Add service workers API config option

Add a service_workers config option to set the number of Manila API
processes. By default, the value is set to ::os_workers.

Change-Id: I6c5a843b0ef84aecd1262613551a4b4ea933a0ab

manifests/api.pp

@@ -56,6 +56,10 @@
 #   (optional) Defines the enabled share protocols provided by Manila.
 #   Defaults to $::os_service_default
 #
+# [*service_workers*]
+#   (optional) Number of manila-api workers
+#   Defaults to $::os_workers
+#
 # === DEPRECATED PARAMTERS
 #
 # [*service_port*]
@@ -75,6 +79,7 @@ class manila::api (
   $ratelimits_factory           = 'manila.api.v1.limits:RateLimitingMiddleware.factory',
   $enable_proxy_headers_parsing = $::os_service_default,
   $enabled_share_protocols      = $::os_service_default,
+  $service_workers              = $::os_workers,
   # Deprecated
   $service_port                 = undef,
 ) {
@@ -126,6 +131,7 @@ class manila::api (
     'DEFAULT/osapi_share_listen':      value => $bind_host;
     'DEFAULT/enabled_share_protocols': value => $enabled_share_protocols;
     'DEFAULT/default_share_type':      value => $default_share_type;
+    'DEFAULT/osapi_share_workers':     value => $service_workers;
   }
 
   oslo::middleware { 'manila_config':

releasenotes/notes/add_service_workers_option-1c0728975b024eac.yaml

@@ -0,0 +1,3 @@
+---
+features:
+  - Add service_workers option to configure the number of API workers

spec/classes/manila_api_spec.rb

@@ -33,6 +33,7 @@ describe 'manila::api' do
       is_expected.to_not contain_manila_config('DEFAULT/os_region_name')
       is_expected.to contain_manila_config('oslo_middleware/enable_proxy_headers_parsing').with_value('<SERVICE DEFAULT>')
       is_expected.to contain_manila_config('DEFAULT/default_share_type').with(:value => '<SERVICE DEFAULT>')
+      is_expected.to contain_manila_config('DEFAULT/osapi_share_workers').with(:value => '2')
     end
 
     it 'should run db sync' do
@@ -62,6 +63,17 @@ describe 'manila::api' do
     end
   end
 
+  describe 'with service workers' do
+    let :params do
+      req_params.merge({'service_workers' => '4'})
+    end
+    it 'should configure the share workers' do
+      is_expected.to contain_manila_config('DEFAULT/osapi_share_workers').with(
+        :value => '4'
+      )
+    end
+  end
+
   describe 'with only required params' do
     let :params do
       req_params.merge({'bind_host' => '192.168.1.3'})