Restoring a vCenter Server Appliance directly to an ESXI host from an Image-Based Backup using third party backup tool.

Products

• VMware vSphere ESXi

Issue/Introduction

When a vCenter Server Appliance (VCSA) fails or becomes corrupted, it may need to be recovered using a third-party image-based backup solution (e.g., using vSphere APIs for Data Protection / VADP). Because the vCenter Server is unavailable during a failure, the restore operation cannot be orchestrated through the vSphere Client. This article outlines the procedure to restore the VCSA directly to an ESXi host.

Environment

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

Cause

If the vCenter Server is offline, third-party backup tools lose their primary management endpoint for initiating restores. To recover the appliance, the backup tool must bypass vCenter and connect directly to a standalone ESXi host to orchestrate the virtual machine recovery and register it into the host's local inventory.

Resolution

To restore a vCenter Server Appliance from an image-based backup tool when vCenter is down, follow these steps:

1.Power Off the Original vCenter VM: Ensure the existing, corrupted vCenter Server Appliance is completely powered off to prevent MAC address or IP conflicts when the restored VM is powered on.

2.Configure Backup Tool for Direct Host Access: In your third-party backup software, select the option to perform a full virtual machine restore.

• Point the restore target directly to the IP address or FQDN of the desired ESXI host, rather than the vCenter Server.
• Provide Host Credentials: Enter the root credentials for the target ESXI host within the backup tool to authenticate the connection.
• Initiate the Restore: Start the restore process. The backup software will write the VCSA virtual machine files directly to the ESXI host's datastore and register the VM in the host's local inventory.
• Power On the Restored VM: Once the restore is complete, log in directly to the target ESXI host using the VMware Host Client (https://<ESXi_IP_or_FQDN>/ui).

3.Locate the restored vCenter VM and power it on.

• Verify Service Initialization: Wait several minutes for the vCenter services to initialize.
• You can verify service startup from the VCSA console using service-control --status --all.

4.Perform VAMI Reconciliation (If Prompted): Navigate to the vCenter Server Appliance Management Interface (VAMI) at https://<vCenter_FQDN_or_IP>:5480.

• If there is a change in the vCenter appliance data that needs to be synchronized, a reconciliation window will be displayed automatically.
• Input the root password and click Log In, then click Next.
• Input the Single Sign-On (SSO) administrator credentials and click Finish.
• Wait 15-30 minutes for the reconciliation to complete.
• If no data changes require synchronization, the standard VAMI login screen will be displayed, indicating vCenter is ready for use.