Warning: PDO::__construct(): php_network_getaddresses: getaddrinfo failed: Name or service not known in /var/www/html/vendor/zendframework/zendframework/library/Zend/Db/Adapter/Driver/Pdo/Connection.php on line 281

Fatal error: Uncaught exception 'PDOException' with message 'SQLSTATE[HY000] [2002] php_network_getaddresses: getaddrinfo failed: Name or service not known' in /var/www/html/vendor/zendframework/zendframework/library/Zend/Db/Adapter/Driver/Pdo/Connection.php:281 Stack trace: #0 /var/www/html/vendor/zendframework/zendframework/library/Zend/Db/Adapter/Driver/Pdo/Connection.php(281): PDO->__construct('mysql:dbname=kr...', 'kruds_user', 'ZjI5OTFhODAwZmM...', Array) #1 /var/www/html/vendor/zendframework/zendframework/library/Zend/Db/Adapter/Driver/Pdo/Pdo.php(244): Zend\Db\Adapter\Driver\Pdo\Connection->connect() #2 /var/www/html/vendor/zendframework/zendframework/library/Zend/Db/Sql/Sql.php(120): Zend\Db\Adapter\Driver\Pdo\Pdo->createStatement() #3 /var/www/html/vendor/zendframework/zendframework/library/Zend/Db/TableGateway/AbstractTableGateway.php(232): Zend\Db\Sql\Sql->prepareStatementForSqlObject(Object(Zend\Db\Sql\Select)) #4 /var/www/html/vendor/zendframework/zendframework/library/Zend/Db/TableGateway/AbstractTableGatew in /var/www/html/vendor/zendframework/zendframework/library/Zend/Db/Adapter/Driver/Pdo/Connection.php on line 289