Red Hat build of MicroShift

Expanding CSI volumes

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.

For information about which CSI drivers support resizing, see under the Additional resources section "CSI drivers supported by {product-title}".
Dynamic provisioning is used.
The controlling StorageClass object has allowVolumeExpansion set to true.

For more information, see section Enabling volume expansion support.

Procedure

For the persistent volume claim (PVC), set .spec.resources.requests.storage to the desired new size.

Verification

To confirm that the resize is finished, look at the status.conditions field of the PVC . {product-title} adds the Resizing condition to the PVC during expansion, which is removed after expansion completes.