---
# tasks file for roles/docker
- name: install required system packages
  apt: 
    names:
    - apt-transport-https
    - 'ca-certificates'
    - 'curl'
    - 'software-properties-common'
    - 'python3-pip'
    - 'virtualenv'
    - 'python3-setuptools'
    state: present

- name: add Docker GPG apt Key
  apt_key:
    url: https://download.docker.com/linux/ubuntu/gpg
    state: present

- name: add Docker Repository
  apt_repository:
    repo: deb https://download.docker.com/linux/ubuntu bionic stable
    state: present
  register: docker_repo
  
- name: update apt cache
  apt:
    update_cache: yes
    cache_valid_time: 3600
  when: docker_repo is changed

- name: install docker-ce package
  apt:
    name: docker-ce
    state: present

- name: enable docker service
  systemd:
    name: docker
    state: started
    enabled: yes

- name: install Docker Module for Python
  pip:
    name: docker