ansible/roles/docker/tasks/main.yml

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- name: install required packages for docker
  yum:
    name: "{{ packages }}"
  vars:
    packages:
    - yum-utils
    - device-mapper-persistent-data
    - lvm2
- name: add docker repo
  yum_repository:
    name: docker-ce-stable
    description: "Docker CE Stable - $basearch"
    baseurl: "{{ docker_repo_baseurl }}"
    gpgcheck: yes
    gpgkey: https://download.docker.com/linux/centos/gpg
- name: install docker
  yum:
    name: docker-ce
- name: create docker directory in data dir
  file:
    path: "{{ default_data_dirs[0] }}/docker"
    state: directory
    mode: 0755
- name: link /var/lib/docker
  file:
    src: "{{ default_data_dirs[0] }}/docker"
    dest: /var/lib/docker
    state: link
- name: "add {{ cluster_user }} to docker group"
  user:
    name: "{{ cluster_user }}"
    groups: docker
    append: yes
- name: "start docker service"
  service:
    name: docker
    state: started