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Edouard Topin's Blog
VKS on VCF 9 / Series 01/05

The new VCF 9 architecture explained to architects

VCF 9 is not a minor upgrade: it's a complete overhaul of the operational model. What a cloud architect must understand before any adoption project.

Edouard Topin
5 min read
VMware Cloud Foundation 9 — architecture overview

If you open a VCF 9 deployment console with VCF 5.x reflexes, you’re lost in thirty seconds. SDDC Manager is no longer the entry point, the eleven licenses became two, and several taken-for-granted features are gone. It’s not an upgrade: it’s an architectural reset.

Removed featuresSimplified licensingRefactored operational model

The rupture in three points

Broadcom applied its standard playbook to the VMware portfolio: radical simplification, SKU consolidation, pruning legacy features. VCF 9 is the visible translation on the private cloud side — a unified platform for VMs, Kubernetes, and AI workloads, with a coherent operational model.

The trade-off is an intentional rupture with several historical design patterns:

  • Refactored hierarchy — Fleet / Instance / Private Cloud replace workload domains
  • Shifted center of gravity — VCF Operations orchestrates, SDDC Manager executes
  • Removed features — vVols, SIOC, ELM, Host Profiles, IWA: document before migration

The new three-level hierarchy

Fleet / Instance / Private Cloud hierarchy in VCF 9
Level Role VCF 5.x equivalent
Private Cloud Logical consumption unit
Fleet Governance, licensing, compliance, patching Management domain
Instance Physical deployment (clusters + vCenter) Workload Domain

The first question in VCF 9 is no longer “how many workload domains” but “how many Fleets, by what boundary” — geographic, regulatory, or business-driven.

VCF Operations: the new center of gravity

Gravity shift: from SDDC Manager to VCF Operations between VCF 5.x and VCF 9

VCF Operations now orchestrates the complete fleet lifecycle:

  • License management and usage submission
  • Certificate renewal and identity
  • Fleet-wide patching and lifecycle
  • Continuous compliance, monitoring, log analysis
  • Native cost & capacity management (showback/chargeback, forecasting)

SDDC Manager retains an executor role — no longer the orchestrator. For organizations relying on Aria Operations + custom extensions, the switch represents both simplification and loss of customization.

VCF Automation: the unified self-service layer

The Aria Automation replacement, rethought to integrate the Fleet model. Two portals structure the experience:

Provider Portal

Platform administrator: organizations, capacity allocations, global policies, multi-tenant management.

Organization Portal

Consumer: projects, blueprints, catalog items, VM deployments, VKS, VPC, volumes, secrets.

The catalog covers VMs, Kubernetes (VKS), networks (VPC), persistent volumes, secrets, databases (DSM), Harbor registries. Entry points: UI, CLI, REST API, and a Kubernetes IaaS API exposing resources via kubectl — key for GitOps teams.

VCF Automation is mandatory for any multi-tenant deployment and strongly recommended for industrialization.

Virtual Private Cloud: accessible networking

VPC architecture on top of NSX in VCF 9
Self-service abstraction on top of NSX. Subnets, routing, security groups exposed with a model close to AWS/Azure VPC. The vSphere admin creates isolated networks without writing a single NSX policy. Visual creation in vCenter, policies applied by default.
Drastically lowers the networking barrier. A project that would demand a dedicated network architect can be scoped by a generalist. Makes VCF Automation truly usable in multi-tenant without NSX expertise on the tenant side.
VPC by default for 80% of cases: tenant isolation, app segmentation, exposure via managed load balancer. NSX direct for the remaining 20%: multicast, fine-grained traffic mirroring, complex N-tier architectures, advanced BGP integrations. Under the hood, VPC still runs on NSX — it’s a simplified control layer, not a new data plane.

Identity Broker: unified authentication at Fleet level

VCF 9 introduces a unified Identity Broker supporting SAML and OIDC, applied globally except ESX and SDDC Manager which retain local configuration. Single source of truth for audit and compliance.

The trade-off: removal of Integrated Windows Authentication (IWA). Environments relying on IWA for vCenter must migrate to LDAPS or external identity federation.

What disappeared in VCF 9

Never assume a VCF 5.x feature is present in VCF 9 without explicit verification in release notes.

What arrived: the features that matter

FIPS 140-3 by default

Non-disablable. All components (vCenter, ESX, NSX) in FIPS mode. Validate for third-party integrations.

NVMe memory tiering

Flash NVMe as 2nd tier. Ideal for JVM-heavy, analytics, HFT. Slower tier — not free RAM.

vMotion for AI

Live migration of GPU-heavy workloads with near-zero downtime. Significant shift for AI on VCF.

Global deduplication

Cluster-wide scope vs disk-level. Real capacity gains without post-process performance impact.

Automatic vTopology

Detection and correction of misconfigured vCPU/vNUMA. End of a recurring support ticket source.

1 GbE management (9.0.2)

Officially supported for import workflows. Unblocks brownfield sites without 10 GbE budget.

7 design decisions to settle before adopting

1. How many Fleets?

Geographic, regulatory, or business — one axis, assumed. Commits governance for years.

2. Connected or air-gapped?

Impacts licensing (auto vs manual submission), patch management, and observability.

3. VPC or NSX direct?

VPC by default, NSX direct for exceptions. Document cases that shift to NSX direct.

4. VCF Automation from day 1?

Yes if multi-tenant or strong IaC needs. After if starting single-tenant with non-automation team.

5. Greenfield or brownfield?

9.0.2 improved import workflows including 1 GbE networks. Brownfield option genuinely viable.

6. Converge or rebuild?

Official path since vSphere 8. Evaluate by age and technical debt of existing environment.

7. Identity Federation: which IdP?

Entra ID, Okta, Ping — decision with IAM team, not in platform silo.

Each deserves a dedicated chapter in your architecture document. Without formal arbitration, it’s a deployment, not an architecture project.

Conclusion: three things to remember

New hierarchy

Fleet / Instance / Private Cloud — VCF 5.x workload domains are no longer the right mental model.

Recentered hubs

VCF Operations orchestrates, VCF Automation exposes self-service. SDDC Manager is no longer the entry point. RACI must reflect this.

Non-trivial removals

vVols, SIOC, ELM, Host Profiles, IWA — catalog early to avoid migration surprises.

For further reading: Broadcom’s VCF 9.0 Release Notes, the Paths to Adoption guide on the VCF Blog, and from the community William Lam and vrealize.it deep-dives.

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