Tweak RabbitMQ version check to allow 3.13 to 4.1

Since RabbitMQ 4.1 supports the upgrade from 3.13 [1],
the assert condition and ``upgrade_version`` was adjusted accordingly.

[1] https://www.rabbitmq.com/docs/upgrade#rabbitmq-version-upgradability

Change-Id: I86eb058f88b49fcbbc4e219d5329aa6f0a339b95
Closes-Bug: #2118452
Signed-off-by: Seunghun Lee <[email protected]>
(cherry picked from commit cca5ecf)

Author: seunghun1ee

ansible/roles/rabbitmq/tasks/version-check.yml

@@ -50,12 +50,13 @@
             new_version_major: "{{ rabbitmq_version_new.stdout | regex_search('^[0-9]+') }}"
             new_version_minor: "{{ rabbitmq_version_new.stdout | regex_search('(?<=.)[^.].') }}"
             new_version: "{{ rabbitmq_version_new.stdout | regex_replace('.[^.]+$', '') }}"
-            # Note: this assumes 3.13 will be the last release before 4.0.
-            upgrade_version: "{{ '4.0' if current_version == '3.13' else current_version_major + '.' + (current_version_minor | int + 1) | string }}"
+            # Note: 3.13 is the last release before 4.0.
+            upgrade_version: "{{ '4.0 or 4.1' if current_version == '3.13' else current_version_major + '.' + (current_version_minor | int + 1) | string }}"
           assert:
             that: (current_version_major == new_version_major and
                   new_version_minor | int - current_version_minor | int <= 1) or
-                  (new_version | float == 4.0 and current_version | float == 3.13)
+                  (new_version | float == 4.0 and current_version | float == 3.13) or
+                  (new_version | float == 4.1 and current_version | float == 3.13)
             fail_msg: >
               Looks like you're trying to run a skip-release upgrade!
               RabbitMQ must be at most one version behind the target release version ({{ rabbitmq_version_new.stdout | trim }}) to run this upgrade.

releasenotes/notes/allow-rabbitmq-3-13-to-4-1-8ae08d265c353301.yaml

@@ -0,0 +1,7 @@
+---
+
+fixes:
+  - |
+    Fixes bug `LP#2118452 <https://bugs.launchpad.net/kolla-ansible/+bug/2118452>`__
+    which stopped the RabbitMQ upgrade from version 3.13 to 4.1 even though it
+    is supported.