---

- name: Ensure Docker prerequisites are installed
  apt:
    name:
      - apt-transport-https
      - ca-certificates
      - curl
      - "{{ 'gnupg2' if ansible_distribution == 'Debian' else 'gnupg-agent' }}"
      - software-properties-common
    state: present
  register: ensure_docker_prerequisites_installed
  until: ensure_docker_prerequisites_installed is succeeded
  retries: 3
  delay: 10

- name: Ensure Docker APT key is present
  apt_key:
    url: https://download.docker.com/linux/{{ ansible_distribution | lower }}/gpg
    state: present

- name: Ensure Docker repository is installed and configured
  apt_repository:
    filename: docker-ce
    repo: "deb https://download.docker.com/linux/{{ ansible_distribution | lower }} {{ ansible_distribution_release }} stable"
    update_cache: true