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Loadbalancing with the Linux firewall

Anyone has experience with the clusterip extension?

   
2:48 pm on May 16, 2010 (gmt 0)

WebmasterWorld Senior Member lammert is a WebmasterWorld Top Contributor of All Time 10+ Year Member Top Contributors Of The Month



While digging through the Linux iptables firewall documentation I stumbled upon the clusterip extension. In short this extension of the firewall allows you to setup a number of servers on the same IP and MAC address working as a load balancing cluster. The difference with normal load balancing clusters is that no dedicated hardware load balancer is necessary to route the packets to one of the servers. The servers themselves decide which traffic to respond to. To do this the clusterip module in the firewall of each of the servers decides if it will respond to incomming traffic based on the source IP and/or the source Port number.

This seems to be a very cheap way to implement load balancing. No external hardware is needed, only a software configuration.

Has anyone used clusterip load balancing in practice? It would be good to hear some experiences about quality of balancing, etc.
10:54 pm on May 17, 2010 (gmt 0)

WebmasterWorld Administrator coopster is a WebmasterWorld Top Contributor of All Time 10+ Year Member



Doesn't look like it lammert. Looks like once again you may be breaking ground and letting the rest of us know how it works out for you ;)
4:44 am on May 18, 2010 (gmt 0)

WebmasterWorld Senior Member lammert is a WebmasterWorld Top Contributor of All Time 10+ Year Member Top Contributors Of The Month



I would like to try it actually, but to implement it I need at least two spare Linux boxes on the same subnet. Don't have them at the moment here. But it may be possible to setup a test suite with a few Linux virtual machines running on my laptop.
 

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