Digital-Forest-Monitoring | Forest monitoring apps and services based on remote sensing data | Dashboard library

I have microk8s v1.22.2 running on Ubuntu 20.04.3 LTS.

Output from /etc/hosts:

127.0.0.1 localhost
127.0.1.1 main

Excerpt from microk8s status:

addons:
  enabled:
    dashboard            # The Kubernetes dashboard
    ha-cluster           # Configure high availability on the current node
    ingress              # Ingress controller for external access
    metrics-server       # K8s Metrics Server for API access to service metrics

I checked for the running dashboard (kubectl get all --all-namespaces):

NAMESPACE     NAME                                             READY   STATUS    RESTARTS   AGE
kube-system   pod/calico-node-2jltr                            1/1     Running   0          23m
kube-system   pod/calico-kube-controllers-f744bf684-d77hv      1/1     Running   0          23m
kube-system   pod/metrics-server-85df567dd8-jd6gj              1/1     Running   0          22m
kube-system   pod/kubernetes-dashboard-59699458b-pb5jb         1/1     Running   0          21m
kube-system   pod/dashboard-metrics-scraper-58d4977855-94nsp   1/1     Running   0          21m
ingress       pod/nginx-ingress-microk8s-controller-qf5pm      1/1     Running   0          21m

NAMESPACE     NAME                                TYPE        CLUSTER-IP       EXTERNAL-IP   PORT(S)    AGE
default       service/kubernetes                  ClusterIP   10.152.183.1     <none>        443/TCP    23m
kube-system   service/metrics-server              ClusterIP   10.152.183.81    <none>        443/TCP    22m
kube-system   service/kubernetes-dashboard        ClusterIP   10.152.183.103   <none>        443/TCP    22m
kube-system   service/dashboard-metrics-scraper   ClusterIP   10.152.183.197   <none>        8000/TCP   22m

NAMESPACE     NAME                                               DESIRED   CURRENT   READY   UP-TO-DATE   AVAILABLE   NODE SELECTOR            AGE
kube-system   daemonset.apps/calico-node                         1         1         1       1            1           kubernetes.io/os=linux   23m
ingress       daemonset.apps/nginx-ingress-microk8s-controller   1         1         1       1            1           <none>                   22m

NAMESPACE     NAME                                        READY   UP-TO-DATE   AVAILABLE   AGE
kube-system   deployment.apps/calico-kube-controllers     1/1     1            1           23m
kube-system   deployment.apps/metrics-server              1/1     1            1           22m
kube-system   deployment.apps/kubernetes-dashboard        1/1     1            1           22m
kube-system   deployment.apps/dashboard-metrics-scraper   1/1     1            1           22m

NAMESPACE     NAME                                                   DESIRED   CURRENT   READY   AGE
kube-system   replicaset.apps/calico-kube-controllers-69d7f794d9     0         0         0       23m
kube-system   replicaset.apps/calico-kube-controllers-f744bf684      1         1         1       23m
kube-system   replicaset.apps/metrics-server-85df567dd8              1         1         1       22m
kube-system   replicaset.apps/kubernetes-dashboard-59699458b         1         1         1       21m
kube-system   replicaset.apps/dashboard-metrics-scraper-58d4977855   1         1         1       21m

I want to expose the microk8s dashboard within my local network to access it through http://main/dashboard/

To do so, I did the following nano ingress.yaml:

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  annotations:
    kubernetes.io/ingress.class: public
    nginx.ingress.kubernetes.io/backend-protocol: "HTTPS"
  name: dashboard
  namespace: kube-system
spec:
  rules:
  - host: main
    http:
      paths:
      - backend:
          serviceName: kubernetes-dashboard
          servicePort: 443
        path: /

Enabling the ingress-config through kubectl apply -f ingress.yaml gave the following error:

error: unable to recognize "ingress.yaml": no matches for kind "Ingress" in version "extensions/v1beta1"

Help would be much appreciated, thanks!

Update: @harsh-manvar pointed out a mismatch in the config version. I have rewritten ingress.yaml to a very stripped down version:

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: dashboard
  namespace: kube-system
spec:
  rules:
  - http:
      paths:
      - path: /dashboard
        pathType: Prefix
        backend:
          service:
            name: kubernetes-dashboard
            port:
              number: 443

Applying this works. Also, the ingress rule gets created.

NAMESPACE     NAME        CLASS    HOSTS   ADDRESS     PORTS   AGE
kube-system   dashboard   public   *       127.0.0.1   80      11m

However, when I access the dashboard through http://<ip-of-kubernetes-master>/dashboard, I get a 400 error.

Log from the ingress controller:

192.168.0.123 - - [10/Oct/2021:21:38:47 +0000] "GET /dashboard HTTP/1.1" 400 54 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/94.0.4606.71 Safari/537.36" 466 0.002 [kube-system-kubernetes-dashboard-443] [] 10.1.76.3:8443 48 0.000 400 ca0946230759edfbaaf9d94f3d5c959a

Does the dashboard also need to be exposed using the microk8s proxy? I thought the ingress controller would take care of this, or did I misunderstand this?