Kubernetes Ingress Nginx - path forwarding does not work

Background: Kubernete Ingress serves as entry point to your services, you can define paths, which can be then forwarded to individual services

Problem: When migrating to latest version of Kubernetes, when attempting to access some path: e.g. https://my-ingress.com/test1/js/my.js file, it always returned content of /test1/index.html instead of the .js file

Original kubernetes ingress resource config file:

apiVersion: networking.k8s.io/v1beta1
kind: Ingress
metadata:
  name: ingress-resource
  annotations:
    nginx.ingress.kubernetes.io/rewrite-target: /
spec:
  rules:
  - http:
      paths:
      - path: /test1
        backend:
          serviceName: nginx-svc
          servicePort: 8080

After few hours of struggle, reading the original docs helped me (yes, RTFM): https://github.com/kubernetes/ingress-nginx/tree/master/docs/examples/rewrite

That means, that you need to add:

  nginx.ingress.kubernetes.io/rewrite-target: /$1

And change path to contain capture group regex: (.*)

      - path: /test1/(.*)

Now, when attempting to access: https://my-ingress.com/test1/js/my.js the .js file is successfully returned by ingress.

Hope this helps.

Complete file:

apiVersion: networking.k8s.io/v1beta1
kind: Ingress
metadata:
  name: ingress-resource
  annotations:
    nginx.ingress.kubernetes.io/rewrite-target: /
    nginx.ingress.kubernetes.io/rewrite-target: /$1
spec:
  rules:
  - http:
      paths:
      - path: /test1/(.*)
        backend:
          serviceName: nginx-svc
          servicePort: 8080

• Facebook
• Twitter
• Linkedin
• Reddit
• email