Hello World deployed in GKE Cluster

deploy.sh

#!/bin/sh

kubectl apply -f deployment.yaml
kubectl apply -f service.yaml
kubectl apply -f ingress.yaml

kubectl get deployment

kubectl autoscale deployment helloworld-deployment \
  --cpu-percent=60 \
  --min=1 \
  --max=3
  
kubectl get service
kubectl get ingress

curl http://<EXTERNAL-IP>

kubectl get pod
kubectl logs <POD_NAME>

deployment.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: helloworld-deployment
  labels:
    app: helloworld
spec:
  replicas: 3
  selector:
    matchLabels:
      app: helloworld
  template:
    metadata:
      labels:
        app: helloworld
    spec:
      containers:
      - name: helloworld
        image: gcr.io/google-samples/hello-app:1.0
        ports:
        - containerPort: 8080 

ingress.yaml

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: helloworld-ingress
spec:
  rules:
  - http:
      paths:
      - path: /
        pathType: Prefix
        backend:
          service:
            name: helloworld-service
            port:
              number: 80 

service.yaml

apiVersion: v1
kind: Service
metadata:
  name: helloworld-service
spec:
  selector:
    app: helloworld
  ports:
    - protocol: TCP
      port: 80
      targetPort: 8080
  type: ClusterIP