I'm playing around with LVS and am just wondering the gotchas others have from experience. I have HW LB experience, this is for fun and prob will test with some websites, but even gotchas for high traffic sites would be interesting.
Hmm thats a hard one because LVS is so simple and easy to setup.
The only gotcha I can think of is you are using stateful connections through the VIP to the backend servers, ipvsadm has a timeout value of which I think the default is 300 seconds. We only noticed this when our programmers were SSHing via the VIP and their SSH connection would drop after this timeout value. The solution was to increase the timeout value to a larger value.