Ansible playbook to setup Docker 1.1.1 in Vagrant

playbook.yml

---
- hosts: all
  remote_user: vagrant
  tasks:
  - name: install apt signing key
    apt_key: url=https://get.docker.io/gpg state=present

  - name: add repository
    copy: src=docker.list dest=/etc/apt/sources.list.d/docker.list

  - name: install package
    apt: pkg=lxc-docker=1.1.1 update_cache=yes state=present

  - name: ensure docker is running
    service: name=docker state=started enabled=true

  - name: add vagrant user to docker group
    user: name=vagrant groups=docker append=yes

Create a docker.list:

deb http://get.docker.io/ubuntu docker main