vSAN -- ESXi Host vSAN Storage is down after moving vSAN Cluster to another vCenter

Products

• VMware vSAN
• VMware vSAN 7.x
• VMware vSAN 8.x

Issue/Introduction

After moving vSAN Cluster to a new vCenter one or more of the following issues are being observed:

 

• New vCenter: vSAN Skyline Health is reporting: vSAN object health: red

Location: vSAN Cluster --> Monitor --> vSAN --> Skyline Health

The details of "vSAN object health" showing many Objects in state "Reduced Availability", while no Resync is going on 

 

 

• New vCenter: When trying to power on a VM the following error is received:

Module MonitorLoop power on failed. Failed to start the virtual machine. Failed to power on VM. Could not power on virtual machine: Failure.

Failed to create swap file '/vmfs/volumes/vsan:###########/########/######.vswp' : Failure

 

Sample Output:

 

 

• New vCenter: vSAN Skyline Health is reporting: vSAN Cluster Configuration Consistency: Issue: "Deduplication and Compression is enabled but should be disabled"

Sample Output:

 

Environment

vSAN 7.x

vSAN 8.x

 

Cause

In the new vCenter, the vSAN Configuration is not complete.

 

Resolution

1.) In the new vCenter: Enable "Deduplication and Compression" by hitting "Remediate Inconsistent Configuration" shown in the screenshot above

2.) In the new vCenter: Ensure that the Storage Policies assigned to VMs located on vSAN have the same settings as the Storage Policies used for these VMs in the old vCenter

See Step 8 in KB 326849 for more information

 

Additional Information

KB 326849: Moving a vSAN Cluster from one vCenter Server to another (= Migrating )