@serathius

Staff software engineer @Google, @etcdio tech lead in @kubernetesio. Opinions are my own

 Poland
Joined May 2011
  • Tweets223
  • Following296
  • Followers351
11Media
Replying to @Alfieri_Craig @GoogleOSS @AntithesisHQ
I'd be thrilled to collaborate on putting etcd to the test. Let's connect and discuss how we can make this happen!
2
3
1,740
Marek Siarkowicz retweeted
etcd@etcdioJul 9
We've released #etcd v3.7.0! The new version includes RangeStream, multiple performance improvements, and runs entirely from v3store, and more: etcd.io/blog/2026/announcing… #kubernetes #cloudnative #databases
4
1
13
1,425
Marek Siarkowicz retweeted
Kubernetes
@kubernetesioJun 2
Final Update for v3.4, plus 3.5.31, 3.6.12 Released - etcd.io/blog/2026/june-patch… #Kubernetes

Final Update for v3.4, plus 3.5.31, 3.6.12 Released

SIG-etcd has released the final patch update for v3.4 together with security updates for v3.5 and v3.6. Uses on v3.4 should begin the upgrade process as soon as possible. Users on v3.5 and v3.6...

etcd.io
1
4
17
4,989
Marek Siarkowicz retweeted
Kubernetes
@kubernetesioJun 2
etcd v3.7.0-rc.0 Now Available for Testing - etcd.io/blog/2026/etcd-370-r… #Kubernetes

etcd v3.7.0-rc.0 Now Available for Testing

SIG-Etcd announces the availability of etcd v3.7.0-rc.0, the first release candidate for the upcoming etcd v3.7.0 release. This release candidate includes the long-requested RangeStream feature,...

etcd.io
3
15
6,843
Marek Siarkowicz retweeted
Kubernetes
@kubernetesioMay 21
Announcing etcd 3.7.0-beta.0 - kubernetes.io/blog/2026/05/2… #Kubernetes

Announcing etcd 3.7.0-beta.0

SIG-Etcd announces the availability of the first beta release of etcd v3.7.0. This new version of the popular distributed database and key Kubernetes component includes the long-requested RangeStream...

kubernetes.io
8
38
6,417
Marek Siarkowicz retweeted
Kubernetes
@kubernetesioMay 7
Kubernetes v1.36: Server-Side Sharded List and Watch - kubernetes.io/blog/2026/05/0… #Kubernetes

Kubernetes v1.36: Server-Side Sharded List and Watch

As Kubernetes clusters grow to tens of thousands of nodes, controllers that watch high-cardinality resources like Pods face a scaling wall. Every replica of a horizontally scaled controller receives...

kubernetes.io
3
6
43
6,513
Marek Siarkowicz retweeted
Kubernetes
@kubernetesioApr 29
Kubernetes v1.36: Staleness Mitigation and Observability for Controllers - kubernetes.io/blog/2026/04/2… #Kubernetes

Kubernetes v1.36: Staleness Mitigation and Observability for Controllers

Staleness in Kubernetes controllers is a problem that affects many controllers, and is something may affect controller behavior in subtle ways. It is usually not until it is too late, when a contro...

kubernetes.io
2
4
26
5,961
Marek Siarkowicz retweeted
Google Open Source@GoogleOSSApr 6
Kubernetes is going AI-first! 🚀 We’re proud to support the new Certified Kubernetes AI Conformance program, ensuring AI workloads remain portable and reliable through common, industry-wide standards. Read more: goo.gle/kubernetes-ai-first #Kubernetes #AI How is your team scaling AI today?

Kubernetes goes AI-First: Unpacking the new AI conformance program

Learn how the Kubernetes AI Conformance program sets open, industry-wide standards for AI workloads via collaboration. Go far, go together!

opensource.googleblog.com
3
4
1
45
2,278
Marek Siarkowicz retweeted
The New Stack
@thenewstack5 Dec 2025
Learn how the etcd open source project overcame a significant knowledge drain and reliability issues by implementing deterministic simulation testing. By @ha_joslyn, thanks to @AntithesisHQ, feat. @serathius thenewstack.io/how-etcd-solv…

How etcd Solved Its Knowledge Drain With Deterministic Testing

Learn how the etcd open source project overcame a significant knowledge drain and reliability issues by implementing deterministic simulation testing.

thenewstack.io
5
8
1,250
I haven't been to an office in 2 years. I work in my pajamas making multiple six figures. Thank you, Kubernetes.
17
15
1
318
12,365
Marek Siarkowicz retweeted
paco xu@xu_paco13 Nov 2025
KubeCon Keynote Day 2: etcd + Antithesis github.com/antithesishq/etcd…
1
2
9
569
Marek Siarkowicz retweeted
Antonio Ojea@Itsuugo14 Nov 2025
The future is really collaborative and community driven
2
1
1
16
778
Marek Siarkowicz retweeted
Antithesis
@AntithesisHQ11 Nov 2025
Today our CEO, Will Wilson, announced a partnership with @CloudNativeFdn to provide free reliability testing for Graduated and Incubating projects. Stop by booth 457 to learn more. @etcdio maintainer @serathius is presenting at 12 today in the Project Pavilion about the work we did together to help advance etcd testing!
3
6
841
Marek Siarkowicz retweeted
The New Stack
@thenewstack12 Nov 2025
How do you make a foundational project like etcd truly robust? 🤔 @ha_joslyn sits down with @serathius (@Google) at #KubeCon to discuss how the etcd maintainer community used the challenge of DST to drive better, more rigorous testing.
1
4
467
Marek Siarkowicz retweeted
Kaslin Fields@kaslinfields11 Nov 2025
Replying to @kaslinfields @cra @CloudNativeFdn @jbryce @Google @janet_kuo @TerryTangYuan @ritazzhang @mfahlandt @reylejano
.@serathius and Will Wilson of Antithesis talk about their partnership on running verification and supporting etcd!
1
3
5
647
Świętujemy 10-lecie @CloudNativeFdn 🎉 Spotkajmy się na jubileuszowej edycji Cloud Native Warsaw meetup #cTENcf, gdzie poza🎂czekają na Was porywające sesje, w tym powrót do korzeni Kubernetes, panele dyskusyjne, networking i więcej. Szczegóły: goo.gle/3LsBaJo
1
3
266
Marek Siarkowicz retweeted
The New Stack
@thenewstack8 Oct 2025
Autonomous Testing of etcd’s Robustness via @CloudNativeFdn, by @serathius cncf.io/blog/2025/09/25/auto…

Autonomous testing of etcd’s robustness

As a critical component of many production systems, including Kubernetes, the etcd project’s first priority is reliability. Ensuring consistency and data safety requires our project contributors to…

cncf.io
2
5
789
Marek Siarkowicz retweeted
Kubernetes
@kubernetesio3 Oct 2025
Autonomous Testing of etcd's Robustness - etcd.io/blog/2025/autonomus_… #Kubernetes

Autonomous Testing of etcd's Robustness

This is a post from the CNCF blog which we are sharing with our community as well. As a critical component of many production systems, including Kubernetes, the etcd project’s first priority is...

etcd.io
5
14
4,988
Marek Siarkowicz retweeted
Antithesis
@AntithesisHQ25 Sep 2025
We're incredibly proud that the @CloudNativeFdn relies on Antithesis to ensure that the cloud is built on solid foundations. @serathius and the maintainers of @etcdio wrote about their use of Antithesis on the CNCF blog today, and we look forward to working with CNCF to secure their other open source projects. Code is infrastructure. Link below.
1
3
7
712
Marek Siarkowicz retweeted
Kubernetes
@kubernetesio10 Sep 2025
Kubernetes v1.34: Snapshottable API server cache - kubernetes.io/blog/2025/09/0… #Kubernetes

Kubernetes v1.34: Snapshottable API server cache

For years, the Kubernetes community has been on a mission to improve the stability and performance predictability of the API server. A major focus of this effort has been taming list requests, which...

kubernetes.io
2
20
6,633
Marek Siarkowicz retweeted
Kubernetes
@kubernetesio8 Sep 2025
The Kubernetes community mourns the sudden loss of Han Samuel Kang, 42, a talented engineer who brought exuberance to every contribution. He leaves behind a wife and two daughters. In lieu of flowers, please consider memorial donations: gofund.me/5ef5290f9

Donate to Support Tomo and Daughters After Han's Loss, organized by Sunny Kang

Han Kang, 42, passed away unexpectedly on September 3rd, 2025. Han's close fami… Sunny Kang needs your support for Support Tomo and Daughters After Han's Loss

gofundme.com
6
24
7
99
22,254
Load more