Configuring Tomcat5 and Apache2 with Virtual Hosts using mod_jk - Page 3

Configure Tomcat

Create the workers.properties file

Important note: Be sure to make a backup copy of your config files before modifying.

The workers.properties file contains the details about how each process is linked to Tomcat by defining workers that communicate through the ajpv13 protocol. Refer to the Workers HowTo for more detail.

  1. First create the workers.properties file in your Apache2 root directory.

touch /etc/apache2/workers.properties

  1. Next, open the workers.properties file and ad the following. You can find many other examples of the workers.properties file on the internet, but this is the one that I created and it seems to work fine with the other portions that have already been configured in this tutorial.

workers.tomcat_home=/usr/lib/apache-tomcat
 
workers.java_home=/usr/lib/jdk
 
ps=/
 
worker.list=worker1
 
worker.worker1.port=8009
worker.worker1.host=localhost
worker.worker1.type=ajp13
worker.worker1.lbfactor=1
 
worker.loadbalancer.type=lb
worker.loadbalancer.balanced_workers=worker1
 
worker.inprocess.type=jni
 
worker.inprocess.class_path=$(workers.tomcat_home)$(ps)lib$(ps)tomcat.jar
 
worker.inprocess.cmd_line=start
 
worker.inprocess.jvm_lib=$(workers.java_home)$(ps)jre$(ps)lib$(ps)
i386$(ps)classic$(ps)libjvm.so
 
worker.inprocess.stdout=$(workers.tomcat_home)$(ps)logs$(ps)inprocess.stdout
worker.inprocess.stderr=$(workers.tomcat_home)$(ps)logs$(ps)inprocess.stderr

  1. Save and close the file.

  1. Now we need to configure the server.xml file located at /usr/lib/apache-tomcat/conf/. There are endless ways to configure the server.xml file, but I will provide to you how I did it on this server based on the other sections of this tutorial. First make a copy of your original server.xml file and rename it.

  1. Delete the original contents and add the following to the original server.xml file.

<Server port="8005" shutdown="SHUTDOWN">
 
  <Listener className="org.apache.catalina.mbeans.GlobalResourcesLifecycleListener" />
  <Listener className="org.apache.catalina.storeconfig.StoreConfigLifecycleListener"/>
 
  <!-- Global JNDI resources -->
  <GlobalNamingResources>
 
    <!-- Test entry for demonstration purposes -->
    <Environment name="simpleValue" type="java.lang.Integer" value="30"/>
 
    <!-- Editable user database that can also be used by
         UserDatabaseRealm to authenticate users -->
    <Resource name="UserDatabase" auth="Container"
              type="org.apache.catalina.UserDatabase"
       description="User database that can be updated and saved"
           factory="org.apache.catalina.users.MemoryUserDatabaseFactory"
          pathname="conf/tomcat-users.xml" />
 
  </GlobalNamingResources>
 
 
  <!-- Define the Tomcat Stand-Alone Service -->
  <Service name="Catalina">
 
    <!-- A "Connector" represents an endpoint by which requests are received
         and responses are returned.  Each Connector passes requests on to the
         associated "Container" (normally an Engine) for processing.
    -->
 
    <!-- Define a non-SSL HTTP/1.1 Connector on port 2117 (default 8080) -->
    <Connector port="2117" maxHttpHeaderSize="8192"
               maxThreads="150" minSpareThreads="5" maxSpareThreads="75"
               enableLookups="false" redirectPort="8443" acceptCount="100"
               connectionTimeout="20000" disableUploadTimeout="true" />
 
 
    <!-- Define an AJP 1.3 Connector on port 8009 -->
    <Connector port="8009"
               enableLookups="false" redirectPort="8443" protocol="AJP/1.3" />
 
    <!-- Define a Proxied HTTP/1.1 Connector on port 8082 -->
    <!-- See proxy documentation for more information about using this. -->
    <!--
    <Connector port="8082"
               maxThreads="150" minSpareThreads="25" maxSpareThreads="75"
               enableLookups="false" acceptCount="100" connectionTimeout="20000"
               proxyPort="80" disableUploadTimeout="true" />
    -->
 
    <!-- An Engine represents the entry point (within Catalina) that processes
         every request.  The Engine implementation for Tomcat stand alone
         analyzes the HTTP headers included with the request, and passes them
         on to the appropriate Host (virtual host). -->
      
    <!-- Define the top level container in our container hierarchy -->
    <Engine name="Catalina" defaultHost="localhost">
 
      <Realm className="org.apache.catalina.realm.UserDatabaseRealm"
             resourceName="UserDatabase"/>
 
      <!-- Define the default virtual host -->
 
      <Host name="localhost" appBase="webapps"
       unpackWARs="true" autoDeploy="true"
       xmlValidation="false" xmlNamespaceAware="false">
 
        <Valve className="org.apache.catalina.valves.AccessLogValve"
                 directory="logs"  prefix="localhost_access_log." suffix=".txt"
                 pattern="common" resolveHosts="false"/>
      </Host>
 
      <!-- www.domain1.com -->
      <Host name="www.domain1.com" appBase="/home/www/web1/web"
        unpackWARs="true" autoDeploy="true">
 
        <Context path="" docBase="jsp-examples" debug="0" reloadable="true"/>
 
        <Valve className="org.apache.catalina.valves.AccessLogValve"
                 directory="logs"  prefix="web1_access_log." suffix=".txt"
                 pattern="common" resolveHosts="false"/>
      </Host>
 
      <Listener className="org.apache.jk.config.ApacheConfig"
                 modJk="/usr/lib/apache2/modules/mod_jk.so"
                 workersConfig="/etc/apache2/workers.properties"/>
 
    </Engine>
 
  </Service>
 
</Server>

  1. In order to run the Tomcat auto-config you need to assure that the following line represents the appropriate locations to your mod_jk.so file and workers.properties file.

<Listener className="org.apache.jk.config.ApacheConfig" modJk="/usr/lib/apache2/modules/mod_jk.so" workersConfig="/etc/apache2/workers.properties" />

  1. Restart Tomcat to create the auto-config file.

Important note: Make sure Apache2 is not running before restarting Tomcat or else auto-config will not create the config file.

cd /usr/lib/apache-tomcat/bin

sh shutdown.sh

sh startup.sh

  1. Provided you didn’t have any errors restarting Tomcat, you should have a newly created file in /usr/lib/apache-tomcat/conf/auto/ called mod_jk.conf.

  1. Now we need to open the /etc/apache2/apache2.conf file and add the following line at the bottom.

Include /usr/lib/apache-tomcat/conf/auto/mod_jk.conf
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