self-hosting/roles/docker/tasks/main.yml

---
- 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']
    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 }}"
    id: 9DC858229FC7DD38854AE2D88D81803C0EBFCD88
    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
    update_cache: true

- name: Install Docker.
  package:
    name: docker-ce
    state: present
  notify: restart docker

- name: Ensure containerd service dir exists.
  file:
    path: /etc/systemd/system/containerd.service.d
    state: directory

- name: Add shim to ensure Docker can start in all environments.
  template:
    src: override.conf.j2
    dest: /etc/systemd/system/containerd.service.d/override.conf
  register: override_template

- name: Reload systemd daemon if template is changed.
  systemd:
    daemon_reload: true
  when: override_template is changed

- name: Ensure Docker is started and enabled at boot.
  service:
    name: docker
    state: started
    enabled: true

- name: Ensure handlers are notified now to avoid firewall conflicts.
  meta: flush_handlers

- name: Install python3-pip
  apt:
    name: python3-pip
    state: latest
    cache_valid_time: 86400
  register: result
  retries: 3
  until: result is success


- name: Install docker-compose package dependencies
  apt:
    state: latest
    name: python3-setuptools
    update_cache: yes
    cache_valid_time: 86400
  register: result
  retries: 3
  until: result is success

- name: Install docker-compose
  pip:
    name: docker-compose