First read this http://tomcat.apache.org/tomcat-7.0-doc/config/host.html
If you want tomcat to accept requests for different hosts e.g., www.myhostname.com then you must
0. create ${catalina.base}/www/appBase , ${catalina.base}/www/deploy, and ${catalina.base}/conf/Catalina/www.myhostname.com
- add a host entry in the server.xml file
<Host appBase="www/appBase" name="www.myhostname.com"/>
2. Create the the following file under conf/Catalina/www.myhostname.com/ROOT.xml
<?xml version="1.0" encoding="UTF-8"?> <Context docBase="${catalina.base}/www/deploy/mywebapp.war"> </Context>
Add any parameters specific to this hosts webapp to this context file
3. put your war file in ${catalina.base}/www/deploy
When tomcat starts, it finds the host entry, then looks for any context files and will start any apps with a context.
To add more sites just repeat and rinse, all webapps can share the same war file location and appbase.