You can remove any cluster in an SDDC except for the initial cluster, Cluster-1.
When you delete a cluster, all workload VMs in the cluster are immediately terminated and all data and configuration information is deleted. You lose API and UI access to the cluster. Public IP addresses associated with VMs in the cluster are released.
Prerequisites
- Migrate any workload VMs that you want to keep to another cluster in the SDDC.
- Make a copy of any data that you want to retain.