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

---
- name: compile a list of pool names
  set_fact:
    cephfs_pool_names: "{{ cephfs_pools | map(attribute='name') | list }}"

- name: check if filesystem pool already exists
  delegate_to: "{{ groups[mon_group_name][0] }}"
  block:
    - name: get and store list of filesystem pools
      command: "{{ docker_exec_cmd | default('') }} ceph --cluster {{ cluster }} osd pool ls"
      changed_when: false
      register: osd_pool_ls

    - name: look whether pools to be created are present in the output
      set_fact:
        fs_pools_created: True
      when: osd_pool_ls.stdout_lines | intersect(cephfs_pool_names) | length > 0

- name: deploy filesystem pools
  when: fs_pools_created is not defined
  delegate_to: "{{ groups[mon_group_name][0] }}"
  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.pg_num | default(item.pgs) | default(osd_pool_default_pg_num) }}
        {{ item.pgp_num | default(item.pgs) | default(item.pg_num) | default(osd_pool_default_pg_num) }}
        {{ 'replicated_rule' if not item.rule_name | default('replicated_rule') else item.rule_name | default('replicated_rule') }}
        {{ 1 if item.type|default(1) == 'replicated' else 3 if item.type|default(1) == 'erasure' else item.type|default(1) }}
        {%- if (item.type | default("1") == '3' or item.type | default("1") == 'erasure') and item.erasure_profile != '' %}
        {{ item.erasure_profile }}
        {%- endif %}
        {{ item.expected_num_objects | default('') }}
      changed_when: false
      with_items:
        - "{{ cephfs_pools }}"

    - name: customize pool size
      command: "{{ docker_exec_cmd | default('') }} ceph --cluster {{ cluster }} osd pool set {{ item.name }} size {{ item.size | default(osd_pool_default_size) }}"
      with_items: "{{ cephfs_pools | unique }}"
      changed_when: false
      when: item.size | default(osd_pool_default_size) != ceph_osd_pool_default_size

    - name: customize pool min_size
      command: "{{ docker_exec_cmd | default('') }} ceph --cluster {{ cluster }} osd pool set {{ item.name }} min_size {{ item.min_size | default(osd_pool_default_min_size) }}"
      with_items: "{{ cephfs_pools | unique }}"
      changed_when: false
      when: (item.min_size | default(osd_pool_default_min_size))|int > ceph_osd_pool_default_min_size

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

- name: create ceph filesystem
  command: "{{ 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: "{{ 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: set max_mds
  command: "{{ 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