tomcat webapp failover

Question

I am working on the high availability aspect of a webapp deployed in tomcat. I require a mechanism for failover such that it should not be apparent to the webapp user and have am looking at tomcat clustering as a solution for the same.

If I am looking only at failover and not on load balancing(not required at this point) , how should I configure the tomcat cluster ?

EDIT

I am aware about the mechanism but am looking at the configuration aspect.

Answer 1

looking for this myself, I finally found https://tomcat.apache.org/connectors-doc/common_howto/loadbalancers.html, look for "configure hot spare workers" under "Advanced Load Balancer Worker Properties"