Setting Load balancer for JBoss using Apache and mod_jk

[Kshitija Ambulgekar]

Hi,

I am trying to set loadbalancer for JBoss using Apache and mod_jk.
1) I have modified httpd.conf file by adding following line at end:
Include APACHE_HOME/conf/mod-jk.conf

2) created APACHE_HOME/conf/mod-jk.conf file
3) Created APACHE_HOME/conf/workers.properties file
4) Created APACHE_HOME/conf/uriworkermap.properties file
5) Placed mod_jk.so in APACHE_HOME/modules folder

When I am starting the Apache server, it is giving me error saying:
"Cannot load C:/Program Files/Apache Group/Apache2/modules/mod_jk.so into server:The specified module could not be found."

Can somebody help on this? I am badly stuck on this problem.

[Mark Spritzler]

Can you post what you have in your APACHE_HOME/conf/mod-jk.conf file?

Also your workers.properties too, just in case.

Mark

[Kshitija Ambulgekar]

Contents of mod-jk.conf are

 # Load mod_jk module 
# Specify the filename of the mod_jk lib
#LoadModule jk_module modules/mod_jk.so This line is included in httpd.conf file
 
# Where to find workers.properties
JkWorkersFile conf/workers.properties
 
# Where to put jk logs
JkLogFile logs/mod_jk.log
 
# Set the jk log level [debug/error/info]
JkLogLevel info 
 
# Select the log format
JkLogStampFormat  "[%a %b %d %H:%M:%S %Y]"
 
# JkOptions indicates to send SSK KEY SIZE
JkOptions +ForwardKeySize +ForwardURICompat -ForwardDirectories
 
# JkRequestLogFormat
JkRequestLogFormat "%w %V %T"
               
# Mount your applications
JkMount /application/* loadbalancer
 
# You can use external file for mount points.
# It will be checked for updates each 60 seconds.
# The format of the file is: /url=worker
# /examples/*=loadbalancer
JkMountFile conf/uriworkermap.properties               
 
# Add shared memory.
# This directive is present with 1.2.10 and
# later versions of mod_jk, and is needed for
# for load balancing to work properly
JkShmFile logs/jk.shm 
              
# Add jkstatus for managing runtime data
<Location /jkstatus/>
    JkMount status
    Order deny,allow
    Deny from all
    Allow from 127.0.0.1
</Location>   

workers.properties

 # Define list of workers that will be used
# for mapping requests
worker.list=loadbalancer,status
 
# Define Node1
# modify the host as your host IP or DNS name.
worker.node1.port=8080
worker.node1.host=node1.mydomain.com 
worker.node1.type=ajp13
worker.node1.lbfactor=1
worker.node1.cachesize=10
 
# Define Node2
# modify the host as your host IP or DNS name.
worker.node2.port=8280
worker.node2.host= node2.mydomain.com
worker.node2.type=ajp13
worker.node2.lbfactor=1
worker.node2.cachesize=10
 
# Load-balancing behaviour
worker.loadbalancer.type=lb
worker.loadbalancer.balance_workers=node1,node2
worker.loadbalancer.sticky_session=1
#worker.list=loadbalancer
 
# Status worker for managing load balancer
worker.status.type=status   

[Mark Spritzler]

First, is this your actual IP/URL address of the App Servers you want to forward to, node1.mydomain.com?

worker.node1.host=node1.mydomain.com

Also, it looks like the loading part of the module, the line in the mod_jk.conf file is commented out

#LoadModule jk_module modules/mod_jk.so This line is included in httpd.conf file

You had only mentioned in the first post of this thread that you only added this line below

Include APACHE_HOME/conf/mod-jk.conf

which just includes the conf file, not load the module

Mark