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Alexander Piavka <[EMAIL PROTECTED]>
10/23/2002 11:09 AM
Please respond to "Tomcat Users List"
To: Tomcat Users List <[EMAIL PROTECTED]>
cc:
Subject: load balancing with routing with mod_jk in cluster
Hi,
I have lvs cluster of 3 nodes, on each node i have apache1.3 +
tomcat4.1.12+mod_jk
serving identical data. The http service on lvs is configured with
persistent connection.
So in normal operation i want that apache on each node will route requests
to tomcat on the same node.
In addition if ,for example, i want to take down tomcat on one node, then
i would like that apache on the same node will start routing requrests to
the other two tomcats on the other nodes. Now if the tomcat comes back
then i would like to continue to route requests only with an old session
to to the other two tomcats.
How can i enable this with load balancing in mod_jk?
As i understand this can be done with setting local_worker=1 for all
tomcat workers or only for the local tomcat worker.
and how do i tell apache to forward the requests to load balancers
on the other two nodes? How apache knows what there are other two remote
load balancers, i.e should i somehow add them to local worker.properties?
what lbfactor values should i give to the local and remote tomcat workers?
How can i take down the tomcat cleanly, so that it goes down only
after all old sessions to it end. As i have read in Workers HowTo
this can be done with some special port if i set local_worker_only=1 for
the load balancer worker, but how i switch this port off before shuting
down tomcat? Or the old sessions can be just routed to another
load balancers. If so then how?
Thanks a lot
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