mysql - SQLSTATE[HY000] [2002] php_network_getaddresses: getaddrinfo failed: Name or service not known -

i download https://github.com/luciddreamz/laravel laravel openshift upload on repository on github . code connect database not work. problem load variable .env file locate in root of project

for solve problem change.env

# local environment #   production, see .openshift/.env  app_env=application_env app_debug=true app_url=openshift_app_dns app_key=openshift_secret_token  db_driver=mysql db_host=openshift_mysql_db_host db_port=openshift_mysql_db_port db_database=openshift_app_name db_username=openshift_mysql_db_username  db_password=openshift_mysql_db_password  cache_driver=apc session_driver=file 

my error :sqlstate[hy000] [2002] php_network_getaddresses: getaddrinfo failed: name or service not known

createconnection('mysql:host=openshift_mysql_db_host;port=openshift_mysql_db_port;dbname=openshift_app_name',  array('driver' => 'mysql',        'host' => 'openshift_mysql_db_host',        'port' => 'openshift_mysql_db_port',        'database' => 'openshift_app_name',        'username' => 'openshift_mysql_db_username',        'password' => 'openshift_mysql_db_password',        'charset' => 'utf8',         'collation' => 'utf8_unicode_ci',        'prefix' => '',        'strict' => false,        'name' => 'mysql'),  array('0', '2', '0', false, '0')) in mysqlconnector.php line 20 

first line of error message describes error type: "pdoexception". next line displays pdo::errorinfo, i.e:

1. sqlstate error code (a 5 characters alphanumeric identifier defined in ansi sql standard).
2. driver-specific error code.
3. driver-specific error message.

• "hy000" general server error (see server error codes , messages in mysql docs).
• "2002" mysql client error code meaning "can't connect local mysql server through socket" (see (client error codes , messages in mysql docs).
• the driver specific error code , message ("php_network_getaddresses: getaddrinfo failed: name or service not known") tell pdo not able resolve host name.

the stack trace attached, line 3, reveals did not specify database connection parameters in configuration file. error show when test on local, right? need update /.env actual database connection parameters.