Reduce number of workers to 2 when possible

Reducing workers will help us to consume less memory reduce the number
of timeouts we have in upstream CI.

* Neutron & Swift: reduce from 4 to 2 workers
* When possible, set workers to 2: aodh, ceilometer, gnocchi.

Change-Id: Ie064a9ad0389f112bbb69f4253f7f6dbc26deb0a

manifests/aodh.pp

@@ -44,7 +44,8 @@ class openstack_integration::aodh {
     service_name          => 'httpd',
   }
   class { '::aodh::wsgi::apache':
-    ssl => false,
+    workers => 2,
+    ssl     => false,
   }
   class { '::aodh::auth':
     auth_url      => 'http://127.0.0.1:5000/v2.0',

manifests/ceilometer.pp

@@ -41,9 +41,13 @@ class openstack_integration::ceilometer {
     ssl     => false,
     workers => '2',
   }
-  class { '::ceilometer::collector': }
+  class { '::ceilometer::collector':
+    collector_workers => '2',
+  }
   class { '::ceilometer::expirer': }
-  class { '::ceilometer::agent::notification': }
+  class { '::ceilometer::agent::notification':
+    notification_workers => '2',
+  }
   class { '::ceilometer::agent::polling': }
   class { '::ceilometer::agent::auth':
     auth_password => 'a_big_secret',

manifests/gnocchi.pp

@@ -23,7 +23,8 @@ class openstack_integration::gnocchi {
     }
     include ::apache
     class { '::gnocchi::wsgi::apache':
-      ssl => false,
+      workers => 2,
+      ssl     => false,
     }
     class { '::gnocchi::client': }
     class { '::gnocchi::db::sync': }

manifests/neutron.pp

@@ -36,7 +36,8 @@ class openstack_integration::neutron {
     auth_password       => 'a_big_secret',
     identity_uri        => 'http://127.0.0.1:35357/',
     sync_db             => true,
-    api_workers         => 4,
+    api_workers         => 2,
+    rpc_workers         => 2,
   }
   class { '::neutron::plugins::ml2':
     type_drivers         => ['vxlan'],

manifests/swift.pp

@@ -6,7 +6,7 @@ class openstack_integration::swift {
   }
   class { '::swift::proxy':
     proxy_local_net_ip => '127.0.0.1',
-    workers            => '4',
+    workers            => '2',
     pipeline           => [
   'catch_errors', 'healthcheck', 'cache', 'tempurl', 'ratelimit',
   'authtoken', 'keystone', 'formpost', 'staticweb', 'container_quotas',