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NetApp Stage KB

Trident's CSI support changed the previously practical volume naming scheme

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astra_trident
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SNAPX
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Applies to

  • Trident 19.07 and higher
  • Trident 19.04 with CSI beta implementation (not meant for production)

Issue

Changing from non-CSI to CSI implementation with Trident changes the flexvol naming in a way that inconviences previous usage of the ONTAP flexvols for:

  • storage admins to report on NAS volumes running full to the right kuberenetes application developer/maintainers
  • assign storage usage cost to the right cost centers, depending on namespace.

With the CSI usage, identifying the namespace and deployment requires accessing Trident and Kuberenetes based information:

  • take the Volume name (<storagePrefix>_<PVC>_<long_UUID>) from ONTAP and convert it to the PV syntax of Kuberenetes/OCP (pvc-<UUID>)
  • search from Kuberenetes/Openshift that PV to which PVC it ​​belongs
  • apply what the necessary functionality is from namespace and deployment (e.g. resizing the volume, or adding the data into a spreadsheet)

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