How do I configure my fence device to panic my cluster node instead of rebooting in a RHEL High Availability cluster?

Solution Verified - Updated -

Issue

  • A node becomes non-responsive and it would be useful to automatically issue an NMI from our ilo/idrac to initiate a panic and capture a vmcore for debugging instead of rebooting the node.
  • I have a node that is getting hung to the point of not communicating in the cluster and thus gets fenced, and I want to capture a vmcore from it while its in that hung state. Can I trigger fencing to crash the box and dump a core?

Environment

  • Red Hat Enterprise Linux (RHEL) 5, 6, 7, 8, 9 with the High Availability Add-On

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