In this blog post, let's quickly go through the steps which we need to follow to configure a vSAN Stretched Cluster manually.
Please make sure the following conditions are satisfied before moving on with the configuration.
A minimum of three hosts are required: one for the primary site, one for the backup site, and one host to serve as a witness.
Verify that you have configured one host to serve as the witness host for the stretched cluster. Verify that the witness host is not part of the Virtual SAN cluster, and that it has only one VMkernel adapter configured for Virtual SAN data traffic.
Verify that the witness host is empty and does not contain any components. To configure an existing Virtual SAN host as a witness host, first evacuate all data from the host and delete the disk group.
Steps to configure a Stretched Cluster -
Navigate to the vSAN cluster.
Click the Configure tab.
Under vSAN, click Fault Domains.
Click Configure Stretched Cluster to open the stretched cluster configuration wizard.
Select the hosts that you want to assign to the secondary fault domain and click >>.The hosts that are listed under the Preferred fault domain are in the preferred site.
Click Next.
Select a witness host that is not a member of the vSAN stretched cluster and click Next.
Claim storage devices on the witness host and click Next. For vSAN Original Storage Architecture, select devices for cache and for capacity. For vSAN Express Storage Architecture, select compatible flash devices or enable I want vSAN to manage the disks.
On the Ready to complete page, review the configuration and click Finish.
With this the vSAN stretched cluster has been created. As soon as the configuration is complete, it is essential to understand and create a vSAN storage policy for the stretched cluster in order to safeguard the virtual machines spread throughout the various sites.
Quickstart can also be used to configure the Stretched Cluster. For more information, please refer to this VMware Documentation.
Thank you for reading!
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