Kubernetes Architecture Diagram Template

What this template is for

A Kubernetes architecture diagram makes your cluster layout readable to everyone on the team — from the engineer who set it up to the SRE who owns the on-call rotation to the manager who needs to understand blast radius. This template covers the core building blocks of a production Kubernetes cluster: worker nodes grouped by workload type, pods running inside those nodes, services routing traffic between them, an ingress controller handling external requests, and persistent storage attached to stateful workloads. Use it in runbook documentation, incident postmortems, onboarding materials, or architecture review meetings.

When to use this template

• Document a production cluster before a major infrastructure migration so the team has a shared baseline.
• Onboard a new engineer by walking through the diagram to explain how traffic flows from ingress to pod.
• Prepare an incident postmortem by annotating which nodes and services were affected.
• Present cluster topology to a non-engineering stakeholder who needs to understand cost and availability zones.
• Plan a namespace refactor by visualizing the current state before drawing the target state.
• Review a security audit checklist against the diagram to identify missing network policies or exposed services.

How to use it

1. 1Identify the workload types in your cluster and group them into worker node categories (frontend, backend, data).
2. 2Add pods inside each worker node to represent the deployed replicas — use the pod shape for clear K8s semantics.
3. 3Connect pods to their corresponding services using straight connectors with no arrowhead.
4. 4Add the ingress controller at the top and draw traffic flow lines from external source through ingress to services.
5. 5Attach a PVC (Persistent Volume Claim) to any stateful pod that requires durable storage.
6. 6Add ConfigMap and Secret nodes near the workloads that consume them to show configuration dependencies.

Quick example