# kubernetes/gateway/gateway.yaml
apiVersion: gateway.networking.k8s.io/v1
kind: GatewayClass
metadata:
  name: nginx
spec:
  controllerName: gateway.nginx.org/nginx-gateway-controller
---
apiVersion: gateway.networking.k8s.io/v1
kind: Gateway
metadata:
  name: todo-gateway
  namespace: todo-app
spec:
  gatewayClassName: nginx
  listeners:
    - name: http
      port: 80
      protocol: HTTP
      allowedRoutes:
        namespaces:
          from: Same    # only routes from todo-app namespace