install docker on a largest number of linux distribution (based on https://github.com/marklee77/ansible-role-docker)

roles/docker/.gitignore

@@ -0,0 +1,2 @@
+.*.swp
+.vagrant

roles/docker/files/systemd-docker.service

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-[Unit]
-Description=Docker Application Container Engine
-Documentation=https://docs.docker.com
-After=network.target docker.socket
-Requires=docker.socket
-
-[Service]
-EnvironmentFile=-/etc/default/docker
-Type=notify
-ExecStart=/usr/bin/docker daemon -H fd:// $DOCKER_OPTS
-MountFlags=slave
-LimitNOFILE=1048576
-LimitNPROC=1048576
-LimitCORE=infinity
-
-[Install]
-WantedBy=multi-user.target

roles/docker/handlers/main.yml

@@ -1,12 +0,0 @@
----
-- name: restart docker
-  command: /bin/true
-  notify:
-    - reload systemd
-    - restart docker service
-
-- name: reload systemd
-  shell: systemctl daemon-reload
-
-- name: restart docker service
-  service: name=docker state=restarted

roles/docker/tasks/configure.yml

@@ -1,16 +0,0 @@
----
-- name: enable docker
-  service:
-    name: docker
-    enabled: yes
-    state: started
-  tags:
-    - docker
-
-#- name: login to arkena's docker registry
-#  shell : >
-#    docker login --username={{ dockerhub_user }}
-#    --password={{ dockerhub_pass }}
-#    --email={{ dockerhub_email }}
-
-- meta: flush_handlers

roles/docker/tasks/install.yml

@@ -1,24 +0,0 @@
----
-- name: Install prerequisites for https transport
-  apt: pkg={{ item }} state=present update_cache=yes
-  with_items:
-    - apt-transport-https
-    - ca-certificates
-
-- name: Configure docker apt repository
-  template: src=docker.list.j2 dest=/etc/apt/sources.list.d/docker.list backup=yes
-
-- name: Install docker-engine
-  apt: pkg={{ item }} state=present force=yes update_cache=yes
-  with_items:
-    - aufs-tools
-    - cgroupfs-mount
-    - docker-engine=1.9.1-0~{{ ansible_distribution_release }}
-
-- name: Copy default docker configuration
-  template: src=default-docker.j2 dest=/etc/default/docker backup=yes
-  notify: restart docker
-
-- name: Copy Docker systemd unit file
-  copy: src=systemd-docker.service dest=/lib/systemd/system/docker.service backup=yes
-  notify: restart docker

roles/docker/tasks/main.yml

@@ -1,3 +1,53 @@
 ---
-- include: install.yml
-- include: configure.yml
+- name: gather os specific variables
+  include_vars: "{{ item }}"
+  with_first_found:
+    - files:
+      - "{{ ansible_distribution|lower }}-{{ ansible_distribution_version|lower|replace('/', '_') }}.yml"
+      - "{{ ansible_distribution|lower }}-{{ ansible_distribution_release }}.yml"
+      - "{{ ansible_distribution|lower }}-{{ ansible_distribution_major_version|lower|replace('/', '_') }}.yml"
+      - "{{ ansible_distribution|lower }}.yml"
+      - "{{ ansible_os_family|lower }}.yml"
+      - defaults.yml
+      paths:
+      - ../vars
+
+- name: check for minimum kernel version
+  fail:
+    msg: >
+          docker requires a minimum kernel version of
+          {{ docker_kernel_min_version }} on
+          {{ ansible_distribution }}-{{ ansible_distribution_version }}
+  when: ansible_kernel|version_compare(docker_kernel_min_version, "<")
+
+- name: ensure docker requirements packages are installed
+  action: "{{ docker_package_info.pkg_mgr }}"
+  args: docker_package_info.args
+  with_items: docker_package_info.pre_pkgs
+  when: docker_package_info.pre_pkgs|length > 0
+
+- name: ensure docker repository public key is installed
+  action: "{{ docker_repo_key_info.pkg_key }}"
+  args: docker_repo_key_info.args
+  with_items: docker_repo_key_info.repo_keys
+  when: docker_repo_key_info.repo_keys|length > 0
+
+- name: ensure docker repository is enabled
+  action: "{{ docker_repo_info.pkg_repo }}"
+  args: docker_repo_info.args
+  with_items: docker_repo_info.repos
+  when: docker_repo_info.repos|length > 0
+
+- name: ensure docker packages are installed
+  action: "{{ docker_package_info.pkg_mgr }}"
+  args: docker_package_info.args
+  with_items: docker_package_info.pkgs
+  when: docker_package_info.pkgs|length > 0
+
+- name: ensure docker service is started and enabled
+  service:
+    name: "{{ item }}"
+    enabled: yes
+    state: started
+  with_items:
+    - docker

roles/docker/templates/default-docker.j2

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-# Docker Upstart and SysVinit configuration file
-
-# Customize location of Docker binary (especially for development testing).
-#DOCKER="/usr/local/bin/docker"
-
-# Use DOCKER_OPTS to modify the daemon startup options.
-#DOCKER_OPTS=""
-
-# If you need Docker to use an HTTP proxy, it can also be specified here.
-#export http_proxy="http://127.0.0.1:3128/"
-
-# This is also a handy place to tweak where Docker's temporary files go.
-#export TMPDIR="/mnt/bigdrive/docker-tmp"

roles/docker/templates/docker.list.j2

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-deb https://apt.dockerproject.org/repo {{ansible_distribution|lower}}-{{ ansible_distribution_release}} main

roles/docker/vars/centos-6.yml

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+docker_kernel_min_version: '2.6.32-431'
+
+docker_package_info:
+  pkg_mgr: yum
+  args:
+      name: "{{ item }}"
+      state: latest
+      update_cache: yes
+  pre_pkgs:
+    - epel-release
+    - curl
+    - device-mapper-libs
+  pkgs:
+    - docker-io
+
+docker_repo_key_info:
+  pkg_key: ''
+  args: {}
+  repo_keys: []
+
+docker_repo_info:
+  pkg_repo: ''
+  args: {}
+  repos: []

roles/docker/vars/debian.yml

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+docker_kernel_min_version: '3.2'
+
+docker_package_info:
+  pkg_mgr: apt
+  args:
+    pkg: "{{ item }}"
+    update_cache: yes
+    cache_valid_time: 600
+    state: latest
+  pre_pkgs: 
+    - apt-transport-https
+    - curl
+    - software-properties-common
+  pkgs:
+    - docker-engine
+
+docker_repo_key_info:
+  pkg_key: apt_key
+  args:
+    id: "{{ item }}"
+    keyserver: hkp://p80.pool.sks-keyservers.net:80
+    state: present
+  repo_keys:
+    - 58118E89F3A912897C070ADBF76221572C52609D 
+
+docker_repo_info:
+  pkg_repo: apt_repository
+  args:
+    repo: "{{ item }}"
+    update_cache: yes
+    state: present
+  repos:
+    - >
+       deb https://apt.dockerproject.org/repo 
+       {{ ansible_distribution|lower }}-{{ ansible_distribution_release|lower }}
+       main

roles/docker/vars/fedora-20.yml

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+docker_kernel_min_version: '0'
+
+docker_package_info:
+  pkg_mgr: yum
+  args:
+      name: "{{ item }}"
+      state: latest
+      update_cache: yes
+  pre_pkgs: 
+    - curl
+  pkgs:
+    - docker-io
+
+docker_repo_key_info:
+  pkg_key: ''
+  args: {}
+  repo_keys: []
+
+docker_repo_info:
+  pkg_repo: ''
+  args: {}
+  repos: []

roles/docker/vars/main.yml

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----
-#dockerhub_user:
-#dockerhub_pass:
-#dockerhub_email:

roles/docker/vars/redhat.yml

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+docker_kernel_min_version: '0'
+
+docker_package_info:
+  pkg_mgr: yum
+  args:
+      name: "{{ item }}"
+      state: latest
+      update_cache: yes
+  pre_pkgs: 
+    - curl
+  pkgs:
+    - docker
+
+docker_repo_key_info:
+  pkg_key: ''
+  args: {}
+  repo_keys: []
+
+docker_repo_info:
+  pkg_repo: ''
+  args: {}
+  repos: []