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:
        data="{{ lookup('file', 'docker_apt_key.gpg') }}"

    - name: Add docker apt repo
      apt_repository:
        repo: "{{ docker_apt_repo | default('deb https://apt.dockerproject.org/repo ubuntu-trusty main') }}"

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

    - name: Install docker-compose from web
      get_url:
        url=https://github.com/docker/compose/releases/download/1.7.1/docker-compose-Linux-x86_64
        checksum=sha256:3166bb74bc648e68c3154bc704fddf6bccf59f03a0c90fc48aefac034535e4ae
        dest=/usr/local/bin/docker-compose
        owner=root mode=0755

    # This installs a bunch of prereqs that currently breaks SSL and CA's
    # https://docs.docker.com/compose/install/#install-using-pip
    #- name: Install docker-compose from PyPi
    #  pip:
    #    name=docker-compose

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

    - name: restart Docker daemon to get new group membership
      service:
        name=docker
        state=restarted