Merge pull request 'aggiunta cron job che fa il prune di volumi giornalmente' (!3) from marco.procaccini/ansible-role-docker:master into master

Reviewed-on: #3

defaults/main.yml

@@ -62,3 +62,4 @@ docker_node_labels: []
 #  - { key: 'key_name', value: 'label_value' }
 
 docker_restart_daemon_cronjob: false
+docker_prune_dangling_volumes: false

files/docker-prune-dangling-images.sh

@@ -1,5 +1,5 @@
 #!/usr/bin/env bash
 
 # "system" prune, because pruning images only leaves a lot of garbage around
-docker system prune --force > /var/log/docker-prune.log 2>&1
+docker volume prune --force > /var/log/docker-volume-prune.log 2>&1
 exit 0

files/docker-prune-dangling-volumes.sh

@@ -0,0 +1,5 @@
+#!/usr/bin/env bash
+
+# "system" prune, because pruning images only leaves a lot of garbage around
+docker system prune --force > /var/log/docker-prune.log 2>&1
+exit 0

tasks/docker_setup.yml

@@ -106,6 +106,41 @@
   when: docker_install
   tags: [docker, docker_restart_daemon_cronjob]
 
+- name: Cron job that prunes the dangling volumes
+  block:
+    - name: Install a script that prunes the docker dangling volumes
+      copy:
+        src: docker-prune-dangling-volumes.sh
+        dest: /usr/local/sbin/docker-prune-dangling-volumes
+        owner: root
+        group: root
+        mode: 0744
+
+    - name: Install a cron job that prunes the docker volumes
+      cron:
+        name: Prune docker volumes
+        cron_file: docker-prune-volumes
+        special_time: daily
+        user: root
+        state: present
+        job: "/usr/local/sbin/docker-prune-dangling-volumes"
+      when: docker_prune_dangling_volumes
+
+    - name: Disable the cron job that prunes the docker volumes
+      cron:
+        name: Prune docker volumes
+        cron_file: docker-prune-volumes
+        special_time: daily
+        user: root
+        state: absent
+        job: "/usr/local/sbin/docker-prune-dangling-volumes"
+      when: not docker_prune_dangling_volumes
+
+  when: docker_install
+  tags: [docker, docker_prune_volumes]
+
+
+
 - block:
     - name: Remove the docker user
       user: name=docker state=absent