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Why StorageGRID Unable to Communicate with Node alert did not trigger

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storagegrid-webscale
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Applies to

NetApp StorageGRID

Answer

The Unable to communicate with node alert looks for the following attributes from Prometheus.

  • (count(up != 1) without (job) > 0) - Checks if a node is unreachable or offline

  • unless on(instance) storagegrid_administratively_down == 1 - Checks if the node is administratively down

The administratively down attribute determines if the node being down is expected. The attribute is set during the following exceptions.
  • Placed into maintenance mode
  • Being decommissioned
  • Undergoing a clone operation
  • Powered offline from the BMC or physically
  • Shut down from CLI
If the administratively down attribute is true, the alert will not trigger.

Additional Information

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