Cluster fails to join due to the reinstalled host not able to establish connectivity to the remote datastore over the L3 network during the validation phase

Products

• VMware SDDC Manager / VCF Installer

Issue/Introduction

• Add Host Workflow Failing at GeneratePreValidateHostRemoteDatastoreL3InputAction
  
  
• Add Host Task Failing with Health Check Error

Environment

VMware SDDC Manager 5.X

Cause

The Add Host workflow fails during the GeneratePreValidateHostRemoteDatastoreL3InputAction action, this indicates that there is XVC (Cross-vCenter) datastore mounted from the affected cluster.

Note: During workflow execution, the datastore object conversion task encounters an unsupported type, that causes a type-cast failure and ends the workflow.

A subsequent Add Host attempt failed at guardrail validation stage. The guardrail performs a host-count consistency check between the SDDC Manager inventory and the vCenter inventory. This is because, the host is associated with the cluster in SDDC Manager inventory but is not present in the vCenter cluster leading to an inventory state mismatch.

Resolution

1. Upgrade setup to 9.1 if there is a stretched cluster OOB handled.
   
   
2. Upgrade setup to 9.0.2 and manage cluster directly from vCenter and run sync operation.
   
   

Workaround:

For Manually add host to vCenter and configure NSX-T, please submit a Support Request with Broadcom Support for guidance.