decouple mysql setup from gerrit module

This commit moves the MySQL configuration from the gerrit puppet
module into a seperate mysql puppet module.  The purpose of
this change is to allow us to more easily customise gerrit's
mysql configuration for each instance of gerrit that we deploy..

Partial-Bug: 1083101
Change-Id: Ibcc31b3fce8af54229fd4de69a49842ac1c428ae

manifests/init.pp

@@ -67,8 +67,6 @@
 #
 class gerrit(
   $war = '',
-  $mysql_password = '',
-  $mysql_root_password = '',
   $email_private_key = '',
   $vhost_name = $::fqdn,
   $canonicalweburl = "https://${::fqdn}/",
@@ -241,29 +239,6 @@ class gerrit(
     require => File['/home/gerrit2/review_site/etc'],
   }
 
-  # Set up MySQL.
-
-  class { 'mysql::server':
-    config_hash => {
-      'root_password'  => $mysql_root_password,
-      'default_engine' => 'InnoDB',
-      'bind_address'   => '127.0.0.1',
-    }
-  }
-  include mysql::server::account_security
-
-  mysql::db { 'reviewdb':
-    user     => 'gerrit2',
-    password => $mysql_password,
-    host     => 'localhost',
-    grant    => ['all'],
-    charset  => 'latin1',
-    require  => [
-      Class['mysql::server'],
-      Class['mysql::server::account_security'],
-    ],
-  }
-
   # Set up apache.
 
   apache::vhost { $vhost_name:

manifests/mysql.pp

@@ -0,0 +1,32 @@
+# == Class: gerrit::mysql
+#
+class gerrit::mysql(
+  $mysql_root_password = '',
+  $database_name = '',
+  $database_user = '',
+  $database_password = '',
+) {
+
+  class { 'mysql::server':
+    config_hash => {
+      'root_password'  => $mysql_root_password,
+      'default_engine' => 'InnoDB',
+      'bind_address'   => '127.0.0.1',
+    }
+  }
+  include mysql::server::account_security
+
+  mysql::db { $database_name:
+    user     => $database_user,
+    password => $database_password,
+    host     => 'localhost',
+    grant    => ['all'],
+    charset  => 'latin1',
+    require  => [
+      Class['mysql::server'],
+      Class['mysql::server::account_security'],
+    ],
+  }
+}
+
+# vim:sw=2:ts=2:expandtab:textwidth=79