---
- name: Install Docker
  apt:
    update_cache: true
    name:
      - docker.io  # Warning: Docker package stands for an unrelated project
    state: present
  register: apt_result
  retries: 3
  until: apt_result is succeeded

- name: Protect adm from Docker containers
  template:
    src: systemd/system/docker.service.d/override.conf.j2
    dest: /etc/systemd/system/docker.service.d/override.conf
    owner: root
    group: root
    mode: 0644
  notify: Restart Docker