Locust python file. 6 or later to use Locust.
Locust python file common/ __init__. Need Dedicated Support? Locust. Increasing Maximum Number of Open Files Limit. 6 or higher installed before you begin installing Locust. Support for load testing other protocols, reporting etc; Report OTEL traces for requests; Automate distributed runs over SSH; Automatically translate a browser recording (HAR-file) to a locustfile; Workers written in other languages than Jul 18, 2023 · Installing Locust. This file will contain your load testing script. class MyUser ( HttpUser ): Here we define a class for the users that we will be simulating. Usage: locust [options] [UserClass ] Common options: -h, --help show this help message and exit -f <filename>, --locustfile <filename> The Python file or module that contains your test, e. From this module you’re free to import other python code just as you normally would in any Python program. See full list on blazemeter. Locust can be configured to run distributed load testing across multiple instances, and tests can be run via the command line or Locust’s web-based UI. Pip may then be used to install Locust: pip install locust Getting Started with Locust. com Apr 3, 2025 · pip install --upgrade locust Step 2: Create a Locustfile. Locust tests are defined in Python files called “Locustfiles”. This makes it very flexible and particularly good at implementing complex user flows. Load testing is a type of software testing that is conducted to check the tolerance/behavior of the system under a specific expected load. Locust will look for ~/. Locust has been used to simulate millions of simultaneous users. The key feature of Locust is its ability to write test scenarios in plain Python code, making it highly flexible and easy to integrate into any developer’s workflow. py'. locustfile. auth. conf by default, and you can specify an additional file using the --config flag. config. h: No such file or directory Answered in Stackoverflow thread Aug 16, 2023 · Once Python and Locust are set up, we can start scripting our Locust file. py extension and run all of them. py Locust is an open-source load testing tool written in Python. You can start Locust on master node with this command (the Locust file name is my_locustfile. Let's create a . Here’s an example file structure of an imaginary Locust project: Project root. You must provide user behaviour in a Python file in order to utilise Locust for the first time. h: No such file or directory. locust -f my_locustfile. g. The target of locust is load-testing websites and checking the number of concurrent users a system can handle. It excels in creating simple to complex test scenarios that mimic user behavior under load. Feb 22, 2024 · Locust is an open-source, scalable load testing tool that uses Python scripts and a distributed, event-based architecture. Skipping monkey patching; Full example; Third party extensions. requirements. Make sure you have Python 3. Installation works, but the locust command is not found. Finally, we will get the following: A locust file is just a normal Python module, it can import code from other files or packages. conf and . Create a new file named locustfile. 6 or later to use Locust. path, so any python file/module/packages that resides in the working directory can be imported using the python import statement. py. 'my_test. py Open locustfile. py). c:9:10: fatal error: Python. Its developer-friendly approach lets you define your tests in regular Python code. Locust loggers; Using Locust as a library. txt (External Python dependencies is often kept in a requirements. Throughput, response times and errors can be viewed in real time and/or exported for later analysis. ERROR: Failed building wheel for xxx. A Simple Locustfile Example. Locust is an open source performance/load testing tool for HTTP and other protocols. py inside it. But it can do simple tests as well, so let’s start with that: How you structure the test source code is of course entirely up to you, but we recommend that you follow Python best practices. txt) Locust is configured mainly through command line arguments. Battlelog, the web app for the Battlefield games, is load tested using Locust, so one can really say Locust is Battle tested ;). A Locust test is essentially just a Python program making requests to the system you want to test. Mar 23, 2021 · As per the documentation you can keep multiple locust files in a directory and pass the directory name to the argument -f/--locustfile Locust will recursively search for files with . Locust tests can be run from command line or using its web-based UI. io. The current working directory is automatically added to python’s sys. Oct 30, 2022 · Locust is an open-source load-testing tool. Jul 18, 2021 · Note: We need Python 3. psutil/_psutil_common. The two basics of Python which is a must in preparation for locust file are class function and def method blocks. /locust. py in a text editor and prepare to write your API tests. locust. py --master. conf file inside our working directory and try to put there all the arguments we used in the command prompt with their values. Here’s a simple example of a Locustfile to get you started: locustfile. Create a new directory for your project and create a file called locustfile. Create Your First Locustfile: Locust uses a Python script called a Locustfile to define user behavior. cloud provides dedicated commercial support for Locust. py inside your project directory: touch locustfile. 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