---
- hosts: all
  tasks:
  - name: Update the apt package index
    become: yes
    apt:
      name: "*"
      state: latest
      update_cache: yes
      force_apt_get: yes
  - name: Install packages for apt add repository over HTTPS
    become: yes
    apt:
      name: "{{ packagesdep }}"
      force_apt_get: yes
      state: latest
      update_cache: yes
    vars:
      packagesdep:
      - git
      - apt-transport-https
      - ca-certificates
      - wget
      - software-properties-common
      - gnupg2
      - curl
  - name: Add Apt signing key from official docker repo
    apt_key:
      url: https://download.docker.com/linux/debian/gpg
      state: present
  - name: add docker official repository for Debian Stretch
    apt_repository:
      repo: deb [arch=amd64] https://download.docker.com/linux/debian stretch stable
      state: present
  - name: Index new repo into the cache
    become: yes
    apt:
      name: "*"
      state: latest
      update_cache: yes
      force_apt_get: yes
  - name: actually install docker
    apt:
      name: "docker-ce"
      state: latest
- name: Ensure docker-compose is installed and available
    get_url:
      url: https://github.com/docker/compose/releases/download/1.22.0/docker-compose-{{ ansible_system }}-{{ ansible_userspace_architecture }}
      dest: /usr/local/bin/docker-compose
      mode: 'u+x,g+x'