Your Cloud Foundation system's management domain and deployed workload domains are logical units that carve up the compute, network, and storage resources of the entire system. The logical units are groups of ESXi hosts managed by vCenter Server instances with specific characteristics for redundancy and VMware SDDC best practices.
The management domain and workload domains include these VMware capabilities by default:
- VMware vSphere® High Availability (HA)
- In a VMware virtual environment, this feature supports distributed availability services for a group of ESXi hosts, to provide rapid recovery from outages and cost-effective high availability for applications running in virtual machines. When DRS is configured and one of the hosts in the group becomes unavailable, all virtual machines on that host are immediately restarted on another host in the group. For more information about vSphere HA, see the vSphere Availability documentation at https://docs.vmware.com/en/VMware-vSphere/.
- VMware vSphere® Distributed Resource Scheduler™ (DRS)
- In a VMware virtual environment, this feature dynamically allocates and balances computing capacity across a group of hardware resources aggregated into logical resource pools. DRS continuously monitors uses across resource pools and allocates available resources among the virtual machines based on predefined rules that reflect business needs and changing priorities. When a virtual machine experiences an increased load, vSAN DRS automatically allocates additional resources by redistributing virtual machines among the physical servers in the resource pool. For more information about DRS, see the vSphere Resource Management documentation at https://docs.vmware.com/en/VMware-vSphere/.
- VMware vSAN®
- In a VMware virtual environment, this component aggregates local and direct-attached storage disks in a group of ESXi hosts to create a storage pool shared across all hosts in that group. For more information about vSAN, see the VMware vSAN documentation at https://docs.vmware.com/en/VMware-vSAN/.
By default, the Cloud Foundation system has a management domain dedicated to infrastructure and management tasks . The management domain is automatically provisioned when you perform bring-up on a rack and includes the hosts you selected during bring-up. The Cloud Foundation software stack is deployed on the management domain. When you add racks to your system, the management domain automatically covers the additional racks. If you run out of resources, you can expand the management domain by selecting eligible hosts on any rack in your system.
- Resources (CPU, memory, and storage)
If you have deployed Cloud Foundation six or fewer hosts, the deployment is based on the consolidated architecture. Since you do not have enough hosts to create a workload domain, you can utilize part of the capacity on the management domain by creating workload VMs and adding them to the management domain.
- Deploys the vSphere environment and configures it for vSAN and enables vSphere HA and DRS, if required by your selected availability policy
- Configures the virtual networks, including the appropriate NSX for vSphere elements, as appropriate for the specified workload domain configuration
- Integrates the workload domain's resources with the appropriate pieces in the Cloud Foundation software stack
The result is a workload-ready SDDC environment.
Each Cloud Foundation instance is one SSO domain to which all vCenter Servers are joined. The maximum number of supported workload domains and vCenter Servers per Cloud Foundation instance depends on the vSphere version in the management cluster. For more information, see the Configuration Maximums vSphere document.
The Dashboard page displays high-level information about the management and workload domains that are deployed in your system. From the Dashboard page, you can drill-down to details on each management and workload domain by using the View Details button.