Configure an Apache web server for Tomcat load balancing

1. Open the Apache /conf/httpd.conf file and un-comment the LoadModule directives in the httpd.conf file that enable AJP13. The LoadModule directives include:
   • LoadModule proxy_ajp_module modules/mod_proxy_ajp.so
   • LoadModule proxy_balancer_module modules/mod_proxy_balancer.so
   Note: Depending on which version of Apache you are using, there may be additional modules required. See the Apache web site (http://httpd.apache.org/) for documentation about your version of the Apache web server.
2. Add the following definitions to /conf/httpd.conf:

   #workers.properties load balancing config LoadModule jk_module apache_install_dir/modules/mod_jk.so JkWorkersFile apache_install_dir/conf/workers.properties JkShmFile apache_install_dir/logs/mod_jk.shm JkLogFile apache_install_dir/logs/mod_jk.log JkLogLevel info JkLogStampFormat "[%a %b %d %H:%M:%S %Y]" JkMount /* jklb

3. Use PASMAN to enable the AJP13 port in the /conf/server.xml file:

   pasman -I instance-name feature AJP13=on

4. Update AJP connector section in server.xml with secretRequired="false”.

   <!-- feature:begin:AJP13:on -->
       <Connector executor="tomcatThreadPool"
                  address="${psc.as.ajp13.address}"
                  port="${psc.as.ajp13.port}" 
                  protocol="AJP/1.3" 
                  asyncTimeout="${psc.as.msg.timeout}"
                  maxPostSize="${psc.as.msg.maxpostsize}"
                  acceptCount="${psc.as.http.maxqueuesize}"
                  maxConnections="${psc.as.http.maxconnections}"
                  tomcatAuthentication="${psc.as.ajp13.tomcatauth}"
                  redirectPort="${psc.as.https.port}" 
                  URIEncoding="${psc.as.http.uriencoding}" 
                  secretRequired="false" />
       <!-- feature:end:AJP13:on -->
   

5. Update ajp13 address to receive connections from anywhere (Update if pasoe and load balancer are on different machines) - Update property in instance/conf/catalina.properties as follows:

   psc.as.ajp13.address=::

Apache now passes all requests to a PAS for OpenEdge load balancing instance through its AJP13 port.