Envoy Gateway Implementation in Kubernetes

This is a minimal implementation demonstrating Envoy Gateway as an API gateway in Kubernetes, featuring multiple backend services.

Contents

• Gateway Configuration

  • demo-gateway-class.yaml: Defines the GatewayClass for Envoy Gateway
  • demo-gateway.yaml: Configures listeners and ports for HTTP routing
  • demo-http-route.yaml: Routing rules for Nginx backend
  • demo-http-route-echoservice.yaml: Routing rules for echoserver backend

• Backend Services

  • Nginx deployment/service (demo-deployment-nginx.yaml, demo-service.yaml)
  • Echoserver deployments/services (v1/v2 with canary testing examples)

Quick Start

1. Install Envoy Gateway

1. helm install eg oci://docker.io/envoyproxy/gateway-helm -n envoy-gateway-system --create-namespace
2. kubectl wait --timeout=5m -n envoy-gateway-system deployment/envoy-gateway --for=condition=Available

2. Apply configurations

1. kubectl apply -f demo-gateway-class.yaml
2. kubectl apply -f demo-gateway.yaml
3. kubectl apply -f demo-http-route.yaml # For Nginx backend

3. Verify deployment

1. export GATEWAY_HOST=$(kubectl get gateway/demo-gateway -o jsonpath='{.status.addresses.value}')
2. curl -H "Host: www.example.com" http://$GATEWAY_HOST

Key Features in this implementation

• Multi-backend routing configuration
• Canary deployment examples for echoserver
• Gateway API v1 resources implementation
• Clean separation of control plane and data plane

Testing Different Backends

For echoserver implementation:

1. kubectl apply -f demo-deployment-echoserver.yaml
2. kubectl apply -f demo-http-route-echoservice.yaml

Documentation

• Envoy Gateway Official Docs
• Kubernetes Gateway API Specification
• Kubernetes Gateway API Concepts
• Gateway API GitHub Repository