Extend a volume

Resize volumes to increase storage capacity with minimal downtime, without migrating data or creating new volumes. You can only increase volume size; the Block Storage service (cinder) does not support reducing size.

About this task

Note

The ability to resize a volume in use is supported but it is driver dependent. Red Hat Ceph Storage is supported. You cannot extend in-use multi-attach volumes. For more information about support for this feature, contact Red Hat Support.

Procedure

  1. Access the remote shell for the openstackclient pod from your workstation: 
    $ oc rsh -n openstack openstackclient
  2. Increase the size of the volume: 
    $ openstack volume set --size <size> <volume>
    • Replace <size> with the required size of this volume, in gigabytes.
    • Replace <volume> with the name or ID of the volume you want to extend. You can list the available volumes by using the openstack volume list command.
  3. Optional: This command does not provide any confirmation that volume has been successfully resized. You can run the following command to review the changes made to this volume: 
    $ openstack volume show <volume>
  4. Exit the openstackclient pod: 
    $ exit