Just looking for a direction to go. There are several HA/load-balancing packages for Ubuntu 10.04 and I'm not sure which one to use. Here is my scenario:
Using Postfix for smtp, dovecot for pop/imap.
In normal operation I want one server to respond to smtp and the other to pop/imap.
If any server fails I want the other to respond to both smtp and pop/imap.
WHICH LOAD BALANCER/HA PACKAGE SHOULD I USE?
Looking for one that is the easiest to set up while still allowing different routing depending on incoming port.
I have file replication already set up, I'm using gluster. This will replicate the email files between servers.
MySQL is a separate server that we are already using for our production postfix/dovecot authentication. WWW is also a separate server we're using for our webmail/postfixadmin service, using the aforementioned MySQL server.