Getting "400 Bad Request The plain HTTP request was sent to HTTPS port" when trying to access dashboard UI in browser

[maisam94]

I upgraded to the 7.5.0 release of the helm chart for the k8s-dashboard. I am getting "400 Bad Request
The plain HTTP request was sent to HTTPS port" when loading the webpage for the UI in my browser.
I expected to see a login page where I can supply a token.

I did clean installation for the new helm chart with ingress enabled and a couple parameters defined such as annotations, ingress class name, host and lets-encrypt for ssl connection, but when trying to access the dashboard UI in my browser, I got "400 Bad Request ..."

These are the values that I am supplying to the helm chart:

app:
  ingress:
    useDefaultAnnotations: false
    enabled: true
    annotations:
      ingress.kubernetes.io/force-ssl-redirect:  'true'
      konghq.com/strip-path: 'true'
    ingressClassName: kong
    hosts:
      - k8s-new.app.xxx.com
    secretName: kubernetes-dashboard-tls
    issuer:
      name: letsencrypt-prod
    host: k8s-new.app.xxx.com


kong:
  enabled: true
  ingressController:
    enabled: true
  proxy:
    type: LoadBalancer
    annotations:
      service.beta.kubernetes.io/aws-load-balancer-internal: "true"

I would like to be able to reach the dashboard UI from outside the cluster via Https protocol with custom host.
so what should be configured or how would I point to kong proxy when using the ingress provided in the helm chart?

If there is any other information I can provide, please let me know. Thank you for your help!

[maisam94]

any update?

[redshadeaux]

I am somewhat seeing the same thing. Only difference is that I get a complete blank page in the browser when loading the UI. It seems to attempt to load, however I do not see an error message or the login page. Still waiting on a response from the discussion I created unfortunately.
If I get an answer, I will be sure to post something here that might be helpful.

[tbernacchi]

In my environment I was able to make work using nginx ingress controller like this:

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  annotations:
    nginx.ingress.kubernetes.io/backend-protocol: HTTPS
    nginx.ingress.kubernetes.io/force-ssl-redirect: "true"
    nginx.ingress.kubernetes.io/ssl-redirect: "true"
  creationTimestamp: "2024-07-16T23:50:50Z"
  generation: 29
  name: dashboard
  namespace: kubernetes-dashboard
  resourceVersion: "6607021"
  uid: 07f0c326-535a-47e3-bad1-bd04a89c67a7
spec:
  ingressClassName: nginx
  rules:
  - host: mykubernetes.com
    http:
      paths:
      - backend:
          service:
            name: kubernetes-dashboard-kong-proxy
            port:
              number: 443
        path: /
        pathType: Prefix
  tls:
  - hosts:
    - mykubernetes.com
    secretName: my-kubernetes-dashboard
status:
  loadBalancer:
    ingress:
    - ip: X.X.X.X

It redirects just fine. The only problem it's my cert:

[tbernacchi]

Can you paste your ingress in yaml format here?