iiinova — where your digital self keeps evolving

Márk Sági-Kazár @sagikazarmark.com · 21/09/2026

CFP for @kcdbudapest.hu ended last week. I just scrolled through the submitted sessions, and some of the titles genuinely made me laugh. 😄 Lot of great content, so this looks to be yet another great KCD after last year. If you want to attend, don’t miss the early bird price: kcdbudapest.hu/

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Márk Sági-Kazár @sagikazarmark.com · 17/09/2026

Thanks for the warning. I was just about to update. I guess I won't until I have to.

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Márk Sági-Kazár @sagikazarmark.com · 02/04/2026

Chilling by Lake Balaton with great coffee (at The Rusty Box), while working on some new iximiuz Labs content.

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Reposted by Márk Sági-Kazár

Marcus Noble @averagemarcus.bsky.social · 25/03/2026

🎉 Today's the day! 🎉 Come see myself and @sagikazarmark.com chatting about our experience with the oddities in Kubernetes that we've experienced over our careers. This is going to be a fun one! 11:45am Hall 7 - Room A kccnceu2026.sched.com/event/2CW2p/...

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Márk Sági-Kazár @sagikazarmark.com · 23/03/2026

🚨 KUBERNETES THE VERY HARD WAY IS COMPLETE! The complete course is now available on iximiuz Labs: labs.iximiuz.com/courses/kub... If you want to learn how Kubernetes works under the hood, this course is for you.

labs.iximiuz.com

Kubernetes the (Very) Hard Way (course) | iximiuz Labs

A hands-on, step-by-step guide to assembling a Kubernetes cluster from the ground up, (without using any automation) while deeply exploring each component's role and functionality along the way.

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Márk Sági-Kazár @sagikazarmark.com · 16/03/2026

Kubernetes networking is complex. But that doesn't mean it's impossible to understand. Break it down into smaller pieces and you'll see how it all connects. The next lesson of Kubernetes the Very Hard Way discusses this topic: labs.iximiuz.com/courses/kub... #Kubernetes

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Márk Sági-Kazár @sagikazarmark.com · 11/03/2026

KubeCon is in less than two weeks. If this is your first time, I gathered a few thoughts on how to navigate the conference without getting completely lost (or tired) on day one: sagikazarmark.com/blog/posts/... #kubecon

sagikazarmark.com

How to KubeCon

KubeCon + CloudNativeCon is the flagship cloud native conference. It happens multiple times a year on different continents, and every edition is massive.…

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Márk Sági-Kazár @sagikazarmark.com · 10/03/2026

When did installing prebuilt binaries using npm become the standard?

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Márk Sági-Kazár @sagikazarmark.com · 06/03/2026

TLS bootstrapping is how worker nodes securely join a Kubernetes cluster without manually distributing certificates. The next lesson in "Kubernetes the Very Hard Way" covers the entire process of forming a functional cluster from control plane and worker components. labs.iximiuz.com/courses/kub...

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Márk Sági-Kazár @sagikazarmark.com · 05/03/2026

You've got a control plane and a worker node. Now what? The next lesson in "Kubernetes the Very Hard Way" walks through joining a worker node to the cluster, including TLS bootstrapping and certificate management. Available on iximiuz Labs: labs.iximiuz.com/courses/kub...

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Márk Sági-Kazár @sagikazarmark.com · 26/02/2026

The final control plane lesson in Kubernetes the Very Hard Way, introducing kube-controller-manager, is out: labs.iximiuz.com/courses/kub... Next stop: assembling a functional cluster!

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Márk Sági-Kazár @sagikazarmark.com · 19/02/2026

Ever wondered how Kubernetes decides which node runs your pod? The next lesson in "Kubernetes the Very Hard Way" covers kube-scheduler, the component that handles pod placement decisions. Available on iximiuz Labs: labs.iximiuz.com/courses/kub...

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Márk Sági-Kazár @sagikazarmark.com · 17/02/2026

Pods don't just randomly land on nodes. kube-scheduler evaluates every placement based on resource availability, constraints, and policies. The next lesson in "Kubernetes the Very Hard Way" breaks down how kube-scheduler operates under the hood. labs.iximiuz.com/courses/kub...

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Márk Sági-Kazár @sagikazarmark.com · 12/02/2026

Have you ever used curl to interact with the Kubernetes API or observed what is stored in etcd after executing kubectl apply? The next lesson in Kubernetes the Very Hard Way explores how kube-apiserver integrates into Kubernetes and operates under the hood: labs.iximiuz.com/courses/kub...

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Márk Sági-Kazár @sagikazarmark.com · 10/02/2026

If you've followed along with Kubernetes the Very Hard Way, it was worth it, because now the real fun begins: By adding kube-apiserver to the mix, you can learn how the component you interact with daily works under the hood. labs.iximiuz.com/courses/kub...

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Márk Sági-Kazár @sagikazarmark.com · 05/02/2026

etcd is a highly available, strongly consistent key-value store that supports Kubernetes by storing all its state. The next lesson in "Kubernetes the Very Hard Way," discussing etcd, is available on iximiuz Labs: labs.iximiuz.com/courses/kub...

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Márk Sági-Kazár @sagikazarmark.com · 03/02/2026

After discussing the worker node components, it's time to move on to the control plane. The next lesson in "Kubernetes the Very Hard Way" begins with a discussion on the control plane components, starting with etcd. labs.iximiuz.com/courses/kub...

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Márk Sági-Kazár @sagikazarmark.com · 29/01/2026

Did you know you can run pods on a Kubernetes node without a control plane? Or that you can communicate directly with the kubelet via its API? Check out my "Kubernetes the Very Hard Way" course's next lesson that provides an in-depth view of kubelet: labs.iximiuz.com/courses/kub... #Kubernetes

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Márk Sági-Kazár @sagikazarmark.com · 27/01/2026

Kubelet is the "hands and feet" of Kubernetes: it's the component sitting on every node making desired state a reality. The next lesson of "Kubernetes the Very Hard Way" provides an in-depth view of kubelet. Available on iximiuz Labs: labs.iximiuz.com/courses/kub... #Kubernetes

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Márk Sági-Kazár @sagikazarmark.com · 22/01/2026

Check out my new course, "Kubernetes the Very Hard Way," on iximiuz Labs to learn how containerd allows Kubernetes to manage thousands and thousands of containers: labs.iximiuz.com/courses/kub.... The course is free for a limited time, so enroll now!

labs.iximiuz.com

Kubernetes the (Very) Hard Way (course) | iximiuz Labs

A hands-on, step-by-step guide to assembling a Kubernetes cluster from the ground up, (without using any automation) while deeply exploring each component's role and functionality along the way.

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Márk Sági-Kazár @sagikazarmark.com · 22/01/2026

Containerd is the default container runtime for Kubernetes. However, we seldom interact with containerd directly or fully understand the components involved in effectively managing containers.

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Márk Sági-Kazár @sagikazarmark.com · 20/01/2026

PagerDuty calls: your app hosted on Kubernetes is not available. What's the first thing you do / command you run? #Kubernetes

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Márk Sági-Kazár @sagikazarmark.com · 20/01/2026

Over the next 10 weeks, I'll release a new lesson each week, starting with containerd (available today). The course is free for a limited time, so enroll now! #Kubernetes

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Márk Sági-Kazár @sagikazarmark.com · 20/01/2026

Inspired by Kelsey Hightower's "Kubernetes the Hard Way," this course guides you through manually building a Kubernetes cluster from scratch in a lab environment, without the hassle of setting up VMs.

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Márk Sági-Kazár @sagikazarmark.com · 20/01/2026

Ever wanted to peek under the hood of Kubernetes and discover what makes it tick? Now you can. After months of effort, my new course, "Kubernetes the Very Hard Way," is live on iximiuz Labs: labs.iximiuz.com/courses/kub....

labs.iximiuz.com

Kubernetes the (Very) Hard Way (course) | iximiuz Labs

A hands-on, step-by-step guide to assembling a Kubernetes cluster from the ground up, (without using any automation) while deeply exploring each component's role and functionality along the way.

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Márk Sági-Kazár @sagikazarmark.com · 19/01/2026

Built a product in 2 days with AI. I'm a backend dev who avoids frontend. But I had a problem to solve, so I let Claude Code take the wheel. Result: talkpulse.app - simple audience feedback for speakers The honest truth: AI is amazing at writing code. Less amazing at not creating a mess.

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Márk Sági-Kazár @sagikazarmark.com · 16/01/2026

Bottom line: Claude is not a mind reader and not a senior engineer. It needs guidance. How long? We will figure that out in the future.

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Márk Sági-Kazár @sagikazarmark.com · 16/01/2026

So while Claude delivers excellent results from a functional perspective, it's still not delivering good quality code. I'm not saying it's Claude's fault though: I could provide much better specifications and then it may deliver the desired results. But I may as well just do the work myself.

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Márk Sági-Kazár @sagikazarmark.com · 16/01/2026

I've spent the last two days coding exclusively with Claude Code. In the end, I haven't even looked at the code, just accepted it if it worked. I'm looking at the code now and trying to make manual changes: it's not complete crap, but it's close to it.

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Márk Sági-Kazár @sagikazarmark.com · 15/01/2026

Sessionize says I've been an active speaker last year.

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Reposted by Márk Sági-Kazár

Marcus Noble @averagemarcus.bsky.social · 11/12/2025

Well this is freaking exciting! 😁 I’ll be speaking at #KubeConCloudNativeCon for the first time next year! 🎉 Myself and @sagikazarmark.com are going to be telling you all about the oddities in Kubernetes! 😎 This is going to be a fun one! kccnceu2026.sched.com/event/2CW2p/... #KubeCon #KubeConEU

I'M SPEAKING AT
KubeCon CloudNativeCon
Europe 2026
23-26 MARCH
AMSTERDAM, THE NETHERLANDS
#KubeCon #CloudNativeCon

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Márk Sági-Kazár @sagikazarmark.com · 24/11/2025

Iximiuz Labs subscription is now on sale with a 70% discount. It's essentially the price of a coffee per month. If you're looking to enhance your skills in containers or networking, you won't find a better investment than this.

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Márk Sági-Kazár @sagikazarmark.com · 21/10/2025

@gitea.com is an excellent open-source alternative to GitHub if you need to self-host your Git repositories. For me, it's the ideal solution for demonstrations since it's just a single binary. Give it a try: labs.iximiuz.com/playgrounds... #git #opensource #iximiuz

labs.iximiuz.com

Gitea Playground | iximiuz Labs

Basically GiHub, but Open Source.

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Márk Sági-Kazár @sagikazarmark.com · 14/10/2025

Nope, but that’s a good idea for another challenge 😃

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Márk Sági-Kazár @sagikazarmark.com · 14/10/2025

You are on the right path, but it’s not an authz trick. :)

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Márk Sági-Kazár @sagikazarmark.com · 14/10/2025

I can neither confirm nor deny that there is a high chance it is. :)

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Márk Sági-Kazár @sagikazarmark.com · 14/10/2025

Did you know that pods can become "invisible"? Test your Kubernetes knowledge by finding an invisible pod in this challenge: labs.iximiuz.com/challenges/.... No hints, no solutions. Prepare for a tough one. Thanks to the fantastic @averagemarcus.bsky.social for this gem. #kubernetes #iximiuz

labs.iximiuz.com

Kube Mysteries: The Invisible Pod | Challenge

Did you know that pods can become invisible? Can you figure out how?

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Márk Sági-Kazár @sagikazarmark.com · 08/10/2025

These past couple days I've been working on a new side project: github.com/sagikazarma... It allows running slash commands from GitHub issues and pull requests. Feedback welcome! :)

github.com

GitHub - sagikazarmark/octoslash: A Go library and CLI for building custom GitHub slash commands

A Go library and CLI for building custom GitHub slash commands - sagikazarmark/octoslash

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Márk Sági-Kazár @sagikazarmark.com · 23/09/2025

I've been using devenv.sh in my Flake envs for a while (proof: github.com/search?q=ow...**%2Fflake.nix+devenv&type=code), but I initially avoided their CLI. However, I've realized that I don't use the advantages of Flakes, and their CLI offers a much better experience.

github.com

GitHub

GitHub is where people build software. More than 150 million people use GitHub to discover, fork, and contribute to over 420 million projects.

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Márk Sági-Kazár @sagikazarmark.com · 22/09/2025

By the way, if anyone has a viable solution, I'm all ears.

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Márk Sági-Kazár @sagikazarmark.com · 22/09/2025

So, if I haven't responded to an issue or reviewed a PR, it's not because I don't care, and maybe not even because I lack the time (though that's often true), but simply because I don't see it. If it's important, please keep pinging me in issues or reach out via alternative channels.

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Márk Sági-Kazár @sagikazarmark.com · 22/09/2025

I've just deleted about 5,000 GitHub email notifications that piled up over the last two months. That's over 500 emails a week, more than 50 a day. Admittedly, not all demand my attention, but just sifting through them takes considerable time.

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Márk Sági-Kazár @sagikazarmark.com · 22/09/2025

Git is central to modern software and platform engineering, making it and its ecosystem accessible to everyone is crucial. I’m glad to see GitHub alternatives like @gitea.com, as they help democratize the ecosystem. Try it out here: labs.iximiuz.com/playgrounds... #opensource #git #iximiuz

labs.iximiuz.com

Gitea Playground | iximiuz Labs

Basically GiHub, but Open Source.

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Márk Sági-Kazár @sagikazarmark.com · 20/09/2025

Played around with @golang iterators today: github.com/sagikazarma... I'm still undecided about how I feel about them. I like the concept, but I'm concerned it might hurt readability more than it helps. I'm also a bit disappointed to see how iterators are so much more powerful in other languages.

github.com

GitHub - sagikazarmark/seq: Utilities for working with Go 1.23+ iterator sequences

Utilities for working with Go 1.23+ iterator sequences - sagikazarmark/seq

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Márk Sági-Kazár @sagikazarmark.com · 02/09/2025

Testing mutating and validating admission policies can be challenging, especially when dealing with complex policies. Here's an online tool that can help: playcel.undistro.io/ #kubernetes

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Márk Sági-Kazár @sagikazarmark.com · 28/08/2025

Kubernetes 1.34 brings Mutating Admission Policy to beta! To celebrate the occasion, I wrote a comprehensive tutorial on admission control: labs.iximiuz.com/tutorials/k... Check it out if you're interested in a deep dive into Kubernetes admission control. #kubernetes #iximiuz

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Márk Sági-Kazár @sagikazarmark.com · 28/08/2025

Kubernetes 1.34 has just been released! If you're eager to explore the new features, my Kubernetes the Hard Way playground is already upgraded: labs.iximiuz.com/playgrounds... #kubernetes #iximiuz

labs.iximiuz.com

Kubernetes the Hard Way Playground | iximiuz Labs

A manually assembled Kubernetes cluster, inspired by Kelsey Hightower's "Kubernetes the Hard Way" tutorial.

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Márk Sági-Kazár @sagikazarmark.com · 21/08/2025

Container runtime, OCI runtime, runtime handler, RuntimeClass What exactly do all these terms mean, and how are they connected? Dive into this tutorial to unravel the complexity of runtimes: labs.iximiuz.com/tutorials/k... #kubernetes #iximiuz

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Márk Sági-Kazár @sagikazarmark.com · 19/08/2025

Cool! Let’s chat somewhere about the details!

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