Click on your newly-created cluster in the left hand column menu and then click on 'Add Host' to bring up the Add Host dialog.
Provide the following information in the Add Host dialog.
Cluster: This should be the newly-created cluster.
Host name. For Xen and KVM this is the DNS name or IP address of the XenServer host or KVM host.
User name. Usually the root user
The password for the above user
It may take a minute for the host to be provisioned. It should automatically display in the UI.
