Added nodepool::mysql class

- Created nodepool::mysql class, which includes mysql stuff from
  init.pp. This allows to host database on separated host than
  the one running nodepool.
- Discarded creation of 'max_connections.cnf' file. Instead,  use
  'max_connections' from '::mysql::server' config_hash/override_options.

Change-Id: Ic745875b69563ed3834e99533227ca3d1150156b

manifests/init.pp

@@ -38,41 +38,20 @@ class nodepool (
   $jenkins_masters = [],
   $build_workers = '1',
   $upload_workers = '4',
+  $install_mysql = true,
+  $mysql_db_name = 'nodepool',
+  $mysql_host = 'localhost',
+  $mysql_user_name = 'nodepool',
 ) {
 
-
-  $mysql_data = load_module_metadata('mysql', true)
-  if $mysql_data == {} {
-    class { '::mysql::server':
-      config_hash => {
-        'root_password'  => $mysql_root_password,
-        'default_engine' => 'InnoDB',
-        'bind_address'   => '127.0.0.1',
-      }
+  if($install_mysql) {
+    class { '::nodepool::mysql' :
+      mysql_db_name       => $mysql_db_name,
+      mysql_root_password => $mysql_root_password,
+      mysql_user_host     => $mysql_host,
+      mysql_user_name     => $mysql_user_name,
+      mysql_password      => $mysql_password,
     }
-  } else { # If it has metadata.json, assume it's new enough to use this interface
-    class { '::mysql::server':
-      root_password    => $mysql_root_password,
-      override_options => {
-        'mysqld' => {
-          'default-storage-engine' => 'InnoDB',
-        }
-      },
-    }
-  }
-
-  include ::mysql::server::account_security
-
-  mysql::db { 'nodepool':
-    user     => 'nodepool',
-    password => $mysql_password,
-    host     => 'localhost',
-    grant    => ['all'],
-    charset  => 'utf8',
-    require  => [
-      Class['mysql::server'],
-      Class['mysql::server::account_security'],
-    ],
   }
 
   $packages = [

manifests/mysql.pp

@@ -0,0 +1,50 @@
+# == Class: nodepool::mysql
+#
+class nodepool::mysql (
+  $mysql_password,
+  $mysql_root_password,
+  $mysql_bind_address     = '127.0.0.1',
+  $mysql_default_engine   = 'InnoDB',
+  $mysql_db_name          = 'nodepool',
+  $mysql_max_connections  = 8192,
+  $mysql_user_host        = 'localhost',
+  $mysql_user_name        = 'nodepool',
+) {
+
+  $mysql_data = load_module_metadata('mysql', true)
+  if ($mysql_data == {}) {
+    class { '::mysql::server' :
+      config_hash => {
+        'bind_address'    => $mysql_bind_address,
+        'default_engine'  => $mysql_default_engine,
+        'max_connections' => $mysql_max_connections,
+        'root_password'   => $mysql_root_password,
+      }
+    }
+  } else { # If it has metadata.json, assume it's new enough to use this interface
+    class { '::mysql::server' :
+      override_options => {
+        'mysqld' => {
+          'default-storage-engine' => $mysql_default_engine,
+          'max_connections'        => $mysql_max_connections,
+        }
+      },
+      root_password    => $mysql_root_password,
+    }
+  }
+
+  include ::mysql::server::account_security
+
+  mysql::db { $mysql_db_name :
+    user     => $mysql_user_name,
+    password => $mysql_password,
+    host     => $mysql_user_host,
+    grant    => ['all'],
+    charset  => 'utf8',
+    require  => [
+      Class['mysql::server'],
+      Class['mysql::server::account_security'],
+    ],
+  }
+
+}

templates/secure.conf.erb

@@ -1,5 +1,5 @@
 [database]
-dburi=mysql+pymysql://nodepool:<%= @mysql_password %>@localhost/nodepool
+dburi=mysql+pymysql://<%= @mysql_user_name %>:<%= @mysql_password %>@<%= @mysql_host %>/<%= @mysql_db_name %>
 
 <% @jenkins_masters.each do |master| -%>
 [jenkins "<%= master['name'] -%>"]