Error: Failed to run health checks for NSX-T on <ClusterName>

Products

• VMware NSX

Issue/Introduction

• Unable to remediate an ESXi host for a patch or upgrade. Remediation pre-check fails.
• Failed to prepare an ESXi host for the NSX install on a vSphere cluster configured with vLCM.
• The NSX integration may fail with the error: "Unable to set NSX solution to desired state spec. Software Solution com.vmware.nsxt with version <TBD> cannot be found in depot. Image is not valid."

Environment

NSX-T Data Center 3.2.x

NSX 4.x

Cause

• The NSX managers are unable to connect/resolve to vCenter.
• The Compute Manager Connection Status is Down.
• The configured Compute Manager does not have Enable Trust & Create Service Account enabled.

Resolution

Verify Enable Trust & Create Service Account are enabled:

• Via the NSX GUI, System > Fabric >  Compute Managers
• Select the Compute Manager and click on EDIT.
• Re-enter the following:
  • The vCenter Server username and password
  • The "SHA-256 thumbprint"
• Ensure Trust & Create Service Account is enabled.
• Click Save.

OR

Confirm NSX managers can resolve / connect to the configured compute manager:

• SSH to the NSX appliance as admin
• Check the current DNS IPs: 
  get name-servers
• Add a new name server:
  set name-server <DNS_IP>

Note: Only three DNS servers are allowed. If needed, use the following to remove any unwanted DNS server(s).
del name-server <DNS_IP>

Attempt to remediate the host once the Compute Manager connection has been restored.

• A reboot of the NSX manager(s) may be required.

Additional Information

Updating DNS server details for NSX-T Manager cluster