Resizing (Expanding) a Logical Volume with sbcli

Overview

Resizing a logical Volume (LV) in simplyblock allows additional capacity to be allocated without downtime, ensuring workloads have sufficient storage as demand grows. The sbcli command line interface is used to expand the size of an existing Logical Volume in a simple and efficient manner.

Prerequisites

• A running simplyblock cluster with a valid logical volume.
• sbcli installed and configured with access to the simplyblock management API.

Expanding a Logical Volume

To increase the size of an existing logical volume:

sbcli volume resize \
  <VOLUME_UUID> \
  <NEW_SIZE>

Verification

After resizing, confirm the new volume size:

sbcli volume get <VOLUME_UUID>

Resize the Filesystem (If Required)

Certain filesystems, such as ext4, may require growing the filesystem after the underlying volume has been expanded.

For ext4 filesystems:

resize2fs /dev/nvmeXnY

For xfs filesystems:

xfs_growfs /mount/point

Shrinking a Volume

Theoretically it is possible to shrink a volume. It can, however, create issues with certain filesystems. When a volume needs to be shrunk, it is recommended to create a snapshot and restore it onto a new volume.