The Datastore Selection (or validation) wizard for updating the primary datastore times out or loads indefinitely when managing VMFS clusters.

Products

• VMware SDDC Manager / VCF Installer
• VMware Cloud Foundation

Issue/Introduction

The Datastore Selection (or validation) wizard for updating the primary datastore times out or loads indefinitely when managing VMFS clusters.

Environment

VMware Cloud Foundation  9.1.x

Cause

A performance issue during computation in the SDDC Manager UI causes the wizard to time out or hang when handling a large volume of datastores.

Resolution

To update the primary datastore at scale, use the SDDC Manager API rather than the UI.

1. Retrieve Datastore moref ID: Log in to vCenter Server and identify the moref ID for the target primary datastore (e.g., datastore-780).
   
   
   
   
2. Retrieve Cluster ID:  Log in to the SDDC Manager UI and navigate to: 
   Inventory > Workload Domains > [Select Workload Domain] > Clusters > [Select Cluster] 
   Copy the Cluster ID from the URL or cluster details page (e.g., 81c946a-baee-4a48-9046-626f3466a7fe)
   
   
   
   
   
3. Use the PATCH API:
   
   
   • Log in to SDDC Manager and navigate to the Developer Center in the left-hand pane.
   • Expand the Cluster section and locate the PATCH API endpoint.
   • Enter the Cluster ID in the id field.(Retrieved in Step 2)
   • Submit the following payload, replacing  with the value retrieved in Step 1:
   
   

   {
     "clusterPrimaryDatastoreUpdateSpec": {
       "datastoreId": ""
     }
   }