Getting Started with K6

Load Testing:-

Load testing is an effective way how your application is going to behave before it Goes to production.

What is k6?

Grafana k6 is an open-source load testing tool that makes performance testing easy and productive for engineering teams.

Installation:-

k6 has packages for Linux, Mac, and Windows. As alternatives, you can also use a Docker container or a prebuilt binary.

For ubuntu:-

sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys C5AD17C747E3415A3642D57D77C6C491D6AC1D69
echo "deb https://dl.k6.io/deb stable main" | sudo tee /etc/apt/sources.list.d/k6.list
sudo apt-get update
sudo apt-get install k6

For mac:-

brew install k6

For windows:-

winget install k6

Let's Get started by Running a Simple Script on a Local Machine:-

Step 1:-

Copy the code below, paste it into your favorite editor, and save it as script.js

import http from 'k6/http';
import { sleep } from 'k6';

export default function () {
  http.get('https://test.k6.io');
  sleep(1);
}

Step2:-

Then, run k6 with this command:

k6 run script.js

Lets Add some More Virtual User :-

Step3:-

Run a load test with more than one virtual user and a longer duration:

k6 run --vus 10 --duration 30s script.js

Step4:-

There is another option Instead of typing --vus 10 and --duration 30s each time you run the script, you can also include the options in your JavaScript file:

import http from 'k6/http';
import { sleep } from 'k6';
export const options = {
  vus: 10,
  duration: '30s',
};
export default function () {
  http.get('http://test.k6.io');
  sleep(1);
}

Step5:-

And after that run the command

k6 run script.js

Step6:-

Also, we can Increase and Decrease Virtual User Load By Using K6

To configure ramping, use the options. stages property.

import http from 'k6/http';
import { check, sleep } from 'k6';

export const options = {
  stages: [
    { duration: '30s', target: 20 },
    { duration: '1m30s', target: 10 },
    { duration: '20s', target: 0 },
  ],
};

export default function () {
  const res = http.get('https://httpbin.test.k6.io/');
  check(res, { 'status was 200': (r) => r.status == 200 });
  sleep(1);
}

K6 support test Execution in Diffrent Enviroments

• private/on-prem

• Cloud

• Cluster

Step7:-

Let's see how we can run K6 In a cloud Environment

To run cloud tests from the CLI:

• Register a k6 Cloud account.

• Log in to your account via the CLI.

• Use the k6 cloud command to run the script you already have.

k6 cloud script.js

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