Load Balancing with IPVS

[msmart]

I am trying to setup a KVM virtual machine to act as a load balancer. I have installed and configured IPVS and Piranha on a RHEL 6 guest but it fails to forward requests to the "real servers". Logs only say: nanny[1917]: READ to SERVERORT timed out. I assume that routing is the issue here but have no idea where to start looking for the solution. Anyone gotten LVS nodes running on virtual machines before?

Thanks,

 

[e100]

I've used heartbeat + ldirectord in NAT mode for load balancers under debian squeeze inside a KVM VM on Proxmox.
Also used virtual IP addresses with hearbeat and Nginx on two KVM VMs as an HA reverse proxy.

Your problem is not Proxmox/KVM.

Did you enable IP forwarding in /etc/sysctl.conf?

 

[msmart]

I think you are correct that this is not a vm issue. Went back to basics and performed a test by balancing port 80 and it worked just fine. I am trying to load balance a pool of DNS servers and it is failing on port 53 for some reason. I have deployed dozens of LVS instances in the last couple years but this is the first DNS load balancer I have ever tried. Maybe there is something special about port 53 or dns traffic in general? Just odd.