snapshot: add cron for btrbk

group_vars/all.yml

@@ -168,8 +168,11 @@ snapper:
 # NOTE: some caveats to reduce config complexity
 # - use the same targets for all subvolumes in each volume definition
 # - use the same global retention policy for snapshot/backup/archive
-# - there's only 1 global ssh config
+# - there's only 1 global ssh config, 1 global crontab
 btrbk:
+  cron:
+    hourly: snapshot
+    daily: resume
   options:
     lockfile: /var/lock/btrbk.lock
     logfile: /var/log/btrbk.log

roles/snapshot/tasks/btrbk.yml

@@ -13,3 +13,14 @@
     group: root
   notify:
     - Create snapshots btrfs subvolumes manually
+
+- name: btrbk | Create btrbk crontabs
+  copy:
+    content: |
+      #!/bin/sh
+      TZ=UTC exec /usr/bin/btrbk -q {{ item.value }}
+    dest: /etc/periodic/{{ item.key }}/btrbk
+    mode: '755'
+    owner: root
+    group: root
+  loop: '{{ btrbk.cron | dict2items }}'