第5章 Expanding persistent volumes

Learn how to expand persistent volumes in MicroShift.

5.1. Expanding CSI volumes
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You can use the Container Storage Interface (CSI) to expand storage volumes after they have already been created.

Shrinking persistent volumes (PVs) is not supported.

Prerequisites

The underlying CSI driver supports resize. See "CSI drivers supported by Red Hat build of MicroShift" in the "Additional resources" section.
Dynamic provisioning is used.
The controlling StorageClass object has allowVolumeExpansion set to true. For more information, see "Enabling volume expansion support."

Procedure

For the persistent volume claim (PVC), set .spec.resources.requests.storage to the desired new size.
Watch the status.conditions field of the PVC to see if the resize has completed. Red Hat build of MicroShift adds the Resizing condition to the PVC during expansion, which is removed after expansion completes.