Clone this repository and install metrics server. Please do note that this setup is good for dev/qa environment. A lot of considerations must be put while installing metrics server in production environment. The official metrics-server repository is kept at https://github.com/kubernetes-incubator/metrics-server and we are using the same repo with few changes.

Install the metrics server

cd metrics-server

kubectl create -f .

It is mandatory to set requests on cpu utilization as HPA requires CPU metrics.

kubectl create -f hpa.yaml

kubectl get hpa 
NAME    REFERENCE          TARGETS   MINPODS   MAXPODS   REPLICAS   AGE
nginx   Deployment/nginx   0%/40%    3         5         3          55s

Apache Bench (ab) is a load testing and benchmarking tool for Hypertext Transfer Protocol (HTTP) server. It can be run from command line and it is very simple to use. A quick load testing output can be obtained in just one minute

apt-get install apache2-utils

kubectl get svc

ab -n 500000 -c 1000 http://10.97.161.152/

-n requests Number of requests to perform

-c concurrency Number of multiple requests to make at a time