf("keep list:\n")
 	for k := range keep {
-		t.Logf("\t%s\n", snapDescr(keep[k].(dummySnap)))
+		t.Logf("\t%s\n", snapDescr(keep[k].(testSnap)))
 	}
 	t.Logf("remove list:\n")
 	for k := range remove {
-		t.Logf("\t%s\n", snapDescr(remove[k].(dummySnap)))
+		t.Logf("\t%s\n", snapDescr(remove[k].(testSnap)))
 	}
 
 	t.Logf("\n\n")
 
 	for _, s := range input {
-		d := s.(dummySnap)
+		d := s.(testSnap)
 		descr := snapDescr(d)
 		t.Logf("testing %s\n", descr)
 		if d.ShouldKeep {
@@ -97,21 +84,18 @@ func validateRetentionGridFitEntries(t *testing.T, now time.Time, input, keep, r
 
 	t.Logf("resulting list:\n")
 	for k := range keep {
-		t.Logf("\t%s\n", snapDescr(keep[k].(dummySnap)))
+		t.Logf("\t%s\n", snapDescr(keep[k].(testSnap)))
 	}
 }
 
-func TestRetentionGridFitEntriesEmptyInput(t *testing.T) {
+func TestEmptyInput(t *testing.T) {
 	g := gridFromString("10m|10m|10m|1h")
-	keep, remove := g.FitEntries(time.Now(), []Entry{})
+	keep, remove := g.FitEntries([]Entry{})
 	assert.Empty(t, keep)
 	assert.Empty(t, remove)
 }
 
-func TestRetentionGridFitEntriesIntervalBoundariesAndAlignment(t *testing.T) {
+func TestIntervalBoundariesAndAlignment(t *testing.T) {
-
-	// Intervals are (duration], i.e. 10min is in the first interval, not in the second
-
 	g := gridFromString("10m|10m|10m")
 
 	t.Logf("%#v\n", g)
@@ -119,20 +103,51 @@ func TestRetentionGridFitEntriesIntervalBoundariesAndAlignment(t *testing.T) {
 	now := time.Unix(0, 0)
 
 	snaps := []Entry{
-		dummySnap{"0", true, now.Add(1 * time.Minute)},    // before now
+		testSnap{"0", true, now.Add(1 * time.Minute)},    // before now => keep unconditionally
-		dummySnap{"1", true, now},                         // before now
+		testSnap{"1", true, now},                         // 1st interval left edge => inclusive
-		dummySnap{"2", true, now.Add(-10 * time.Minute)},  // 1st interval
+		testSnap{"2", true, now.Add(-10 * time.Minute)},  // 2nd interval left edge => inclusive
-		dummySnap{"3", true, now.Add(-20 * time.Minute)},  // 2nd interval
+		testSnap{"3", true, now.Add(-20 * time.Minute)},  // 3rd interval left edge => inclusuive
-		dummySnap{"4", true, now.Add(-30 * time.Minute)},  // 3rd interval
+		testSnap{"4", false, now.Add(-30 * time.Minute)}, // 3rd interval right edge => excludive
-		dummySnap{"5", false, now.Add(-40 * time.Minute)}, // after last interval
+		testSnap{"5", false, now.Add(-40 * time.Minute)}, // after last interval => remove unconditionally
 	}
 
-	keep, remove := g.FitEntries(now, snaps)
+	keep, remove := g.fitEntriesWithNow(now, snaps)
 	validateRetentionGridFitEntries(t, now, snaps, keep, remove)
-
 }
 
-func TestRetentionGridFitEntries(t *testing.T) {
+func TestKeepsOldestSnapsInABucket(t *testing.T) {
+	g := gridFromString("1m,2")
+
+	relt := func(secs int64) time.Time { return time.Unix(secs, 0) }
+
+	snaps := []Entry{
+		testSnap{"1", true, relt(1)},
+		testSnap{"2", true, relt(2)},
+		testSnap{"3", false, relt(3)},
+		testSnap{"4", false, relt(4)},
+		testSnap{"5", false, relt(5)},
+	}
+
+	now := relt(6)
+	keep, remove := g.FitEntries(snaps)
+	validateRetentionGridFitEntries(t, now, snaps, keep, remove)
+}
+
+func TestRespectsKeepCountAll(t *testing.T) {
+	g := gridFromString("1m,-1|1m,1")
+	relt := func(secs int64) time.Time { return time.Unix(secs, 0) }
+	snaps := []Entry{
+		testSnap{"a", true, relt(0)},
+		testSnap{"b", true, relt(-1)},
+		testSnap{"c", true, relt(-2)},
+		testSnap{"d", false, relt(-60)},
+		testSnap{"e", true, relt(-61)},
+	}
+	keep, remove := g.FitEntries(snaps)
+	validateRetentionGridFitEntries(t, relt(61), snaps, keep, remove)
+}
+
+func TestComplex(t *testing.T) {
 
 	g := gridFromString("10m,-1|10m|10m,2|1h")
 
@@ -141,20 +156,29 @@ func TestRetentionGridFitEntries(t *testing.T) {
 	now := time.Unix(0, 0)
 
 	snaps := []Entry{
-		dummySnap{"1", true, now.Add(3 * time.Minute)},   // pre-now must always be kept
+		// pre-now must always be kept
-		dummySnap{"b1", true, now.Add(-6 * time.Minute)}, // 1st interval allows unlimited entries
+		testSnap{"1", true, now.Add(3 * time.Minute)},
-		dummySnap{"b3", true, now.Add(-8 * time.Minute)}, // 1st interval allows unlimited entries
+		// 1st interval allows unlimited entries
-		dummySnap{"b2", true, now.Add(-9 * time.Minute)}, // 1st interval allows unlimited entries
+		testSnap{"b1", true, now.Add(-6 * time.Minute)},
-		dummySnap{"a", false, now.Add(-11 * time.Minute)},
+		testSnap{"b3", true, now.Add(-8 * time.Minute)},
-		dummySnap{"c", true, now.Add(-19 * time.Minute)}, // 2nd interval allows 1 entry
+		testSnap{"b2", true, now.Add(-9 * time.Minute)},
-		dummySnap{"foo", false, now.Add(-25 * time.Minute)},
+		// 2nd interval allows 1 entry
-		dummySnap{"bar", true, now.Add(-26 * time.Minute)}, // 3rd interval allows 2 entries
+		testSnap{"a", false, now.Add(-11 * time.Minute)},
-		dummySnap{"border", true, now.Add(-30 * time.Minute)},
+		testSnap{"c", true, now.Add(-19 * time.Minute)},
-		dummySnap{"d", true, now.Add(-1*time.Hour - 15*time.Minute)},
+		// 3rd interval allows 2 entries
-		dummySnap{"e", false, now.Add(-1*time.Hour - 31*time.Minute)}, // before earliest interval must always be deleted
+		testSnap{"foo", true, now.Add(-25 * time.Minute)},
-		dummySnap{"f", false, now.Add(-2 * time.Hour)},
+		testSnap{"bar", true, now.Add(-26 * time.Minute)},
+		// this is at the left edge of the 4th interval
+		testSnap{"border", false, now.Add(-30 * time.Minute)},
+		// right in the 4th interval
+		testSnap{"d", true, now.Add(-1*time.Hour - 15*time.Minute)},
+		// on the right edge of 4th interval => not in it => delete
+		testSnap{"q", false, now.Add(-1*time.Hour - 30*time.Minute)},
+		// older then 4th interval => always delete
+		testSnap{"e", false, now.Add(-1*time.Hour - 31*time.Minute)},
+		testSnap{"f", false, now.Add(-2 * time.Hour)},
 	}
-	keep, remove := g.FitEntries(now, snaps)
+	keep, remove := g.fitEntriesWithNow(now, snaps)
 
 	validateRetentionGridFitEntries(t, now, snaps, keep, remove)
 

replication/driver/replication_driver.go

@@ -9,15 +9,17 @@ import (
 	"sync"
 	"time"
 
+	"github.com/go-playground/validator"
+	"github.com/kr/pretty"
 	"github.com/pkg/errors"
-	"github.com/zrepl/zrepl/daemon/logging/trace"
-	"github.com/zrepl/zrepl/zfs"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/status"
 
+	"github.com/zrepl/zrepl/daemon/logging/trace"
+	"github.com/zrepl/zrepl/zfs"
+
 	"github.com/zrepl/zrepl/replication/report"
 	"github.com/zrepl/zrepl/util/chainlock"
-	"github.com/zrepl/zrepl/util/envconst"
 )
 
 type interval struct {
@@ -82,6 +84,7 @@ type Planner interface {
 // an attempt represents a single planning & execution of fs replications
 type attempt struct {
 	planner Planner
+	config  Config
 
 	l *chainlock.L
 
@@ -179,10 +182,25 @@ type step struct {
 type ReportFunc func() *report.Report
 type WaitFunc func(block bool) (done bool)
 
-var maxAttempts = envconst.Int64("ZREPL_REPLICATION_MAX_ATTEMPTS", 3)
+type Config struct {
-var reconnectHardFailTimeout = envconst.Duration("ZREPL_REPLICATION_RECONNECT_HARD_FAIL_TIMEOUT", 10*time.Minute)
+	StepQueueConcurrency     int           `validate:"gte=1"`
+	MaxAttempts              int           `validate:"eq=-1|gt=0"`
+	ReconnectHardFailTimeout time.Duration `validate:"gt=0"`
+}
+
+var validate = validator.New()
+
+func (c Config) Validate() error {
+	return validate.Struct(c)
+}
+
+// caller must ensure config.Validate() == nil
+func Do(ctx context.Context, config Config, planner Planner) (ReportFunc, WaitFunc) {
+
+	if err := config.Validate(); err != nil {
+		panic(err)
+	}
 
-func Do(ctx context.Context, planner Planner) (ReportFunc, WaitFunc) {
 	log := getLog(ctx)
 	l := chainlock.New()
 	run := &run{
@@ -199,7 +217,7 @@ func Do(ctx context.Context, planner Planner) (ReportFunc, WaitFunc) {
 		defer log.Debug("run ended")
 		var prev *attempt
 		mainLog := log
-		for ano := 0; ano < int(maxAttempts) || maxAttempts == 0; ano++ {
+		for ano := 0; ano < int(config.MaxAttempts); ano++ {
 			log := mainLog.WithField("attempt_number", ano)
 			log.Debug("start attempt")
 
@@ -211,6 +229,7 @@ func Do(ctx context.Context, planner Planner) (ReportFunc, WaitFunc) {
 				l:         l,
 				startedAt: time.Now(),
 				planner:   planner,
+				config:    config,
 			}
 			run.attempts = append(run.attempts, cur)
 			run.l.DropWhile(func() {
@@ -228,7 +247,10 @@ func Do(ctx context.Context, planner Planner) (ReportFunc, WaitFunc) {
 			errRep := cur.errorReport()
 
 			if rep.State == report.AttemptDone {
-				log.Debug("attempt completed successfully")
+				if len(rep.Filesystems) == 0 {
+					log.Warn("no filesystems were considered for replication")
+				}
+				log.Debug("attempt completed")
 				break
 			}
 
@@ -236,14 +258,14 @@ func Do(ctx context.Context, planner Planner) (ReportFunc, WaitFunc) {
 			log.WithField("most_recent_err", mostRecentErr).WithField("most_recent_err_class", mostRecentErrClass).Debug("most recent error used for re-connect decision")
 			if mostRecentErr == nil {
 				// inconsistent reporting, let's bail out
-				log.Warn("attempt does not report done but error report does not report errors, aborting run")
+				log.WithField("attempt_state", rep.State).Warn("attempt does not report done but error report does not report errors, aborting run")
 				break
 			}
 			log.WithError(mostRecentErr.Err).Error("most recent error in this attempt")
 			shouldReconnect := mostRecentErrClass == errorClassTemporaryConnectivityRelated
 			log.WithField("reconnect_decision", shouldReconnect).Debug("reconnect decision made")
 			if shouldReconnect {
-				run.waitReconnect.Set(time.Now(), reconnectHardFailTimeout)
+				run.waitReconnect.Set(time.Now(), config.ReconnectHardFailTimeout)
 				log.WithField("deadline", run.waitReconnect.End()).Error("temporary connectivity-related error identified, start waiting for reconnect")
 				var connectErr error
 				var connectErrTime time.Time
@@ -310,6 +332,9 @@ func (a *attempt) doGlobalPlanning(ctx context.Context, prev *attempt) map[*fs]*
 		return nil
 	}
 
+	// a.fss != nil indicates that there was no planning error (see doc comment)
+	a.fss = make([]*fs, 0)
+
 	for _, pfs := range pfss {
 		fs := &fs{
 			fs: pfs,
@@ -413,7 +438,7 @@ func (a *attempt) doFilesystems(ctx context.Context, prevs map[*fs]*fs) {
 	defer a.l.Lock().Unlock()
 
 	stepQueue := newStepQueue()
-	defer stepQueue.Start(envconst.Int("ZREPL_REPLICATION_EXPERIMENTAL_REPLICATION_CONCURRENCY", 1))() // TODO parallel replication
+	defer stepQueue.Start(a.config.StepQueueConcurrency)()
 	var fssesDone sync.WaitGroup
 	for _, f := range a.fss {
 		fssesDone.Add(1)
@@ -484,57 +509,37 @@ func (f *fs) do(ctx context.Context, pq *stepQueue, prev *fs) {
 	// => don't set f.planning.done just yet
 	f.debug("initial len(fs.planned.steps) = %d", len(f.planned.steps))
 
-	// for not-first attempts, only allow fs.planned.steps
+	// for not-first attempts that succeeded in planning, only allow fs.planned.steps
-	// up to including the originally planned target snapshot
+	// up to and including the originally planned target snapshot
 	if prev != nil && prev.planning.done && prev.planning.err == nil {
+		f.debug("attempting to correlate plan with previous attempt to find out what is left to do")
+		// find the highest of the previously uncompleted steps for which we can also find a step
+		// in our current plan
 		prevUncompleted := prev.planned.steps[prev.planned.step:]
-		if len(prevUncompleted) == 0 {
+		var target struct{ prev, cur int }
-			f.debug("prevUncompleted is empty")
+		target.prev = -1
-			return
+		target.cur = -1
-		}
+	out:
-		if len(f.planned.steps) == 0 {
+		for p := len(prevUncompleted) - 1; p >= 0; p-- {
-			f.debug("fs.planned.steps is empty")
+			for q := len(f.planned.steps) - 1; q >= 0; q-- {
-			return
+				if prevUncompleted[p].step.TargetEquals(f.planned.steps[q].step) {
-		}
+					target.prev = p
-		prevFailed := prevUncompleted[0]
+					target.cur = q
-		curFirst := f.planned.steps[0]
+					break out
-		// we assume that PlanFS retries prevFailed (using curFirst)
-		if !prevFailed.step.TargetEquals(curFirst.step) {
-			f.debug("Targets don't match")
-			// Two options:
-			// A: planning algorithm is broken
-			// B: manual user intervention inbetween
-			// Neither way will we make progress, so let's error out
-			stepFmt := func(step *step) string {
-				r := step.report()
-				s := r.Info
-				if r.IsIncremental() {
-					return fmt.Sprintf("%s=>%s", s.From, s.To)
-				} else {
-					return fmt.Sprintf("full=>%s", s.To)
 				}
 			}
-			msg := fmt.Sprintf("last attempt's uncompleted step %s does not correspond to this attempt's first planned step %s",
+		}
-				stepFmt(prevFailed), stepFmt(curFirst))
+		if target.prev == -1 || target.cur == -1 {
-			f.planned.stepErr = newTimedError(errors.New(msg), time.Now())
+			f.debug("no correlation possible between previous attempt and this attempt's plan")
+			f.planning.err = newTimedError(fmt.Errorf("cannot correlate previously failed attempt to current plan"), time.Now())
 			return
 		}
-		// only allow until step targets diverge
+
-		min := len(prevUncompleted)
+		f.planned.steps = f.planned.steps[0:target.cur]
-		if min > len(f.planned.steps) {
+		f.debug("found correlation, new steps are len(fs.planned.steps) = %d", len(f.planned.steps))
-			min = len(f.planned.steps)
+	} else {
-		}
+		f.debug("previous attempt does not exist or did not finish planning, no correlation possible, taking this attempt's plan as is")
-		diverge := 0
-		for ; diverge < min; diverge++ {
-			f.debug("diverge compare iteration %d", diverge)
-			if !f.planned.steps[diverge].step.TargetEquals(prevUncompleted[diverge].step) {
-				break
-			}
-		}
-		f.debug("diverge is %d", diverge)
-		f.planned.steps = f.planned.steps[0:diverge]
 	}
-	f.debug("post-prev-merge len(fs.planned.steps) = %d", len(f.planned.steps))
 
 	// now we are done planning (f.planned.steps won't change from now on)
 	f.planning.done = true
@@ -675,10 +680,12 @@ func (a *attempt) report() *report.AttemptReport {
 		r.Filesystems[i] = a.fss[i].report()
 	}
 
-	state := report.AttemptPlanning
+	var state report.AttemptState
-	if a.planErr != nil {
+	if a.planErr == nil && a.fss == nil {
+		state = report.AttemptPlanning
+	} else if a.planErr != nil && a.fss == nil {
 		state = report.AttemptPlanningError
-	} else if a.fss != nil {
+	} else if a.planErr == nil && a.fss != nil {
 		if a.finishedAt.IsZero() {
 			state = report.AttemptFanOutFSs
 		} else {
@@ -691,6 +698,8 @@ func (a *attempt) report() *report.AttemptReport {
 				state = report.AttemptFanOutError
 			}
 		}
+	} else {
+		panic(fmt.Sprintf("attempt.planErr and attempt.fss must not both be != nil:\n%s\n%s", pretty.Sprint(a.planErr), pretty.Sprint(a.fss)))
 	}
 	r.State = state
 

replication/driver/replication_driver_test.go

@@ -10,6 +10,7 @@ import (
 	"time"
 
 	"github.com/stretchr/testify/require"
+
 	"github.com/zrepl/zrepl/daemon/logging/trace"
 
 	"github.com/zrepl/zrepl/replication/report"
@@ -153,7 +154,12 @@ func TestReplication(t *testing.T) {
 	defer trace.WithTaskFromStackUpdateCtx(&ctx)()
 
 	mp := &mockPlanner{}
-	getReport, wait := Do(ctx, mp)
+	driverConfig := Config{
+		StepQueueConcurrency:     1,
+		MaxAttempts:              1,
+		ReconnectHardFailTimeout: 1 * time.Second,
+	}
+	getReport, wait := Do(ctx, driverConfig, mp)
 	begin := time.Now()
 	fireAt := []time.Duration{
 		// the following values are relative to the start

replication/driver/replication_stepqueue_test.go

@@ -12,6 +12,7 @@ import (
 
 	"github.com/montanaflynn/stats"
 	"github.com/stretchr/testify/assert"
+
 	"github.com/zrepl/zrepl/daemon/logging/trace"
 )
 

replication/logic/diff/diff.go

@@ -77,56 +77,48 @@ func IncrementalPath(receiver, sender []*FilesystemVersion) (incPath []*Filesyst
 	receiver = SortVersionListByCreateTXGThenBookmarkLTSnapshot(receiver)
 	sender = SortVersionListByCreateTXGThenBookmarkLTSnapshot(sender)
 
-	// Find most recent common ancestor by name, preferring snapshots over bookmarks
+	var mrcaCandidate struct {
+		found bool
+		guid  uint64
+		r, s  int
+	}
 
-	mrcaRcv := len(receiver) - 1
+findCandidate:
-	mrcaSnd := len(sender) - 1
+	for r := len(receiver) - 1; r >= 0; r-- {
-
+		for s := len(sender) - 1; s >= 0; s-- {
-	for mrcaRcv >= 0 && mrcaSnd >= 0 {
+			if sender[s].GetGuid() == receiver[r].GetGuid() {
-		if receiver[mrcaRcv].Guid == sender[mrcaSnd].Guid {
+				mrcaCandidate.guid = sender[s].GetGuid()
-			// Since we arrive from the end of the array, and because we defined bookmark < snapshot,
+				mrcaCandidate.s = s
-			// this condition will match snapshot first, which is what we want because it gives us
+				mrcaCandidate.r = r
-			// size estimation
+				mrcaCandidate.found = true
-			break
+				break findCandidate
-		}
+			}
-		receiverCreation, err := receiver[mrcaRcv].CreationAsTime()
-		if err != nil {
-			panic(err) // FIXME move this to a sorting phase before
-		}
-		senderCreation, err := sender[mrcaSnd].CreationAsTime()
-		if err != nil {
-			panic(err) // FIXME move this to the sorting phase before
-		}
-
-		if receiverCreation.Before(senderCreation) {
-			mrcaSnd--
-		} else {
-			mrcaRcv--
 		}
 	}
 
-	if mrcaRcv == -1 || mrcaSnd == -1 {
+	// handle failure cases
+	if !mrcaCandidate.found {
 		return nil, &ConflictNoCommonAncestor{
 			SortedSenderVersions:   sender,
 			SortedReceiverVersions: receiver,
 		}
-	}
+	} else if mrcaCandidate.r != len(receiver)-1 {
-
-	if mrcaRcv != len(receiver)-1 {
 		return nil, &ConflictDiverged{
 			SortedSenderVersions:   sender,
 			SortedReceiverVersions: receiver,
-			CommonAncestor:         sender[mrcaSnd],
+			CommonAncestor:         sender[mrcaCandidate.s],
-			SenderOnly:             sender[mrcaSnd+1:],
+			SenderOnly:             sender[mrcaCandidate.s+1:],
-			ReceiverOnly:           receiver[mrcaRcv+1:],
+			ReceiverOnly:           receiver[mrcaCandidate.r+1:],
 		}
 	}
 
+	// incPath is possible
+
 	// incPath must not contain bookmarks except initial one,
 	incPath = make([]*FilesystemVersion, 0, len(sender))
-	incPath = append(incPath, sender[mrcaSnd])
+	incPath = append(incPath, sender[mrcaCandidate.s])
 	// it's ok if incPath[0] is a bookmark, but not the subsequent ones in the incPath
-	for i := mrcaSnd + 1; i < len(sender); i++ {
+	for i := mrcaCandidate.s + 1; i < len(sender); i++ {
 		if sender[i].Type == FilesystemVersion_Snapshot && incPath[len(incPath)-1].Guid != sender[i].Guid {
 			incPath = append(incPath, sender[i])
 		}

replication/logic/pdu/pdu.proto

@@ -1,5 +1,5 @@
 syntax = "proto3";
-option go_package = "pdu";
+option go_package = ".;pdu";
 
 service Replication {
   rpc Ping(PingReq) returns (PingRes);

replication/logic/pdu/pdu_grpc.pb.go

@@ -0,0 +1,281 @@
+// Code generated by protoc-gen-go-grpc. DO NOT EDIT.
+
+package pdu
+
+import (
+	context "context"
+	grpc "google.golang.org/grpc"
+	codes "google.golang.org/grpc/codes"
+	status "google.golang.org/grpc/status"
+)
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the grpc package it is being compiled against.
+// Requires gRPC-Go v1.32.0 or later.
+const _ = grpc.SupportPackageIsVersion7
+
+// ReplicationClient is the client API for Replication service.
+//
+// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://pkg.go.dev/google.golang.org/grpc/?tab=doc#ClientConn.NewStream.
+type ReplicationClient interface {
+	Ping(ctx context.Context, in *PingReq, opts ...grpc.CallOption) (*PingRes, error)
+	ListFilesystems(ctx context.Context, in *ListFilesystemReq, opts ...grpc.CallOption) (*ListFilesystemRes, error)
+	ListFilesystemVersions(ctx context.Context, in *ListFilesystemVersionsReq, opts ...grpc.CallOption) (*ListFilesystemVersionsRes, error)
+	DestroySnapshots(ctx context.Context, in *DestroySnapshotsReq, opts ...grpc.CallOption) (*DestroySnapshotsRes, error)
+	ReplicationCursor(ctx context.Context, in *ReplicationCursorReq, opts ...grpc.CallOption) (*ReplicationCursorRes, error)
+	SendCompleted(ctx context.Context, in *SendCompletedReq, opts ...grpc.CallOption) (*SendCompletedRes, error)
+}
+
+type replicationClient struct {
+	cc grpc.ClientConnInterface
+}
+
+func NewReplicationClient(cc grpc.ClientConnInterface) ReplicationClient {
+	return &replicationClient{cc}
+}
+
+func (c *replicationClient) Ping(ctx context.Context, in *PingReq, opts ...grpc.CallOption) (*PingRes, error) {
+	out := new(PingRes)
+	err := c.cc.Invoke(ctx, "/Replication/Ping", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *replicationClient) ListFilesystems(ctx context.Context, in *ListFilesystemReq, opts ...grpc.CallOption) (*ListFilesystemRes, error) {
+	out := new(ListFilesystemRes)
+	err := c.cc.Invoke(ctx, "/Replication/ListFilesystems", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *replicationClient) ListFilesystemVersions(ctx context.Context, in *ListFilesystemVersionsReq, opts ...grpc.CallOption) (*ListFilesystemVersionsRes, error) {
+	out := new(ListFilesystemVersionsRes)
+	err := c.cc.Invoke(ctx, "/Replication/ListFilesystemVersions", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *replicationClient) DestroySnapshots(ctx context.Context, in *DestroySnapshotsReq, opts ...grpc.CallOption) (*DestroySnapshotsRes, error) {
+	out := new(DestroySnapshotsRes)
+	err := c.cc.Invoke(ctx, "/Replication/DestroySnapshots", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *replicationClient) ReplicationCursor(ctx context.Context, in *ReplicationCursorReq, opts ...grpc.CallOption) (*ReplicationCursorRes, error) {
+	out := new(ReplicationCursorRes)
+	err := c.cc.Invoke(ctx, "/Replication/ReplicationCursor", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *replicationClient) SendCompleted(ctx context.Context, in *SendCompletedReq, opts ...grpc.CallOption) (*SendCompletedRes, error) {
+	out := new(SendCompletedRes)
+	err := c.cc.Invoke(ctx, "/Replication/SendCompleted", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// ReplicationServer is the server API for Replication service.
+// All implementations must embed UnimplementedReplicationServer
+// for forward compatibility
+type ReplicationServer interface {
+	Ping(context.Context, *PingReq) (*PingRes, error)
+	ListFilesystems(context.Context, *ListFilesystemReq) (*ListFilesystemRes, error)
+	ListFilesystemVersions(context.Context, *ListFilesystemVersionsReq) (*ListFilesystemVersionsRes, error)
+	DestroySnapshots(context.Context, *DestroySnapshotsReq) (*DestroySnapshotsRes, error)
+	ReplicationCursor(context.Context, *ReplicationCursorReq) (*ReplicationCursorRes, error)
+	SendCompleted(context.Context, *SendCompletedReq) (*SendCompletedRes, error)
+	mustEmbedUnimplementedReplicationServer()
+}
+
+// UnimplementedReplicationServer must be embedded to have forward compatible implementations.
+type UnimplementedReplicationServer struct {
+}
+
+func (UnimplementedReplicationServer) Ping(context.Context, *PingReq) (*PingRes, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method Ping not implemented")
+}
+func (UnimplementedReplicationServer) ListFilesystems(context.Context, *ListFilesystemReq) (*ListFilesystemRes, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method ListFilesystems not implemented")
+}
+func (UnimplementedReplicationServer) ListFilesystemVersions(context.Context, *ListFilesystemVersionsReq) (*ListFilesystemVersionsRes, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method ListFilesystemVersions not implemented")
+}
+func (UnimplementedReplicationServer) DestroySnapshots(context.Context, *DestroySnapshotsReq) (*DestroySnapshotsRes, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method DestroySnapshots not implemented")
+}
+func (UnimplementedReplicationServer) ReplicationCursor(context.Context, *ReplicationCursorReq) (*ReplicationCursorRes, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method ReplicationCursor not implemented")
+}
+func (UnimplementedReplicationServer) SendCompleted(context.Context, *SendCompletedReq) (*SendCompletedRes, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method SendCompleted not implemented")
+}
+func (UnimplementedReplicationServer) mustEmbedUnimplementedReplicationServer() {}
+
+// UnsafeReplicationServer may be embedded to opt out of forward compatibility for this service.
+// Use of this interface is not recommended, as added methods to ReplicationServer will
+// result in compilation errors.
+type UnsafeReplicationServer interface {
+	mustEmbedUnimplementedReplicationServer()
+}
+
+func RegisterReplicationServer(s grpc.ServiceRegistrar, srv ReplicationServer) {
+	s.RegisterService(&Replication_ServiceDesc, srv)
+}
+
+func _Replication_Ping_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(PingReq)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(ReplicationServer).Ping(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/Replication/Ping",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(ReplicationServer).Ping(ctx, req.(*PingReq))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _Replication_ListFilesystems_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(ListFilesystemReq)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(ReplicationServer).ListFilesystems(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/Replication/ListFilesystems",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(ReplicationServer).ListFilesystems(ctx, req.(*ListFilesystemReq))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _Replication_ListFilesystemVersions_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(ListFilesystemVersionsReq)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(ReplicationServer).ListFilesystemVersions(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/Replication/ListFilesystemVersions",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(ReplicationServer).ListFilesystemVersions(ctx, req.(*ListFilesystemVersionsReq))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _Replication_DestroySnapshots_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(DestroySnapshotsReq)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(ReplicationServer).DestroySnapshots(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/Replication/DestroySnapshots",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(ReplicationServer).DestroySnapshots(ctx, req.(*DestroySnapshotsReq))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _Replication_ReplicationCursor_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(ReplicationCursorReq)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(ReplicationServer).ReplicationCursor(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/Replication/ReplicationCursor",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(ReplicationServer).ReplicationCursor(ctx, req.(*ReplicationCursorReq))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _Replication_SendCompleted_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(SendCompletedReq)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(ReplicationServer).SendCompleted(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/Replication/SendCompleted",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(ReplicationServer).SendCompleted(ctx, req.(*SendCompletedReq))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+// Replication_ServiceDesc is the grpc.ServiceDesc for Replication service.
+// It's only intended for direct use with grpc.RegisterService,
+// and not to be introspected or modified (even as a copy)
+var Replication_ServiceDesc = grpc.ServiceDesc{
+	ServiceName: "Replication",
+	HandlerType: (*ReplicationServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "Ping",
+			Handler:    _Replication_Ping_Handler,
+		},
+		{
+			MethodName: "ListFilesystems",
+			Handler:    _Replication_ListFilesystems_Handler,
+		},
+		{
+			MethodName: "ListFilesystemVersions",
+			Handler:    _Replication_ListFilesystemVersions_Handler,
+		},
+		{
+			MethodName: "DestroySnapshots",
+			Handler:    _Replication_DestroySnapshots_Handler,
+		},
+		{
+			MethodName: "ReplicationCursor",
+			Handler:    _Replication_ReplicationCursor_Handler,
+		},
+		{
+			MethodName: "SendCompleted",
+			Handler:    _Replication_SendCompleted_Handler,
+		},
+	},
+	Streams:  []grpc.StreamDesc{},
+	Metadata: "pdu.proto",
+}

replication/logic/pdu/pdu_test.go

@@ -10,7 +10,7 @@ import (
 func TestFilesystemVersion_RelName(t *testing.T) {
 
 	type TestCase struct {
-		In    FilesystemVersion
+		In    *FilesystemVersion
 		Out   string
 		Panic bool
 	}
@@ -18,7 +18,7 @@ func TestFilesystemVersion_RelName(t *testing.T) {
 	creat := FilesystemVersionCreation(time.Now())
 	tcs := []TestCase{
 		{
-			In: FilesystemVersion{
+			In: &FilesystemVersion{
 				Type:     FilesystemVersion_Snapshot,
 				Name:     "foobar",
 				Creation: creat,
@@ -26,7 +26,7 @@ func TestFilesystemVersion_RelName(t *testing.T) {
 			Out: "@foobar",
 		},
 		{
-			In: FilesystemVersion{
+			In: &FilesystemVersion{
 				Type:     FilesystemVersion_Bookmark,
 				Name:     "foobar",
 				Creation: creat,
@@ -34,7 +34,7 @@ func TestFilesystemVersion_RelName(t *testing.T) {
 			Out: "#foobar",
 		},
 		{
-			In: FilesystemVersion{
+			In: &FilesystemVersion{
 				Type:     2342,
 				Name:     "foobar",
 				Creation: creat,

replication/logic/replication_logic.go

@@ -9,6 +9,7 @@ import (
 	"time"
 
 	"github.com/prometheus/client_golang/prometheus"
+
 	"github.com/zrepl/zrepl/daemon/logging/trace"
 
 	"github.com/zrepl/zrepl/logger"
@@ -18,7 +19,6 @@ import (
 	"github.com/zrepl/zrepl/replication/report"
 	"github.com/zrepl/zrepl/util/bytecounter"
 	"github.com/zrepl/zrepl/util/chainlock"
-	"github.com/zrepl/zrepl/util/envconst"
 	"github.com/zrepl/zrepl/util/semaphore"
 	"github.com/zrepl/zrepl/zfs"
 )
@@ -116,7 +116,7 @@ func (p *Planner) WaitForConnectivity(ctx context.Context) error {
 type Filesystem struct {
 	sender   Sender
 	receiver Receiver
-	policy   PlannerPolicy
+	policy   PlannerPolicy // immutable, it's .ReplicationConfig member is a pointer and copied into messages
 
 	Path                 string             // compat
 	receiverFS, senderFS *pdu.Filesystem    // receiverFS may be nil, senderFS never nil
@@ -221,7 +221,11 @@ func (s *Step) ReportInfo() *report.StepInfo {
 	}
 }
 
+// caller must ensure policy.Validate() == nil
 func NewPlanner(secsPerState *prometheus.HistogramVec, bytesReplicated *prometheus.CounterVec, sender Sender, receiver Receiver, policy PlannerPolicy) *Planner {
+	if err := policy.Validate(); err != nil {
+		panic(err)
+	}
 	return &Planner{
 		sender:              sender,
 		receiver:            receiver,
@@ -271,7 +275,7 @@ func (p *Planner) doPlanning(ctx context.Context) ([]*Filesystem, error) {
 	}
 	rfss := rlfssres.GetFilesystems()
 
-	sizeEstimateRequestSem := semaphore.New(envconst.Int64("ZREPL_REPLICATION_MAX_CONCURRENT_SIZE_ESTIMATE", 4))
+	sizeEstimateRequestSem := semaphore.New(int64(p.policy.SizeEstimationConcurrency))
 
 	q := make([]*Filesystem, 0, len(sfss))
 	for _, fs := range sfss {
@@ -568,7 +572,7 @@ func (s *Step) buildSendRequest(dryRun bool) (sr *pdu.SendReq) {
 		Encrypted:         s.encrypt.ToPDU(),
 		ResumeToken:       s.resumeToken,
 		DryRun:            dryRun,
-		ReplicationConfig: &s.parent.policy.ReplicationConfig,
+		ReplicationConfig: s.parent.policy.ReplicationConfig,
 	}
 	return sr
 }
@@ -613,7 +617,7 @@ func (s *Step) doReplication(ctx context.Context) error {
 		Filesystem:        fs,
 		To:                sr.GetTo(),
 		ClearResumeToken:  !sres.UsedResumeToken,
-		ReplicationConfig: &s.parent.policy.ReplicationConfig,
+		ReplicationConfig: s.parent.policy.ReplicationConfig,
 	}
 	log.Debug("initiate receive request")
 	_, err = s.receiver.Receive(ctx, rr, byteCountingStream)

replication/logic/replication_logic_policy.go

@@ -1,14 +1,23 @@
 package logic
 
 import (
+	"github.com/go-playground/validator"
 	"github.com/pkg/errors"
+
 	"github.com/zrepl/zrepl/config"
 	"github.com/zrepl/zrepl/replication/logic/pdu"
 )
 
 type PlannerPolicy struct {
-	EncryptedSend     tri // all sends must be encrypted (send -w, and encryption!=off)
+	EncryptedSend             tri // all sends must be encrypted (send -w, and encryption!=off)
-	ReplicationConfig pdu.ReplicationConfig
+	ReplicationConfig         *pdu.ReplicationConfig
+	SizeEstimationConcurrency int `validate:"gte=1"`
+}
+
+var validate = validator.New()
+
+func (p PlannerPolicy) Validate() error {
+	return validate.Struct(p)
 }
 
 func ReplicationConfigFromConfig(in *config.Replication) (*pdu.ReplicationConfig, error) {

replication/replication.go

@@ -8,6 +8,6 @@ import (
 	"github.com/zrepl/zrepl/replication/driver"
 )
 
-func Do(ctx context.Context, planner driver.Planner) (driver.ReportFunc, driver.WaitFunc) {
+func Do(ctx context.Context, driverConfig driver.Config, planner driver.Planner) (driver.ReportFunc, driver.WaitFunc) {
-	return driver.Do(ctx, planner)
+	return driver.Do(ctx, driverConfig, planner)
 }

replication/report/replication_report.go

@@ -162,3 +162,30 @@ func (f *FilesystemReport) NextStep() *StepReport {
 func (f *StepReport) IsIncremental() bool {
 	return f.Info.From != ""
 }
+
+// Returns, for the latest replication attempt,
+// 0  if there have not been any replication attempts,
+// -1 if the replication failed while enumerating file systems
+// N  if N filesystems could not not be replicated successfully
+func (r *Report) GetFailedFilesystemsCountInLatestAttempt() int {
+
+	if len(r.Attempts) == 0 {
+		return 0
+	}
+
+	a := r.Attempts[len(r.Attempts)-1]
+	switch a.State {
+	case AttemptPlanningError:
+		return -1
+	case AttemptFanOutError:
+		var count int
+		for _, f := range a.Filesystems {
+			if f.Error() != nil {
+				count++
+			}
+		}
+		return count
+	default:
+		return 0
+	}
+}

rpc/dataconn/dataconn_client.go

@@ -7,7 +7,7 @@ import (
 	"io"
 	"strings"
 
-	"github.com/golang/protobuf/proto"
+	"google.golang.org/protobuf/proto"
 
 	"github.com/zrepl/zrepl/replication/logic/pdu"
 	"github.com/zrepl/zrepl/rpc/dataconn/stream"
@@ -66,7 +66,7 @@ type ProtocolError struct {
 }
 
 func (e *ProtocolError) Error() string {
-	return fmt.Sprintf("protocol error: %s", e)
+	return fmt.Sprintf("protocol error: %s", e.cause)
 }
 
 func (c *Client) recv(ctx context.Context, conn *stream.Conn, res proto.Message) error {