[ingress-nginx] Error=”ingress does not contain a valid IngressClass”, After upgrade ingress-nginx(helm 4.x.x, ingress-nginx/controller:v1.1.0)

Sau khi mình upgrade helm chart cho ingress-nginx thì ôi thôi.
Mấy link ingress-chết ngắt.

Contents

Fix valid IngressClass

Rất cảm ơn anh Tây
https://forum.linuxfoundation.org/discussion/859965/exercise-7-nginx-update-requires-change-to-yaml

theo như anh mô tạ có a breaking change
https://github.com/kubernetes/ingress-nginx/releases/tag/controller-v1.0.0

If you miss the ingressclass the controller gives you:

“Ignoring ingress because of error while validating ingress class” ingress=”default/ingress-test” error=”ingress does not contain a valid IngressClass”

So a quick fix is adding the annotation for the ingress class to your ingress.yaml Otherwise the whole ingress part of lab 7 will not work.

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: ingress-test
  namespace: default
  annotations:
    kubernetes.io/ingress.class: "nginx"
spec:
  rules:
  - host: www.example.com
    http:
      paths:
      - backend:
          service:
            name: secondapp
            port:
              number: 80
        path: /
        pathType: ImplementationSpecific
  - host: thirdpage.org
    http:
      paths:
      - backend:
          service:
            name: thirdpage
            port:
              number: 80
        path: /
        pathType: ImplementationSpecific

Tóm lại là bạn cần thêm annotation vào các kind Ingress.

annotations:
    kubernetes.io/ingress.class: "nginx"

Nếu điện trên rancher thì bạn chú ý ô value ko có dấu “”

Update Mon Feb 28th, 2021 – ingressClassName

Nếu cluster k8s của bạn đã có version < 1.19

Bạn có thể sử dụng annotation hoặc spec

with annotation:

annotations:
    # use the shared ingress-nginx
    kubernetes.io/ingress.class: "nginx"

with ingressClassName

apiVersion: networking.k8s.io/v1beta1
kind: Ingress
metadata:
  name: ingress-myservicea
spec:
  ingressClassName: nginx
  rules:
  - host: myservicea.foo.org

If the cluster uses Kubernetes version >= 1.19.x
Bạn nên sử dụng ingressClassName: nginx

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: ingress-myservicea
spec:
  rules:
  - host: myservicea.foo.org
    http:
      paths:
      - path: /
        pathType: Prefix
        backend:
          service:
            name: myservicea
            port:
              number: 80
  ingressClassName: nginx

Reference links:
https://kubernetes.github.io/ingress-nginx/user-guide/basic-usage/