Error when switch cluster to image mode: A general system error occurred: Error occurred while checking whether NSX-T Data Center is enabled on this cluster.

Products

• VMware vCenter Server

Issue/Introduction

The below error is returned when switching a cluster from baseline to image mode:

Check cluster's eligibility to be managed with a single image: A general system error occurred: Error occurred while checking whether NSX-T Data Center is enabled on this cluster.

Environment

vCenter server 8.0

Cause

NSX-T extension is installed in vCenter but not configured

Resolution

To verify if the NSX-T Manager extension is installed, please follow the steps below:

In the vCenter server, Select Menu > Administration > vCenter Server Extensions and check if there is NSXT-T Manager.

Please perform the steps below to remove the extension.

Note: Take a snapshot of the vCenter server before performing the steps below. (VMware vCenter in Enhanced Linked Mode pre-changes snapshot (online or offline) best practice)

1. Access the vCenter server MOB page using the <https://vCenter_ip_or_fqdn/mob> link.
2. Log in using the SSO credentials (eg: [email protected])
3. Click on Content > ExtensionManager.
4. Copy the name of the NSX-T extension
   
   eg: com.vmware.nsx.management.nsxt
   
   
5. Select the 'UnregisterExtension' option at the bottom of the MOB page.
6. Enter the name of the extension in the 'extensionkey' field and click on Invoke method.
7. Then restart the vsphere-ui service by running the below command in an SSH session connected to the vCenter server.
   
   service-control --restart vsphere-ui