Run online data migration before update/upgrade converge.

Some services have an online component to their upgrade
procedure – operations which don’t induce downtime and
can run while the cloud operates normally.

Change-Id: I9b0bef15303bb14ef734b265f28607aa4d491910
(cherry picked from commit 43cc0dbec2)

tasks/update/create-overcloud-update-scripts.yaml

@@ -54,6 +54,13 @@
   with_items:
     - "{{ oc_roles|default('all') }}"
 
+- name: create online data migration script
+  template:
+    src: "overcloud_online_data_migration.sh.j2"
+    dest: "{{ working_dir }}/overcloud_online_data_migration.sh"
+    mode: 0755
+    force: true
+
 - name: create overcloud update converge script
   template:
     src: "{{ overcloud_update_converge_template }}"

tasks/update/main.yml

@@ -99,6 +99,13 @@
       include: ceph_update_run.yml
       when: ceph_osd_enabled|bool
 
+    - name: run online data migration
+      args:
+        chdir: "{{working_dir}}"
+      shell: |
+        set -o pipefail
+        bash {{ working_dir }}/overcloud_online_data_migration.sh 2>&1 {{ timestamper_cmd }} > overcloud_update_data_migration.log
+
     - name: apply pre overcloud update converge workarounds
       command: "{{working_dir}}/pre_overcloud_update_converge_workarounds.sh"
       when: updates_workarounds

tasks/upgrade/create-overcloud-upgrade-scripts.yaml

@@ -70,6 +70,13 @@
   with_items:
     - "{{ oc_roles|default('all') }}"
 
+- name: create online data migration script
+  template:
+    src: "overcloud_online_data_migration.sh.j2"
+    dest: "{{ working_dir }}/overcloud_online_data_migration.sh"
+    mode: 0755
+    force: true
+
 - name: create overcloud converge script
   vars:
     old_img: "{{ working_dir }}/{{ container_registry_file }}"

tasks/upgrade/main.yml

@@ -136,6 +136,13 @@
         chdir: "{{working_dir}}"
       when: upgrade_workarounds
 
+    - name: run online data migration
+      args:
+        chdir: "{{working_dir}}"
+      shell: |
+        set -o pipefail
+        bash {{ working_dir }}/overcloud_online_data_migration.sh 2>&1 {{ timestamper_cmd }} > overcloud_upgrade_data_migration.log
+
     - include: overcloud_upgrade_converge.yml
       tags: overcloud_upgrade_converge
 

templates/overcloud_online_data_migration.sh.j2

@@ -0,0 +1,18 @@
+#!/bin/env bash
+#
+# Run online data migration for OpenStack services
+#
+{% if overcloud_update|bool -%}
+{% set operation_type = 'update' -%}
+{% elif overcloud_upgrade|bool -%}
+{% set operation_type = 'upgrade' -%}
+{% endif -%}
+set -euo pipefail
+
+source {{ undercloud_rc }}
+
+echo "[$(date)] Run online data migration for overcloud during {{ operation_type }}"
+
+openstack overcloud external-{{ operation_type }} run \
+    --stack {{ overcloud_stack_name }} \
+    --tags online_upgrade 2>&1