Extending Envoy Using WebAssembly (Wasm)

on YouTube ↗32m

" summary

Explains how Envoy loads WebAssembly modules (default V8 runtime, proxy-wasm ABI) and shows a working Go/TinyGo module compiled to main.wasm that increments a hello header counter and injects two response headers read from config. Demonstrates local envoy plus admin stats and dynamic delivery via Istio xDS to sidecars (no envoy restart), describes singleton VM for global tasks, notes Wasm supports 30+ languages, and proves the filter runs, logs, and exposes metrics as configured.

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" chapters (10)

1. 0:00Start
2. 0:32Envoy Extensibility
3. 2:08Introduction
4. 3:07Wasm Benefits
5. 4:08Wasm in Envoy
6. 5:31Proxy-Wasm
7. 8:19Envoy Wasm Configuration
8. 9:38Wasm Service Config
9. 11:04Wasm HTTP Filter Config
10. 11:42Demo

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