ceph-ansible/roles/ceph-mds/tasks/create_mds_filesystems.yml

---
- name: filesystem pools related tasks
  block:
    - name: create filesystem pools
      command: "{{ hostvars[groups[mon_group_name][0]]['docker_exec_cmd'] | default('') }} ceph --cluster {{ cluster }} osd pool create {{ item.name }} {{ item.pgs }}"
      changed_when: false
      delegate_to: "{{ groups[mon_group_name][0] }}"
      with_items:
        - "{{ cephfs_pools }}"

    - name: customize pool size
      command: "{{ hostvars[groups[mon_group_name][0]]['docker_exec_cmd'] | default('') }} ceph --cluster {{ cluster }} osd pool set {{ item.name }} size {{ item.size | default('') }}"
      with_items: "{{ cephfs_pools | unique }}"
      delegate_to: "{{ groups[mon_group_name][0] }}"
      changed_when: false
      when: item.size | default ("")

- name: check if ceph filesystem already exists
  command: "{{ hostvars[groups[mon_group_name][0]]['docker_exec_cmd'] | default('') }} ceph --cluster {{ cluster }} fs get {{ cephfs }}"
  register: check_existing_cephfs
  changed_when: false
  delegate_to: "{{ groups[mon_group_name][0] }}"
  failed_when: false

- name: create ceph filesystem
  command: "{{ hostvars[groups[mon_group_name][0]]['docker_exec_cmd'] | default('') }} ceph --cluster {{ cluster }} fs new {{ cephfs }} {{ cephfs_metadata }} {{ cephfs_data }}"
  changed_when: false
  delegate_to: "{{ groups[mon_group_name][0] }}"
  when:
    - check_existing_cephfs.rc != 0

- name: assign application to cephfs pools
  command: "{{ hostvars[groups[mon_group_name][0]]['docker_exec_cmd'] | default('') }} ceph --cluster {{ cluster }} osd pool application enable {{ item }} {{ cephfs }}"
  with_items:
    - "{{ cephfs_data }}"
    - "{{ cephfs_metadata }}"
  changed_when: false
  delegate_to: "{{ groups[mon_group_name][0] }}"
  when:
    - check_existing_cephfs.rc != 0

- name: allow multimds
  command: "{{ hostvars[groups[mon_group_name][0]]['docker_exec_cmd'] | default('') }} ceph --cluster {{ cluster }} fs set {{ cephfs }} allow_multimds true --yes-i-really-mean-it"
  changed_when: false
  delegate_to: "{{ groups[mon_group_name][0] }}"
  when:
    - ceph_release_num[ceph_release] == ceph_release_num.luminous

- name: set max_mds
  command: "{{ hostvars[groups[mon_group_name][0]]['docker_exec_cmd'] | default('') }} ceph --cluster {{ cluster }} fs set {{ cephfs }} max_mds {{ mds_max_mds }}"
  changed_when: false
  delegate_to: "{{ groups[mon_group_name][0] }}"
  when:
    - mds_max_mds > 1