I was wondering about a package so I can do it "in the house".

In what house? that of perl? or that of Linux HA clusters?

For perl - if you want to have HA perl processes, one idea that comes to mind is using POE and register a watchdog session in each process on the cluster members.

For interfacing with Linux cluster management - as mentioned, system to interface with binaries, or IPC::Open2 or IPC::Open3. Or POE again, using POE::Wheel::Run. I don't know whether there are C libraries for cluster management or (XS) perl modules which implement an interface to those.

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