SDDC Manager configures the first four servers in each physical rack into an entity called the management domain. After you deploy Cloud Foundation, you can expand the management domain.
The management domain manages the hosts in that rack. All disk drives are claimed by vSAN.
The management domain contains the following:
vCenter Server Appliance(including both vCenter Server and Platform Services Controller as separate VMs) managing the vSphere cluster with HA and DRS enabled.
The following VMs:
vRealize Log Insight