The management domain and deployed VI workload domains are logical units that carve up the compute, network, and storage resources of the VMware Cloud Foundation system. The logical units are groups of ESXi hosts managed by vCenter Server instances with specific characteristics for redundancy and VMware SDDC best practices.
For information on Horizon domains, see Working with Horizon Domains.
The management domain is created by default during bring-up. The VMware Cloud Foundation software stack is deployed on the management domain. Additional infrastructure virtual machines which provide common services, such as backup or security appliances, can be deployed in the management domain as well.
The management domain and workload domains include these VMware capabilities by default:
- VMware vSphere ® High Availability (HA)
- 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. Out of the box, VMware Cloud Foundation provides a highly available environment for workload domains. There may be additional settings (not set by default) that can increase availability even further. 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)
- This feature dynamically allocates and balances computing capacity across a group of hardware resources aggregated into logical resource pools or clusters. Clusters are the primary unit of operation in VMware Cloud Foundation. DRS continuously monitors use 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, vSphere 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 ®
- This component aggregates local 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/.
- VMware NSX Automated Backup
- It is crucial to take backups of all NSX components to restore the system to its working state in the event of a failure. VMware Cloud Foundation automatically configures the NSX Manager applications to back up their state to a user-supplied SFTP server. These backups contain all of the NSX configuration, including controllers, logical switching and routing entities, security, firewall rules, and everything else that you configure within the NSX Manager UI or API. The vCenter database and related elements like the virtual switches need to be backed up separately.
Each VMware 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 VMware Cloud Foundation instance depends on the vSphere version in the management cluster. For more information, see the Configuration Maximums vSphere document.
