Apache and JBoss AS 5 HTTP cluster configuration

Required Components

• Apache 2.2.22
• Mod_jk 1.2.3
• JBOSS 5.1.0GA

Installation Steps

1. InstallApache2.2.22
2. Setmod_jk-1.2.30-httpd-2.2.3.soRenamemod_jk.so, Copy%APACH_HOME%/modules
3. Extractjboss 5.1.0.GA

Configuration

In%APACHE_HOME%\conf\http.confAdd the following content to the file:

LoadModule jk_module modules/mod_jk.so# Where to find workers.propertiesJkWorkersFile conf/workers.properties# where to find the log fileJkLogFile logs/mod_jk.log# set the log level  set the log levelJkLogLevel info    # map to the status serverJkMount /private/admin/mystatus mystatus# router the request to the right hostJkMount /* balance 

Then%APACHE_HOME%\conf\Createworkers.propertiesFile and add the following content:

# define list of workers that will be used# for mapping requestsworker.list=balance,mystatus# Define Node1worker.node1.port=8009worker.node1.host=xxx.xxx.xxx.xxxworker.node1.type=ajp13worker.node1.lbfactor=1worker.node1.socket_timeout=30worker.node1.socket_keepalive=1# Define Node2worker.node2.port=8009worker.node2.host=yyy.yyy.yyy.yyyworker.node2.type=ajp13worker.node2.lbfactor=1worker.node2.socket_timeout=30worker.node2.socket_keepalive=1# Load-balancing behaviourworker.balance.type=lbworker.balance.balance_workers=node1,node2worker.balance.sticky_session=1# Status worker for managing load balancerworker.mystatus.type=status

The above content is used to configure mod_jk so that it listens to two servlet containers (such as JBOSS instances) node1 and node2.

In node1, open%JBOSS_HOME%/server/all/deploy/jbossweb.sar/server.xml, ModifyEngineNode:

<Engine name="jboss.web" defaultHost="localhost" jvmRoute="node1">

Similarly, in node2EngineChange node:

<Engine name="jboss.web" defaultHost="localhost" jvmRoute="node2">

By default, JBOSS sessions are shared.

When deploying a Web applicationweb.xmlJoin<distributable/>Nodes:

<? Xml version = "1.0" encoding = "ISO-8859-1"?> <! DOCTYPE web-app PUBLIC "-// Sun Microsystems, Inc. // DTD Web Application 2.3 // "http://java.sun.com/dtd/web-app_2_3.dtd"> <web-app> <display-name> Welcome to JBoss </display-name> <description> Welcome to JBoss </description> <distributable/> <! --...... Other configurations --> </web-app>

Start Apache

Open the console and go%APACHE_HOME%Run the following command to start the Apache server:

httpd.exe -k start

Run the following command to disable the Apache server:

httpd.exe -k shutdown

Start JBOSS in cluster mode

The command to start JBOSS in cluster mode is as follows:

run -c all -g DocsPartition -u 239.255.100.100 -b 0.0.0.0 -Djboss.messaging.ServerPeerID=1

On other JBOSS instances of the cluster, modifyjboss.messaging.ServerPeerIDValue, which must be unique in the cluster.

Test

Createtest.warFolder.index.jspFile andWEB-INFFolder. InWEB-INFCreate a folder as shown in the preceding figureweb.xmlFile. Inindex.jspAdd the following content to the file:

<% @ Page language = "java" contentType = "text/html; charset = UTF-8" pageEncoding = "UTF-8" %> <! DOCTYPE html PUBLIC "-// W3C // dtd html 4.01 Transitional // EN" "http://www.w3.org/TR/html4/loose.dtd"> <% @ page import = "java. util. * "%> <% @ page import =" java.net. inetAddress; "%> 

Copy the folder to%JBOSS_HOME%/server/all/deployTo restart all JBOSS instances in a cluster.

Enterhttp://localhost:8080/test.

References

• UsingMod_jk1.2WithJBoss
• Testing Cluster Formation with JGroups