Kubernetes : Enable Dashboard2025/04/25

Enable Dashboard to manage Kubernetes Cluster on Web UI.

This example is based on the environment like follows.

-----------+---------------------------+--------------------------+------------
           |                           |                          |
       eth0|10.0.0.30              eth0|10.0.0.51             eth0|10.0.0.52
+----------+-----------+   +-----------+----------+   +-----------+----------+
|   [ dlp.srv.world ]  |   | [ node01.srv.world ] |   | [ node02.srv.world ] |
|     Control Plane    |   |      Worker Node     |   |      Worker Node     |
+----------------------+   +----------------------+   +----------------------+

[1]	Enable Dashboard on Control Plane Node.

[root@dlp ~]#

dnf -y install helm

[root@dlp ~]#

helm repo add kubernetes-dashboard https://kubernetes.github.io/dashboard/

"kubernetes-dashboard" has been added to your repositories
[root@dlp ~]#

helm install kubernetes-dashboard kubernetes-dashboard/kubernetes-dashboard --create-namespace --namespace kubernetes-dashboard

NAME: kubernetes-dashboard
LAST DEPLOYED: Fri Apr 25 19:00:36 2025
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

[root@dlp ~]#

kubectl get pods -n kubernetes-dashboard

NAME                                                    READY   STATUS    RESTARTS   AGE
kubernetes-dashboard-api-679587874d-lsb9n               1/1     Running   0          29s
kubernetes-dashboard-auth-5568b645cf-cvlqq              1/1     Running   0          29s
kubernetes-dashboard-kong-694bd68766-m5ckl              1/1     Running   0          29s
kubernetes-dashboard-metrics-scraper-55658857fc-985k4   1/1     Running   0          29s
kubernetes-dashboard-web-6c54c95d7b-qdbqb               1/1     Running   0          29s

[2]	Add an account for Dashboard management.

[root@dlp ~]#

kubectl create serviceaccount -n kubernetes-dashboard admin-user

serviceaccount/admin-user created

[root@dlp ~]#

vi rbac.yml

# create new

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: admin-user
  namespace: kubernetes-dashboard

[root@dlp ~]#

kubectl apply -f rbac.yml

clusterrolebinding.rbac.authorization.k8s.io/admin-user created

# get security token of the account above

[root@dlp ~]#

kubectl -n kubernetes-dashboard create token admin-user

eyJhbGciOiJSUzI1Ni.....

# set port-forwarding to access to dashboard

[root@dlp ~]#

kubectl port-forward -n kubernetes-dashboard svc/kubernetes-dashboard-kong-proxy --address 0.0.0.0 8443:443

Forwarding from 0.0.0.0:8443 -> 8443

[3]	Access to the URL below on a client computer in your local network. ⇒ https://(Control Plane Node Hostname or IP address):(setting port)/ After displaying following form, Copy and paste the security token you got on [2] to [Enter token] section and Click [Sing In] button.

[4]	After authentication successfully passed, Kubernetes Cluster Dashboard is displayed.

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