Add support for RabbitMQ Mirrored Queues.

Previously, the openstack::quantum class could only have
a single rabbit broker by using the rabbit_host parameter.

This patch allows users to specify an array of rabbitmq brokers by
introducing the rabbit_hosts parameter to leverage
Rabbit Mirrored Queues (rabbit_ha_queues).

Defaults to false for backwards compatability and to not
implement rabbit_ha_queues.

Change-Id: I24f8dadde3324e589ae38603d85acd61ccf4d911

manifests/quantum.pp

@@ -86,6 +86,11 @@
 #   Host where rabbitmq is running.
 #   (optional) 127.0.0.1
 #
+# [rabbit_hosts]
+#   Enable/disable Qauntum to use rabbitmq mirrored queues.
+#   Specifies an array of clustered rabbitmq brokers.
+#   (optional) false
+#
 # [rabbit_virtual_host]
 #   Virtual host to use for rabbitmq.
 #   (optional) Defaults to '/'.
@@ -159,6 +164,7 @@ class openstack::quantum (
   # Rabbit Information
   $rabbit_user            = 'rabbit_user',
   $rabbit_host            = '127.0.0.1',
+  $rabbit_hosts           = false,
   $rabbit_virtual_host    = '/',
   # Database. Currently mysql is the only option.
   $db_type                = 'mysql',
@@ -177,6 +183,7 @@ class openstack::quantum (
     enabled             => $enabled,
     bind_host           => $bind_address,
     rabbit_host         => $rabbit_host,
+    rabbit_hosts        => $rabbit_hosts,
     rabbit_virtual_host => $rabbit_virtual_host,
     rabbit_user         => $rabbit_user,
     rabbit_password     => $rabbit_password,

spec/classes/openstack_quantum_spec.rb

@@ -30,6 +30,7 @@ describe 'openstack::quantum' do
         :enabled             => true,
         :bind_host           => '0.0.0.0',
         :rabbit_host         => '127.0.0.1',
+        :rabbit_hosts        => false,
         :rabbit_virtual_host => '/',
         :rabbit_user         => 'rabbit_user',
         :rabbit_password     => 'rabbit_pass',