Integrating apache tomact with mod_jk

Configuring Apache 2.x and Tomcat 6.x with mod_jk

Tomcat can be run as a standalone server. Tomcat can also be run as an add-on to the Apache HTTP Server (or Microsoft IIS) - as the Java servlet/JSP container. In this combination, Tomcat executes the Java servlets and JSPs, the Apache serves the static HTML pages and performs other server-side functions such as CGI, PHP, SSI, etc. Read "Why should I integrate Apache with Tomcat? (or not)" at Tomcat FAQ

To configure Tomcat to work with Apache HTTP Server, you should first read the documentation provided in Tomcat thoroughly, and read the "Tomcat Connector" documents

To run Tomcat together with Apache:

• Apache needs to load a "adapter" module, which uses a certain protocol, such as Apache JServ Protocol (AJP), to communicate with the Tomcat, via another TCP port (port 8009 in the default configuration).
• When Apache receives an HTTP request, it checks if the request belongs to Tomcat. If so, it lets the adapter takes the request and forwards it to Tomcat, as illustrated below.

The system used in this tutorial has the following installed:

1.WebServer: Apache 2.x
2.JDK: JDK 6.x
3.Servlet Container: Tomcat 6.x
4.Tomcat Connecter: Jakarta Tomcat Connector mod_jk.so (not mod_jk2.so)

Installing Apache:

#yum install httpd*
#yum install gcc gcc-cpp gcc-c++
Because you will need httpd-devel for apxs
or
#yum install httpd-devel

Start the apache service
#/etc/init.d/httpd start
#Chkconfig httpd on

Checking process:-

# netstat -ntplau | grep httpd

tcp 0 0 :::80 :::* LISTEN 2793/httpd

First install jdk java

#yum install java*

Set the following environment variables:

You can add it in .bashrc for permanent use

example:-

export JAVA_HOME=/usr/lib/jvm/java-1.7.0-openjdk-1.7.0.5/

export PATH=/usr/lib/jvm/java-1.7.0-openjdk-1.7.0.5/bin:/root/Desktop/grails-1.0.2/bin:$PATH

export GRAILS_HOME=/root/Desktop/grails-1.0.2

Checking process:-

#javac

#java -version

Download Tomcat 6:

Untar the package:
#tar xvzf apache-tomcat-6.0.26.tar.gz
#cd apache-tomcat-6.0.26
#cd bin
#./startup.sh

Checking process:-

#netstat -tulpn | grep 8080

tcp 0 0 :::8080 :::* LISTEN 2525/java

Now install jakarta connector:

#tar xvzf jakarta-tomcat-connectors-1.2.15-src.tar.gz
#cd jakarta-tomcat-connectors-1.2.15-src
#cd jk/
#cd native/
#./configure --with-apxs=/usr/sbin/apxs
#make
#make install

Create workers.properties file in /etc/httpd/conf with following contents:

#
# This file provides minimal jk configuration properties needed to
# connect to Tomcat.
#
# We define a worked named 'default'
#

workers.tomcat_home=/usr/local/tomcat
workers.java_home=/usr/java/jdk1.5.0_05
ps=/
worker.list=default

worker.default.port=8009
worker.default.host=localhost
worker.default.type=ajp13
worker.default.lbfactor=1

Edit httpd.conf and add the following mod_jk-specific directives (I added them just before the start of Section 3 / Virtual Hosts).

#
# Mod_jk settings
#
# Load mod_jk module
LoadModule jk_module modules/mod_jk.so
# 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 debug
# Select the log format
JkLogStampFormat "[%a %b %d %H:%M:%S %Y] "
# JkOptions indicate to send SSL KEY SIZE,
JkOptions +ForwardKeySize +ForwardURICompat -ForwardDirectories
# JkRequestLogFormat set the request format
JkRequestLogFormat "%w %V %T"
# Send JSPs for context /jsp-examples to worker named default
JkMount /sureryplant default
# Send servlets-examples to worker named default
JkMount /sureryplant/* default

# Static files in the jsp-examples webapp are served by apache
Alias /sureryplant "/usr/local/tomcat/webapps/sureryplant"

Restart Apache via /etc/init.d/httpd restart

Test standalone Tomcat server by going to http://Web_server_name_or_IP:8080

Test Apache/Tomcat integration by going to http://Web_server_name_or_IP/ sureryplant and http://Web_server_name_or_IP/ sureryplant

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