docker-compose/tasks/main.yml

---

# Install docker-compose

- name: Ensure pip to be available
  apt:
    name: python-pip
    cache_valid_time: 86400

- name: Install or update docker-compose
  pip:
    name: docker-compose
    executable: pip
    state: latest
  register: docker_compose

# Configure docker-compose

- name: Create configuration directory
  file:
    dest: /etc/docker-compose
    state: directory
    mode: 0700

- name: Write docker-compose.yml
  template:
    dest: /etc/docker-compose/docker-compose.yml
    src: templates/docker-compose.yml
    mode: 0600
  register: compose_file

- name: Validate configuration
  command: docker-compose config -q
  args:
    chdir: /etc/docker-compose
  when: compose_file.changed

# Install and start services

- name: '[Migration] Check multi-user.target dependency of service'
  command: grep -Fxq 'WantedBy=multi-user.target' /etc/systemd/system/docker-compose.service
  register: docker_compose_olddep
  check_mode: no
  ignore_errors: yes
  changed_when: no

- name: '[Migration] Disable service still WantedBy=multi-user.target'
  systemd:
    name: docker-compose.service
    enabled: no
  when: docker_compose_olddep.rc == 0

- name: Install docker-compose.service
  copy:
    dest: /etc/systemd/system/docker-compose.service
    content: |
      [Unit]
      Description=Docker Compose container starter
      After=docker.service network-online.target
      Requires=docker.service network-online.target

      [Service]
      WorkingDirectory=/etc/docker-compose
      Type=oneshot
      RemainAfterExit=yes

      ExecStartPre=/usr/local/bin/docker-compose pull --quiet --ignore-pull-failures
      ExecStart=/usr/local/bin/docker-compose up -d --remove-orphans

      ExecStop=/usr/local/bin/docker-compose down

      ExecReload=/usr/local/bin/docker-compose pull --quiet --ignore-pull-failures
      ExecReload=/usr/local/bin/docker-compose up -d --remove-orphans

      [Install]
      WantedBy=docker.service
  register: docker_compose_service

- name: Enable docker-compose service
  systemd:
    name: docker-compose.service
    daemon_reload: yes
    enabled: yes

- name: Restart service if service configuration changed
  systemd:
    name: docker-compose.service
    daemon_reload: yes
    state: restarted
  when: docker_compose_service.changed and packer_build_name is not defined

- name: Reload and apply configuration
  systemd:
    name: docker-compose.service
    state: reloaded
  when: (docker_compose.changed or compose_file.changed) and packer_build_name is not defined

- name: Install docker-compose-reload.service
  copy:
    dest: /etc/systemd/system/docker-compose-reload.service
    content: |
      [Unit]
      Description=Refresh images and update containers

      [Service]
      Type=oneshot

      ExecStart=/bin/systemctl reload docker-compose.service

- name: Install docker-compose-reload.timer
  copy:
    dest: /etc/systemd/system/docker-compose-reload.timer
    content: |
      [Unit]
      Description=Refresh images and update containers
      Requires=docker-compose.service
      After=docker-compose.service

      [Timer]
      OnCalendar=*:0/{{ docker_compose_reload_minutes }}

      [Install]
      WantedBy=timers.target
  register: docker_compose_reload_timer

- name: Enable docker-compose-reload.timer
  systemd:
    name: docker-compose-reload.timer
    daemon_reload: yes
    enabled: yes

- name: Restart docker-compose-reload.timer if it changed
  systemd:
    name: docker-compose-reload.timer
    daemon_reload: yes
    state: restarted
  when: docker_compose_reload_timer.changed and packer_build_name is not defined