ceph-ansible/roles/ceph-osd/tasks/crush_rules.yml

---
- name: configure crush hierarchy
  ceph_crush:
    cluster: "{{ cluster }}"
    location: "{{ osd_crush_location }}"
    containerized: "{{ hostvars[groups[mon_group_name][0]]['container_exec_cmd'] | default('') }}"
  register: config_crush_hierarchy
  delegate_to: '{{ groups[mon_group_name][0] }}'
  when:
    - hostvars[groups[mon_group_name][0]]['create_crush_tree'] | default(create_crush_tree) | bool
    - osd_crush_location is defined

- name: create configured crush rules
  ceph_crush_rule:
    name: "{{ item.name }}"
    cluster: "{{ cluster }}"
    rule_type: replicated
    bucket_root: "{{ item.root }}"
    bucket_type: "{{ item.type }}"
    device_class: "{{ item.class | default(omit) }}"
  environment:
    CEPH_CONTAINER_IMAGE: "{{ ceph_docker_registry + '/' + ceph_docker_image + ':' + ceph_docker_image_tag if containerized_deployment | bool else None }}"
    CEPH_CONTAINER_BINARY: "{{ container_binary }}"
  with_items: "{{ hostvars[groups[mon_group_name][0]]['crush_rules'] | default(crush_rules) | unique }}"
  delegate_to: '{{ groups[mon_group_name][0] }}'
  run_once: true

- name: get id for new default crush rule
  ceph_crush_rule:
    name: "{{ item.name }}"
    cluster: "{{ cluster }}"
    state: info
  environment:
    CEPH_CONTAINER_IMAGE: "{{ ceph_docker_registry + '/' + ceph_docker_image + ':' + ceph_docker_image_tag if containerized_deployment | bool else None }}"
    CEPH_CONTAINER_BINARY: "{{ container_binary }}"
  register: info_ceph_default_crush_rule
  with_items: "{{ hostvars[groups[mon_group_name][0]]['crush_rules'] | default(crush_rules) | unique }}"
  delegate_to: '{{ groups[mon_group_name][0] }}'
  run_once: true
  when: item.default | default(False) | bool

# If multiple rules are set as default (should not be) then the last one is taken as actual default.
# the with_items statement overrides each iteration with the new one.
# NOTE(leseb): we should actually fail if multiple rules are set as default
- name: set_fact info_ceph_default_crush_rule_yaml, ceph_osd_pool_default_crush_rule_name
  set_fact:
    info_ceph_default_crush_rule_yaml: "{{ item.stdout | default('{}', True) | from_json() }}"
    ceph_osd_pool_default_crush_rule_name: "{{ (item.stdout | default('{}', True) | from_json).get('rule_name') }}"
  with_items: "{{ info_ceph_default_crush_rule.results }}"
  run_once: true
  when: not item.get('skipped', false)

- name: insert new default crush rule into daemon to prevent restart
  command: "{{ hostvars[item]['container_exec_cmd'] | default('') }} ceph --admin-daemon /var/run/ceph/{{ cluster }}-mon.{{ hostvars[item]['monitor_name'] }}.asok config set osd_pool_default_crush_rule {{ info_ceph_default_crush_rule_yaml.rule_id }}"
  changed_when: false
  delegate_to: "{{ item }}"
  with_items: "{{ groups[mon_group_name] }}"
  run_once: true
  when:
    - info_ceph_default_crush_rule_yaml | default('') | length > 0

- name: "add new default crush rule to {{ cluster }}.conf"
  ini_file:
    dest: "/etc/ceph/{{ cluster }}.conf"
    section: "global"
    option: "osd pool default crush rule"
    value: "{{ info_ceph_default_crush_rule_yaml.rule_id }}"
  delegate_to: "{{ item }}"
  with_items: "{{ groups[mon_group_name] }}"
  run_once: true
  when:
    - info_ceph_default_crush_rule_yaml | default('') | length > 0