Custom HA agent - Red Hat Linux Cluster

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http://www.unix.com – Hi experts, I have some custom application which I need to make Highly Available using red hat cluster service. How do I do it? i know in /usr/share/cluster i shall find HA agents for well known services like Apache or Sybase but I want to write HA agent for my own. I tried looking up on internet, and red hat documentation but couldn't find any systematic resource for the same. In system-config-cluster; I see a resource named script. Do I have to use this script resource for my custom application? If yes, I already did that. I wrote a script using apache.sh (found in /usr/share/cluster) (HowTos)