---
- name: Ensure old versions of Docker are not installed.
  package:
    name:
      - docker
      - docker-common
      - docker-engine
    state: absent

- name: Add Docker GPG key.
  rpm_key:
    key: "{{ docker_yum_gpg_key }}"
    state: present

- name: Add Docker repository.
  get_url:
    url: "{{ docker_yum_repo_url }}"
    dest: '/etc/yum.repos.d/docker-{{ docker_edition }}.repo'
    owner: root
    group: root
    mode: 0644

- name: Ensure Docker Users are in Docker Group
  user:
    name: "{{ item }}"
    groups: docker
    append: true
  with_items: "{{ docker_users }}"

- name: Install Docker.
  package:
    name: "{{ docker_package }}"
    state: "{{ docker_package_state }}"
  notify: restart docker

- name: Ensure /etc/docker/ directory exists.
  file:
    path: /etc/docker
    state: directory
    mode: 0755

- name: Ensure Docker is started and enabled at boot.
  service:
    name: docker
    state: "{{ docker_service_state }}"
    enabled: "{{ docker_service_enabled }}"
  ignore_errors: "{{ ansible_check_mode }}"