Yuval

I've been writing code since 1996, and infrastructure code since around 2011. The work here is Kubernetes and containers, and agent networking, security, and sandboxing.

Tools & Labs

eBPF lab · tcpdump filter builder · All tools & labs ⟶

Posts

  • 28th July 2020
  • 24th March 2020

Debugging kubernetes service account RBAC

You can use the kubectl auth can-i to debug access issues related to yourself. but what if you need to debug access issues for your application running in kubernetes?

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  • 9th November 2026

A desktop environment for AI agents, in one Dockerfile (locally and on Agent Substrate)

Claude Code, Chromium and Chrome DevTools MCP on a headless Wayland desktop you can watch over noVNC, running in a Substrate actor that suspends and resumes mid-task.

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  • 5th November 2026

Sandbox matrix: what isolation do you actually get?

What a process, a rootless container, runc, gVisor, Firecracker, and Kata actually separate for an agent: filesystem, network, kernel, and privilege.

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  • 15th May 2018

Inside packer-builder-arm-image

As someone who has worked embedded project on occasion, I needed to a consistent way to automatically prepare embedded images, pre-loaded with code (especially in the world of cheap SD-cards). The challenge is ofcourse, that embedded images use a different CPU architecture. That's why packer-builder-arm-image was created.

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