I have two separate IngressControllers, one internal and one external. I would like to define which controller to use for each Ingress.

I have defined --ingress.class=hapxroxy-ext arg for the external controller and --empty-ingress-class for the internal.

Ingress Services

apiVersion: v1
kind: Service
metadata:
  annotations:
  labels:
    run: ext-haproxy-ingress
  name: ext-haproxy-ingress
  namespace: ext-haproxy-controller
spec:
  selector:
    run: ext-haproxy-ingress
  type: LoadBalancer
---
apiVersion: v1
kind: Service
metadata:
  annotations:
    "service.beta.kubernetes.io/azure-load-balancer-internal": "true"
  labels:
    run: haproxy-ingress
  name: haproxy-ingress
  namespace: haproxy-controller
spec:
  selector:
    run: haproxy-ingress
  type: LoadBalancer

I have IngressClasses.

apiVersion: networking.k8s.io/v1
kind: IngressClass
metadata:
  name: external-lb
spec:
  controller: haproxy.org/ingress-controller/hapxroxy-ext
---
apiVersion: networking.k8s.io/v1
kind: IngressClass
metadata:
  name: internal-lb
  annotations:
    "ingressclass.kubernetes.io/is-default-class": "true"
spec:
  controller: haproxy.org/ingress-controller

I have one Ingress

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: ingress
  annotations:
    "kubernetes.io/ingress.class": internal-lb
spec:
  ingressClassName: internal-lb
...

Despite mapping the Ingress to just internal-lb, both internal-lb and external-lb handle requests.

It seems pretty straightforward in the docs, but I'm missing something.