Different MySQL usernames in multi server setup
This tutorial will not work http://www.howtoforge.com/installing-a-web-email-and-mysql-database-cluster-on-debian-5.0-with-ispconfig-3. And even if the shared MySQL data directory is not used, but instead MySQL master-master replication (just like in tutorial with dbispconfig1 and dbispconfig2) it will not work either. The problem is that, the both ISPconfig server requires valid MySQL user with same username ISPConfig and access to different databases (dbispconfig1 and dbispconfig2). So when you install slave server, password for the master server of MySQL ISPconfig user is changed. It would be a great feature if ISPConfig installer would create different usernames for database, based on server id. If server id = 1 the username = dbispconfig1 and so on. The main advantage of this feature would be, that you always have real time replications of both ISPConfig server databases including dbispconfig database.