main.yml

---
-   set_fact: docker_package=docker.io
    when: ansible_distribution_major_version == '14' and ansible_distribution == 'Ubuntu'

-   set_fact: docker_package=lxc-docker
    when: ansible_distribution_major_version == '12' and ansible_distribution == 'Ubuntu'

-   set_fact: docker_default=/etc/default/{{ docker_package }}
    when: ansible_distribution_major_version == '14' and ansible_distribution == 'Ubuntu'

-   set_fact: docker_default=/etc/default/docker
    when: ansible_distribution_major_version == '12' and ansible_distribution == 'Ubuntu'
  
-   name: install docker
    apt: pkg={{ docker_package }} state=installed
    
-   name: Check Docker existence
    stat: path={{ docker_default }}
    register: docker_default_file

-   name: Check Docker Custom Opts existence
    stat: path=/etc/default/docker.ext
    register: docker_ext_default_file
  
-   name: Configuring DOCKER_OPTS for DOCKER HOST - key requirement for Shipyard server
    when: docker_default_file.stat.exists and docker_ext_default_file.stat.exists == False 
    shell: echo ". /etc/default/docker.ext" >> /etc/default/{{ docker_package }}
    
-   name: Creating extended DOCKER_OPTS
    when: ansible_distribution == 'Ubuntu' and docker_default_file.stat.exists
    template: src=docker.ext.j2 dest=/etc/default/docker.ext
    register: docker_host
    notify: restart docker

-   name: wait for docker on private ip port 4243
    wait_for: port=4243 delay=15 host={{ ansible_default_ipv4.address }}
    when: docker_host.changed

-   debug: msg="docker is up and listening on port 4243"