STONITH

In STONITH, specific hardware is used to terminate a node that is no longer responsive to the cluster. The idea behind STONITH is that before migrating resources to another node in the cluster, the cluster has to confirm that the node in question really is down. To do this, the cluster will send a shutdown action to the STONITH device, which will, in turn, terminate the nonresponsive node. (Van Vugt 2014)

Mechanisms

Power Fencing

  • Cuts the node off from power.

Fabric Fencing :: Disconnects the machine from storage.

  • By closing ports in a Fibre Channel Switch.
  • By using SCSI reservations.

Fencing Agents

References:

Van Vugt, Sander. 2014. Pro Linux High Availability Clustering. Apress.

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