After update of ESX, NSX appears to be partially installed on host.

Products

• VMware NSX
• VMware vSphere ESX 8.x

Issue/Introduction

After upgrading from ESX 7.x to 8.x you have the following error in your NSX GUI for specific hosts:

Transport Node Errors

    Host configuration: Cannot perform install due to an existing VM on the host. Please put ESX in the maintenance mode and retry.;

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Environment

vSphere 8.0U3x

NSX 4.2 and above

 

Cause

During the upgrade of ESX on the host, there was a VM that was unable to be vacated preventing the host from entering Maintenance Mode, and performing the final reboot.

Resolution

In vCenter, manually put the host in Maintenance Mode, and reboot the host. Then take it out of Maintenance Mode.

See "Place an ESXi host in Maintenance Mode in the VMware Host Client"

This will allow the upgrade to complete final steps, including replacing NSX vibs.