1. Connect to the VMware vSphere vCenter Server 8.0 using the Web Client.
Using a web browser connect to the vCenter Server
2. Select the Datacenter.
Select the Datacenter.
3. Right Click.
Select New Cluster.
4. Specify Cluster Name.
Enter a name for the Cluster.
5. Click Next.
Click Finish.
6. Click Add.
In the Quickstart Wizard Click Add.
7. Specify host names.
Add all the hosts using FQDN, root username and password.
8. Click Next.
Click Next and Finish and your host are added to the Cluster.