Add global HA policy for rabbitmq

This patch adds 2 new variables into group_vars: oslomsg_notify_policies
and oslomsg_rpc_policies. These variables contain default rabbitmq
policies, which will be applied for every vhost.
As for now they contain only 1 policy, which enables HA mode[0].

[0] - https://www.rabbitmq.com/ha.html

Change-Id: I6857b2f8ccab169a2317b1de4cc106404534e3e4

inventory/group_vars/all/infra.yml

@@ -24,6 +24,11 @@ rabbitmq_servers: >-
       | map('extract', hostvars, 'ansible_host')
       | list | join(',')
   }}
+rabbitmq_policies:
+  - name: "HA"
+    pattern: '^(?!(amq\.)|(.*_fanout_)|(reply_)).*'
+    priority: 0
+    tags: "ha-mode=all"
 
 ## Galera options
 galera_client_package_state: "{{ package_state }}"

inventory/group_vars/all/oslo-messaging.yml

@@ -19,6 +19,7 @@ oslomsg_rpc_port: "{{ (groups[qdrouterd_host_group] | length > 0) | ternary(qdro
 oslomsg_rpc_servers: "{{ (groups[qdrouterd_host_group] | length > 0) | ternary(qdrouterd_servers, rabbitmq_servers) }}"
 oslomsg_rpc_use_ssl: "{{ (groups[qdrouterd_host_group] | length > 0) | ternary(qdrouterd_use_ssl, rabbitmq_use_ssl) }}"
 oslomsg_rpc_host_group: "{{ (groups[qdrouterd_host_group] | length > 0) | ternary(qdrouterd_host_group, rabbitmq_host_group) }}"
+oslomsg_rpc_policies: "{{ rabbitmq_policies }}"
 
 # Notify
 oslomsg_notify_transport: "{{ (groups[rabbitmq_host_group] | length > 0) | ternary('rabbit', 'none') }}"
@@ -26,3 +27,4 @@ oslomsg_notify_port: "{{ rabbitmq_port }}"
 oslomsg_notify_servers: "{{ rabbitmq_servers }}"
 oslomsg_notify_use_ssl: "{{ rabbitmq_use_ssl }}"
 oslomsg_notify_host_group: "{{ rabbitmq_host_group }}"
+oslomsg_notify_policies: "{{ rabbitmq_policies }}"

releasenotes/notes/oslomsg_policies-7ac27a5c2a7fbed2.yaml

@@ -0,0 +1,9 @@
+---
+features:
+  - |
+    Added 2 new varibles for all groups - `oslomsg_notify_policies` and
+    `oslomsg_rpc_policies`. These variables contain default rabbitmq
+    policies, which will be applied for every rabbitmq vhost. As for now they
+    will enable [HA mode](https://www.rabbitmq.com/ha.html) for all vhosts.
+    If you would like to disable HA mode just set these variables to empty
+    lists inside your `user_config.yml`