Docker deployment for tohtori and some refactoring

roles/docker/defaults/main.yml

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+---
+
+# The following help expose a docker port or to add additional options when
+# running docker daemon.  The default is to not use any special options.
+#docker_opts: >
+#  -H unix://
+#  -H tcp://0.0.0.0:2375
+#  --log-level=debug
+docker_opts: ""
+

roles/docker/handlers/main.yml

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+---
+# handlers file for docker.ubuntu
+- name: Start Docker
+  service: name=docker state=started
+
+- name: Reload docker
+  service: name=docker state=reloaded
+
+- name: Restart dockerio
+  service: name=docker state=restarted

roles/docker/tasks/main.yml

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+---
+- name: Install lxc-docker
+  apt:
+    pkg: "linux-image-{{ ansible_kernel }}"
+    state: installed
+
+- name: Add Ubuntu universe repo for pip
+  apt_repository:
+    repo: "deb http://mirrors.digitalocean.com/ubuntu trusty universe"
+    update_cache: yes
+    state: present
+
+- name: Install pip
+  apt:
+    pkg: "{{ item }}"
+    state: installed
+  with_items:
+    - python-dev
+
+- name: install pip
+  shell: easy_install -U pip
+  sudo: yes
+
+- name: Install Docker-py
+  pip:
+    name: docker-py
+
+- name: Make sure apt-transport-https is installed
+  apt:
+    pkg: "apt-transport-https"
+    state: installed
+
+- name: Add Docker repository key
+  apt_key:
+    id: "36A1D7869245C8950F966E92D8576A8BA88D21E9"
+    keyserver: "hkp://keyserver.ubuntu.com:80"
+    state: present
+
+- name: Add Docker repository and update apt cache
+  apt_repository:
+    repo: "deb http://get.docker.io/ubuntu docker main"
+    update_cache: yes
+    state: present
+
+- name: Install lxc-docker
+  apt:
+    pkg: "lxc-docker"
+    state: installed
+
+- name: Set docker daemon options
+  copy:
+    content: "DOCKER_OPTS=\"{{ docker_opts.rstrip('\n') }}\""
+    dest: /etc/default/docker
+    owner: root
+    group: root
+    mode: 0644
+  notify:
+    - Reload docker
+  when: docker_opts != ""
+
+- name: Start docker-lxc
+  service:
+    name: docker
+    state: started