NSX Alarm "The number of objects defined in the system for vSphere Clusters Prepared for NSX has reached 5 and is at or below the maximum supported count of 5."

Products

• VMware NSX

Issue/Introduction

• The vSphere cluster count in the NSX Capacity Dashboard UI shows an alarm with the message:
  "The number of objects defined in the system for vSphere Clusters Prepared for NSX has reached 5 and is at or below the maximum supported count of 5."
  
  
• The user only has 5 clusters configured. 
  
  
• User configured 6th vSphere cluster with a host that is in an orphaned state, meaning the host is still a Transport Node (has NSX on it).
  But the cluster does not have any transport node profiles.
  
  
• NSX Manager/var/log/syslog shows similar output to the following.
  

  Host configuration: Failed to send the HostConfig message. [TN=TransportNode/######-####-####-##########]. Reason: Failed to send HostConfig RPC to MPA node:######-####-####-##########. Error: Unable to reach client ######-####-####-##########, application SwitchingVertical.

Environment

VMware-NSX

Cause

NSX does have a 6th vSphere cluster with an orphaned TN.

Resolution

The customer can use the following API to get a list of all vSphere clusters. 

GET https://{{nsx-manager}}/api/v1/capacity/usage

Resolve the error in the orphaned Transport Node, and the alarm will be resolved.

Additional Information

How to Identify Orphan or Stale Host Entries in NSX Manager?