Below is an overview of how to configure two instances of Tomcat with loadbalancer to utilize port 40. This will allow you to not have to add 8080 when typing in your URL.
Tomcat 4.1.24 w/ Java Development
Kit (JDK) 1.3.1_08
1. Download 2 files to /tmp
tomcat-4.1.24.tar.gz http://ftp.epix.net/apache/jakarta/tomcat-4/binaries/
j2sdk-1_3_1_08-linux-i586.bin http://java.sun.com/j2se/1.3/download.html
NEED TO BUILD mod_jk.so. Most likely not available for download.
2. chmod a+x j2sdk-1_3_1_08-linux-i586.bin
3. ./ j2sdk-1_3_1_08-linux-i586.bin
4. cp jdk1.3.1_08 /usr/local/jdk1.3.1_08
5. cp mod_jk.so /usr/local/apache/conf (Need to build first – See instruction on bottom of this page Step 17)
6. Modify /usr/local/apache/conf/httpd.conf
in the beginning of the LoadModule Section
LoadModule jk_module libexec/mod_jk.so
JkWorkersFile conf/workers.properties
JkLogFile logs/mod_jk.log
JkLogLevel info
In AddModule Section
AddModule mod_jk.c
After DocumentRoot
JkMount /*.jsp loadbalancer
JkMount /servlet/* loadbalancer
JkMount /examples/* loadbalancer
7. Create workers.properties file in /usr/local/apache/htconf
#
# workers.properties
#
# In Unix, we use forward slashes:
ps=/
# list the workers by name
worker.list=tomcat1, tomcat2, loadbalancer
# ------------------------
# First tomcat server
# ------------------------
worker.tomcat1.port=11009
worker.tomcat1.host=localhost
worker.tomcat1.type=ajp13
# Specify the size of the open connection cache.
#worker.tomcat1.cachesize
#
# Specifies the load balance factor when used with
# a load balancing worker.
# Note:
# ----> lbfactor must be > 0
# ----> Low lbfactor means less work done by the worker.
worker.tomcat1.lbfactor=100
# ------------------------
# Second tomcat server
# ------------------------
worker.tomcat2.port=12009
worker.tomcat2.host=localhost
worker.tomcat2.type=ajp13
# Specify the size of the open connection cache.
#worker.tomcat2.cachesize
#
# Specifies the load balance factor when used with
# a load balancing worker.
# Note:
# ----> lbfactor must be > 0
# ----> Low lbfactor means less work done by the worker.
worker.tomcat2.lbfactor=100
# ------------------------
# Load Balancer worker
# ------------------------
#
# The loadbalancer (type lb) worker performs weighted round-robin
# load balancing with sticky sessions.
# Note:
# ----> If a worker dies, the load balancer will check its state
# once in a while. Until then all work is redirected to peer
# worker.
worker.loadbalancer.type=lb
worker.loadbalancer.balanced_workers=tomcat1, tomcat2
#
# END workers.properties
#
8. gunzip < tomcat-4.1.24.tar.gz | tar xvf -
9. cp jakarta-tomcat-4.1.24 /usr/local/jakarta-tomcat-4.1.24
10. cp jakarta-tomcat-4.1.24 /usr/local/tomcat1
11. cp jakarta-tomcat-4.1.24 /usr/local/tomcat2
12. Modify /usr/local/tomcat1/bin/catalina.sh add -->
CATALINA_HOME=usr/local/tomcat1 ; export CATALINA_HOME
13. Modify /usr/local/tomcat2/bin/catalina.sh add -->
CATALINA_HOME=usr/local/tomcat2 ; export CATALINA_HOME
14. Modify /usr/local/tomcat1/conf/server.xml (14 - 18 taken from http://www.ubeans.com/tomcat/index.html)
14.1 Modify conf/server.xml
14.1.1 Add a unique jvmRoute to the Catalina engine
Near line 100, replace: <Engine name="Standalone" defaultHost="localhost" debug="0">
with: <Engine jvmRoute="tomcat1" name="Standalone" defaultHost="localhost" debug="0">
For tomcat2, put jvmRoute="tomcat2".
14.1.2 Change the control port
At line 13, replace: <Server port="8005"
with: <Server port="11005"
For the tomcat2 server, replace port 8005 with 12005. This will prevent the two servers from conflicting.
14.1.3 Change the AJP13 port
At line 75, in the AJP 13 connector definition, replace: port="8009"
with: port="11009"
For the tomcat2 server, replace port 8009 with 12009.
14.1.4 Disable the standalone HTTP port
We don't want or need our tomcat servers to directly respond to HTTP requests. So we comment out the HttpConnector section in the server.xml file.
Example:
<!-- Define a non-SSL HTTP/1.1 Connector on port 8080 -->
<!--
<Connector className="org.apache.catalina.connector.http.HttpConnector"
port="8080" minProcessors="5" maxProcessors="75"
enableLookups="true" redirectPort="8443"
acceptCount="10" debug="0" connectionTimeout="60000"/>
-->
14.1.5 Disable the WARP connector
At line 314, comment out the <Connector...WarpConnector...> tag.
Example:
<Service name="Tomcat-Apache">
<!--
<Connector className="org.apache.catalina.connector.warp.WarpConnector"
port="8008" minProcessors="5" maxProcessors="75"
enableLookups="true" appBase="webapps"
acceptCount="10" debug="0"/>
-->
Do not forget to do the same thing to tomcat2's server.xml file.
15. Create a file named index.jsp and put it in the /usr/local/tomcat2/webapps/ROOT directory:
<html>
<body bgcolor=red>
<center>
<h1>Tomcat 1</h1>
</body>
</html>
16. Create a file named index.jsp and put it in the /usr/local/tomcat2/webapps/ROOT directory:
<html>
<body bgcolor=blue>
<center>
<h1>Tomcat 2</h1>
</body>
</html>
17. Build mod_jk.so for step 5 (steps 18-24).
18. Check if apxs available . Type whereis apxs
19. Download Tomcat connector source package to /tmp from http://jakarta.apache.org
20. gunzip <tomcat-connectors-4.1.24-src.tar.gz
21. cd jakarta-tomcat-connectors-4.1.24-src/jk/native
22. ./buildconf.sh
23. ./configure –with-apxs=/usr/local/apache/bin/apxs
24. make
25. do step 5.
26. /usr/local/apache/bin/apachectl stop
27. /usr/local/tomcat1/bin/startup.sh
/usr/local/tomcat2/bin/startup.sh
/usr/local/apache/bin/apachectl start
28. Reload index.jsp several times. Exit browser and go to index.jsp. Should change servers. DONE!