Monday, 30 July 2007

Getting mod_jk to work

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This blog is now accessible at http://blog.bwtaylor.com . To make this work I did three things:

I added blog.bwtaylor.com to my DNS
I set up mod_jk and configured it to route the virtual host blog.bwtaylor.com to the AJP1.3 connector on port 8009
I added a redirect in index.html at higher levels to go to the blogsom/blog/spout context path

These three steps are all you have to do to have simple apache tomcat integration so that tomcat access that is normally on port 8080 is added to the regular apache URL namespaces.

The mod_jk setup was pretty easy. After downloading the appropriate mod_jk binary from a mirror like this one and symlinking it to the name mod_jk.so in the apache modules directory, I added this to /etc/httpd/conf/httpd.conf

 LoadModule jk_module modules/mod_jk.so

Then I created a workers.properties file under /etc/httpd/conf like so:

# List workers
worker.list=tomcatWorker
# Define wrkr
worker.tomcatWorker.port=8009
worker.tomcatWorker.host=localhost
worker.tomcatWorker.type=ajp13
worker.tomcatWorker.cachesize=10
worker.tomcatWorker.cache_timeout=600
worker.tomcatWorker.socket_timeout=300

and finally I finished off the connection by adding mod_jk.conf under /etc/httpd/conf.d for the virtual hosting rules:

JkWorkersFile /etc/httpd/conf/workers.properties

JkShmFile     /var/log/httpd/mod_jk.shm
JkLogFile     /var/log/httpd/mod_jk.log
JkLogLevel    info
JkLogStampFormat "[%a %b %d %H:%M:%S %Y] "

NameVirtualHost *:80
<VirtualHost blog.bwtaylor.com:80>
    DocumentRoot /opt/tomcat/webapps
    ErrorLog /var/log/httpd/mod_jk-error.log
    CustomLog /var/log/httpd/mod_jk-access.log common
    <LocationMatch ".*WEB-INF.*">
        AllowOverride None
        deny from all
    </LocationMatch>
    JkMount /* tomcatWorker
</VirtualHost>