VMware Cloud Foundation - Design Decision - When using a single availability zone, the shared edge and workload cluster requires a minimum of 4 ESXi hosts to support vSAN.

Products

• VMware
• VMware Cloud Foundation

Issue/Introduction

Design Decision: When using a single availability zone, the shared edge and workload cluster requires a minimum of 4 ESXi hosts to support vSAN.

Resolution

Design Justification: Having 4 ESXi hosts addresses the availability and sizing requirements.
You can take an ESXi host offline for maintenance or upgrades without impacting the overall vSAN cluster health.

Design Implication: The availability requirements for the shared edge and workload cluster might cause under utilization of the cluster's ESXi hosts.

This design decision is supported in the following Domains. 
•    Management Domain
•    VI Workload Domain

This design decision is supported on VCF version 4.1 and higher. 

Note: To search for additional information on this design decision please search on the design decision text in https://docs.vmware.com/. For example https://docs.vmware.com/en/search/#/%22Enable%20Network%20I%2FO%20Control%20on%20all%20distributed%20switches.%22

Additional Information

Please reference the VMware Cloud Foundation version you are running and if this design decision is applicable to you. 

VMware Validated Design (VVD) Bill of Materials