Implement config parser.

2017-04-26 18:36:01 +02:00
parent 40f3b530e1
commit 00231ecb73
4 changed files with 305 additions and 0 deletions
@@ -0,0 +1,71 @@
+pools:
+  - name: offsite_backups
+    url: ssh://db2@backups1/db2/
+  - name:
+  - name: local_mirror
+    url: local://mirrorpool/mirrors/tank
+
+pushs:
+  - to: offsite_backups
+    datasets:
+      - tank/var/db
+      - tank/usr/home
+
+  - to: local_mirror
+    datasets:
+      - tank
+
+pulls:
+  - from: offsite
+    mapping: {
+      # like in sinks
+    }
+
+sinks:
+
+  # direct mapping
+  #       1:1 mapping of remote dataset to local dataset
+  #       We will reject a push request which contains > 0 datasets that do not
+  #         match a mapping
+  - from: db1
+    mapping: {
+      "ssdpool/var/db/postgresql9.6":"zroot/backups/db1/pg_data"
+    }
+
+  # "|" non-recursive wildcard
+  #       the remote must present excatly one dataset, mapped to the rhs
+  - from: cdn_master
+    mapping: {
+      "|":"tank/srv/cdn" # NOTE: | is currently an invalid character for a ZFS dataset
+    }
+
+  # "*" recursive wildcard
+  #       the remote may present an arbitrary set of marks a recursive wildcard, i.e. map all remotes to a tree under rhs
+  - from: mirror1
+    mapping: {
+      "tank/foo/bar*":"zroot/backups/mirror1" # NOTE: * is currently an invalid character for a ZFS dataset
+    }
+
+  # "*":"!..." acceptor script
+  #       shell out to an accceptor that receives the remote's offered datasets
+  #       on stdin and, foreach line of this input, returns the corresponding
+  #       local dataset (same order) or '!<space>optional reason' on stdout
+  #       If the acceptor scripts exits with non-zero status code, the remote's
+  #       request will be rejected
+  - from: complex_host
+    mapping: { #
+      "*":"!/path/to/acceptor" # we could just wire the path to the acceptor directly to the mapping
+                               # but let's stick with the same type for the mapping field for now'
+                               # NOTE: * and ! are currently invalid characters for a ZFS dataset
+    }
+
+  # Mixing the rules
+  #   Mixing should be possible if there is a defined precedence (direct before *)
+  #   and non-recursive wildcards are not allowed in multi-entry mapping objects
+  - from: special_snowflake
+    mapping: { # an explicit mapping mixed with a recursive wildcard
+      "sun/usr/home": backups/special_snowflake/homedirs,
+      "sun/var/db":   backups/special_snowflake/database,
+      "*":            backups/special_snowflake/remainingbackup
+      # NOTE:         ^ alignment, should be possible, looks nicer
+    }