Add processing delay param for metricd

Closes-bug: #1722788

Change-Id: I6f2d6835967a21e266243b66e36ed2690350d819

manifests/metricd.pp

@@ -19,16 +19,21 @@
 #   cleaning of expired data.
 #   Defaults to $::os_service_default
 #
+# [*metric_processing_delay*]
+#   (optional) Delay between processng metrics
+#   Defaults to $::os_service_default.
+#
 # [*manage_service*]
 #   (optional) Whether the service should be managed by Puppet.
 #   Defaults to true.
 #
 class gnocchi::metricd (
-  $manage_service = true,
-  $enabled        = true,
-  $workers        = $::os_workers,
-  $cleanup_delay  = $::os_service_default,
-  $package_ensure = 'present',
+  $manage_service          = true,
+  $enabled                 = true,
+  $workers                 = $::os_workers,
+  $metric_processing_delay = $::os_service_default,
+  $cleanup_delay           = $::os_service_default,
+  $package_ensure          = 'present',
 ) inherits gnocchi::params {
 
   include ::gnocchi::deps
@@ -36,6 +41,7 @@ class gnocchi::metricd (
   gnocchi_config {
     'metricd/workers':              value => $workers;
     'metricd/metric_cleanup_delay': value => $cleanup_delay;
+    'metricd/metric_processing_delay': value => $metric_processing_delay;
   }
 
   package { 'gnocchi-metricd':

releasenotes/notes/add-metricd-processing-delay-76c234b0727f092a.yaml

@@ -0,0 +1,4 @@
+---
+fixes:
+  - |
+    Expose metricd processing delay to be set in gnocchi config metricd section.

spec/classes/gnocchi_metricd_spec.rb

@@ -66,6 +66,16 @@ describe 'gnocchi::metricd' do
       end
     end
 
+    context 'with metric delay set' do
+      before do
+        params.merge!({
+          :metric_processing_delay => 15 })
+      end
+      it 'configures gnocchi metricd processing delay value' do
+        is_expected.to contain_gnocchi_config('metricd/metric_processing_delay').with_value('15')
+      end
+    end
+
     context 'with cleanup_delay set' do
       before do
         params.merge!({