ansible-roles/docker/tasks/pkgs.yml

---
- block:
    - name: Add the Docker repository key
      apt_key: keyserver={{ docker_repo_keyserver }} id=docker_repo_key state=present

    - name: Add the Docker repository
      apt_repository: repo='{{ docker_repo }}' update_cache=yes

    - name: Install Docker
      apt: pkg={{ item }} state={{ docker_pkg_status }} update_cache=yes cache_valid_time=3600
      with_items: '{{ docker_packages }}'

    - name: Ensure that the service is started and enabled
      service: name=docker state=started enabled=yes

  when: docker_install 
  tags: docker 

- block:
    - name: Ensure that the service is stopped and disabled
      service: name=docker state=stopped enabled=no

    - name: Remove the Docker package
      apt: pkg={{ item }} state=absent
      with_items: '{{ docker_packages }}'

    - name: Remove the Docker repository key
      apt_key: keyserver={{ docker_repo_keyserver }} id=docker_repo_key state=absent

    - name: Remove the Docker repository
      apt_repository: repo='{{ docker_repo }}' state=absent update_cache=yes

  when: not docker_install 
  tags: docker