Márk Sági-Kazár

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/

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

🎉 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/...

🚨 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.

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

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

When did installing prebuilt binaries using npm become the standard?

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...

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...

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!

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...

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...

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...

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...

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...

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...

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

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

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

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

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

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.

@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

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

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! :)

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.

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

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.

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

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

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

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

Mutating admission policies will graduate to beta in a few weeks: github.com/orgs/kubern... If you find mutating admission webhooks challenging, even for simple mutations, this will be a game changer for you. #kubernetes

Ever wanted to try Kelsey Hightower's "Kubernetes the Hard Way" tutorial but didn’t know where to begin? Explore this playground on iximiuz Labs, where you can experiment with a manually assembled cluster: labs.iximiuz.com/playgrounds.... #kubernetes #iximiuz

Another great Kubernetes tool I found recently: kaniuse.gerome.dev/ It allows you to track which features are in which stage and in which Kubernetes version. As a content author, I especially appreciate the historical information. #kubernetes