Load Balancing in JBoss

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Configure Load Balancing in JBoss

Use run.sh -b <ip> to run instances on different IPs but same ports Define it in workers.properties:

worker.jboss2.type=ajp13

worker.jboss2.host=192.168.1.180

worker.jboss2.port=8009

 

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Define a new load balancing worker:

worker.jboss.type=lb

worker.jboss.balance_workers=jboss1,jboss2

Export the load balancing worker:

worker.list=jboss,jkstatus

The updated <apache-dir>/conf/workers.properties looks something like:

worker.jboss1.type=ajp13

worker.jboss1.host=127.0.0.1

worker.jboss1.port=8009

worker.jboss2.type=ajp13

worker.jboss2.host=192.168.1.180

worker.jboss2.port=8009

worker.jboss.type=lb

worker.jboss.balance_workers=jboss1,jboss2

worker.jkstatus.type=status

worker.list=jboss,jkstatus

Deploy session-test.war to both instances, and update SessionTest.jsp on the second so that its page heading and bgcolor are different (e.g. Server 2, lime)

Change/add in conf/jk.conf:

JkMount  /jmx-console  jboss

JkMount  /jmx-console/*  jboss

JkMount  /session-test  jboss

JkMount  /session-test/* jboss

Start both JBoss instances (on local and public IPs) and restart Apache HTTPD Test http://localhost/session-test/ The updated <apache-dir>/conf/jk.conf looks something like:

LoadModule    jk_module  <path_to_modules>/mod_jk.so

JkWorkersFile <path_to_conf>/workers.properties

JkLogFile     <path_to_logs>/jk.log

JkLogLevel    info

JkMount       /jmx-console jboss

JkMount       /jmx-console/* jboss

JkMount       /session-test jboss

JkMount       /session-test/* jboss

JkMount       /jkstatus jkstatus

Observe that we are no longer JkMount-ing jboss1 (or jboss2). We can only use the new load balancer worker called jboss because that is the one exported by worker.list inconf/worker.properties. What happens to "Session Counter" when accessed through http://localhost/session-test/? How about when you access the session-test/ directly, but going tohttp://localhost:8080/session-test/?

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