Put Nextcloud in maintenance mode during backups

roles/docker_services/defaults/main.yml

@@ -60,7 +60,8 @@ services:
 sender_domains:
   - "{{ services.nextcloud.domain }}"
 
-backup_volumes:
+restic_volumes:
+  - "/var/run/docker.sock:/var/run/docker.sock:rw"
   - "{{ services.caddy.volume }}:/mnt/volumes/caddy:ro"
   - "{{ services.postfix.volume }}:/mnt/volumes/postfix:ro"
   - "{{ services.emby.volume }}:/mnt/volumes/emby:ro"

roles/docker_services/tasks/services/restic.yml

@@ -29,10 +29,14 @@
               --keep-daily 7
               --keep-weekly 5
               --keep-monthly 12
+            PRE_COMMANDS: |-
+              docker exec -u www-data nextcloud_app_1 php occ maintenance:mode --on
+            POST_COMMANDS_EXIT: |-
+              docker exec -u www-data nextcloud_app_1 php occ maintenance:mode --off
             B2_ACCOUNT_ID: "{{ secrets.restic.b2.id }}"
             B2_ACCOUNT_KEY: "{{ secrets.restic.b2.key }}"
             TZ: "{{ timezone }}"
-          volumes: "{{ backup_volumes }}"
+          volumes: "{{ restic_volumes }}"
 
         prune:
           image: mazzolino/restic:{{ services.restic.version }}