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Chapter 10. Load Balancing Demonstration
The JBoss HTTP Connector includes a load balancing demonstration to show how different server-side scenarios affect the client request routing performed by the load balancing proxy server. The required configuration is located in the
jboss-eap-5.1/mod_cluster/demo
directory.
The application consists of two primary components:
-
/server/load-demo.war
- A WAR file to be deployed in JBoss Enterprise Application Platform or JBoss Enterprise Web Server. This WAR includes a number of servlets.
-
/client/lib/mod-cluster-demo.jar
- A web application that lets users launch a pool of threads, which send requests through the load balancer to
load-demo.war
's primary servlet. The application displays information about which servers are handling the requests. It can also send separate requests toload-demo.war
's load generation servlets, allowing the user to see how certain load conditions affect request load balancing.
The demo can be used to demonstrate how different worker-side scenarios impact the routing decisions of the proxy server.
Note
The demo does not show the maximum load a cluster configuration can handle.
10.1. Set up the Demonstration
The following procedure summarizes how set up and start the demonstration. These steps will then be explained in further detail. Once the demo is running, refer to Section 10.3, “Interact with the Demonstration”.
Task: Start the Demo
Complete this task to set up the base requirements of the demonstration.
Prerequisites
- Install and Configure the Worker Node. Refer to Section 7.2, “Install and Configure a Worker Node”
- Install and Configure the Proxy Server. Refer to Section 9.1, “Static Proxy Configuration”
Start the Proxy Server
Navigate toHTTPD_DIST/sbin
and start the proxy server.[sbin]$ apachectl start
Start the Worker Node
In a terminal, execute the following command:- For JBoss Enterprise Web Server:
[home]$ ./JBOSS_EWS_DIST/tomcat6/bin/startup.sh
- For JBoss Enterprise Application Platform:
[home]$ ./JBOSS_EAP_DIST/bin/run.sh
Specify the Catalina Service Name
AWAITING CONFIRMATON ON JBPAPP-6550Deploy Demo Web Archive to Worker Node
Copyload-demo.war
fromJBOSS-EAP_DIST/mod_cluster/demo/server
into one of the following directories:- For JBoss Enterprise Web Server:
JBOSS_EWS_DIST/tomcat6/webapps
- For JBoss Enterprise Application Platform:
JBOSS_EAP_DIST/jboss-as/server/PROFILE/deploy
Start the Demonstration
Navigate toJBOSS_EAP_DIST/mod_cluster/demo/client/
, and start the demonstration.[client]$ ./run-demo.sh
ResultThe demonstration starts, and the Load Balancing Demonstration window opens. Proceed to Task: Configure Client Control Tab Fields