---

- name: Install apt-key
  apt_key:
    id: 0EBFCD88
    url: 'https://download.docker.com/linux/{{ ansible_distribution | lower }}/gpg'
    keyring: /etc/apt/trusted.gpg.d/docker.gpg

- name: Ensure https transport to be available
  apt:
    name: apt-transport-https
    cache_valid_time: 86400

- name: Activate apt-repo
  apt_repository:
    repo: 'deb https://download.docker.com/linux/{{ ansible_distribution | lower }} {{ ansible_distribution_release }} {{ docker_channel }}'
    state: present

- name: Install docker
  apt:
    name: docker-ce
    cache_valid_time: 86400

...