Add more oslo::cache params to init

This adds two new parameters cache_backend
and manage_backend_package that is simply
proxy parameters that is passed down to
oslo::cache like all other modules.

This does not introduce a behavior change
since cache_backend defaults to
$::os_service_default we do not enforce
any new package installs even though
manage_backend_package is set to true
(like it was before since that is
oslo::cache default)

Updates the testing so we test for the
oslo::cache resource and not the functionality
that the resource itself has.

Change-Id: Ib6f6853dd34e83e757bee0382ee84141e3f4dbd8

manifests/init.pp

@@ -125,10 +125,18 @@
 #   (string value)
 #   Defaults to $::os_service_default
 #
+# [*cache_backend*]
+#   (Optional) The backend to pass to oslo::cache.
+#   Defaults to $::os_service_default
+#
 # [*memcache_servers*]
 #   (Optional) A list of memcached server(s) to use for caching. (list value)
 #   Defaults to $::os_service_default
 #
+# [*manage_backend_package*]
+#   (Optional) If we should install the cache backend package.
+#   Defaults to true
+#
 # [*amqp_server_request_prefix*]
 #   (Optional) Address prefix used when sending to a specific server
 #   Defaults to $::os_service_default.
@@ -244,7 +252,9 @@ class ceilometer(
   $kombu_reconnect_delay              = $::os_service_default,
   $kombu_failover_strategy            = $::os_service_default,
   $kombu_compression                  = $::os_service_default,
+  $cache_backend                      = $::os_service_default,
   $memcache_servers                   = $::os_service_default,
+  $manage_backend_package             = true,
   $amqp_server_request_prefix         = $::os_service_default,
   $amqp_broadcast_prefix              = $::os_service_default,
   $amqp_group_request_prefix          = $::os_service_default,
@@ -357,6 +367,8 @@ class ceilometer(
   }
 
   oslo::cache { 'ceilometer_config':
-    memcache_servers => $memcache_servers,
+    backend                => $cache_backend,
+    memcache_servers       => $memcache_servers,
+    manage_backend_package => $manage_backend_package,
   }
 }

releasenotes/notes/add-more-oslo-cache-params-to-init-70207eea609cf621.yaml

@@ -0,0 +1,5 @@
+---
+features:
+  - |
+    Added cache_backend and manage_backend_package parameters to ceilometer
+    class that is passed down to the oslo::cache resource.

spec/classes/ceilometer_init_spec.rb

@@ -123,7 +123,11 @@ describe 'ceilometer' do
     end
 
     it 'configures cache backend' do
-      is_expected.to contain_ceilometer_config('cache/memcache_servers').with_value('<SERVICE DEFAULT>')
+      is_expected.to contain_oslo__cache('ceilometer_config').with(
+        :backend                => '<SERVICE DEFAULT>',
+        :memcache_servers       => '<SERVICE DEFAULT>',
+        :manage_backend_package => true,
+      )
     end
 
     context 'with rabbitmq durable queues configured' do
@@ -152,12 +156,18 @@ describe 'ceilometer' do
     context 'with overridden cache parameter' do
       before {
         params.merge!(
-          :memcache_servers => 'host1:11211,host2:11211',
+          :cache_backend          => 'memcache',
+          :memcache_servers       => 'host1:11211,host2:11211',
+          :manage_backend_package => false,
         )
       }
 
       it 'configures cache backend' do
-        is_expected.to contain_ceilometer_config('cache/memcache_servers').with_value('host1:11211,host2:11211')
+        is_expected.to contain_oslo__cache('ceilometer_config').with(
+          :backend                => 'memcache',
+          :memcache_servers       => 'host1:11211,host2:11211',
+          :manage_backend_package => false,
+        )
       end
     end