Add cron job to prune unused Docker data

provision.sh

@@ -7,6 +7,7 @@ usage() {
     printf '$ %s\n' "$0 [-h|--help]"
     printf '$ %s\n' "$0 [--dry] os"
     printf '$ %s\n' "$0 [--dry] docker"
+    printf '$ %s\n' "$0 [--dry] docker_config"
     printf '$ %s\n' "$0 [--dry] firewall"
     printf '$ %s\n' "$0 [--dry] ssh"
     printf '$ %s\n' "$0 [--dry] users [-i|--init]"
@@ -38,7 +39,7 @@ fi
 case $TAG in
     "")
         install_modules; $EXEC "$BASE_CMD" ;;
-    os|docker|firewall|ssh)
+    os|docker|docker_config|firewall|ssh)
         install_modules; $EXEC "$BASE_CMD --tags '$TAG'" ;;
     users)
         install_modules

roles/docker_services/tasks/config.yml

@@ -17,3 +17,12 @@
     - docker.socket
     - docker.service
   when: stop is undefined or not stop
+
+- name: Configure cron job to prune unused Docker data weekly
+  ansible.builtin.cron:
+    name: Prune unused Docker data
+    cron_file: ansible_docker_prune
+    job: 'docker system prune -fa && docker volume prune -fa'
+    special_time: weekly
+    user: root
+    state: present

roles/docker_services/tasks/main.yml

@@ -40,6 +40,7 @@
 - name: Configure Docker
   ansible.builtin.import_tasks: config.yml
   tags:
+    - docker_config
     - reboot
 
 - name: Set up Docker services