Execute kubernetes deployment file:

kubectl create -f jupyter-notebook-deployment.yaml

File: https://github.com/xjantoth/helmfile-course/blob/master/jupyter-notebook-deployment.yaml

---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: jupyter-k8s-udemy
  labels:
    app: jupyter-k8s-udemy
spec:
  replicas: 1
  selector:
    matchLabels:
      app: jupyter-k8s-udemy
  template:
    metadata:
      labels:
        app: jupyter-k8s-udemy
    spec:
      containers:
      - name: minimal-notebook
        image: jupyter/scipy-notebook:2c80cf3537ca
        ports:
        - containerPort: 8888
        command: ["start-notebook.sh"]
        args: ["--NotebookApp.token=''"]


Execute _kubernetes service_ **file**: 
```bash
kubectl create -f jupyter-notebook-service.yaml

File: https://github.com/xjantoth/helmfile-course/blob/master/jupyter-notebook-service.yaml

---
kind: Service
apiVersion: v1
metadata:
  name: jupyter-k8s-udemy
spec:
  type: NodePort
  selector:
    app: jupyter-k8s-udemy
  ports:
  - protocol: TCP
    nodePort: 30040
    port: 8888
    targetPort: 8888

kubectl get nodes -o wide | awk -F" " '{print $1"\t"$7}'

NAME	EXTERNAL-IP
ip-172-20-34-241.eu-central-1.compute.internal	18.184.212.193
ip-172-20-50-50.eu-central-1.compute.internal	3.120.179.150
ip-172-20-52-232.eu-central-1.compute.internal	18.196.157.47

SSH to your AWS EC2 instances if neceassary

ssh -i ~/.ssh/udemy_devopsinuse admin@18.184.212.193
ssh -i ~/.ssh/udemy_devopsinuse admin@3.120.179.150
ssh -i ~/.ssh/udemy_devopsinuse admin@18.196.157.47

Run command netstat -tunlp | grep 30040 at each of the EC2 instances to see that NodePort type of kubernetes service results in exposing this port at each physical EC2 within your Kubernetes cluster in AWS

ssh -i ~/.ssh/udemy_devopsinuse admin@18.184.212.193  netstat -tunlp | grep 30040
ssh -i ~/.ssh/udemy_devopsinuse admin@3.120.179.150   netstat -tunlp | grep 30040
ssh -i ~/.ssh/udemy_devopsinuse admin@18.196.157.47   netstat -tunlp | grep 30040