okd/roles/docker_storage_setup/tasks/main.yml

---
- name: Ensure docker is installed
  action: "{{ ansible_pkg_mgr }} name={{ item }} state=present"
  with_items:
  - docker

# Docker doesn't seem to start cleanly the first time run
#  when loopback (not directlvm) is configured. Putting in an
#  ignore errors, and then sleeping till it can come up cleanly
- name: Try to start docker.  This might fail (loopback startup issue)
  service:
    name: docker
    state: started
  ignore_errors: yes

- name: Pause for 1 minute
  pause:
    seconds: 30

- name: Ensure docker is started
  service:
    name: docker
    state: started

- name: Determine if loopback
  shell: docker info | grep 'Data file:.*loop'
  register: loop_device_check
  ignore_errors: yes

- debug:
    var: loop_device_check

- name: fail if we don't detect loopback
  fail:
    msg:  loopback not detected! Please investigate manually.
  when: loop_device_check.rc == 1

- name: "check to see if {{ dss_docker_device }} exists"
  command: "test -e {{ dss_docker_device }}"
  register: docker_dev_check
  ignore_errors: yes

- debug: var=docker_dev_check

- name: "fail if {{ dss_docker_device }} doesn't exist"
  fail:
    msg: "{{ dss_docker_device }} doesn't exist. Please investigate"
  when: docker_dev_check.rc != 0

- name: stop docker
  service:
    name: docker
    state: stopped

- name: delete /var/lib/docker
  command: rm -rf /var/lib/docker

- name: remove /var/lib/docker
  command: rm -rf /var/lib/docker

- name: copy the docker-storage-setup config file
  copy:
    content: >
      DEVS={{ dss_docker_device }}\n
      VG=docker_vg
    dest: /etc/sysconfig/docker-storage-setup
    owner: root
    group: root
    mode: 0664

- name: docker storage setup
  command: docker-storage-setup
  register: docker_storage_setup_output

- debug:
    msg:  "{{ docker_storage_setup_output }}"

- name: extend the vg
  command: lvextend -l 90%VG /dev/docker_vg/docker-pool
  register: lvextend_output

- debug:
    msg: "{{ lvextend_output }}"

- name: start docker
  service:
    name: docker
    state: restarted

- name: docker info
  command: docker info
  register: dockerinfo

- debug:
    msg: "{{ dockerinfo }}"