Install watchtower

Also move file masks to config so they're consistent

ansible/roles/docker/files/watchtower/docker-compose.yml

@@ -0,0 +1,7 @@
+version: "3"
+services:
+  watchtower:
+    image: containrrr/watchtower:latest
+    volumes:
+      - /var/run/docker.sock:/var/run/docker.sock
+    command: --cleanup --schedule "0 23 * * *"

ansible/roles/docker/tasks/main.yml

@@ -6,3 +6,6 @@
 
 - name: Install netdata
   include: netdata.yml
+
+- name: Install watchtower
+  include: watchtower.yml

ansible/roles/docker/tasks/netdata.yml

@@ -3,7 +3,7 @@
     path: '/opt/netdata'
     state: directory
     owner: "{{ docker_user.name }}"
-    mode: 0755
+    mode: "{{ docker_compose_directory_mask }}"
   become: true
   become_user: root
 
@@ -11,15 +11,13 @@
   template:
     src: files/netdata/docker-compose.yml
     dest: "/opt/netdata/docker-compose.yml"
-    mode: 0644
+    mode: "{{ docker_compose_file_mask }}"
     owner: "{{ docker_user.name }}"
-    backup: true
-    trim_blocks: false
   register: compose_file
   become: true
   become_user: root
 
-- name: Cycle container
+- name: Cycle netdata container
   docker_compose:
     project_src: /opt/netdata
     pull: true

ansible/roles/docker/tasks/watchtower.yml

@@ -0,0 +1,30 @@
+- name: Create watchtower directory
+  file:
+    path: '/opt/watchtower'
+    state: directory
+    owner: "{{ docker_user.name }}"
+    mode: "{{ docker_compose_directory_mask }}"
+  become: true
+  become_user: root
+
+- name: Install watchtower config
+  template:
+    src: files/watchtower/docker-compose.yml
+    dest: "/opt/watchtower/docker-compose.yml"
+    mode: "{{ docker_compose_file_mask }}"
+    owner: "{{ docker_user.name }}"
+  register: compose_file
+  become: true
+  become_user: root
+
+- name: Cycle watchtower container
+  docker_compose:
+    project_src: /opt/watchtower
+    pull: true
+    remove_orphans: true
+    remove_volumes: true
+    state: "{{ item }}"
+  when: compose_file.changed
+  loop:
+    - absent
+    - present

ansible/roles/docker/vars/docker.yml

@@ -1,3 +1,6 @@
 docker_user:
   id: 3000
   name: dockeruser
+
+docker_compose_file_mask: 0664
+docker_compose_directory_mask: 0775