Kubernetes | Docker Desktop: Kubernetes Web UI (Dashboard)
See this page for more details about Kubernetes Web UI (Dashboard):
https://kubernetes.io/docs/tasks/access-application-cluster/web-ui-dashboard/

  • Deploying the Dashboard UI:

    See this page for details Helm installation: Install Helm

    Add kubernetes-dashboard repository: 
    $ helm repo add kubernetes-dashboard https://kubernetes.github.io/dashboard/
    "kubernetes-dashboard" has been added to your repositories
    Deploy a Helm Release named "kubernetes-dashboard" using the kubernetes-dashboard chart: 
    $ helm upgrade --install kubernetes-dashboard kubernetes-dashboard/kubernetes-dashboard --create-namespace --namespace kubernetes-dashboard
    Release "kubernetes-dashboard" does not exist. Installing it now.
NAME: kubernetes-dashboard
NAMESPACE: kubernetes-dashboard
STATUS: deployed
REVISION: 1
TEST SUITE: None
NOTES:
*************************************************************************************************
*** PLEASE BE PATIENT: Kubernetes Dashboard may need a few minutes to get up and become ready ***
*************************************************************************************************

Congratulations! You have just installed Kubernetes Dashboard in your cluster.

To access Dashboard run:
  kubectl -n kubernetes-dashboard port-forward svc/kubernetes-dashboard-kong-proxy 8443:443

NOTE: In case port-forward command does not work, make sure that kong service name is correct.
      Check the services in Kubernetes Dashboard namespace using:
        kubectl -n kubernetes-dashboard get svc

Dashboard will be available at:
  https://localhost:8443

  • Check the Dashboard Service:
    $ kubectl get services -n kubernetes-dashboard -o wide
    NAME                        TYPE        CLUSTER-IP     EXTERNAL-IP   PORT(S)    AGE    SELECTOR
kubernetes-dashboard        ClusterIP   10.101.99.76   <none>        443/TCP    7d9h   k8s-app=kubernetes-dashboard
...

  • Check the Dashboard Deployment:
    $ kubectl get deployments -n kubernetes-dashboard -o wide
    NAME                        READY   UP-TO-DATE   AVAILABLE   AGE    CONTAINERS                  IMAGES                                SELECTOR
kubernetes-dashboard        1/1     1            1           7d9h   kubernetes-dashboard        kubernetesui/dashboard:v2.2.0         k8s-app=kubernetes-dashboard
...

  • Check the Dashboard Pods:
    $ kubectl get pods -n kubernetes-dashboard -o wide
    NAME                                         READY   STATUS    RESTARTS   AGE    IP           NODE             NOMINATED NODE   READINESS GATES
kubernetes-dashboard-76577bd7bb-22mzj        1/1     Running   0          7d9h   10.1.0.145   docker-desktop   <none>           <none>
...

  • Accessing the Dashboard UI:
    $ kubectl port-forward svc/kubernetes-dashboard-kong-proxy 8443:443 -n kubernetes-dashboard
    Forwarding from 127.0.0.1:8443 -> 8443
Forwarding from [::1]:8443 -> 8443
Handling connection for 8443
    To access the Web UI (Dashboard), open your favorite browser and copy paste the URL: https://localhost:8443
    Kubernetes Dashboard - Authentication Screen

  • Generate a Bearer Token for a Service Account:

    Create a service account: 
    $ kubectl create serviceaccount kubernetes-dashboard-admin -n kubernetes-dashboard
    serviceaccount/kubernetes-dashboard-admin created
    Create a service account using the yaml file: 
    apiVersion: v1
kind: ServiceAccount
metadata:
  name: kubernetes-dashboard-admin
  namespace: kubernetes-dashboard
    $ kubectl apply -f kubernetes-dashboard-service-account.yaml -n kubernetes-dashboard
    Create a cluster role binding: 
    $ kubectl create clusterrolebinding kubernetes-dashboard-admin --clusterrole=cluster-admin --serviceaccount=kubernetes-dashboard:kubernetes-dashboard-admin
    lusterrolebinding.rbac.authorization.k8s.io/kubernetes-dashboard-admin created
    Create a cluster role binding using the yaml file: 
    apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: admin-user
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: cluster-admin
subjects:
- kind: ServiceAccount
  name: kubernetes-dashboard-admin
  namespace: kubernetes-dashboard
    $ kubectl apply -f kubernetes-dashboard-cluster-role-binding.yaml -n kubernetes-dashboard
    Generate a Bearer Token: 
    $ kubectl create token kubernetes-dashboard-admin -n kubernetes-dashboard
    eyJhbGciOiJSUzI1NiIsImtpZCI6ImNRSWpaaWtzSGprazQ...
    Kubernetes Dashboard

  • Accessing the Dashboard UI remotely:

    Forward the port 8443 from Windows into your Linux WSL distro.

    The portproxy server listens for messages sent to a specific port and IPv4 address and maps a port and IPv4 address to send the messages received after establishing a separate TCP connection.

    • listenaddress: Specifies the IPv4 address for which to listen ("0.0.0.0" any IPv4 address).
    • listenport: Specifies the IPv4 port on which to listen ("8443").
    • connectaddress: Specifies the IPv4 address to which to connect ("172.26.110.211", this should be the address of your Linux WSL distro).
    • connectport: Specifies the IPv4 port to which to connect ("8443").

    C:\Users\mtitek>netsh interface portproxy add v4tov4 listenaddress=0.0.0.0 listenport=8443 connectaddress=172.26.110.211 connectport=8443
    To check the Port:
    C:\Users\mtitek>netsh interface portproxy show v4tov4
Listen on ipv4:               Connect to ipv4:
Address Port                  Address        Port
------- ----                  -------        ----
0.0.0.0 8443                  172.26.110.211 8443
    Add a new firewall rule to enable the port.
    C:\Users\mtitek>netsh advfirewall firewall add rule name="Open Port 8443 - WSL 2" dir=in action=allow protocol=TCP localport=8443
    To check the rule:
    C:\Users\mtitek>netsh advfirewall firewall show rule status=enabled dir=in name=all | select-string -pattern "(LocalPort.*8443)" -context 9,4
Rule Name:           Open Port 8443 - WSL 2
-------------------------------------------
Enabled:             Yes
LocalPort:           8443
...
    Start kubectl proxy command:
    $ kubectl port-forward svc/kubernetes-dashboard-kong-proxy 8443:443 --address='0.0.0.0' -n kubernetes-dashboard
    Forwarding from 0.0.0.0:8443 -> 8443
Handling connection for 8443
To delete the firewall rule:
C:\Users\mtitek>netsh advfirewall firewall delete rule name="Open Port 8443 - WSL 2"
To delete the IPv4 port and address from the list of IPv4 ports and addresses for which the server listens:
C:\Users\mtitek>netsh interface portproxy delete v4tov4 listenaddress=0.0.0.0 listenport=8443
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