Warewulf Node Health Check (NHC) is a periodic "node health check" script to be
executed on each compute node to verify that the node is working properly. Nodes
which are determined to be "unhealthy" can be marked as down or offline so as to
prevent jobs from being scheduled or run on them. This helps increase the
reliability and throughput of a cluster by reducing preventable job failures due
to misconfiguration, hardware failures, etc.