Stefan Schimanski
@sttts.social
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
Hire people who removed code (not tests).
Don't look for people who added the most.
Don't look for people who added the most.
November 7, 2025 at 3:21 AM
Hire people who removed code (not tests).
Don't look for people who added the most.
Don't look for people who added the most.
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/
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
October 13, 2025 at 6:16 PM
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/
Am 3. November im @codecentric Office.
https://www.meetup.com/frankfurt-am-main-kubernetes-meetup/events/311516952/
Reposted by Stefan Schimanski
Tell me you're old without telling me you're old.
October 10, 2025 at 9:41 AM
Tell me you're old without telling me you're old.
kc – kubernetes commander
October 9, 2025 at 5:36 PM
kc – kubernetes commander
Don't trust code that you have not vibe coded yourself.
October 8, 2025 at 6:55 PM
Don't trust code that you have not vibe coded yourself.
When working with an agent, will you put requirements and stories into Jira?
September 27, 2025 at 4:35 PM
When working with an agent, will you put requirements and stories into Jira?
Today is a good day to vibe code something. Wish me luck.
September 26, 2025 at 7:35 AM
Today is a good day to vibe code something. Wish me luck.
Is it time for comment-free code? And then an IDE adding them dynamically following your favorite style on-the-fly?
September 25, 2025 at 8:35 AM
Is it time for comment-free code? And then an IDE adding them dynamically following your favorite style on-the-fly?
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.
September 5, 2025 at 4:55 PM
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.
"Did I leave the agent coding in yolo mode?" is the new "Did I switch the stove off?"
September 3, 2025 at 7:15 PM
"Did I leave the agent coding in yolo mode?" is the new "Did I switch the stove off?"
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.
August 13, 2025 at 8:05 PM
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.
Added custom subresources to CRDs in our internal kube code based generic control plane: 194 lines of code. One day of work 😎
August 8, 2025 at 3:25 PM
Added custom subresources to CRDs in our internal kube code based generic control plane: 194 lines of code. One day of work 😎
Little @KubeCon_ fomo. Have a great conference everybody!
August 8, 2025 at 1:05 PM
Little @KubeCon_ fomo. Have a great conference everybody!
multicluster-runtime provider that watches kubeconfig secrets in a namespace and dynamically engages controllers 🚀
https://github.com/kubernetes-sigs/multicluster-runtime/pull/45
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
July 5, 2025 at 5:35 PM
multicluster-runtime provider that watches kubeconfig secrets in a namespace and dynamically engages controllers 🚀
https://github.com/kubernetes-sigs/multicluster-runtime/pull/45
https://github.com/kubernetes-sigs/multicluster-runtime/pull/45
AI creates PR (on my machine). I review. Can I approve? What does the Github/lab netiquette say?
July 3, 2025 at 3:25 PM
AI creates PR (on my machine). I review. Can I approve? What does the Github/lab netiquette say?
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"
June 6, 2025 at 12:16 PM
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"
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.
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.
May 21, 2025 at 5:06 PM
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.
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.
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.
The measure of progress is not the thing that can pass. The measure is not continuous. There is a point when everything comes together.
April 30, 2025 at 9:41 PM
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.
The measure of progress is not the thing that can pass. The measure is not continuous. There is a point when everything comes together.
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.
I call them Heavy Liftings.
Making them iterative with sensible intermediate steps makes them infeasible or way slower.
April 30, 2025 at 9:41 PM
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.
I call them Heavy Liftings.
Making them iterative with sensible intermediate steps makes them infeasible or way slower.
We need fewer lists, more visual representations in work communication. Will AI help?
April 29, 2025 at 8:28 PM
We need fewer lists, more visual representations in work communication. Will AI help?
Reposted by Stefan Schimanski
SQL, columnar, NO SQL, graph, and vector databases
April 26, 2025 at 12:11 AM
SQL, columnar, NO SQL, graph, and vector databases
The real planning tool is gdocs. Jira is an asynchronous replica. Mostly out of date. Never consistent.
April 30, 2025 at 9:41 PM
The real planning tool is gdocs. Jira is an asynchronous replica. Mostly out of date. Never consistent.
Jira must be disrupted. Please.
April 30, 2025 at 9:41 PM
Jira must be disrupted. Please.