ansible/roles/docker/tasks/main.yml

# Configure groups
- name: Ensure group "{{ docker_group }}" exists
  include_role:
    name: add_group
  vars:
    add_group_groups: "{{ docker_group }}"

# Install TLS files
- name: Install the TLS CA
  copy:
    src: "{{ docker_ca }}"
    dest: "{{ docker_keydir }}/ca.pem"
    owner: "{{ docker_owner }}"
    group: "{{ docker_group }}"
    mode: '0400'
  register: docker_copy
  changed_when: docker_copy.src is defined
  when: docker_ca is defined
- name: Install the TLS certificate
  copy:
    src: "{{ docker_cert }}"
    dest: "{{ docker_keydir }}/node.pem"
    owner: "{{ docker_owner }}"
    group: "{{ docker_group }}"
    mode: '0400'
  register: docker_copy
  changed_when: docker_copy.src is defined
  when: docker_cert is defined
- name: Install the TLS key
  copy:
    src: "{{ docker_key }}"
    dest: "{{ docker_keydir }}/node.key"
    owner: "{{ docker_owner }}"
    group: "{{ docker_group }}"
    mode: '0400'
  register: docker_copy
  changed_when: docker_copy.src is defined
  when: docker_cert is defined

# Install docker
- name: Add the Docker apt repo
  vars:
    docker_gpgkey: /etc/apt/trusted.gpg.d/docker.asc
  block:
    - name: Fetch the Docker GPG key
      ansible.builtin.get_url:
        url: https://download.docker.com/linux/ubuntu/gpg
        dest: "{{ docker_gpgkey }}"

    - name: Add the Docker repo
      ansible.builtin.apt_repository:
        repo: "deb [arch=arm64 signed-by={{ docker_gpgkey }}] https://download.docker.com/linux/ubuntu {{ ansible_distribution_release }} stable"
        state: present
- name: Sync apt
  apt:
    update_cache: yes
  changed_when: false
- name: Install Docker
  apt:
    name:
      - docker-ce
      - docker-ce-cli
      - containerd.io
      - docker-compose-plugin
      - python3-docker
      - python3-websocket
    state: latest

# Run docker
- name: Start Docker
  systemd:
    name: docker
    enabled: no
    state: started
  when: docker_run
- name: Start a swarm from first node
  community.docker.docker_swarm:
    state: present
  delegate_to: "{{ ansible_play_hosts | first }}"
  run_once: true