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Rewrite rule for nginx-ingress in Kubernetes

I am struggling with making a rewrite/redirect rule on nginx-ingress on Kubernetes.

According to the doc https://kubernetes.github.io/ingress-nginx/examples/rewrite/ it says it is possible with the annotation "nginx.ingress.kubernetes.io/rewrite-target", but unable to implement on my ingress. Maybe I am doing it wrong.

An example, portion of nginx-ingress yaml file.

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  annotations:
    kubernetes.io/ingress.class: nginx
    example.com/deployment-name: frontend-page
    example.com/ingress-hostnames: www.example.com
    nginx.ingress.kubernetes.io/rewrite-target: /$2
spec:
  rules:
  - host: www.example.com
    http:
      paths:
      - backend:
          serviceName: frontend-page
          servicePort: 8080
        path: /front(/|$)(.*)

Tried another way around as well but no luck:

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  annotations:
    kubernetes.io/ingress.class: nginx
    example.com/deployment-name: frontend-page
    example.com/ingress-hostnames: www.example.com
    nginx.ingress.kubernetes.io/rewrite-target: /shop
spec:
  rules:
  - host: www.example.com
    http:
      paths:
      - backend:
          serviceName: frontend-page
          servicePort: 8080
        path: /

I want to redirect any traffic to the page www.example.com/front/checkdomain to www.example.com/checkdomain. I want to remove that "front" path comes in between.

Tags:

2

Answers


  1. Chosen as BEST ANSWER
    0

    The solution was

    Changing from:

    nginx.ingress.kubernetes.io/rewrite-target: /$2

    To:

    nginx.ingress.kubernetes.io/rewrite-target: /$2/

    So the yaml looks like:

    apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  annotations:
    kubernetes.io/ingress.class: nginx
    example.com/deployment-name: frontend-page
    example.com/ingress-hostnames: www.example.com
    nginx.ingress.kubernetes.io/rewrite-target: /$2/
spec:
  rules:
  - host: www.example.com
    http:
      paths:
      - backend:
          serviceName: frontend-page
          servicePort: 8080
        path: /front(/|$)(.*)

  2. 0

    try this with an updated API version, hope your ingress supports networking.k8s.io/v1beta1

    apiVersion: networking.k8s.io/v1beta1
kind: Ingress
metadata:
  annotations:
    kubernetes.io/ingress.class: nginx
    nginx.ingress.kubernetes.io/rewrite-target: /$2
  name: rewrite
  namespace: default
spec:
  rules:
  - host: rewrite.bar.com
    http:
      paths:
      - backend:
          serviceName: http-svc
          servicePort: 80
        path: /something(/|$)(.*)

    Example : https://kubernetes.github.io/ingress-nginx/examples/rewrite/#examples

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