title: Using the AKS http-addon returns a 503 for my service
body: <p>I have a service that I want to expose publicly over http running on AKS. I created a Kubernetes cluster and enabled the HTTP addon following these instructions <a href="https://docs.microsoft.com/en-us/azure/aks/http-application-routing" rel="nofollow noreferrer">here</a>. I then launched a service <strong>myservicea</strong> in namespace <strong>mynamespace</strong>. And then I created an ingress controller for using the following configuration.</p>
  
  <pre><code>---
  apiVersion: extensions/v1beta1
  kind: Ingress
  metadata:
    name: myservicea-ingress
    namespace: mynamespace
    annotations:
      kubernetes.io/ingress.class: addon-http-application-routing
  spec:
    rules:
    - host: myservicea.XXXXXXX.westus.aksapp.io
      http:
        paths:
        - backend:
            serviceName: myservicea
            servicePort: 80
          path: /
  </code></pre>
  
  <p>The domain <code>myservicea.XXXXXXX.westus.aksapp.io</code> is reachable after several minutes, however, I only get an HTTP 503 error. So the ingress controller does not seem to be able to find my service. What could be the issue?</p>