And one day, 6 years later, user namespaces support in K8s is GA!

Mostly courtesy of @giuseppe and I. But @haircommander , Sascha Grunert, and many others helped too!

I created a series of posts, explaining the problems and the implementation details.

If you, like me, are generally curious, take a look :)

🔹 Part I - All You Need to Know: https://blog.sdfg.com.ar/posts/userns-in-kubernetes-part-i/
🔹 Part II - Mappings and File Ownership: https://blog.sdfg.com.ar/posts/userns-in-kubernetes-part-ii/
🔹Part III - The Implementation: https://blog.sdfg.com.ar/posts/userns-in-kubernetes-part-iii/

🎟️ Tickets 🎟️ are now on sale for All Systems Go! 2026 in Berlin on Sept 30th-Oct 1st!
ASG! is the premier event focused on foundational user-space Linux technologies.
Since 2025, All Systems Go! is a fully attendee-funded event; ticket prices can be adjusted ⬆️ or ⬇️.

🎟️ Get your tickets: https://ti.to/all-systems-go/all-systems-go-2026
ℹ️ More info: https://all-systems-go.io/
🗣️ CFP is open till June 14th: https://cfp.all-systems-go.io/all-systems-go-2026/cfp

I don't often share Phoronix articles, but this one I will:

https://www.phoronix.com/news/Amutable

RE: https://mastodon.social/@amutable/115967747219090945

Very excited to be founding @Amutable with @pid_eins and @brauner. We are joined by one of the strongest Linux teams I could imagine building important foundational technologies that enable whole new capabilities built on trust and integrity.

RE: https://mastodon.social/@amutable/115967747219090945

Today I'm super excited to announce Amutable, our new company together with @pid_eins and @blixtra.
I couldn't be happier to have @cyphar, @daandemeyer, @zbyszek, @pothos, @michaelvogt,
@rodrigo_rata, @davidstrauss as part of our team.
I've known them for a very long time and I'm very happy they are on board for the ride.
I can't wait to show everyone what we're building.
Made with ❤️ in Berlin.

https://amutable.com/blog/introducing-amutable

#amutable #linux #systemd #⊼mutable #integrity

RE: https://mastodon.social/@amutable/115967747219090945

Ringing in 2026, I'm thrilled to join @amutable with @brauner, @blixtra, and @pid_eins — alongside a wildly talented founding engineering team — to redefine what we expect for infrastructure integrity, declarative systems, compliance, and trust. Today's approaches are tedious and uncertain; it's time for something better.

RE: https://mastodon.social/@amutable/115967747219090945

Today, we announce Amutable, our ✨ new ✨ company. We – @blixtra, @brauner, @davidstrauss, @rodrigo_rata, @michaelvogt, @pothos, @zbyszek, @daandemeyer, @cyphar, @jrocha and yours truly – are building the 🚀 next generation of Linux systems, with integrity, determinism, and verification – every step of the way.

→ https://amutable.com/blog/introducing-amutable ←

#amutable #linux #systemd #⊼mutable #integrity