vSAN online health 'Upgrade vSphere CSI driver with caution'

Products

• VMware vSAN

Issue/Introduction

vSAN online health alarm reports 'Upgrade vSphere CSI driver with caution'

vSAN file services is enabled and vSAN file share volumes are in use as Read Write Many (RWM) vSphere CSI Volumes.

Environment

VMware vSAN 7.0
VMware vSAN 8.0

Resolution

As detailed in KB vSphere CSI Driver - Upgrade, vSAN file share volumes used as Read Write Many vSphere CSI Volumes may become inaccessible after upgrading the vSphere CSI Driver to versions 2.0.x, 2.1.x or 2.2.x. The fix for this issue is in CSI driver 2.3.0 release. 

This vSAN online health warning is advisory of this issue for those considering a CSI driver upgrade in such environments. It does not indicate a current problem.

The health warning is triggered:
- File service is enabled on vSAN cluster
- Cloud Native Storage (CNS) is in use and there is one or more CNS/CSI file share volumes