Add mysql_enable_ndb option

Add mysql_enable_ndb parameter to select mysql storage engine.

Change-Id: I24ce322aa209985ff9cf591dca9572521b71fb78
Depends-On: https://review.opendev.org/#/c/748067
Closes-Bug: #1892952

manifests/db.pp

@@ -49,6 +49,11 @@
 #   (Optional) If set, use this value for pool_timeout with SQLAlchemy.
 #   Defaults to $::os_service_default
 #
+# [*mysql_enable_ndb*]
+#   (Optional) If True, transparently enables support for handling MySQL
+#   Cluster (NDB).
+#   Defaults to $::os_service_default
+#
 class placement::db (
   $database_sqlite_synchronous = $::os_service_default,
   $database_connection         = 'sqlite:////var/lib/placement/placement.sqlite',
@@ -61,6 +66,7 @@ class placement::db (
   $database_connection_debug   = $::os_service_default,
   $database_connection_trace   = $::os_service_default,
   $database_pool_timeout       = $::os_service_default,
+  $mysql_enable_ndb            = $::os_service_default,
 ) {
 
   include placement::deps
@@ -82,5 +88,6 @@ class placement::db (
     connection_debug   => $database_connection_debug,
     connection_trace   => $database_connection_trace,
     pool_timeout       => $database_pool_timeout,
+    mysql_enable_ndb   => $mysql_enable_ndb,
   }
 }

releasenotes/notes/add_mysql_enable_ndb-option-b87ddc254a53561a.yaml

@@ -0,0 +1,4 @@
+---
+features:
+  - |
+    Add mysql_enable_ndb parameter to select mysql storage engine.

spec/classes/placement_db_spec.rb

@@ -21,6 +21,7 @@ describe 'placement::db' do
         :connection_debug   => '<SERVICE DEFAULT>',
         :connection_trace   => '<SERVICE DEFAULT>',
         :pool_timeout       => '<SERVICE DEFAULT>',
+        :mysql_enable_ndb   => '<SERVICE DEFAULT>',
       )}
     end
 
@@ -38,6 +39,7 @@ describe 'placement::db' do
           :database_connection_debug   => '100',
           :database_connection_trace   => true,
           :database_pool_timeout       => '10',
+          :mysql_enable_ndb            => true,
         }
       end
 
@@ -59,6 +61,7 @@ describe 'placement::db' do
         :connection_debug   => '100',
         :connection_trace   => true,
         :pool_timeout       => '10',
+        :mysql_enable_ndb   => true,
       )}
     end
   end