Kubernetes expert for mid-sized companies

Stable systems for companies that want to grow - without losing control

I am Kevin Welter, a Kubestronaut holding all five CNCF certifications and the author of the Kubernetes practical guide published by Rheinwerk Computing.

I build and run production-ready clusters in German cloud infrastructure and hand them over so your own team can run them, instead of depending on me permanently.

For mid-sized companies with grown systems that need Kubernetes as an operating model, not as a project.

Many mid-sized companies today have powerful digital processes. Automations, interfaces, AI workflows.

What's missing isn't innovation.

What's missing is operational reliability.

The Kubernetes Book

Kubernetes: Practical Guide for Developers and DevOps Teams

Rheinwerk Computing 2024, 401 pages, ISBN 978-1-4932-2646-7

My practical guide for developers and DevOps teams - from the basics to a production-ready cluster.

The nine chapters

Preface
Introduction to Kubernetes: basics, architecture, local cluster, kubectl and dashboard, Lens, Raspberry Pi cluster
Basic objects: pods, labels and annotations, deployments and ReplicaSets, ConfigMaps and secrets, services and ingress
Everything as code: declarative configuration, YAML, version control, CI and CD, Kustomize
Advanced objects: DaemonSets, jobs, CRDs, downward API, pod priority
Stateful and storage: StatefulSets, PV and PVC, ephemeral volumes
Governance and security: pod security, admission, policies, RBAC
Ready for production: resources, probes, scaling, monitoring
Helm

Get the book

The German original is published by Rheinwerk Computing under the title “Kubernetes: Das Praxisbuch für Entwickler und DevOps-Teams”.

The real problem isn't technology

Systems work. Until they don't.

Then it becomes clear:

Knowledge is scattered across individuals
Processes aren't clearly separated from operations
Updates, dependencies, and edge cases demand constant attention

The result isn't technical standstill – it's constant mental strain at the executive level.

Kubernetes isn't infrastructure.

Kubernetes is an operating model.

Used correctly, Kubernetes means:

clear responsibilities
reproducible deployments
controlled scaling
clean separation of development and operations

Not as a playground.

But as a stable foundation where systems run without constant intervention.

What we do differently

No "We'll set up Kubernetes for you".

No project without ongoing accountability.

Instead: A production-ready platform – operated, documented, secured.

The goal isn't technical elegance.

The goal is operational stability.

Why German Kubernetes operations matter

Many cloud setups look modern – but are legally and organizationally risky.

Data resides outside the EU
Responsibilities are unclear
Compliance is checkbox-driven, not truly understood

Kubernetes operations in a German cloud provide:

a clear legal framework
full data sovereignty
traceable security concepts

No vendor lock-in.

No black box.

Operations instead of dependency

The problem

The biggest mistake of many setups: Everything works - as long as specific people are available.

The solution

This platform is built so that:

Operations are possible independent of individual knowledge
Decisions are documented traceably
Systems remain transferable
Control stays within the company

Not bound to tools.

Not bound to people.

Who this solution is for

Mid-sized companies with grown system landscapes
Executives who want to delegate responsibility - not risks
Teams that want to scale without constantly catching up

Who it's not for

Hobby projects or test environments
Companies that just want "cheaper hosting"
Setups without standards for operations & accountability

Certified Kubernetes Expertise

Kubernetes operations require deep knowledge. As one of the few Kubestronauts in Germany, I hold all five official CNCF certifications.

Kubestronaut

The Kubestronaut title is awarded by the Cloud Native Computing Foundation (CNCF) to individuals who have successfully completed all five Kubernetes certifications.