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The VMware Cloud Foundation 9.0.4 Documentation explicitly defines the four key component areas provided by a VKS cluster:

“The components that run in a VKS cluster span four areas: Authentication and authorization, storage integration, pod networking, and load balancing.”

These components are implemented as follows:

Authentication webhook: validates user access tokens.

Container Storage Interface (CSI): integrates with VMware Cloud Native Storage (CNS).

Container Network Interface (CNI): provides pod-level networking (Antrea or Calico).

Cloud Provider Implementation: enables Kubernetes LoadBalancer service creation.

This holistic integration ensures secure, scalable, and production-grade operation of Kubernetes workloads within vSphere Supervisor.

References (VMware Cloud Foundation documents):

VMware Cloud Foundation 9.0.4 Architecture Guide — “VKS Cluster Components.” (pp. 5637–5639)

VMware Cloud Foundation 9.0.4 Workload Management Overview — “VKS Functional Architecture and Services.”

The VMware Cloud Foundation 9.0.2 Design Guide identifies Harbor as the enterprise-grade container registry integrated with vSphere with Tanzu and Supervisor Clusters. It states:

“Harbor provides a cloud-native registry that supports image scanning, replication, and image signing. It is the recommended solution for storing, securing, and distributing container images within VCF environments.”

Harbor integrates with vSphere Namespaces and supports content trust, vulnerability scanning, and image replication across multiple sites — capabilities not available with Docker Hub or Gitea, and only partially supported in Azure ACR.

Therefore, Harbor is the correct and VMware-recommended component for a Supervisor image store that requires enterprise security and replication capabilities.

References (VMware Cloud Foundation documents):

VMware Cloud Foundation 9.0.2 Design and Architecture Guide — “Harbor Image Registry Integration with Supervisor.”

VMware Cloud Foundation 9.0.1 Tanzu Integration Guide — “Using Harbor as the Image Registry for Supervisor Namespaces.”

This is a constraint, as it defines a non-negotiable time limit imposed by the customer’s budgeting timeline. It restricts the design phase’s schedule and deliverables. In VMware conceptual modeling, timing constraints are explicitly captured as constraints rather than requirements or assumptions.

RTO (Recovery Time Objective) measures the maximum downtime tolerated before a service must be restored.

RPO (Recovery Point Objective) measures the maximum tolerable data loss.

In this scenario:

Business-critical workloads tolerate 2 hours of data loss (RPO).

Infrastructure must be operational again within 8 hours (RTO).

Thus, RTO = maximum allowable recovery time for service restoration.