Volume resizing not working in Node controller

[afritzler]

Describe the bug

When resizing a PVC the resize call against the API for changing the Volume size is called via the CSI controller. However the resizing of the mounted Volume on the Node is not working. It looks like the corresponding ResizeFS is not working in the Node controller.

To Reproduce

Install the CSI into a cluster which has an expandable StorageClass. Change the size of the PVC and observe the changed size of the Volume itself. When exec-ing into the Pod using the Volume the old size is still present. Also the PVC volume size is unchanged.

Expected behavior

Both the PVC size and the size of the mounted Volume on the host/Pod should be changed to the new size.