curl https://raw.githubusercontent.com/kubernetes/helm/master/scripts/get > get_helm.sh

chmod +x get_helm.sh

./get_helm.sh

kubectl apply -f tiller-rbac.yaml

helm init --service-account tiller

helm install stable/metrics-server --name metrics-server --version 2.0.4 --namespace metrics`

kubectl get apiservice v1beta1.metrics.k8s.io -o yaml

kubectl run php-apache --image=k8s.gcr.io/hpa-example --requests=cpu=200m --expose --port=80

kubectl autoscale deployment php-apache --cpu-percent=50 --min=1 --max=10

kubectl get hpa

In a new terminal session:

kubectl run -i --tty load-generator --image=busybox /bin/sh
while true; do wget -q -O - http://php-apache; done

In another terminal:

kubectl get hpa -w

Find autoscaling group using the AWS Management Console, noting its name.

Edit the ASG's min/max size to 2 and 8 nodes, respectively.

Edit cluster_autoscaler.yaml, replacing <AUTOSCALING GROUP NAME> with the ASG name you found in the console.

Optionally change the AWS_REGION to something other than us-east-1 if you are working in a different region.

Deploy the autoscaler:

kubectl apply -f cluster_autoscaler.yaml

Watch the logs:

kubectl logs -f deployment/cluster-autoscaler -n kube-system

Scale out:

kubectl apply -f nginx.yaml
kubectl get deployment/nginx-scaleout
kubectl scale --replicas=10 deployment/nginx-scaleout

Delete the cluster autoscaler and nginx deployments:

kubectl delete -f cluster_autoscaler.yaml
kubectl delete -f nginx.yaml

Delete the horizontal pod autoscaler and load test

kubectl delete hpa,svc php-apache
kubectl delete deployment php-apache load-generator

kubectl delete -f deplyment.yaml