vSphere DRS functionality was impacted due to the unhealthy state of vSphere Cluster Services caused by the unavailability of vSphere Cluster Service VMs.

Products

• VMware vCenter Server

Issue/Introduction

• A red banner alert appears on the Cluster Summary Tab indicating that the cluster is on an unhealthy state due to unavailability of vSphere Cluster Service VMs (vCLS).
  
  
• vSphere Cluster Service VMs (vCLS) are not been deployed in the cluster.
  
  
• ESX Agent Manager (EAM) logs indicate that the service is not able to authenticate to vCenter:
  
  /var/log/vmware/eam/eam.log
  
  yyyy-mm-ddThh:mm:ss.hhh | ERROR | eam-0 | VcConnection.java | 179 | Failed to login to vCenter as extension. vCenter has probably not loaded the EAM extension.xml yet.: Cannot complete login due to an incorrect user name or password.
  
  

Environment

vCenter Server 8.x
vCenter Server 7.x

Resolution

To address the issue follow resolution steps from KB article 318255 - EAM "Failed to login to vCenter as extension, Cannot complete login due to an incorrect user name or password" after replacing the vCenter Server certificates