adaptive_concurrency_wasm

Gradient2 Adaptive Concurrency Filter WASM plugin for Envoy

Build

1. Run make (build project)
2. Deploy wasm binaries: run kubectl apply -f example/adaptive_concurrency_configmap.yaml
3. Add pod annotations to your deployment:

   sidecar.istio.io/userVolume: '[{"name":"wasmfilters-dir","configMap": {"name": "adaptive-concurrency-wasm"}}]'
   sidecar.istio.io/userVolumeMount: '[{"mountPath":"/var/local/lib/wasm-filters","name":"wasmfilters-dir"}]'
   sidecar.istio.io/statsInclusionRegexps: http_adaptive_concurrency_filter.*

4. Deploy filter: run kubectl apply -f example/adaptive_concurrency_filter.yaml

To debug WASM run: kubectl exec -it $POD -c istio-proxy -- curl -X POST localhost:15000/logging\?wasm=debug

Links

• https://medium.com/@NetflixTechBlog/performance-under-load-3e6fa9a60581
• https://github.com/Netflix/concurrency-limits/blob/85f7ec4b3d38633a3d3b399073cb9f7796e2ec11/concurrency-limits-core/src/main/java/com/netflix/concurrency/limits/limit/Gradient2Limit.java
• https://banzaicloud.com/blog/envoy-wasm-filter/
• https://github.com/proxy-wasm/proxy-wasm-cpp-sdk#docker