System Requirements

• Tomcat 6 or higher
  
• The application's web.xml has must have <distributable/> tag.

Network Requirements

• Have multicast enabled for tomcat to communicate.

Configuring Tomcat for Cluster

1. Add the cluster config inside the <Host> tag. I have attached the cluster config text to this page.
   
   • The only changes that needs to be made is the (name="<Put_application_Name_Here>"). Put the .war file name.
2. export the server.xml file to the servers that are part of the cluster.
   
3. restart all tomcat instances.