Error

php_network_getaddresses: getaddrinfo for travelspirit-mysql-mysql-1.travelspirit-mysql-mysql.travelspirit-db-mysql.svc.cluster.local failed: Name or service not known
#0 /var/www/html/core/frameworks/PEAR-PHP7/MDB2/Driver/mysqli.php(546): mysqli_real_connect(Object(mysqli), 'travelspirit-my...', 'snapshot_user', 'YshGDlbiwsP4Fsa...', 'travelspirit_sn...', '3306', '')
#1 /var/www/html/core/frameworks/PEAR-PHP7/MDB2/Driver/mysqli.php(587): MDB2_Driver_mysqli->_doConnect('snapshot_user', 'YshGDlbiwsP4Fsa...')
#2 /var/www/html/core/frameworks/PEAR-PHP7/MDB2.php(411): MDB2_Driver_mysqli->connect()
#3 /var/www/html/core/frameworks/PEAR-PHP7/LiveUser/Admin/Storage/MDB2.php(129): MDB2::connect('mysqli://snapsh...', Array)
#4 /var/www/html/core/frameworks/PEAR-PHP7/LiveUser/Admin/Auth/Storage/MDB2.php(97): LiveUser_Admin_Storage_MDB2->init(Array, Array)
#5 /var/www/html/core/frameworks/PEAR-PHP7/LiveUser.php(642): LiveUser_Admin_Auth_Storage_MDB2->init(Array, Array)
#6 /var/www/html/core/frameworks/PEAR-PHP7/LiveUser/Admin/Auth/Common.php(185): LiveUser::storageFactory(Array, 'LiveUser_Admin_...')
#7 /var/www/html/core/frameworks/PEAR-PHP7/LiveUser.php(571): LiveUser_Admin_Auth_Common->init(Array, 'liveuserdb')
#8 /var/www/html/core/frameworks/PEAR-PHP7/LiveUser/Admin.php(292): LiveUser::authFactory(Array, 'liveuserdb', 'LiveUser_Admin_')
#9 /var/www/html/core/frameworks/PEAR-PHP7/LiveUser/Admin.php(397): LiveUser_Admin->setAdminAuthContainer('liveuserdb')
#10 /var/www/html/core/includes/classes/AccessControl.class.php(33): LiveUser_Admin->init()
#11 /var/www/html/core/includes/classes/AccessControl.class.php(40): AccessControl->__construct()
#12 /var/www/html/core/includes/classes/AdminControl.class.php(81): AccessControl::singleton()
#13 /var/www/html/admin.php(50): AdminControl->__construct()
#14 {main}