[users@httpd] Mod_proxy_loadbalance- can/will it do persistence with headers?

[David Craigon <da...@griffin.com>]

Hi there,
	I'm writing to ask about the new mod_proxy_loadbalance in the
2.1 series. I'm interested in persistence with load balancing. I'm
looking for a feature that does something like a proprietary load
balancer I have used.

Here is the feature: All HTTP traffic is load balanced over a series of
real servers. The user just sees an IP address on the load balancer. So
far, so standard.

What this load balancer does is that it inserts a cookie in the header
of all outgoing traffic. It then strips this cookie on the way in, then
redirects the traffic to the same web server as the one it had before,
based on what was in the cookie. That way it can maintain persistence.

Now the Linux Virtual Server project load balancing doesn't open the
packets at all, so my mind turned to http proxy software. Is it possible
(maybe using mod_headers, or even working with mod_perl and writing
handlers) to do something like this?

Alternatively can anyone suggest an FOSS way of doing what I want?

Thanks in advance,
	David

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