Add variable to control queues redundancy

Since we have 2 redundancy scenarios that are controlled independnetly
and are exclusive, we add variable to disable any queues redundancy.
This also allows to adjust logic of classic queues versioning, since usage
of CQv2 with classic mirrored queues may result in reduced performance
as CQv2 do not have optimizations for mirrored queues [1]

[1] https://blog.rabbitmq.com/posts/2023/05/rabbitmq-3.12-performance-improvements/#classic-queues-massively-improved-classic-queues-v2-cqv2

Change-Id: I81c7e9ce0ed090d7b87ba865c7dd5b4b706701d5

doc/source/user/messaging/messaging.rst

@@ -87,7 +87,7 @@ to the rabbitmq server backend.
 
 .. literalinclude:: ../../../../inventory/group_vars/all/oslo-messaging.yml
    :language: yaml
-   :start-after: ## Main
+   :start-after: under the License.
 
 .. _oslo-messaging.yml: https://github.com/openstack/openstack-ansible/blob/master/inventory/group_vars/all/oslo-messaging.yml
 

inventory/group_vars/all/infra.yml

@@ -24,18 +24,24 @@ rabbitmq_servers: >-
       | map('extract', hostvars, 'management_address')
       | list | join(',')
   }}
+
+# If you do not want to use neither quorum queues nor classic mirror queues,
+# set rabbitmq_queue_replication to False
+rabbitmq_queue_replication: True
+oslomsg_rabbit_quorum_queues: False
+
 rabbitmq_policies:
   - name: "HA"
     pattern: '^(?!(amq\.)|(.*_fanout_)|(reply_)).*'
     priority: 0
     tags: "ha-mode=all"
-    state: "{{ (oslomsg_rabbit_quorum_queues | default(True)) | ternary('absent', 'present') }}"
+    state: "{{ (oslomsg_rabbit_quorum_queues | default(True) or not rabbitmq_queue_replication) | ternary('absent', 'present') }}"
   - name: CQv2
     pattern: '.*'
     priority: 0
     tags:
       queue-version: 2
-    state: "{{ (oslomsg_rabbit_quorum_queues | default(True)) | ternary('absent', 'present') }}"
+    state: "{{ (oslomsg_rabbit_quorum_queues | default(True) or not rabbitmq_queue_replication) | ternary('present', 'absent') }}"
 
 ## Galera options
 galera_client_package_state: "{{ package_state }}"

inventory/group_vars/all/oslo-messaging.yml

@@ -12,9 +12,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-## Main
-oslomsg_rabbit_quorum_queues: False
-
 # RPC
 oslomsg_rpc_transport: "{{ (groups[qdrouterd_host_group] | length > 0) | ternary('amqp', 'rabbit') }}"
 oslomsg_rpc_port: "{{ (groups[qdrouterd_host_group] | length > 0) | ternary(qdrouterd_port, rabbitmq_port) }}"

releasenotes/notes/rabbitmq_queue_replication-4deacbb389dd2e25.yaml

@@ -0,0 +1,7 @@
+---
+features:
+  - |
+    Added new variable ``rabbitmq_queue_replication`` that allows to control
+    if any redundancy features (like quorum queues or classic mirrored queues)
+    will be used.
+    By default it is set to ``True``.