---
- name: Docker installation for Ubuntu distribution
  block:

  - name: Ensure docker packages are not present
    apt:
      state: absent
      name: ['docker', 'docker-engine', 'docker.io']

  - name: Install docker package dependencies
    apt:
      state: latest
      name: ['apt-transport-https', 'ca-certificates', 'curl', 'software-properties-common']
      update_cache: yes
      cache_valid_time: 86400
    register: result
    retries: 3
    until: result is success

  - name: Adding Docker official gpg key
    apt_key:
      url: "{{ docker_apt_key }}"
      state: present

  - name: Setting Docker repository depending on arch
    set_fact:
      docker_repository: "deb [arch={{ item.apt_arch }}] {{ docker_apt_repository }} {{ ansible_distribution_release }} {{ docker_apt_channel }}"
    when: ansible_architecture == item.system_arch
    with_items:
      - { system_arch: 'x86_64', apt_arch: 'amd64' }
      - { system_arch: 'arm', apt_arch: 'armhf' }

  - name: Printing Docker repository
    debug:
      var: docker_repository

  - name: Adding Docker repository
    apt_repository:
      repo: "{{ docker_repository }}"
      state: present
      filename: 'docker'

  - name: Explicitly create docker0
    shell: |
      ip link add name docker0 type bridge || true
      ip addr add dev docker0 172.17.0.1/16 || true
    changed_when: no

  - name: Install docker-ce
    apt:
      name: docker-ce={{ docker_version }}
      update_cache: yes
    register: result
    retries: 3
    until: result is success

  - name: Pin docker-ce release
    copy:
      dest: /etc/apt/preferences.d/docker-ce
      content: |
        Package: docker-ce
        Pin: version {{ docker_version }}
        Pin-Priority: 1002

  - name: Fixing systemd unit for Docker config file
    template:
      src: docker.service.j2
      dest: /lib/systemd/system/docker.service
    notify: reload systemd

  - name: Create docker config directory
    file:
      path: /etc/docker
      mode: 0700
      recurse: yes

  - name: Templating /etc/docker/daemon.json
    template:
      src: daemon.json.j2
      dest: /etc/docker/daemon.json
    notify: restart docker

  - name: Flushing handlers 2
    meta: flush_handlers

  - name: Getting Docker version
    shell: "docker --version"
    register: docker_version
    changed_when: no

  - name: Printing Docker version
    debug: var=docker_version

  when: ansible_distribution == "Ubuntu"