disable ceilometer events when using gnocchi as backend

Change-Id: I0b9adc6a2ea8d5973c71152dd5d5efa3bbacf2a6

files/event_pipeline.yaml

@@ -0,0 +1,3 @@
+---
+sources: []
+sinks: []

recipes/gnocchi_configure.rb

@@ -77,6 +77,16 @@ cookbook_file File.join(node['openstack']['telemetry-metric']['conf_dir'], 'api-
   mode 0o0640
 end
 
+# drop event_pipeline.yaml to ceilometer folder (gnocchi does not use events and
+# the default event_pipeline.yaml will lead to a queue "event.sample" in rabbit
+# without a consumer)
+cookbook_file File.join(node['openstack']['telemetry']['conf_dir'], 'event_pipeline.yaml') do
+  source 'event_pipeline.yaml'
+  owner node['openstack']['telemetry']['user']
+  group node['openstack']['telemetry']['group']
+  mode 0o0640
+end
+
 if node['openstack']['telemetry-metric']['conf']['storage']['driver'] == 'file'
   # default store is file, so create needed directories with correct permissions
   # (on ubuntu they are created by the package, but owned by root and not writable

spec/gnocchi_configure_spec.rb

@@ -82,6 +82,16 @@ describe 'openstack-telemetry::gnocchi_configure' do
         )
     end
 
+    it do
+      expect(chef_run).to create_cookbook_file('/etc/ceilometer/event_pipeline.yaml')
+        .with(
+          source: 'event_pipeline.yaml',
+          owner: 'ceilometer',
+          group: 'ceilometer',
+          mode: 0o0640
+        )
+    end
+
     %w(tmp measure cache).each do |dir|
       describe "gnocchi #{dir} dir" do
         context 'file as storage backend' do