alternative prototype for new config format

cmd/sampleconf/localbackup/host1.yml

@@ -1,36 +1,25 @@
-# mirror local pool to backup pool
+mirror_local:
-local:
 
-  global:
+  type: local
-    snapshot_prefix: zrepl_
 
-  schedule:
+  # snapshot the filesystems matched by the left-hand-side of the mapping
-    type: auto # infer schedule from autosnap step
+  # every 10m with zrepl_ as prefix
-
-  steps:
-
-    - type: autosnap
-      interval: 10m
-      dataset_filter: {
-        "zroot<": ok
-      }
-
-    - type: pull
   mapping: {
-        "zroot<":"backups/local/zroot"
+    "zroot/var/db<":    "storage/backups/local/zroot/var/db",
+    "zroot/usr/home<":  "storage/backups/local/zroot/usr/home",
   }
+  snapshot_prefix: zrepl_
+  interval: 10m
 
-    - type: prune
+  # keep one hour of 10m interval snapshots of filesystems matched by
+  # the left-hand-side of the mapping
+  prune_lhs:
     policy: grid
     grid: 1x1h(keep=all)
-      dataset_filter: {
-        "zroot<": ok
-      }
 
-    - type: prune
+  # follow a grandfathering scheme for filesystems on the right-hand-side of the mapping
+  prune_rhs:
     policy: grid
     grid: 1x1h(keep=all) | 24x1h | 35x1d | 6x30d
-      dataset_filter: {
+
-        "backups/local/zroot<": ok
-      }
 

cmd/sampleconf/pullbackup/backuphost.yml

@@ -1,34 +1,21 @@
-prod1.example.com:
+fullbackup_prod1:
 
+  # connect to remote using ssh / stdinserver command
+  type: pull
   connect:
-    type: ssh
+    type: ssh+stdinserver
-    host: backuphost.example.com
+    host: prod1.example.com
     user: root
     port: 22
     identity_file: /root/.ssh/id_ed25519
 
-  schedule:
+  # pull all offered filesystems to storage/backups/zrepl/pull/prod1.example.com
-    # we cannot infer a schedule from steps below, thus define one here
-    type: cron
-    cron: "@every 10m" # see https://godoc.org/github.com/robfig/cron
-
-  steps:
-
-    # pull datasets from remote to local
-    - type: pull
   mapping: {
-        "zroot<":"storage/backups/zrepl/prod1.example.com/zroot"
+    "<":"storage/backups/zrepl/pull/prod1.example.com"
-        "zroot/tmp": "!"
   }
 
-    # prune the snaphots we pulled
+  # follow a grandfathering scheme for filesystems on the right-hand-side of the mapping
-    - type: prune
+  prune:
     policy: grid
     grid: 1x1h(keep=all) | 24x1h | 35x1d | 6x30d
-      dataset_filter: {
-        "storage/backups/zrepl/prod1.example.com/zroot<": ok
-      }
-      snapshot_filter: {
-        snapshot_prefix: zrepl_
-      }
 

cmd/sampleconf/pullbackup/productionhost.yml

@@ -1,33 +1,22 @@
-backuphost.example.com:
+fullbackup_prod1:
 
-  global:
+  # expect remote to connect via ssh+stdinserver with fullbackup_prod1 as client_identity
-    snapshot_prefix: zrepl_
+  type: pull-source
-
-  # accept connections from backups.example.com via ssh / stdinserver command
   serve:
-    auth: ssh
+    type: stdinserver
-    role: source
+    client_identity: fullbackup_prod1
-    acl: {
+
-      "zroot<": ok,
+  # snapshot these filesystems every 10m with zrepl_ as prefix
+  datasets: {
+    "zroot/var/db<": ok,
     "zroot/usr/home<": omit,
   }
-
+  snapshot_prefix: zrepl_
-  # periodic task list, following given schedule
-  schedule:
-    type: auto  # infer from autosnap step
-  steps:
-
-    - type: autosnap
   interval: 10m
-      dataset_filter: {
-        "zroot<": ok
-      }
 
-    - type: prune
+  # keep a one day window 10m interval snapshots in case pull doesn't work (link down, etc)
+  # (we cannot keep more than one day because this host will run out of disk space)
+  prune:
     policy: grid
-      grid: 1x1h(keep=all)
+    grid: 1x1d(keep=all)
-      dataset_filter: {
-        "zroot<": ok
-      }
-
 

cmd/sampleconf/pushbackup/backuphost.yml

@@ -1,11 +1,19 @@
-prod1.example.com:
+fullbackup_prod1:
 
-  global:
+  # expect remote to connect via ssh+stdinserver with fullbackup_prod1 as client_identity
-    snapshot_prefix: zrepl_
+  type: push-sink
-
-  # accept connections from prod1.example.com via ssh / stdinserver command
   serve:
-    auth: ssh
+    type: stdinserver
-    role: sink
+    client_identity: fullbackup_prod1
-    root: storage/backups/zrepl/sink/prod1.example.com
+
+  # map all pushed datasets to storage/backups/zrepl/sink/prod1.example.com
+  mapping: {
+    "<":"storage/backups/zrepl/sink/prod1.example.com"
+  }
+
+  # follow a grandfathering scheme for filesystems on the right-hand-side of the mapping
+  prune:
+    policy: grid
+    grid: 1x1h(keep=all) | 24x1h | 35x1d | 6x30d
+
 

cmd/sampleconf/pushbackup/productionhost.yml

@@ -1,47 +1,25 @@
-# push backup to backups.example.com
+fullbackup_prod1:
-backups.example.com:
 
+  # connect to remote using ssh / stdinserver command
+  type: push
   connect:
-    type: ssh
+      type: ssh+stdinserver
-    host: 192.168.122.128
+      host: prod1.example.com
       user: root
       port: 22
       identity_file: /root/.ssh/id_ed25519
-    connlog_read_file: /tmp/connlog_read
-    connlog_write_file: /tmp/connlog_write
 
-  global:
+  # snapshot these datsets every 10m with zrepl_ as prefix
-    snapshot_prefix: zrepl_
+  datasets: {
-
-  schedule:
-    type: auto
-
-  steps:
-
-    # take local snapshots & keep window of one day
-    - type: autosnap
-      interval: 10m
-      dataset_filter: {
     "zroot/var/db<": ok,
     "zroot/usr/home<": ok,
   }
-    - type: prune
+  snapshot_prefix: zrepl_
+  interval: 10m
+
+  # keep a one day window 10m interval snapshots in case push doesn't work (link down, etc)
+  # (we cannot keep more than one day because this host will run out of disk space)
+  prune:
     policy: grid
     grid: 1x1d(keep=all)
-      dataset_filter: {
-        "zroot/var/db<":  ok,
-        "zroot/usr/home<": ok,
-      }
-
-    # push datasets to remote and prune there
-    # if these jobs fail, we have one day until we are out of sync
-    - type: push
-      dataset_filter: {
-        "zroot/var/db<":   ok,
-        "zroot/usr/home<": ok,
-      }
-    - type: prune
-      remote: true
-      policy: grid
-      grid: 1x1h(keep=all) | 24x1h | 35x1d | 6x30d