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Snapshot Deletion Issues in Trident with ONTAP and CloneSplit Behavior

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Category:
trident-kubernetes
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snapx
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Applies to

  • NetApp Astra Trident
  • 3rd party backup solution

Issue

  • Snapshots created for Kubernetes Persistent Volumes (PVs) via Trident were not being deleted as expected after backup operations.
  • The external backup tool logs showed snapshot deletion requests, but Trident returned errors such as:

level=error msg="Unable to delete snapshot from backend." error="snapshot ... is busy"
level=error msg="GRPC error: rpc error: code=Unknown desc=snapshot ... is busy"
level=info msg="Began splitting clone from snapshot."

  • There are offline clones and their related snapshots remaining on the storage after the external tool backup.

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