@till When at MySQL master server on slave DNS server, it fills the SQL port @ Hostname... Code: Operating System: Ubuntu 16.04.3 LTS (Xenial Xerus) This application will update ISPConfig 3 on your server. Shall the script create a ISPConfig backup in /var/backup/ now? (yes,no) [yes]: Creating backup of "/usr/local/ispconfig" directory... Creating backup of "/etc" directory... MySQL master server hostname [3306]: MySQL master server port []: MySQL master server root username [root]:
Please take a look at the file /usr/local/ispconfig/server/lib/config.inc.php on the slave nodes, it might be that this settings is empty now: $conf['dbmaster_host'] = 'master.yourdomain.tld'; if that's the case, then please set the hostname of the master there again. I released a bugfix 3.1.8p1 version already which solves the original problem, but you'll have to set that hostname in the file again manually if it's empty. There is no need to install the patch release, it just fixes the typo in the updater.