Refactor to reduce config in group_vars

roles/apps/btrbk.yml

@@ -0,0 +1,124 @@
+services:
+  - btrbk.timer
+
+configs:
+  - path: /etc/btrbk/btrbk.conf
+    template: |
+      #
+      # Example btrbk configuration file
+      #
+      #
+      # Please refer to the btrbk.conf(5) man-page for a complete
+      # description of all configuration options.
+      # For more examples, see README.md included with this package.
+      #
+      #   btrbk.conf(5): <https://digint.ch/btrbk/doc/btrbk.conf.5.html>
+      #   README.md:     <https://digint.ch/btrbk/doc/readme.html>
+      #
+      # Note that the options can be overridden per volume/subvolume/target
+      # in the corresponding sections.
+      #
+
+
+      # Enable transaction log
+      transaction_log            /var/log/btrbk.log
+
+      # Specify SSH private key for remote connections
+      ssh_identity               {{ btrbk_ssh_identity | default('/root/.ssh/id_ed25519') }}
+      ssh_user                   {{ btrbk_ssh_user | default('root') }}
+
+      # Use sudo if btrbk or lsbtr is run by regular user
+      backend_local_user         btrfs-progs-sudo
+
+      # Enable stream buffer. Adding a buffer between the sending and
+      # receiving side is generally a good idea.
+      # NOTE: If enabled, make sure to install the "mbuffer" package!
+      stream_buffer              256m
+
+      # Directory in which the btrfs snapshots are created. Relative to
+      # <volume-directory> of the volume section.
+      # If not set, the snapshots are created in <volume-directory>.
+      #
+      # If you want to set a custom name for the snapshot (and backups),
+      # use the "snapshot_name" option within the subvolume section.
+      #
+      # NOTE: btrbk does not autmatically create this directory, and the
+      # snapshot creation will fail if it is not present.
+      #
+      snapshot_dir               .snapshots
+
+      # Always create snapshots. Set this to "ondemand" to only create
+      # snapshots if the target volume is reachable. Set this to "no" if
+      # snapshot creation is done by another instance of btrbk.
+      snapshot_create            onchange
+
+      # Perform incremental backups (set to "strict" if you want to prevent
+      # creation of non-incremental backups if no parent is found).
+      #incremental                yes
+
+      # Specify after what time (in full hours after midnight) backups/
+      # snapshots are considered as a daily backup/snapshot
+      #preserve_hour_of_day       0
+
+      # Specify on which day of week weekly/monthly backups are to be
+      # preserved.
+      #preserve_day_of_week       sunday
+
+      # Preserve all snapshots for a minimum period of time.
+      #snapshot_preserve_min      1d
+
+      # Retention policy for the source snapshots.
+      #snapshot_preserve          <NN>h <NN>d <NN>w <NN>m <NN>y
+
+      # Preserve all backup targets for a minimum period of time.
+      #target_preserve_min        no
+
+      # Retention policy for backup targets:
+      #target_preserve            <NN>h <NN>d <NN>w <NN>m <NN>y
+
+      # Retention policy for archives ("btrbk archive" command):
+      #archive_preserve_min       no
+      #archive_preserve           <NN>h <NN>d <NN>w <NN>m <NN>y
+
+      # Enable compression for remote btrfs send/receive operations:
+      #stream_compress            no
+      #stream_compress_level      default
+      #stream_compress_threads    default
+
+      # Enable lock file support: Ensures that only one instance of btrbk
+      # can be run at a time.
+      lockfile                   /var/lock/btrbk.lock
+
+      # Don't wait for transaction commit on deletion. Set this to "after"
+      # or "each" to make sure the deletion of subvolumes is committed to
+      # disk when btrbk terminates.
+      #btrfs_commit_delete        no
+
+
+      #
+      # Volume section (optional): "volume <volume-directory>"
+      #
+      #   <volume-directory>  Base path within a btrfs filesystem
+      #                       containing the subvolumes to be backuped
+      #                       (usually the mount-point of a btrfs filesystem
+      #                       mounted with subvolid=5 option).
+      #
+      # Subvolume section: "subvolume <subvolume-name>"
+      #
+      #   <subvolume-name>    Subvolume to be backuped, relative to
+      #                       <volume-directory> in volume section.
+      #
+      # Target section: "target <type> <volume-directory>"
+      #
+      #   <type>              (optional) type, defaults to "send-receive".
+      #   <volume-directory>  Directory within a btrfs filesystem
+      #                       receiving the backups.
+      #
+      # NOTE: The parser does not care about indentation, this is only for
+      # human readability. All options apply to the last section
+      # encountered, overriding the corresponding option of the upper
+      # section. This means that the global options must be set on top,
+      # before any "volume", "subvolume" or "target section.
+      #
+
+      {{ btrbk_config }}