roles/docker/tasks/main.yml

- name: Apt Information
  become: yes
  apt: name={{ item }} state=present force=yes
  with_items:
    - apt-transport-https=1.0*
    - ca-certificates=20160104*

- name: Docker Apt Key
  become: yes
  apt_key:
    data="{{ lookup('file', 'docker_apt_key.gpg') }}"

- name: Docker repository
  become: yes
  apt_repository:
    repo: "{{ docker_apt_repo | default('deb https://apt.dockerproject.org/repo ubuntu-trusty main') }}"
    update_cache: yes
    state: present

- name: Docker Engine
  become: yes
  apt:
    name: docker-engine=1.12*
    state: present
    force: yes

- name: Docker Exposed via TCP
  become: yes
  lineinfile:
    dest=/etc/default/docker
    state=present
    insertafter='#DOCKER_OPTS'
    line='DOCKER_OPTS="-H unix:///var/run/docker.sock"'
  register: docker_config

- name: Docker Restart
  become: yes
  service:
    name=docker
    state=restarted
  when: docker_config.changed

- name: Enable Docker for User
  become: yes
  user:
    name={{ ansible_user }}
    group=docker
    append=yes

- name: Docker Compose
  become: yes
  get_url:
    url: https://github.com/docker/compose/releases/download/1.7.1/docker-compose-Linux-x86_64
    checksum: "sha256:3166bb74bc648e68c3154bc704fddf6bccf59f03a0c90fc48aefac034535e4ae"
    dest: /usr/local/bin/docker-compose
    owner: root
    group: root
    mode: "0755"