Break out docker installation to its own role

roles/docker/tasks/main.yaml

@@ -0,0 +1,20 @@
+---
+
+- name: install docker
+  apt:
+    force_apt_get: yes
+    name: "{{ packages }}"
+  vars:
+    packages:
+      - docker.io
+      - docker-compose
+
+- name: Add users to docker group
+  user:
+    name: "{{ item }}"
+    groups: docker
+    append: yes
+  with_items:
+    - ubuntu
+
+

roles/nextcloud/tasks/main.yaml

@@ -10,14 +10,12 @@
     - data
     - nginx/conf.d
 
-- name: install docker
+- name: install dependencies
   apt:
     force_apt_get: yes
     name: "{{ packages }}"
   vars:
     packages:
-      - docker.io
-      - docker-compose
       - openssl
 
 - name: Add users to docker group

site.yaml

@@ -11,5 +11,6 @@
 - name: setup nextcloud instance
   hosts: nextcloud
   roles:
+  - { role: docker, become: yes }
   - { role: nextcloud, become: yes }