Change the vSAN Witness Host in a Stretched Cluster

You can replace or change the vSAN witness host for a stretched cluster using the vSphere Client without affecting life cycle operations of SDDC Manager.

Prerequisites

Verify that the vSAN witness host is not in use by another cluster, has a VMkernel configured for vSAN traffic, and has no vSAN partitions on its disks.

Procedure

1. In a web browser, log in to vCenter Server at https://vcenter_server_fqdn/ui.
2. Select Menu > Hosts and Clusters.
3. In the inventory panel, expand vCenter Server > Datacenter.
4. Select the stretched cluster and click Configure.
5. Under vSAN, click Fault Domains.
6. Click the Change button.
7. Select a new host to use as the vSAN witness host and click Next.
8. Claim disks on the new witness host and click Next.
9. Review the configuration and click Finish.