Add online_data_migrations for placement

According to the placement upgrade process, online_data_migrations
should be triggered right after upgrading database schema
and placement services on all controller nodes [1]

We also replace usage of  `need_service_restart` local fact
with `need_online_data_migrations` as first one is never actually used.

[1] https://docs.openstack.org/placement/latest/cli/placement-manage.html#placement-database

Change-Id: I430ea45fe321440d832a0a90747b80f5d197f073

tasks/main.yml

@@ -154,3 +154,14 @@
 
 - name: Flush handlers
   meta: flush_handlers
+
+- name: Including placement_db_post_setup tasks
+  include_tasks: placement_db_post_setup.yml
+  args:
+    apply:
+      tags:
+        - placement-config
+  when:
+    - "_placement_is_last_play_host"
+  tags:
+    - placement-config

tasks/placement_db_post_setup.yml

@@ -0,0 +1,45 @@
+---
+# Copyright 2023, Cleura AB.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+- name: Refresh local facts
+  setup:
+    filter: ansible_local
+    gather_subset: "!all"
+
+- name: Perform a Placement DB online migrations
+  command: "{{ placement_bin }}/placement-manage db online_data_migrations"
+  become: true
+  become_user: "{{ placement_system_user_name }}"
+  changed_when: false
+  retries: 5
+  delay: 3
+  until: "data_migrations.rc in [0, 2]"
+  register: data_migrations
+  when:
+    - "ansible_local['openstack_ansible']['placement']['need_online_data_migrations'] | bool"
+    - _placement_is_last_play_host
+
+- name: Disable the online migrations requirement
+  delegate_to: "{{ item }}"
+  ini_file:
+    dest: "/etc/ansible/facts.d/openstack_ansible.fact"
+    section: placement
+    option: need_online_data_migrations
+    value: False
+    mode: "0644"
+  with_items: "{{ groups[placement_services['placement-api']['group']] }}"
+  when:
+    - data_migrations is not skipped
+    - data_migrations is succeeded

tasks/placement_install.yml

@@ -50,7 +50,7 @@
     venv_pip_packages: "{{ placement_pip_packages }}"
     venv_facts_when_changed:
       - section: "placement"
-        option: "need_service_restart"
+        option: "need_online_data_migrations"
         value: True
       - section: "placement"
         option: "venv_tag"
@@ -61,11 +61,11 @@
   ini_file:
     dest: "/etc/ansible/facts.d/openstack_ansible.fact"
     section: "placement"
-    option: "need_service_restart"
+    option: "need_online_data_migrations"
     value: true
     mode: "0644"
   when: (install_packages is changed) or
-        ('need_service_restart' not in ansible_local['openstack_ansible']['placement'])
+        ('need_online_data_migrations' not in ansible_local['openstack_ansible']['placement'])
 
 - name: Run the systemd service role
   include_role:

vars/main.yml

@@ -15,9 +15,15 @@
 
 _placement_is_first_play_host: >-
   {{
-    (placement_services['placement-api']['group'] in group_names and
-      inventory_hostname == (groups[placement_services['placement-api']['group']] | intersect(ansible_play_hosts)) | first) | bool
+    (placement_services['placement-api']['group'] in group_names and inventory_hostname == (
+      groups[placement_services['placement-api']['group']] | intersect(ansible_play_hosts)) | first) | bool
   }}
+_placement_is_last_play_host: >-
+  {{
+    (placement_services['placement-api']['group'] in group_names and inventory_hostname == (
+      groups[placement_services['placement-api']['group']] | intersect(ansible_play_hosts)) | last) | bool
+  }}
+
 
 # Compile a list of the services on a host based on whether
 # the host is in the host group and the service is enabled.