Add cleanup docker cron tasks

main.yml

@@ -12,9 +12,9 @@
 
 - hosts: docker_cluster
   roles:
-    - node_explorer
+#    - node_explorer
 #    - ssh
-#    - docker-cluster
+    - docker-cluster
 #    - ubuntu
 #
 #- hosts: raspberry

roles/docker-cluster/tasks/docker-cron.yml

@@ -0,0 +1,17 @@
+- name: Clean docker system
+  become: yes
+  ansible.builtin.cron:
+    user: root
+    name: "clean docker system"
+    minute: "0"
+    hour: "3"
+    job: "/usr/bin/docker system prune -f"
+
+- name: Clean docker image cache
+  become: yes
+  ansible.builtin.cron:
+    user: root
+    name: "clean docker system"
+    minute: "0"
+    hour: "3"
+    job: "/usr/bin/docker image prune -a -f"

roles/docker-cluster/tasks/main.yml

@@ -13,4 +13,6 @@
 
 - import_tasks: docker-watcher.yml
 
-- import_tasks: ssh-external.yml
+- import_tasks: ssh-external.yml
+
+- import_tasks: docker-cron.yml