Add docker Ansible role

ansible/roles/docker/tasks/docker-install.yml

@@ -0,0 +1,27 @@
+---
+- name: Remove any previous versions of Docker
+  package:
+    name:
+      - docker
+      - docker-engine
+    state: absent
+    
+- name: Add Docker gpg key to apt
+  apt_key:
+    url: https://download.docker.com/linux/ubuntu/gpg
+    id: 9DC858229FC7DD38854AE2D88D81803C0EBFCD88
+    state: present
+  register: add_repository_key
+  
+- name: Add Docker repository to apt
+  apt_repository:
+    repo: "deb [arch=amd64] https://download.docker.com/linux/ubuntu {{ ansible_distribution_release }} stable"
+    state: present
+    update_cache: true
+    
+- name: Install Docker
+  package:
+    name: docker-ce
+    state: present
+  notify: restart docker
+

ansible/roles/docker/tasks/main.yml

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+---
+- import_tasks: docker-install.yml
+- import_tasks: users.yml
+

ansible/roles/docker/tasks/users.yml

@@ -0,0 +1,8 @@
+---
+- name: Add users to Docker group
+  user:
+    name: "{{ item }}"
+    groups: docker
+    append: true
+  with_items: "{{ docker_users }}"
+