geerlingguy.ansible-role-docker/tasks/setup-Debian.yml

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

- name: Ensure dependencies are installed.
  apt:
    name:
      - apt-transport-https
      - ca-certificates
    state: present
  when: docker_add_repo | bool

- name: Ensure additional dependencies are installed (on Ubuntu < 20.04 and any other systems).
  apt:
    name: gnupg2
    state: present
  when: ansible_distribution != 'Ubuntu' or ansible_distribution_version is version('20.04', '<')

- name: Ensure additional dependencies are installed (on Ubuntu >= 20.04).
  apt:
    name: gnupg
    state: present
  when: ansible_distribution == 'Ubuntu' and ansible_distribution_version is version('20.04', '>=')

- name: Ensure directory exists for /etc/apt/keyrings
  file:
    path: /etc/apt/keyrings
    state: directory
    mode: '0755'

- name: Ensure curl is present
  package: name=curl state=present

- name: Add Docker apt key
  shell: >
    curl -fsSL {{ docker_apt_gpg_key }} | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg --yes    
  changed_when: false

- name: Change permissions for /etc/apt/keyrings/docker.gpg
  file:
    path: /etc/apt/keyrings/docker.gpg
    mode: 'a+r'

- name: Add Docker repository.
  apt_repository:
    repo: "{{ docker_apt_repository }}"
    state: present
    filename: "{{ docker_apt_filename }}"
    update_cache: true
  when: docker_add_repo | bool