Add support for configuring provider drivers

Add support for configuring Octavia's load balancer provider drivers.

Change-Id: I30a070b3c68d11792b499ffe315e89cb082c1929

manifests/api.pp

@@ -55,6 +55,14 @@
 #   (optional) Run octavia-db-manage upgrade head on api nodes after installing the package.
 #   Defaults to false
 #
+# [*default_provider_driver*]
+#   (optional) Configure the default provider driver.
+#   Defaults to $::os_service_default
+#
+# [*provider_drivers*]
+#   (optional) Configure the loadbalancer provider drivers.
+#   Defaults to $::os_service_default
+#
 class octavia::api (
   $enabled                        = true,
   $manage_service                 = true,
@@ -68,12 +76,18 @@ class octavia::api (
   $api_v2_enabled                 = $::os_service_default,
   $allow_tls_terminated_listeners = $::os_service_default,
   $sync_db                        = false,
+  $default_provider_driver        = $::os_service_default,
+  $provider_drivers               = $::os_service_default,
 ) inherits octavia::params {
 
   include ::octavia::deps
   include ::octavia::policy
   include ::octavia::db
 
+  if !is_service_default($provider_drivers) {
+      validate_hash($provider_drivers)
+  }
+
   if $auth_strategy == 'keystone' {
     include ::octavia::keystone::authtoken
   }
@@ -125,6 +139,8 @@ class octavia::api (
     'api_settings/api_v1_enabled':                 value => $api_v1_enabled;
     'api_settings/api_v2_enabled':                 value => $api_v2_enabled;
     'api_settings/allow_tls_terminated_listeners': value => $allow_tls_terminated_listeners;
+    'api_settings/default_provider_driver':        value => $default_provider_driver;
+    'api_settings/enabled_provider_drivers':       value => $provider_drivers;
   }
 
 }

releasenotes/notes/add-provider-driver-config-9f5352879efe3f9d.yaml

@@ -0,0 +1,6 @@
+---
+features:
+  - |
+    Added octavia::api::provider_drivers and
+    octavia::api::default_provider_driver configuration to support configuring
+    different load balancer drivers in octavia.

spec/classes/octavia_api_spec.rb

@@ -11,6 +11,8 @@ describe 'octavia::api' do
       :api_v1_enabled                 => true,
       :api_v2_enabled                 => true,
       :allow_tls_terminated_listeners => false,
+      :default_provider_driver        => 'ovn',
+      :provider_drivers               => { 'amphora' => 'Octavia Amphora Driver', 'ovn' => 'Octavia OVN driver' }
     }
   end
 
@@ -49,6 +51,8 @@ describe 'octavia::api' do
         is_expected.to contain_octavia_config('api_settings/api_v1_enabled').with_value('<SERVICE DEFAULT>')
         is_expected.to contain_octavia_config('api_settings/api_v2_enabled').with_value('<SERVICE DEFAULT>')
         is_expected.to contain_octavia_config('api_settings/allow_tls_terminated_listeners').with_value('<SERVICE DEFAULT>')
+        is_expected.to contain_octavia_config('api_settings/default_provider_driver').with_value('<SERVICE DEFAULT>')
+        is_expected.to contain_octavia_config('api_settings/enabled_provider_drivers').with_value('<SERVICE DEFAULT>')
       end
       it 'does not sync the database' do
         is_expected.not_to contain_class('octavia::db::sync')
@@ -62,6 +66,8 @@ describe 'octavia::api' do
       is_expected.to contain_octavia_config('api_settings/api_v1_enabled').with_value( params[:api_v1_enabled] )
       is_expected.to contain_octavia_config('api_settings/api_v2_enabled').with_value( params[:api_v2_enabled] )
       is_expected.to contain_octavia_config('api_settings/allow_tls_terminated_listeners').with_value( params[:allow_tls_terminated_listeners] )
+      is_expected.to contain_octavia_config('api_settings/default_provider_driver').with_value( params[:default_provider_driver] )
+      is_expected.to contain_octavia_config('api_settings/enabled_provider_drivers').with_value( params[:provider_drivers] )
     end
 
     [{:enabled => true}, {:enabled => false}].each do |param_hash|