________________________________
From: juergen.l...@it.nrw.de [mailto:juergen.l...@it.nrw.de]
Sent: Monday, July 06, 2009 5:29 PM
To: users@httpd.apache.org
Subject: [us...@httpd] mod_proxy_balance: route redirect not working
We use mod_proxy to distribute requests to four tomcat instances.
Our configuration (vhost.conf) is as follows:
<VirtualHost aa.bb.cc:3000>
ProxyPass /balancer-manager !
ProxyPass / balancer://mybalancer/ stickysession=JSESSIONID
<Proxy balancer://mybalancer>
BalancerMember ajp://xx.yy.zz:11009/ldsportal route=tomcat1
loadfactor=50
BalancerMember ajp://xx.yy.zz:12009/ldsportal route=tomcat2
loadfactor=50
BalancerMember ajp://xx.yy.zz:13009/ldsportal route=tomcat3
loadfactor=50
BalancerMember ajp://xx.yy.zz:13009/ldsportal route=tomcat4
loadfactor=50
</Proxy>
<Location /balancer-manager>
SetHandler balancer-manager
</Location>
</VirtualHost>
Things work fine this way, but occasionally, we have to shut down a
single instance for maintenance.
We use the balancer manager to reconfigure the respective worker (say:
tomcat1) to redirect to another worker:
- select the instance tomcat1 from the web GUI
http://aa.bb.cc:3000/balancer-manager
- enter e.g. tomcat2 in the "Route Redirect" form field.
- on submit, the respective worker is marked with "RouteRedir=tomcat2"
in the worker list.
Our problem is, requests without a session id still get routed to
worker tomcat1 (as well as to the other 3 instances).
We use [Server Version: Apache/2.2.3 (Linux/SUSE)] in our production
env, but I also tried [Server Version: Apache/2.2.11 (Win32)]
The result is the same in both setups.
Am I missing something essential?
You have to also "disable" the route that you are re-directing. AFAIK, it works
like this:
Disable only: labelled requests for that route get "server unavailable",
unlabelled requests will go to other routes.
Redirect only: labelled requests for that route get redirected, unlabelled
requests can go to any route, including this one (this is your case).
Redirect and disable: labelled requests for that route get redirected,
unlabelled requests will go to other routes.
Rgds,
Owen Boyle
Disclaimer: Any disclaimer attached to this message may be ignored.
Cheers
Jürgen
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