To enable the stale marker option, set the K6_PROMETHEUS_RW_STALE_MARKERS environment variable to true. Community resources. A module with a better and standard API exists. If any of the thresholds had failed, the little green checkmark next to the threshold name (http_req_failed, http_req_duration) would be a red cross and k6 would exit with a non-zero exit code. Developers use k6 to test a system's performance under a particular load to catch performance regressions or errors. For more information, refer to the extension graduation process . This document has two examples, one that uses the core k6 APIs (k6/http and checks) and another to show the more recent APIs (httpx and k6chaijs). 0 if the server supports it, just like your web browser would. js: imports the common scenario and set 1 iteration. Using the newly built k6 generator, you can convert your API specification to a k6 script and use it to load test your API. The scripting API is packed with features that help you simulate real application traffic. warning The k6 gRPC API is currently considered in beta and is subject to change. URL Parses the response body data as JSON and returns a JS object or array. Feb 8, 2024 · APIの負荷テストツールにGrafana Labs社が開発している「k6」というツールがあります。 k6はオープンソースのCLIツールですが、 「Grafana Cloud k6」というクラウドベースSaaSツールも提供されている便利なツールです。 Function Description; connect( url, params, callback ) Create a WebSocket connection, and provides a Socket client to interact with the service. Tip: Debug locally first k6 run api-test. A few functions are available only in init context. Also, the sample repository contains `make commands` as shorthand to execute the test cases. OAuth authentication. The k6/http module contains functionality for performing HTTP transactions. NET Core, specifically testing an API with k6. Load test vus & duration (scenario 1) Full example showcasing all functionality. The encoding module provides base64 encoding/decoding as defined by RFC4648. Though we strongly believe that scriptable, code-based tools will help you get the most out of your performance-testing efforts, a GUI-based tool like the test builder could help you: Jan 30, 2024 · If you have scripted tests before, implementing k6 scripts should seem familiar. warn() console. 0, provides a gRPC client for Remote Procedure Calls (RPC) over HTTP/2. In this case, the test met the criteria for both thresholds. Course Curriculum Summary. Functions ¶ Documentation Grafana k6 JavaScript API k6/http Params. // Using a binary array as body. Parameter Type Description; length: int: Length of the random string: charset (optional) string: A customized list of characters k6 API; k6; k6. This project is available here . It has multiple compatible implementations and storage integrations. js: imports the common scenario and set 100 reqs/s during 3m. The k6/experimental/timers is deprecated and will be removed in v0. The name argument is required. Metrics measure how a system performs under test conditions. Prometheus remote write is a protocol that makes it possible to reliably propagate data in real-time from a sender to a receiver. 0. 29. By default, k6 automatically collects built-in metrics. To check what protocol was used for a particular request, refer to the proto property of the response object. We could start our test getting some data from the GitHub API: Which was the first GitHub issue of the k6 project? Oct 18, 2020 · K6 is an awesome open-source load testing framework written in Go. Apr 28, 2024 · Now that we have discussed some basic theory behind performance testing, it’s time to get into the specifics of performance testing in ASP. Function Description; check(val, sets, [tags]) The k6 browser module emits metrics based on the Core Web Vitals. For other options to analyze test results such as storage and time-series visualizations in real-time, refer to: The k6/net/grpc module, added in k6 v0. k6 introduces browser automation and Prometheus support in k6 OSS - From the Grafana blog: feature announcements at ObservabilityCON 2021. After downloading and extracting the archive for your platform, place the k6 or k6. . Browser Recorder - Record a user journey to create your k6 test. io to construct URLs with/without query parameters. k6 API; k6/metrics; Trend; Trend. Running K6 with 100S of virtual users. The new k6 Jan 1, 2024 · Introdução. All unique identifiers are sequentially generated starting from a base of zero (iterations) or one (VU IDs). Run checks on a value. js files. However, since many browser operations happen asynchronously, and in order to follow the Playwright API more closely, we are working on migrating most Issue an HTTP POST request. User-centered observability: load testing, real user monitoring, and synthetics Learn how to use load testing, synthetic monitoring, and real user monitoring (RUM) to understand end users' experience of your apps. http_reqs metric, the k6 integration tile is installed automatically, and the default k6 dashboard is added to your dashboard list. Issue multiple HTTP requests in parallel (like e. Mar 22, 2024 · # Execute load test using k6 CLI k6 run -e K6_ENV=local -e CUSTOMERS_API_URL=${CUSTOMERS_API_URL} customers-service. When you run a test, k6 outputs a plain-text logo, your test progress, and some test details. Decide the testing frequency for each environment A module with streaming support exists. Must be uppercase. How to use URL and URLSearchParams imported from jslib. The new k6/experimental/webcrypto API partially implements the WebCryptoAPI, supporting more features than k6/crypto. For simplicity to learn about k6 metric results, this tutorial uses the JSON output and jq to filter results. Download the k6 binary. Open source RSS. Open source. Currently there are only a small number of things you can do via this API, but hopefully in the future it will be extended with more end points. An embedded JavaScript engine. For instance, each execution records the request’s duration, contributing to the http_req_duration metric. In distributed/cloud test runs, the test-wide iteration numbers and VU identifiers are still going to be unique across instances, though there might be gaps in the sequences when, for example, some instances execute faster iterations than others or allocate more VUs This could happen at future k6 releases until the module becomes fully stable and graduates as a k6 core module. Integrations & Tools Test authoring Codeless tools to speed up the test creation. Sep 13, 2021 · In this tutorial, we will look into how to integrate performance testing in your development process with AWS CodeBuild and k6. insights Package insights contains the domain data structures and client logic for the k6 cloud Insights API. 50, the experimental module k6/experimental/timers has been graduated, and its functionality is now available in the k6/timers module. When the test is complete, k6 prints a top-level summary of the aggregated results to stdout. These modules are accessed over HTTP(S), from a source like the k6 JSLib or from any publicly accessible web server. Load Testing. If you're running a local test and streaming results to the cloud (k6 run -o cloud), you might want to disable the terminal summary and local threshold calculation, because the cloud service will display the summary and calculate the thresholds. However, this test server may be under load by many k6 learners, so the Although k6 doesn't have any built-in APIs for working with SOAP or XML data in general, you can still easily load test a SOAP-based API by crafting SOAP messages and using the HTTP request APIs. batch()) Response objects that contain HTTP response contents and performance timing measurements. Contracts can also be standard . load-get-api. Test Builder - Inspired by the Postman API Builder. Understand the Basics of K6. The k6 Cloud documentation helps you in your usage of the k6 Cloud. 1 Apr 7, 2023 · Grafana K6 adalah open source load test yang membuat load test menjadi mudah. HTTP, WebSockets, gRPC, Browser, and more. Large extension ecosystem. io. By default, the Azure Pipelines task will print the URL to the test result in Grafana Cloud k6, which you may use to navigate directly to the results view and perform any manual analysis needed. At the moment, the k6 API is synchronous. We then retrieve and return a bearer token to authenticate the next CRUD requests. K6 can be used independently import papaparse from '. Function Description open( filePath, [mode] ) Opens a file and reads all the contents into memory. /papaparse. error() Note: console. io; grpcbin. Scripting examples on how to use OAuth authentication in your load test. For the purposes of this article k6 API; k6; check( val, sets, [tags] ) check( val, sets, [tags] ) suggest edits. Sep 13, 2020 · The changes, compared to the previous configuration, are: Authenticate to the k6 Cloud using K6_API_TOKEN environment variable when running the command k6 login cloud --token ${K6_API_TOKEN}. Apr 16, 2024 · Note: Replace the cloud token value in the example with the k6 token you just copied from the dashboard. Sep 25, 2021 · Abrir a pasta criada para o seu projeto Criação dos cenários de teste de carga. export const options Response is used by the http. Backed by 20 years of experience. It also registers the services endpoints like pprof Index ¶ func GetServer(runCtx context. The k6 API supports the following console-logging methods: console. Get your metrics into Prometheus quickly Issue multiple HTTP requests in parallel (like e. Function Description; check(val, sets, [tags]) Runs one or more checks on a value and Using the InfluxDB extension, you can store k6 metrics in InfluxDB v2. Selain untuk load test, K6 juga dapat digunakan untuk API test. Parameter Type Description; event: string: The event name to define a handler for. Starting on k6 v0. Our GitHub Releases page has a standalone binary for all platforms. This class can produce authenticated requests to send to AWS APIs using the http k6 module. Optionally, you can install the k6 integration tile following these instructions: Log in to Datadog. Stress tests are a type of load testing that verifies the stability and reliability of the system under conditions of heavy use. The first time Datadog detects the k6. Finally, you close the page and the browser. k6 is an open-source load testing tool for testing the performance of APIs, microservices, and websites. For details about the runtime, refer to the Test lifecycle. Executors configure how long the test runs, whether traffic stays constant or changes, and whether the workload is modeled by VUs or by arrival rate (that is, open or closed models). Init context Before the k6 starts the test logic, code in the init context prepares the script. NET Core API for Performance Testing. If you’re running a local test and streaming results to the cloud (k6 run -o cloud), you might want to disable the terminal summary and local threshold calculation, because the cloud service will display the summary and calculate the thresholds. suggest edits. smoke-get-api. ℹ️ Identifiers. The performance of Go, the scripting familiarity of JavaScript. To migrate your scripts, replace all k6/experimental/timers imports with k6/timers. Avoid using group with async functions or asynchronous code. This section provides some conceptual background about the core vitals. Kita dapat run load test dengan command. Groups do the following tasks internally: For each group() function, k6 emits a group_duration metric, which contains the total time to execute the group function. Check Javascript API; Failing a load test using checks; k6chaijs: The name argument is required. Then, you can copy the test script and run the test from the CLI. # Execute load test make load-test Test Results. Trend is an object for representing a custom metric that allows for calculating different statistics on the added External JavaScript libraries for k6. You can customize tags as you wish. If you need the response body for some requests, override the option with Params. When streaming, use --no-thresholds and --no-summary. When you make HTTP requests in k6, k6 automatically upgrades the connection to HTTP/2. Issue any type of HTTP request. Context, addr string, profilingEnabled bool, ) *http. k6 Custom Metrics API. 52. You can have multiple SharedArrays and even load only some of them for given VUs, though this is unlikely to have any performance benefit. js --out cloud tells k6 to output results to the cloud. To learn more about all the types of k6 metrics, read the k6 Metrics guide. Subscribe to our newsletter! Product developments and news from the k6 community. Dashboard templates. This k6 output can mark the time series at the end of the test as stale. responseType. The imported modules are downloaded and executed at runtime, making it extremely important to make sure you trust the code before including it in a test script. Chegou momento de criarmos nossos cenários de teste de carga, pra isso precisamos de uma API para testar e com Jun 7, 2023 · k6 run load_api. After the test finishes, k6 prints the full details and summary statistics of the test metrics. A simple REST and WebSocket web application. Build the k6 version. By default, tags have a name field that holds the value of the request URL. This could happen at future k6 releases until the module becomes fully stable and graduates as a k6 core module. Test steps. Design and execute Sample Test Script. This call caches the deserialized JSON data, additional calls will return the cached data. stress-get-api. Using k6 browser. The new k6/experimental/grpc module extends k6/net/grpc to support gRPC streaming. Metrics. Run both browser-level and protocol-level tests in a single script. Performance testing with k6 - On API performance testing, with Open API and TypeScript. In this webinar, learn how Grafana Cloud k6 offers you the best developer experience for performance testing. If you need a place to learn k6 and test your scripts, you can use these playground/demo applications: test-api. : filename: string: The filename to specify for this field (or "part") of the multipart request. Issue an HTTP GET request. Parameter Type Description; method: string: Request method (e. Aug 10, 2023 · In the following example, we instruct k6 to execute a function sending HTTP GET requests to k6’s test API 3 times. json files if there's no need to compose complex contracts from multiple objects. test. js. k6 tests are written in JavaScript, and the design of the k6 API has similarities with other testing frameworks. The k6 module contains k6-specific functionality. g. Define the HTTP requests and methods you want to use. See the example and the API below. Multiple Protocol support. The Browser module brings browser automation and end-to-end web testing to k6 while supporting core k6 features. browsers tend to do). Sep 19, 2019 · Because the GitHub GraphQL API runs over HTTP, and the GraphQL queries or mutations requires a JSON-encoded body, you will use the http. Os Testes de Performance e Carga são fundamentais para garantir que um sistema ou aplicação possa lidar eficientemente com o volume esperado de usuários e transações. Group URLs under one tag . Function Description; randomIntBetween(min, max) Random integer in a given range: randomItem(array) Random item from a given array: randomString(length, [charset]) k6 API; k6/encoding; k6/encoding. Performance testing can vary based on the application under the test. 0, we support unary gRPC requests. The metrics module provides functionality to create custom metrics of various types. Codeless UI tool to generate a k6 test quickly. Promotion Video Walkthrough. Parameter Type Jan 30, 2024 · In some testing conversations, stress tests might also be called rush-hour, surge, or scale tests. Scripting examples using URL and URLSearchParams modules. Lalu akan muncul hasil seperti ini pada terminal anda. To build a k6 binary with the extension, first, ensure you have installed Go and Git; the following steps are: JavaScript API The list of k6 modules natively supported in your k6 scripts. To learn more about configuring workloads in k6, check out Scenarios. You can extend k6 to support your needs. Setting up an ASP. Function Description; b64decode(input Jun 29, 2021 · ‘k6’ is an open-source, free, and developer-centred load test tool that has been designed to make performance testing a productive and pleasurable process. This release introduces a fully Async API for the k6/browser module. k6 adds tags to the requests, making it easier to filter results. post function to generate requests to hit the API. IDE extensions Code k6 scripts in your IDE of choice. Decide the testing frequency for each environment Stale trend metrics. Jun 25, 2024 · Package cloudapi contains several things related to the k6 cloud - various data and config structures, a REST API client, log streaming logic, etc. Understand API Performance Testing. The k6 Test Builder provides a graphical interface to generate a k6 test script based on your input. grafana/test-api. It adds browser-level APIs to interact with browsers and collect frontend performance metrics as part of your k6 tests. Documentation Grafana k6 JavaScript API k6. log() console. Use this command: k6 run --out cloud create-and-fetch-todo-http-request. exe binary in your PATH to run k6 from any location. Get in touch. Experimental modules maintain a high level of stability and follow regular maintenance and security measures. See full list on k6. * methods that generate HTTP request. We recommend using the new module. Making SOAP requests Oct 28, 2023 · よっしー こんにちは。よっしーです(^^) 今日は、APIの負荷テストについてご紹介します。 背景 Dockerで構築したWebアプリの開発環境において、k6を利用した負荷テストについて調査したときの内容を備忘として残しました。 Aug 30, 2018 · The k6 REST API As described in the previous article , k6 will by default fire up an API server on TCP port 6565, where it exposes the command-and-control API. This module aims to provide rough compatibility with the Playwright API, so you don’t need to learn a completely new API. K6 is used by Amazon, Microsoft, Grafana, Gitlab, Citrix, etc. When a taggable resource—a check, request, or custom metric—runs within a group, k6 sets the tag group with the current group name. This means that nearly all the methods in the module now return promises. Slack, Meetup, Twitter, Stack Overflow, LinkedIn, and more. Using k6 extensions. open( filePath, [mode] ) Random item from an array. k6 provides the Tags and Groups APIs to help you during the analysis and easily visualize, sort and filter your test results. This change is part of the ongoing effort to make the browser module more user-friendly and easier to use. All metrics (both the built-in metrics and the custom ones) have a type. When the test is complete, k6 prints a top-level summary of the aggregated results . k6 considers this test a pass and exits with an exit code 0. Try out and share prebuilt visualizations. The load is small, so the server should perform within thresholds. It is highly efficient and capable of generating high loads with hundreds of concurrent connections. Run K6 dengan command vus & duration. Make sure to open() the file as binary Dec 19, 2023 · # Execute load test using k6 CLI k6 run -e K6_ENV=local -e CUSTOMERS_API_URL=${CUSTOMERS_API_URL} customers-service. 'POST'). Starting with k6 v0. Prometheus exporters. But, unlike other tests, load tests run their scripts hundreds, thousands, or millions of times. k6 を使い始めるにあたり、まずは環境構築が必要です。以下の環境で進めていきます。 macOS: Sonoma 14. If your test has dynamic URL paths, you might not want this behavior, which could bring a large number of unique URLs into the metrics stream. Then, you can use check from the k6 API to assert the text content of a specific element. Property Description; browser: The browser module API is the entry point for all your tests. js VIII. The goal is to assess the behaviour of the system when subjected to typical usage patterns To authenticate requests to AWS APIs using AWS Signature Version 4, k6 offers the k6-jslib-aws JavaScript library, which provides a dedicated SignatureV4 class. k6 run api-test. K6 gratis, developer-centric, dan extensible. The method blocks the test finalization until the connection is closed. gRPC is a lightweight open-source RPC framework. Instead, k6 keeps track of the rate of failed checks as the test continues to run. A full-featured API. Mar 14, 2020 · Generating k6 scripts from Swagger/OpenAPI specifications has never been easier. The following examples take a set of arguments, shown in the function documentation, and returns the response body as JSON so that you can extract the token from. Variables ¶ This section is empty. If you do, k6 might apply tags in a way that is unreliable or unintuitive. js'; import { SharedArray } from 'k6/data'; // not using SharedArray here will mean that the code in the function call (that is what loads and // parses the csv) will be executed per each VU which also means that there will be a complete copy // per each VU const csvData = new SharedArray('another data name', function { // Load CSV file and parse it using If you need the response body for some requests, override the option with Params. Here is an overview of how k6 load testing operates: Test Script Creation; Virtual User Simulation; Load Generation; Performance Monitoring; Analysis and Reporting; Iterative Testing and Optimization Jan 8, 2023 · The k6 browser API aims to provide a rough compatibility with the Playwright API for NodeJS, meaning k6 users don’t have to learn an entirely new API. io Aug 10, 2023 · Introducing k6 — a cutting-edge tool that promises to revolutionize the way you conduct we can control and scale an execution via k6’s REST API or the CLI. k6. In distributed/cloud test runs, the test-wide iteration numbers and VU identifiers are still going to be unique across instances, though there might be gaps in the sequences when, for example, some instances execute faster iterations than others or allocate more VUs k6/browser has now a fully Async API browser#428. debug() will log output only when you run k6 with the -v/--verbose flag. Here's an auto-generated k6 test script showcasing all examples from the Chaijs API documentation. k6. handler: function: The function to call when the event happens. A Advanced Examples using the k6 Scenario API - Using multiple scenarios, different environment variables and tags per scenario. Empower your development workflow with IDE extensions. a. If you use one or more k6 extensions, you need a k6 This is a complete example of API contract validation in k6 using the expect library. Jul 3, 2023 · k6 load testing works by simulating virtual users (VUs) that interact with your web application or API. /api_contracts folder as . k6 The k6 By default, k6 prints summarized results to stdout. Copy. For each k6 scenario, the VU workload is scheduled by an executor. The k6 Cloud is the perfect companion to k6 with an aim to bring ease-of-use and convenience to scale your performance testing efforts. VUs are completely separate JS VMs, and k6 needs some way to identify the SharedArray that it needs to return. Scenario executors. Visual Studio Code Extension - Run k6 Jun 25, 2024 · Package api contains the REST API implementation for k6. The k6/net/grpc module provides a gRPC client for Remote Procedure Calls (RPC) over HTTP/2. The sample repository contains make commands as shorthand to execute the test cases. Logs can help you troubleshoot your test execution. Did the threshold fail? If not, add another stage with a higher target and try again. : devices: Returns predefined emulation settings for many end-user devices that can be used to simulate browser behavior on a mobile device. The k6/crypto module provides common hashing functionality available in the GoLang crypto package. Jan 9, 2024 · Web アプリケーションや API の負荷テストに使えるツール、k6 を試してみました。この記事では、k6 の基本的な使い方についてご紹介します。 環境構築. Contracts are stored in . Server; Constants ¶ This section is empty. Involves testing an application’s performance under expected loads. This also means that API k6 API; k6/ws; connect( url, params, callback ) connect( url, params, callback ) suggest edits. Params. * methods that generate HTTP requests. js: imports the common scenario and set 1500 reqs/s during 3m. k6 run --vus 400 -–duration 60s load_api. Jun 12, 2023 · Smoke Test Graph 2. 0 and analyze your performance results with Grafana or other tools. Grafana k6 REST and WS Play Collection of HTTP and WebSocket APIs for experimentation with k6 Note that this is a shared testing environment - please avoid high-load tests. In the setup() stage we create a user for the k6 HTTP REST API. debug() console. info() console. Params is an object used by the http. When to perform a stress test. Those methods return one (or more, in the case of http. Load testing HTTP/2 with k6. With that done, we can now go ahead and git add, git commit and git push the changes we have made in the code and initiate the CI job. If you start promise chains or even use await within group, some code within the group will be waited for and tagged with the proper group tag, but others won't be. note To work with the browser module, make sure you are using the latest k6 version , and install a Chromium-based browser on your machine (such as Google Chrome ). Test servers. The end-of-test summary shows aggregated statistical values for your result metrics, including: Examples Get started with k6 Single request HTTP Authentication OAuth Authentication Correlation and Dynamic Data Data Parameterization Parse HTML HTML Forms Cookies Example Data Uploads API CRUD Operations Generating UUIDs HTTP2 WebSockets SOAP Transport Layer Security (TLS) Generating realistic data Crawl a web page Bundling and transpilation Functional testing Track transmitted data per URL Suspends VU execution for the specified duration. With each HTTP request, k6 accumulates measurements encompassing a range of execution characteristics. Repeat until the threshold aborts the test: bash Copy. Besides built-ins, you can also make custom metrics. 2. Now you can execute your load tests. A check is a test condition that can give a truthy or falsy Documentation Grafana k6 JavaScript API Init context open( filePath, [mode] ) Open source. The real power of the browser module shines when it’s combined with the existing features of k6. k6 automatically creates dashboards with test results when the execution fail() is a simple convenience wrapper on top of JavaScript's throw(), because the latter cannot be used as [expr] || throw, which is a convenient way to write k6 test code. Remote HTTP(S) modules. Get support from the k6 team and community. Ramp-up and Ramp-down Users Parameter Type Description; data: string / Array / ArrayBuffer: File data as string, array of numbers, or an ArrayBuffer object. bs gb wr nh ne hf mc vz ec yj