Receiving error about DRS being in a failed state - Error: vSphere DRS functionality was impacted due to unhealthy state of vSphere cluster services

Products

• VMware vCenter Server

Issue/Introduction

• DRS is not functioning and you are seeing below error
  
  vSphere DRS functionality was impacted due to an unhealthy state of vSphere Cluster Services caused by the unavailability of vSphere Cluster Service VMs. vSphere Cluster Service VMs are required to maintain the health of vSphere DRS.


• You are unable to deploy new VM's as it fails with the same error
• Upon reviewing the logs, you see an error with vim.SessionManager.loginExtensionByCertificateInvalidLogin

  Below is the sample screenshot from the logs:
  
  

Environment

VMware vCenter Server 7.x
VMware vCenter Server 8.x

Cause

ESX Agent Manager (EAM) failed to authenticate vCenter due to an expired or invalid vpxd-extension certificate. This prevents EAM from managing vCLS VMs properly, resulting in the cluster service health degradation.

Resolution

Please refer below KB for the resolution steps:
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

Additional Information

Similar issue: vCLS Machines in Orphaned State Due to EAM Login Failure