Kubernetes Dashboard with NodePort

Kanat Akylson

May 3, 2024

What is Kubernetes Dashboard

The Kubernetes Dashboard is a web-based UI that allows administrators to perform basic operating tasks and review cluster events. You can use the dashboard as a quick tool for viewing and monitoring the cluster, submitting manifests, inspecting logs, and getting system information.

Let’s start

curl -O https://raw.githubusercontent.com/kubernetes/dashboard/master/aio/deploy/recommended.yaml

Now open recommended.yaml file

and make changes as it image below:

Installing

$kubectl create -f recommended.yaml
$kubectl get pods -A -o wide 
$kubectl get service -n kubernetes-dashboard -o wide

Make sure all pods are running

Configuring Kubernetes-Dashboard

Let’s create Service Account for Kubernetes Dashboard

kubectl apply -f - <<EOF
apiVersion: v1
kind: Secret
metadata:
  name: admin-user
  namespace: kubernetes-dashboard
  annotations:
    kubernetes.io/service-account.name: admin-user
type: kubernetes.io/service-account-token
EOF

Now we need ClusterRoleBinding

$ cat >>dashboard-admin-bind-cluster-role.yaml<<EOF
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
EOF

Create this :

 $ kubectl create -f dashboard-admin-bind-cluster-role.yaml

Installing Metrics on Kubernetes cluster

Download metrics manifest

$wget https://github.com/kubernetes-sigs/metrics-server/releases/latest/download/components.yaml

Next we need to edit this file. Find args in Deployment section

spec:
  containers:
  - args:
    - --cert-dir=/tmp
    - --secure-port=443
    - --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname
    - --kubelet-use-node-status-port
    - --metric-resolution=15s

And add these two lines

- --kubelet-insecure-tls=true
- --kubelet-preferred-address-types=InternalIP

Now we can install our metrics — components.yaml

kubectl apply -f components.yaml

After all pods are running we can open our Kubernetes Dashboard in Browser : https://NodeIP:30001

We need a Token for accessing the Kubernetes Dashboard

$kubectl -n kubernetes-dashboard create token admin-user

You should see something like this:

eyiRhbGci1iJSgZ111NiIsImtpZCI6InVWZV9UaTY2c05rM1E0czU5ZnpJTkJEZW00c0xCR0NHRjg4R0RvWFhMU2cifQ.eyJpc3MiOiJrdWJlcm5ldGVzL3NlcnZpY2VhY2NvdW50Iiwia3ViZXJuZXRlcy5pby9zZXJ2aWNlYWNjb3VudC9uYW1lc3BhY2UiOiJrdWJlcm5ldGVzLWRhc2hib2FyZCIsImt1YmVybmV0ZXMuaW8vc2VydmljZWFjY291bnQvc2VjcmV0Lm5hbWUiOiJhZG1pbi11c2VyIiwia3ViZXJuZXRlcy5pby9zZXJ2aWNlYWNjb3VudC9zZXJ2aWNlLWFjY291bnQubmFtZSI6ImFkbWluLXVzZXIiLCJrdWJlcm5ldGVzLmlvL3NlcnZpY2VhY2NvdW50L3NlcnZpY2UtYWNjb3VudC51aWQiOiI5OTZjZjkzNy0yNWZjLTQxM2YtYjdhNS0yZGJjNTIzOWE2NjciLCJzdWIiOiJzeXN0ZW06c2VydmljZWFjY291bnQ6a3ViZXJuZXRlcy1kYXNoYm9hcmQ6YWRtaW4tdXNlciJ9.TX5NYR1NKUVgis0OrC7Wq1pFup9IVHHAnN3Gstmajo5gD1A6oPnpts9UXPpnHMwTIa86EdOBZbn1wgu-2jYdqV-IRMkcIfJ_ZZ3v_xFW_DIfNe1kuCRIaegUdiguYFFaKd9xqdaCiuXtYjq3rkdPOZJmou9yrtooduP5NejMquuhWFcvDkHWJTXh1hR-Fw664Vwz0hvoh-gvkxDnd3vJo1ZFRlaXg5aayWIsDoz51nYWoa_uKIz5LU9RCIdu8bhvPxEearnLDlGXxQ7VU1xMS7HU88T5B7Ceda0nSD8OMLpYlwT1UNZAum0ooa8k5X55H-KVjOl2maHwzn5P044hhQ

Copy it and paste to “Enter Token” field