kolla-ansible/ansible/roles/nova/tasks/create_cells.yml

---
- name: Create cell0 mappings
  vars:
    nova_api: "{{ nova_services['nova-api'] }}"
  become: true
  kolla_docker:
    action: "start_container"
    command: bash -c 'sudo -E kolla_set_configs && nova-manage cell_v2 map_cell0'
    common_options: "{{ docker_common_options }}"
    detach: False
    image: "{{ nova_api.image }}"
    labels:
      BOOTSTRAP:
    name: "create_cell0_nova"
    restart_policy: no
    volumes: "{{ nova_api.volumes|reject('equalto', '')|list }}"
  register: map_cell0
  changed_when:
    - map_cell0 is success
    - '"Cell0 is already setup" not in map_cell0.stdout'
  failed_when:
    - map_cell0.rc != 0
  run_once: True
  delegate_to: "{{ groups[nova_api.group][0] }}"

- include_tasks: bootstrap_service.yml
  when: map_cell0.changed

- name: Get list of existing cells
  vars:
    nova_api: "{{ nova_services['nova-api'] }}"
  become: true
  kolla_docker:
    action: "start_container"
    command: bash -c 'sudo -E kolla_set_configs && nova-manage cell_v2 list_cells --verbose'
    common_options: "{{ docker_common_options }}"
    detach: False
    image: "{{ nova_api.image }}"
    labels:
      BOOTSTRAP:
    name: "list_cells_nova"
    restart_policy: no
    volumes: "{{ nova_api.volumes|reject('equalto', '')|list }}"
  register: existing_cells_list
  changed_when: false
  failed_when:
    - existing_cells_list.rc != 0
  run_once: True
  delegate_to: "{{ groups[nova_api.group][0] }}"

- name: Check if a base cell already exists
  vars:
    nova_api: "{{ nova_services['nova-api'] }}"
    # We match lines containing a UUID in a column (except the one used by
    # cell0), followed by two other columns, the first containing the transport
    # URL and the second the database connection. For example:
    #
    # | None | 68a3f49e-27ec-422f-9e2e-2a4e5dc8291b | rabbit://openstack:password@1.2.3.4:5672 | mysql+pymysql://nova:password@1.2.3.4:3306/nova |  False   |
    #
    # NOTE(priteau): regexp doesn't support passwords containing spaces
    regexp: '\| +(?!00000000-0000-0000-0000-000000000000)([0-9a-f\-]+) +\| +([^ ]+) +\| +([^ ]+) +\| +([^ ]+) +\|$'
  set_fact:
    existing_cells: "{{ existing_cells_list.stdout | regex_findall(regexp, multiline=True) }}"
  run_once: True
  delegate_to: "{{ groups[nova_api.group][0] }}"

- name: Create base cell for legacy instances
  vars:
    nova_api: "{{ nova_services['nova-api'] }}"
  become: true
  kolla_docker:
    action: "start_container"
    command: bash -c 'sudo -E kolla_set_configs && nova-manage cell_v2 create_cell'
    common_options: "{{ docker_common_options }}"
    detach: False
    image: "{{ nova_api.image }}"
    labels:
      BOOTSTRAP:
    name: "create_cell_nova"
    restart_policy: no
    volumes: "{{ nova_api.volumes|reject('equalto', '')|list }}"
  register: base_cell
  changed_when:
    - base_cell is success
  failed_when:
    - base_cell.rc != 0
    - '"already exists" not in base_cell.stdout'
  run_once: True
  delegate_to: "{{ groups[nova_api.group][0] }}"
  when: existing_cells | length == 0

- name: Update base cell for legacy instances
  vars:
    connection_url: "mysql+pymysql://{{ nova_database_user }}:{{ nova_database_password }}@{{ nova_database_address }}/{{ nova_database_name }}"
    nova_api: "{{ nova_services['nova-api'] }}"
  become: true
  kolla_docker:
    action: "start_container"
    command: "bash -c 'sudo -E kolla_set_configs && nova-manage cell_v2 update_cell --cell_uuid {{ existing_cells[0][0] }}'"
    common_options: "{{ docker_common_options }}"
    detach: False
    image: "{{ nova_api.image }}"
    labels:
      BOOTSTRAP:
    name: "create_cell_nova"
    restart_policy: no
    volumes: "{{ nova_api.volumes|reject('equalto', '')|list }}"
  register: base_cell
  changed_when:
    - base_cell is success
  failed_when:
    - base_cell.rc != 0
  run_once: True
  delegate_to: "{{ groups[nova_api.group][0] }}"
  when:
    - existing_cells | length == 1
    - existing_cells[0][1] != rpc_transport_url or existing_cells[0][2] != connection_url

- name: Print warning if a duplicate cell is detected
  vars:
    nova_api: "{{ nova_services['nova-api'] }}"
  fail:
    msg: Multiple base cells detected, manual cleanup with `nova-manage cell_v2` may be required.
  ignore_errors: yes
  run_once: True
  delegate_to: "{{ groups[nova_api.group][0] }}"
  when:
    - existing_cells | length > 1