K6 부하 테스트

Last updated Jan 2, 2023

Load test

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

Using k6, you can test the reliability and performance of your systems and catch performance regressions and problems earlier. k6 will help you to build resilient and performant applications that scale.

k6 is developed by Grafana Labs and the community.

# Key Feature

k6 is packed with features, which you can learn all about in the documentation. Key features include:
CLI tool with developer-friendly APIs.
Scripting in JavaScript ES2015/ES6 - with support for local and remote modules
Checks and Thresholds - for goal-oriented, automation-friendly load testing

# 사용처

k6 users are typically Developers, QA Engineers, SDETs, and SREs. They use k6 for testing the performance and reliability of APIs, microservices, and websites. Common k6 use cases are:

# Load testing

k6 is optimized for minimal resource consumption and designed for running high load tests (spike, stress, soak tests) .

# Performance and synthetic monitoring

With k6, you could run tests with a small amount of load to continuously validate the performance and availability of your production environment.

# Chaos and reliability testing

k6 provides an extensible architecture. You can use k6 to simulate traffic as part of your chaos experiments or trigger them from your k6 tests.

# 사용할 수 없는 경우

k6 is a high-performing load testing tool, scriptable in JavaScript. The architectural design to have these capabilities brings some trade-offs:

# Does not run natively in a browser

By default, k6 does not render web pages the same way a browser does. Browsers can consume significant system resources. Skipping the browser allows running more load within a single machine.

However, with xk6-browser, you can interact with real browsers and collect frontend metrics as part of your k6 tests.

# Does not run in NodeJS

JavaScript is not generally well suited for high performance. To achieve maximum performance, the tool itself is written in Go, embedding a JavaScript runtime allowing for easy test scripting.

If you want to import npm modules or libraries using NodeJS APIs, you can bundle npm modules with webpack and import them in your tests.