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Subject: mod_jk - load balancing
Date: Wed, 25 Apr 2007 14:56:02 +0200
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Thread-Topic: mod_jk - load balancing
Thread-Index: AceHORQjPMfsuCsPTzGp1Ue6OMBHKg==
From: "Gregor Novak" <Gregor.Novak@hermes-softlab.com>
To: <users@tomcat.apache.org>
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Hi all,

=20

I'm trying to configure mod_jk as load balancer and I was not so
successful so far.

=20

My environment architecture looks like this:

=20

2 servers running each 3 instances of JBoss/tomcat Aplication server
with ports 8080,8081 and 8082.

Into each server instance I add AJP 13 protocol like this:

=20

      <Connector port=3D"8003" address=3D"${jboss.bind.address}"

         emptySessionPath=3D"true" enableLookups=3D"false"
redirectPort=3D"8080"=20

         protocol=3D"AJP/1.3"/>

=20

redirectPort is set accordantly to the server instance.

=20

For now workes.properties file looks like this:

=20

worker.list=3Dworker1,worker2

=20

  # Set properties for worker1 (ajp13)

  worker.worker1.type=3Dajp13

  worker.worker1.host=3Dps1

  worker.worker1.port=3D8003

  worker.worker1.lbfactor=3D1

  worker.worker1.connection_pool_timeout=3D600

  worker.worker1.socket_keepalive=3D1

  worker.worker1.socket_timeout=3D60

=20

   # Set properties for worker3 (lb) which use worker1

  worker.worker2.balance_workers=3Dworker1

=20

ps1 is one of the above mention servers. And for now I'm only trying to
make it work one instance.

=20

Apache server, which should balance and forward all the requests coming
for servers, is set up on apache server located on another (3rd)machine.


Httpd.conf is set like this:

=20

# Load mod_jk module

# Update this path to match your modules location

LoadModule    jk_module  modules/mod_jk.so

# Where to find workers.properties

# Update this path to match your conf directory location (put
workers.properties next to httpd.conf)

JkWorkersFile conf/workers.properties

# Where to put jk shared memory

# Update this path to match your local state directory or logs directory

JkShmFile     logs/mod_jk.shm

# Where to put jk logs

# Update this path to match your logs directory location (put mod_jk.log
next to access_log)

JkLogFile     logs/mod_jk.log

# Set the jk log level [debug/error/info]

JkLogLevel    debug

# Select the timestamp log format

JkLogStampFormat "[%a %b %d %H:%M:%S %Y] "

=20

When I start Apache mod_jk is loading because log file is created, but
forward to application server is not working. I always get apache
response and not the tomcat services on production servers.=20

=20

What else should I add into configuration files to make this
configuration work.

=20

Thank you all for all your help

=20

Cheers=20

=20

Grega


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