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Stefan Schimanski

@sttts.social

1.5K followers 350 following 270 posts

API Machinery @ ex-Upbound, ex-Redhat, Kubernetes, OpenSource, logician, restless, hungry & foolish, þetta reddast, http://github.com/sttts – Opinions&tweets are my own, http://mastodon.social/@sttts

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Stefan Schimanski @sttts.social · 1d

Lang ist es her, und es ist wieder Zeit: unser Kubernetes Meetup in Frankfurt in Neuauflage: Modern K8s.

Am 3. November im @codecentric Office.

https://www.meetup.com/frankfurt-am-main-kubernetes-meetup/events/311516952/

Modern K8s, Mon, Nov 3, 2025, 6:00 PM | Meetup

Es ist wieder soweit. Das nächste Meetup wird geschultert von den zwei K8s-Größen: Stefan Schimanski und Christopher Haar. Wie immer wird gebeten mitzudiskutieren <3 **Hor

www.meetup.com

Reposted by Stefan Schimanski

Philipp Strube @pst.blue · 4d

Tell me you're old without telling me you're old.

Stefan Schimanski @sttts.social · 5d

kc – kubernetes commander

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Stefan Schimanski @sttts.social · 5d

kc – kubernetes commander

Stefan Schimanski @sttts.social · 6d

Don't trust code that you have not vibe coded yourself.

Stefan Schimanski @sttts.social · 17d

When working with an agent, will you put requirements and stories into Jira?

Stefan Schimanski @sttts.social · 17d

Graphical user interfaces were a detour. vt100 is all you need #llms

Stefan Schimanski @sttts.social · 17d

Status report: Cursor is writing a terminal emulation in Go.

Stefan Schimanski @sttts.social · 18d

Today is a good day to vibe code something. Wish me luck.

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Stefan Schimanski @sttts.social · 19d

Is it time for comment-free code? And then an IDE adding them dynamically following your favorite style on-the-fly?

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Stefan Schimanski @sttts.social · Sep 5

Every time again, car rental must be disrupted. Looking at you @TeamEuropcar_en. If you want to experience (IT) processes of the 80ies, this is the place.

Stefan Schimanski @sttts.social · Sep 3

"Did I leave the agent coding in yolo mode?" is the new "Did I switch the stove off?"

Stefan Schimanski @sttts.social · Aug 13

Wow, @twintapp in 🇨🇭 is so incredibly 2002. Prepaid payment where prepaid means to put money on your mobile by buying credit at @coop_ch shops, at least for us non-Swiss visitors without Swiss bank account. Telefonkarten Vibes.

Stefan Schimanski @sttts.social · Aug 8

Added custom subresources to CRDs in our internal kube code based generic control plane: 194 lines of code. One day of work 😎

Stefan Schimanski @sttts.social · Aug 8

Little @KubeCon_ fomo. Have a great conference everybody!

Stefan Schimanski @sttts.social · Jul 5

multicluster-runtime provider that watches kubeconfig secrets in a namespace and dynamically engages controllers 🚀

https://github.com/kubernetes-sigs/multicluster-runtime/pull/45

🌱 Kubeconfig-Based Provider by FourFifthsCode · Pull Request #45 · kubernetes-sigs/multicluster-runtime

Follow up to @christensenjairus PR Kubeconfig-based multi-cluster provider. It reads secrets from the operator's namespace with a given label and engages the clusters that the secret applies to...

github.com

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Stefan Schimanski @sttts.social · Jul 3

AI creates PR (on my machine). I review. Can I approve? What does the Github/lab netiquette say?

Stefan Schimanski @sttts.social · Jun 6

After a little operational hickup where the app got deleted and GitOps eventually recreated everything, OH: "I only wish that the db would have been also deleted to test backups"

Stefan Schimanski @sttts.social · May 23

just performance and memory

Stefan Schimanski @sttts.social · May 21

This costed me a day and a half:

When watching via Golang types in controller-runtime, but use unstructured when reading from the cache, you are in trouble.

Of course, 2 informers are run and they are not consistent aka events arrive and you don't see the changes in the cache.

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Stefan Schimanski @sttts.social · May 1

Linter.

Stefan Schimanski @sttts.social · Apr 30

Try to build a bridge from A to B over a deep valley. No car will be able to pass before a certain point. Not even a bicycle or human can.

The measure of progress is not the thing that can pass. The measure is not continuous. There is a point when everything comes together.

Stefan Schimanski @sttts.social · Apr 30

There are tasks that are not iterative. Tasks that take days or weeks or more of super focused time until you see success.

I call them Heavy Liftings.

Making them iterative with sensible intermediate steps makes them infeasible or way slower.

Stefan Schimanski @sttts.social · Apr 29

A pity.

Stefan Schimanski @sttts.social · Apr 29

We need fewer lists, more visual representations in work communication. Will AI help?

Reposted by Stefan Schimanski

Justin Garrison @justingarrison.com · Apr 26

SQL, columnar, NO SQL, graph, and vector databases

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