Hi,

Is it possible to use value returned from RewriteMap external program
in ProxyPass Directive ? We want use apache loadbalancing feature and
send request to different set of machines depending on the value
returned by RewriteMap.

Basically RewriteMap program will return cluster value( 1, 2 or 3) and
depending on value it returned request should go to that particular
cluster. ( either cluster1 , cluster2 or cluster3). Pasted config
lines for reference. Config doesn't work and I get following error
message

[Tue Jul 15 16:10:22 2008] [debug] mod_proxy_balancer.c(42): proxy:
BALANCER: canonicalising URL //mycluster${lb:$1}/
[Tue Jul 15 16:10:22 2008] [debug] mod_proxy_balancer.c(914): proxy:
Entering byrequests for BALANCER (balancer://mycluster${lb:$1})
[Tue Jul 15 16:10:22 2008] [error] proxy: BALANCER:
(balancer://mycluster${lb:$1}). All workers are in error state

httpd.conf

RewriteEngine on
RewriteMap lb prg:/home/loadbalancer/program.pl

ProxyPass / balancer://mycluster${lb:$1}/ nofailover=Off

<Proxy balancer://mycluster1>
  BalancerMember http://192.168.10.6:8001/
  ProxySet lbmethod=byrequests
</Proxy>
<Proxy balancer://mycluster2>
  BalancerMember http://192.168.10.6:8002/
  ProxySet lbmethod=byrequests
</Proxy>
<Proxy balancer://mycluster3>
  BalancerMember http://192.168.10.6:8003/
  ProxySet lbmethod=byrequests
</Proxy>

--
Regards
Nitesh

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