traefik/pkg/provider/kubernetes/gateway/fixtures/tcproute/simple_cross_provider.yml

---
kind: GatewayClass
apiVersion: networking.x-k8s.io/v1alpha1
metadata:
  name: my-gateway-class
spec:
  controller: traefik.io/gateway-controller

---
kind: Gateway
apiVersion: networking.x-k8s.io/v1alpha1
metadata:
  name: my-gateway
  namespace: default
spec:
  gatewayClassName: my-gateway-class
  listeners:  # Use GatewayClass defaults for listener definition.
    - protocol: TCP
      port: 9000
      routes:
        kind: TCPRoute
        namespaces:
          from: Same
        selector:
          matchLabels:
            app: tcp-app

---
kind: TCPRoute
apiVersion: networking.x-k8s.io/v1alpha1
metadata:
  name: tcp-app-1
  namespace: default
  labels:
    app: tcp-app
spec:
  rules:
    - forwardTo:
        - weight: 1
          backendRef:
            group: traefik.containo.us
            kind: TraefikService
            name: service@file
          port: 9000
        - serviceName: whoamitcp
          port: 9000
          weight: 1