ceph-ansible/roles/ceph-validate/tasks/check_devices.yml

---
- name: find device used for operating system
  command: findmnt -v -n -T / -o SOURCE
  changed_when: false
  register: root_device

- name: resolve root_device
  command: "readlink -f {{ root_device.stdout }}"
  changed_when: false
  register: _root_device

- name: set_fact root_device
  set_fact:
    root_device: "{{ _root_device.stdout }}"

- name: lvm_volumes variable's tasks related
  when:
    - lvm_volumes is defined
    - lvm_volumes | length > 0
  block:
    - name: resolve devices in lvm_volumes
      command: "readlink -f {{ item.data }}"
      changed_when: false
      register: _lvm_volumes_data_devices
      with_items: "{{ lvm_volumes }}"
      when:
        - item.data_vg is undefined

    - name: set_fact lvm_volumes_data_devices
      set_fact:
        lvm_volumes_data_devices: "{{ lvm_volumes_data_devices | default([]) + [item.stdout] }}"
      with_items: "{{ _lvm_volumes_data_devices.results }}"
      when:
        - item.skipped is undefined

- name: devices variable's tasks related
  when:
    - devices is defined
    - devices | length > 0
  block:
    - name: resolve devices in devices
      command: "readlink -f {{ item }}"
      changed_when: false
      register: devices_resolved
      with_items: "{{ devices }}"

    - name: set_fact devices_resolved
      set_fact:
        _devices: "{{ _devices | default([]) + [item.stdout] }}"
      with_items: "{{ devices_resolved.results }}"

- name: fail if root_device is passed in lvm_volumes or devices
  fail:
    msg: "{{ root_device }} found in either lvm_volumes or devices variable"
  when: root_device in lvm_volumes_data_devices | default([]) or root_device in _devices | default([])

- name: check devices are block devices
  block:
    - name: get devices information
      parted:
        device: "{{ item }}"
        unit: MiB
      register: devices_parted
      failed_when: False
      with_items:
        - "{{ devices | default([]) }}"
        - "{{ lvm_volumes_data_devices | default([]) }}"

    - name: fail if one of the devices is not a device
      fail:
        msg: "{{ item.item }} is not a block special file!"
      when: item.rc is defined
      with_items: "{{ devices_parted.results }}"

    - name: fail when gpt header found on osd devices
      fail:
        msg: "{{ item.disk.dev }} has gpt header, please remove it."
      with_items: "{{ devices_parted.results }}"
      when:
        - item.skipped is undefined
        - item.disk.table == 'gpt'
        - item.partitions | length == 0