Problem

I would like to host multiple services on a single domain name under different paths. The problem is that I'm unable to get request path rewriting working using nginx-ingress.

What I've tried

I've installed nginx-ingress using these instructions:

helm install stable/nginx-ingress --name nginx-ingress --set controller.publishService.enabled=true

CHART                   APP VERSION
nginx-ingress-0.3.7     1.5.7

The example works great with hostname based backends:

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: hello-kubernetes-ingress
  annotations:
    kubernetes.io/ingress.class: nginx
spec:
  rules:
  - host: first.testdomain.com
    http:
      paths:
      - backend:
          serviceName: hello-kubernetes-first
          servicePort: 80

However, I can't get path rewriting to work. This version redirects requests to the hello-kubernetes-first service, but doesn't do the path rewrite so I get a 404 error from that service because it's looking for the /foo directory within that service (which doesn't exist).

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: hello-kubernetes-ingress
  annotations:
    kubernetes.io/ingress.class: nginx
    nginx.ingress.kubernetes.io/rewrite-target: /
spec:
  rules:
  - host: first.testdomain.com
    http:
      paths:
      - backend:
          serviceName: hello-kubernetes-first
          servicePort: 80
        path: /foo

I've also tried this example for paths / rewriting:

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: hello-kubernetes-ingress
  annotations:
    kubernetes.io/ingress.class: nginx
    nginx.ingress.kubernetes.io/rewrite-target: /$2
spec:
  rules:
  - host: first.testdomain.com
    http:
      paths:
      - backend:
          serviceName: hello-kubernetes-first
          servicePort: 80
        path: /foo(/|$)(.*)

But the requests aren't even directed to the hello-kubernetes-first service.

It appears that my rewrite configuration isn't making it to the /etc/nginx/nginx.conf file. When I run the following, I get no results:

kubectl exec nginx-ingress-nginx-ingress-XXXXXXXXX-XXXXX  cat /etc/nginx/nginx.conf | grep rewrite

How do I get the path rewriting to work?

Additional information:

• kubectl / kubernetes version: v1.14.8
• Hosting on Azure Kubernetes Service (AKS)