Grafana k6

What is Grafana k6?

Grafana k6 is an open-source load testing tool and cloud service that lets developers and QA engineers script, run, and scale performance tests. Grafana k6 differentiates itself through a JavaScript-based scripting environment and a single script that runs unchanged across local machines, Kubernetes, and the cloud.

Key Features

• JavaScript scripting: Tests are written in JavaScript using a familiar import-and-export module structure, with built-in modules for HTTP requests and checks, so developers can author load tests without learning a proprietary DSL.
• Protocol and API coverage: Scripts can exercise HTTP, GraphQL, gRPC, WebSocket, and cookie-based flows, allowing one tool to cover a range of API and service types.
• Threshold configuration: Thresholds can be configured in scripts to define pass/fail criteria for test runs, supporting SLO tracking and regression detection.
• Local, Kubernetes, and cloud execution: The same script runs via k6 run script.js locally, via kubectl apply -f k6.yaml on Kubernetes, or via k6 cloud script.js in Grafana Cloud k6, so teams can migrate from local to distributed testing without rewriting tests.
• 21 load zones: Cloud tests can be run from 21 load zones to simulate real global traffic patterns.
• Multiple test types from one tool: Beyond load testing, k6 Open Source is extensible to support stress, spike, soak, and smoke tests, end-to-end web testing with real browsers and frontend metrics, synthetic monitoring, fault injection for Kubernetes-based apps, infrastructure testing, and continuous regression testing.
• Integrations: k6 integrates with developer tools including Postman, New Relic, Visual Studio, Grafana, IntelliJ IDEA, and Datadog.
• Extensions: Extensions add capabilities such as Kubernetes, Prometheus, Pub/Sub, Amazon SQS, Kafka, and OpenTelemetry support.

Use Cases

• Backend and frontend engineers: Run performance tests early and continuously to catch regressions before they reach production.
• Site Reliability Engineers: Test scalability against reliability targets, validate SLOs, and avoid SLA breaches.
• Software Engineers in Test and QA: Shift performance testing left and collaborate with developers on continuous testing rather than treating it as a separate QA phase.
• Platform and infrastructure teams: Test how cloud-native systems scale, isolate bottlenecks, and plan infrastructure capacity, including fault injection on Kubernetes-based applications.
• Operations teams monitoring production: Reuse existing k6 tests with Synthetic Monitoring to continuously verify production environments instead of relying on traditional ping testing.

Who It Is For

Grafana k6 targets engineering teams that need performance testing without a heavy tooling investment: backend and frontend developers, site reliability engineers, and software engineers in test or QA. It solves the problem of load testing being a siloed, awkward task by making tests scriptable in JavaScript, runnable from a developer's own machine up to distributed cloud execution, and reusable across load testing, browser testing, synthetic monitoring, and regression testing.

Pricing

Grafana k6 is offered as open source software alongside a SaaS product, Grafana Cloud k6. The source material does not state specific prices or free-tier terms.

Frequently Asked Questions

What is Grafana k6 used for?

Grafana k6 is used for load testing applications to verify they can handle expected traffic, and it extends to stress, spike, soak, and smoke tests, end-to-end web testing, synthetic monitoring, fault injection, infrastructure testing, and regression testing.

Is Grafana k6 free?

Grafana k6 is available as open source software, and a cloud service, Grafana Cloud k6, is offered as a SaaS product. The source material does not specify pricing details for the cloud service.

What language are Grafana k6 tests written in?

Grafana k6 tests are written in JavaScript. Scripts import modules such as k6/http and k6, define a default function, and use checks to validate responses.

Can the same Grafana k6 script run locally and in the cloud?

Yes. Grafana k6 uses the same script for local, distributed, and cloud tests, so a test can move from k6 run script.js locally to k6 cloud script.js in Grafana Cloud k6, or to Kubernetes via kubectl apply -f k6.yaml.

Which tools does Grafana k6 integrate with?

Grafana k6 integrates with Postman, New Relic, Visual Studio, Grafana, IntelliJ IDEA, and Datadog, and its extensions add support for Kubernetes, Prometheus, Pub/Sub, Amazon SQS, Kafka, and OpenTelemetry.