Rate Limiting

NGINX’s limit-rps and limit-rpm annotations map to a kgateway TrafficPolicy with local rate limiting.

Before: Ingress with rate limits 

cat <<'EOF' > ratelimit-ingress.yaml
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: ratelimit-demo
  annotations:
    nginx.ingress.kubernetes.io/limit-rps: "10"
    nginx.ingress.kubernetes.io/limit-burst-multiplier: "2"
spec:
  ingressClassName: nginx
  rules:
  - host: api.example.com
    http:
      paths:
      - backend:
          service:
            name: api-service
            port:
              number: 8080
        path: /
        pathType: Prefix
EOF

Convert 

ingress2gateway print --providers=ingress-nginx --emitter=kgateway \
  --input-file ratelimit-ingress.yaml > ratelimit-kgateway.yaml

After: TrafficPolicy with token bucket 

cat ratelimit-kgateway.yaml

The generated TrafficPolicy uses a token bucket algorithm. With 10 RPS and a 2x burst multiplier, you get maxTokens: 20:

apiVersion: gateway.kgateway.dev/v1alpha1
kind: TrafficPolicy
metadata:
  name: ratelimit-demo-policy
spec:
  targetRefs:
  - group: gateway.networking.k8s.io
    kind: HTTPRoute
    name: ratelimit-demo-api-example-com
  rateLimit:
    local:
      tokenBucket:
        maxTokens: 20
        tokensPerFill: 10
        fillInterval: 1s

Apply 

kubectl apply -f ratelimit-kgateway.yaml
Session AffinityCORS