Blog

Engineering notes on tempus.build: runners, isolation, supply chain, and the economics of CI.

• July 28, 2026

  Kata Containers 4.0: the runtime rewritten in Rust — what changes inside

  In 4.0 the default Kata runtime becomes runtime-rs, in Rust instead of Go. What changes inside: how runtime-rs is built, what memory safety buys a host-side runtime, the new block storage model, and a verified rootfs via dm-verity/EROFS.

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• July 27, 2026

  Kata Containers: how every CI job gets its own kernel

  Ordinary containers share the host kernel. Kata Containers runs each pod in a lightweight VM with its own guest kernel — OCI-compatible, under containerd. A look at the Kata 3.x architecture and why it's the right boundary for untrusted CI code.

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