15 posts tagged with "kubernetes"

Last week I returned from KCD UK where I led a workshop introducing people to vCluster (try it yourself here). At the workshop and at our booth, we fielded dozens of questions from people with wildly different backgrounds.

Some attendees had deep Kubernetes expertise but had never heard of virtual clusters. Others worked with containers daily and were exploring the orchestration layer. People came from different knowledge bases and experience levels.

The most common question? "What is vCluster, and why would I need it?"

The short answer: vCluster is an open-source solution that enables teams to run virtual Kubernetes clusters inside existing infrastructure. These virtual clusters are Certified Kubernetes Distributions that provide strong workload isolation while running as nested environments on top of another Kubernetes cluster.

But to understand why that matters—and whether you need it—you need to see how we got here.

Building a Deterministic vCluster Validation MCP Server to Ground AI in Real Schemas

You ask an AI to generate a Kubernetes manifest, Helm chart values, or Ansible playbook. It responds instantly with clean, well-formatted YAML. You apply it. Nothing works.

This isn't a bug—it's AI hallucination. The AI knows YAML syntax but hallucinates config options that don't exist, mixes incompatible versions, or confidently suggests deprecated fields. It generates what looks right based on patterns, not what is right according to actual schemas.

Photo by Growtika on Unsplash

In today's cloud-native landscape, GPU workloads are becoming increasingly critical. From training large language models to running inference APIs, organizations are investing heavily in GPU infrastructure. But with this investment comes a challenge: how do you safely test and deploy new GPU schedulers without risking your entire production environment?

Related talks: Watch my SREDay Paris Q4 2025 talk on this topic. Also presenting at Conf42 Kube Native 2025. Check the talks page for more details.

Photo by Mia Golic on Unsplash

This article will be helpful for anyone interested in setting up a local Kubernetes dev/test environment in a reproducible and easy way. Source code for this blog is available in this companion repository.

Photo by Markus Winkler on Unsplash

Introduction​

Using runbooks can streamline and improve working with Kubernetes by automating repeatable tasks. Bonus point, we can do this using only open source tools.

This article is will be helpful to anyone interested in modern complex software development.

Overview​

This documentation assumes basic knowledge of Kubernetes and kubectl. To learn or refresh on container orchestration related concepts, please refer to the official documentation:

GitOps with Kubernetes​

Introduction​

In 2017, a cloud-native company Weaveworks release a blog post called “GitOps — Operations by Pull Request”. The post introduces the term GitOps defining it as *using Git as a source of truth to operate almost anything. *Since then GitOps movement has been growing and gaining in popularity.

How to create Kubernetes home lab on an old laptop​

Introduction​

I’ve recently “discovered” and old laptop forgotten somewhere in the depths of my basement and decided to create a mini home lab with it where I could play around with Kubernetes.

Cloud Native - Developer Workflow​

Software Development Lifecycle with Kubernetes and Docker​

Introduction​

Software development tooling and processes have evolved rapidly in last decade to meet growing needs of developers. On top of mastering, often a few, programing languages and paradigms, software developers must learn to navigate increasingly complex landscape of tools and processes.