My question is what (if anything) can RHCS/GFS do to determine the
health/presence/operation of fencing devices? If it can do something
to monitor the fencing devices, and discovers a bad fencing device,
what will it do? For example, if I unplug the network cable for the
heartbeat, the node will get fenced immediately. I never tested
whether the same would happen if I unplugged a fencing device. I
haven't delved into the documentation in a while, but I don't remember
anything about a way to have redundant fencing devices, like a DRAC
and a network power switch. Is there a way?
You should be able to add as many fencing devices as you like, cman
should go through them top to bottom, if it won't get a positive
response from the fencing script.
in my case i have IPMI, then network power switch, then fabric fencing.
Regards,
Johannes
Thoughts, opinions, insight, documentation, etc would be greatly
appreciated.
--
Brandon
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