vSAN Health Service – Online Health - VM storage policy is not-recommended

Products

• VMware vSAN

Issue/Introduction

This article introduces Online Health - VM storage policy is not-recommended check in the vSAN Health Service and provides details on why it might report the warning and how to fix the warning state.

Environment

VMware vSAN 8.0.x

Resolution

Q: What does the Online Health - VM storage policy is not-recommended check do?

In vSAN VM storage policy, 'None - stretched cluster' as one of the options for Site disaster tolerance is deprecating, the check will detect if the policy rule has been applied to any VM object. 

Q: What does it mean when it is in a warning state?

The current vSAN Policy applied to the VM(s) does not guarantee that the data is replicated on both data sites of a Stretched Cluster. This may lead to data unavailability in the event of inter-site failure. VMware recommends reviewing the existing storage policies and remediating as necessary. When changing an existing VM’s storage policy settings, vSAN might initiate object recreation and subsequent resynchronization of the objects, make sure the object health and network connection between data sites is green before updating the policy. Navigate to the 'Virtual Objects' view to check which storage policy is applied to the VM.

Q: How does one troubleshoot and fix the warning state?

The issue can be resolved by updating the Site disaster tolerance of the applied policy to either 'None - Keep data on preferred (stretched cluster)' or 'None - Keep data on secondary (stretched cluster)' and re-apply it to all impacted VMs. Make sure the object health and network connection between data sites is green before updating the policy. Navigate to the 'Virtual Objects' view to check which storage policy is applied to the VM.