~/talk

WebAssembly on Kubernetes

Talkat GOTO Copenhagen 2025 · 2025-09-29..10-03· [webassembly, kubernetes]
slides:none on file

Builds an HTTP mirror in Rust (axum + tokio) compiled three ways: native (baseline ~8 MB), embedded with a WASM runtime (~12 MB), and a from-scratch WASM image <300KB that actually opens a port via a custom runtime shim. Runs on minikube using containerd and a runtimeClass pointing at the WASMEdge runtime shim; only two lines of containerd config change. Demo works but toolchain stability is fragile — axum patches and runtimes needed downgrades.

AI-written summary · about

  1. 0:00Intro
  2. 3:13WebAssembly in 2018
  3. 5:21WebAssembly in 2020
  4. 8:41WebAssembly now
  5. 10:50The many moving facets of WASM on k8s
  6. 12:25The demo points today
  7. 15:40Demo
  8. 24:13Just enough k8s intrinsics
  9. 26:42WASMedge
  10. 27:02Demo
  11. 34:52The good, the bad & the ugly
  12. 37:40Summary
  13. 38:45Outro
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