docker_storage.yaml

---
- hosts: all
  vars_prompt:
    - name: partition
      prompt: "Enter the partition name: (sda, sdb, sdc, sdd)"
      private: no

  tasks:
    - name: verify /dev/docker-vg/docker-pool
      stat:
        path: /dev/docker-vg/docker-pool
      register: docker_vg_status

    - name: delete docker-storage-setup file
      file:
        path: /etc/sysconfig/docker-storage-setup
        state: absent
      when: docker_vg_status.stat.islink is not defined

    - name: create new file docker-storage-setup
      file:
        path: /etc/sysconfig/docker-storage-setup
        state: touch
      when: docker_vg_status.stat.islink is not defined

    - name: write configuration to /etc/sysconfig/docker-storage-setup file
      blockinfile:
        path: /etc/sysconfig/docker-storage-setup
        block: |
          DEVS=/dev/{{ partition }}
          VG=docker-vg
          WIPE_SIGNATURES=true
        when: docker_vg_status.stat.islink is not defined

    - name: stop docker service
      service:
        name: docker
        state: stopped
      when: docker_vg_status.stat.islink is not defined

    - name: delete docker-storage file
      file:
        path: /etc/sysconfig/docker-storage
        state: absent
      when: docker_vg_status.stat.islink is not defined

    - name: create docker-storage
      shell: docker-storage-setup
      when: docker_vg_status.stat.islink is not defined
  
    - name: extend LVM
      lvol:
        vg: docker-vg
        lv: docker-pool
        size: +100%FREE
 
    - name: start and enable docker service
      service:
        name: docker
        state: started
        enabled: yes