The virtual infrastructure design includes the software components that make up the virtual infrastructure layer and that support the business continuity of the SDDC.
These components include the software products that provide the virtualization platform hypervisor, virtualization management, storage virtualization, network virtualization, backup and disaster recovery. VMware products in this layer include VMware vSphere, VMware Virtual SAN, and VMware NSX. If you expand the design to dual region, it also includes vSphere Data Protection, and VMware Site Recovery Manager.
Virtual Infrastructure Design Overview
Each region includes a management pod, and a shared edge and compute pod.
Management pods run the virtual machines that manage the SDDC. These virtual machines host vCenter Server, NSX Manager, NSX Controller, vRealize Log Insight, and other shared management components. All management, monitoring, and infrastructure services are provisioned to a vSphere cluster which provides high availability for these critical services. Permissions on the management cluster limit access to only administrators. This protects the virtual machines running the management, monitoring, and infrastructure services.
Shared Edge and Compute Pod
The virtual infrastructure design uses a shared edge and compute pod. The shared pod combines the characteristics of typical edge and compute pods into a single pod. It is possible to separate these in the future if required.
This pod provides the following main functions:
Supports on-ramp and off-ramp connectivity to physical networks
Connects with VLANs in the physical world
Hosts the SDDC tenant virtual machines
The shared edge and compute pod connects the virtual networks (overlay networks) provided by NSX for vSphere and the external networks. An SDDC can mix different types of compute-only pods and provide separate compute pools for different types of SLAs.