kubespray/roles/docker/tasks/main.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
      skip: true

- 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 repository public key is installed
  action: "{{ docker_repo_key_info.pkg_key }}"
  args:
    id: "{{item}}"
    keyserver: "{{docker_repo_key_info.keyserver}}"
    state: present
  with_items: "{{ docker_repo_key_info.repo_keys }}"

- name: ensure docker repository is enabled
  action: "{{ docker_repo_info.pkg_repo }}"
  args:
    repo: "{{item}}"
    state: present
  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:
    pkg: "{{item}}"
    state: present
  with_items: "{{ docker_package_info.pkgs }}"
  when: docker_package_info.pkgs|length > 0

- name: Centos needs xfs storage type for devicemapper if used
  lineinfile:
    dest: /etc/sysconfig/docker-storage
    line: "DOCKER_STORAGE_OPTIONS='--storage-opt dm.fs=xfs'"
    regexp: '^DOCKER_STORAGE_OPTIONS=.*$'
    state: present
    backup: yes
  when: ansible_os_family == "RedHat"

- meta: flush_handlers

- name: ensure docker service is started and enabled
  service:
    name: "{{ item }}"
    enabled: yes
    state: started
  with_items:
    - docker