roles/create-vms/files/docker-install-playbook.yml

---
# Installs docker with apt, docker-compose with pip, adds user to group
# Must be run as root

- hosts: docker
  remote_user: ubuntu
  become: yes

  tasks:

    # https://docs.docker.com/engine/installation/linux/ubuntulinux/
    - name: Prereqs and SSL support for apt for SSL
      apt:
        name={{ item }}
        update_cache=yes
        cache_valid_time=3600
      with_items:
        - apt-transport-https
        - ca-certificates
        - python-pip

    - name: Trust docker apt key
      apt_key:
        keyserver=pool.sks-keyservers.net
        id=58118E89F3A912897C070ADBF76221572C52609D

    - name: Add docker apt repo
      apt_repository:
        repo="deb https://apt.dockerproject.org/repo ubuntu-trusty main"

    - name: Install docker
      apt:
        update_cache=yes
        cache_valid_time=3600
        name=docker-engine

    - name: Make ubuntu user part of the Docker group
      user:
        name="ubuntu" groups="docker" append=yes

    # https://docs.docker.com/compose/install/#install-using-pip
    - name: Install docker-compose from PyPi
      pip:
        name=docker-compose