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Author: denevell

tomcat7-apache-httpd-integration.md

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+Title: Tomcat 7: Apache HTTPd 2.2 integration with virtual-hosts
+Tags: tomcat,apache,apache-mod_rewrite
+
+First install and enable the mod_jk module for Apache
+
+		apt-get install libapache2-mod-jk
+		a2enmod jk
+
+Then create a workers file. A worker is a process that will connect you to a tomcat instance. We're creating the workers.properties file at /etc/apache2/workers.properties.
+
+		worker.list=worker1
+		worker.worker1.type=ajp13
+		worker.worker1.host=localhost
+		worker.worker1.port=8009
+
+We're giving it a name (will be used later), saying we're using the ajp13 connector to connect to tomcat 6 and above instances, saying it's on localhost and saying we're listening on port 8009 (we'll set tomcat listening on this port in a little while.)
+
+Now in your apache.conf file, add:
+
+		JkWorkersFile /etc/apache2/workers.properties
+		JkShmFile /var/log/apache2/mod_jk.shm
+		JkLogFile /var/log/apache2/mod_jk.log
+		JkLogLevel info
+		JkLogStampFormat "[%a %b %d %H:%M:%S %Y] "
+
+Here we point to our workers file, setup some file locations to be next to each other and set some logging information.
+
+Finally edit the /etc/tomcat7/server.xml to accept these ajp13 connections. Uncommend this line:
+
+	    <Connector port="8009" protocol="AJP/1.3" redirectPort="8443" />
+
+The only thing left is to setup your virual host file. Here's an example of a virtual host file you should have in /etc/apache2/sites-available/blar
+
+		<VirtualHost *:80>
+		  ...
+
+		  JkMount / worker1
+		  JkMount /* worker1
+
+		  RewriteEngine on
+		  RewriteRule ^/(.*)$ /YOUR_DEPLOYMENT_NAME/$1 [L,PT]
+
+		  ...
+		</VirtualHost>
+
+Note we're pointing all the files that hit the root of our virual host to our worker via the JkMount command.
+
+Generally, our tomcat servlets or jsp pages are prefixes with the name of the deployment file. Hello.war would be prefixed with Hello/. To get around this the RewriteRule gets around this by rewriting anything going to the root by transparently adding the deployment name.