Envoy Gateway

Envoy Gateway Extension Server

A gRPC contract an operator implements to extend Envoy Gateway. Envoy Gateway is the client: during xDS translation it calls the six EnvoyGatewayExtension RPCs — PostRouteModify, PostVirtualHostModify, PostHTTPListenerModify, PostClusterModify, PostEndpointsModify and PostTranslateModify — so the extension can modify generated Envoy routes, virtual hosts, listeners, clusters, endpoints and the full translated output before it reaches the proxies. Messages are typed against Envoy's own v3 config protos, pinned to buf.build/envoyproxy/envoy:v1.33.0.

GitHub

Documentation

📖
Documentation
https://gateway.envoyproxy.io/docs/tasks/extensibility/extension-server/

Other Resources

🔗
Protobuf
https://raw.githubusercontent.com/api-evangelist/envoy-gateway/refs/heads/main/grpc/envoy-gateway-extension-service.proto
🔗
Protobuf
https://raw.githubusercontent.com/api-evangelist/envoy-gateway/refs/heads/main/grpc/envoy-gateway-extension-context.proto

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API entry from apis.yml

apis.yml Raw ↑ 
aid: envoy-gateway:envoy-gateway-extension-server
name: Envoy Gateway Extension Server
description: 'A gRPC contract an operator implements to extend Envoy Gateway. Envoy Gateway is the client:
  during xDS translation it calls the six EnvoyGatewayExtension RPCs — PostRouteModify, PostVirtualHostModify,
  PostHTTPListenerModify, PostClusterModify, PostEndpointsModify and PostTranslateModify — so the extension
  can modify generated Envoy routes, virtual hosts, listeners, clusters, endpoints and the full translated
  output before it reaches the proxies. Messages are typed against Envoy''s own v3 config protos, pinned
  to buf.build/envoyproxy/envoy:v1.33.0.'
humanURL: https://gateway.envoyproxy.io/docs/tasks/extensibility/extension-server/
baseURL: https://{extension-server-host}:{port}
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/envoy-gateway.png
tags:
- gRPC
- Extensibility
- xDS
properties:
- type: Documentation
  url: https://gateway.envoyproxy.io/docs/tasks/extensibility/extension-server/
- type: Protobuf
  url: grpc/envoy-gateway-extension-service.proto
- type: Protobuf
  url: grpc/envoy-gateway-extension-context.proto