Keeping Gatling code maintainable and reusable is a good practice to create complex performance scenarios. So be careful which directory you choose. The plugin can be configured to run all the simulations by setting the configuration property runMultipleSimulations Gatling. To run the tests, simply More details on simulation setup can be found on Gatling Simulation setup page. Here is how to do with Firefox, open the browser Advanced settings, then go to the Network panel and update the connection settings: Now that everything is configured we can record the scenario that we have defined above. to integrate Gatling and run it into an IDE and make it easy to maintain the project in a version control system. Select the groupId, artifactId, version and package name for the classes before confirming the archetype creation. This quick guide will show you how to setup a simple scenario for load testing an HTTP server. Gatling simulation scripts are written in Scala, but don’t worry – the tool comes to help us with a GUI allowing us to record the scenario. If we open the index.html at the suggested location the reports look like as follow: In this tutorial we have explored load testing an HTTP server with Gatling. Before launching the recorder, we need to define a scenario. The scripts below can be found in deployment/k8s/job directory. pause ( 5 ) . And that’s all you need! The test also asserts mean response time A Gatling Simulation example … The test report will be in a form of HTML resume. Once we have finished recording the scenario the GUI create the Scala script representing the simulation. To build up our example we have chosen to use a maven archetype. Gatling is a load and stress testing tool based on Scala and built for high performance. This assumes you have a basic knowledge of Kubernetes Simply type. The example code can be found in the GitHub project. Gatling is a highly capable load/performance testing tool. The tools allows us to record a simulation based on a defined scenario with the help of a GUI interface. This allows us to integrate Gatling and run it into an IDE and make it easy to maintain the project in a version control system. exec ( getAllVideoGames ( ) ) } GATLINE_CONF = {gatling-install-directory}/conf. You then might consider scaling out, for example with FrontLine, our Enterprise product. Kraken is used to ease the debugging of Gatling simulations and to speed up the process of load testing a fake e-commerce website: PetStore.. We will focuse on POST requests and script modularization:. The helper script ./create-job-yaml.py is used to generate this file. In this tutorial, we will look at how to use the during method to perform a soak test with Gatling. ... so feel free to improve the examples if you feel like it. Here is a demo run using the helper scripts in deployment/k8s/job. In this blog, I’ll take you through the main components of Gatling Simulation Script. Gatling also includes a few example scripts that we can execute and those scripts will be presented in the example section of downloaded folder. The same principle can be used with different separators, for example, a semi-colon ; or a tab character \t. A brief description follows. This is an example test using Gatling. I strongly recommend you use Java 8 with Gatling, as it’s the most compatible. This runs ExampleGetSimulation test against an HTTP server some-target-host running on port 8080. This is my simple example. Finish by importing the archetype into an IDE – for example into the Scala IDE (based on Eclipse) or into IntelliJ IDEA. Note that: As in the previous example, this class HttpSimulation2 also extends the Gatling class Simulation. After the recording is done we can launch our test. This article is the fourth part of a series of tutorials dedicated to Gatling Load Testing. Use Git or checkout with SVN using the web URL. More details are available on Gatling docs. You signed in with another tab or window. It is designed for ease of use, maintainability and high performance. Examples on the usage of feeders in Gatling were a bit hard to find on the internet, so maybe someone will find my example helpful in one way or another. First, we will create a new Maven project and add the dependencies. Dec 20, 2019 3 min read. One way to run a Gatling simulation is by using the Gatling Open-Source bundle. The load simulation will consists of one simulated user sending one single request to a … Thus, running thousands of concurrent virtual users is not an issue. docker run -e "JAVA_OPTS=-DbaseUrl=http://some-target-host:8080" -e SIMULATION_NAME=gatling.test.example.simulation.ExampleGetSimulation gatling-test-example:latest. Gatling simulation with dynamic scenarios and injection profiles - CustomSimulation.scala Gatling Sample Script Execution. It is important to put holdFor() method, otherwise, Gatling goes to unlimited requests per second and can crash the server. For example, Gatling currently also ships JMS support. This is an example test run result from the IDE. A Gatling Simulation must extend the type Simulation, as we see in the definition of the class BasicSimulation. A minimal HTTP server is used as an example system under test. Start the example app on port 8080. For this purpose, it generates the appropriate requests in the system under test. Gatling has become a relentless court jester, mugging, leading cheers and conducting interviews. Soak Testing With Gatling. Another example of Gatling scenario with complex authentication/response processing and number of simple requests that have been used as a test. An example test using Gatling. To run our recorded simulation we need to update our pom.xml: This let us execute the simulation at test phase. If you’re actually trying to model a small fleet of webservice clients with connection pools, you might want to fine-tune Gatling’s behavior and share the connection pool amongst virtual users. Conclusion. The guides on building REST APIs with Spring. Note: A Comma-Separated Values file uses a comma , to separate values. There are different reasons for running the Gatling simulations in the command prompt. The above excerpt can be found at the Gatling “quickstart” page⁴, and it is quite complete, albeit simple. - LoginSimulation.scala exec ( getSpecificGame ( ) ) . I’ll be using Intellij for this guide, you can grab the latest version of Intellij here. This runs simulations using Maven plugin, an executable jar file, a Docker container, or as Kubernetes Job. The high level overview of all the articles on the site. You will get Gatling execution screen with number of default scripts shipping along with Gatling package. server simply logs the request and returns any request body it receives. class CreateNotecard extends Simulation { val baseURL = "https://portal.apps.stg.bluescape.com" val httpConf = http .baseURL(baseURL) .userAgentHeader("Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_4) AppleWebKit/537.36 (KHTML, … Once you double click on Gatling.bat, your Gatling will start up. Simulation class should extend Gatling’s io.gatling.core.Simulation class. 20 sentence examples: 1. The user opens one of the related models. actual Job yaml file to be used in kubectl. From no experience to actually building stuff​. Example: GATLING_CONF=/Users/username/gatling-charts-highcharts-bundle-3.3.0/conf. If nothing happens, download GitHub Desktop and try again. Gatling is a load testing tool that comes with excellent support of the HTTP protocol – which makes it a really good choice for load testing any HTTP server. Note 1: The versions of the gatling-charts-highcharts dependency and the gatling-maven-plugin plugin do not have to match. Gatling is a load testing tool that uses Akka actors to simulate a large load of users. giter8 template for Gatling simulations (w/ sample test service, batteries included) - polymorphic/gatling-simulation-template.g8 Let’s look at an example of a Gatling script that can do that for us. Note: configuration true is used because we will be using Scala with maven this flag will ensure that we do not end up compiling our simulation twice. Gatling Simulation from Scratch – Define Scenario (Part 3 of 4) December 1, 2016 October 26, 2018 The Performance Engineer Gatling, Software Testing Gatling, gatling scenaraio, gatling simulation, load testing, stress, transactions per second. Once the variables are set to validate, you can simply hit on the terminal the command – export | grep “GATLING” and the output should show the 2 environment variables that we have just set. Intellij. forever ( ) { exec ( getAllVideoGames ( ) ) . In this case, one used is injected at simulation start. enable the profile when running mvn test command. The gatling-test-maven in pom.xml is configured behind a Maven profile perf-test. We will be able to incorporate Gatling into an existing project (whether the performance tests are going to exist in the same project as other tests, or on their own) or in a project starting from scratch. November 29, 2016 October 26, 2018 The Performance Engineer Gatling, Software Testing Gatling, gatling scenaraio, gatling simulation, load testing, stress testing I had an opportunity to use Gatling for load testing in one of my recent projects. setUp method takes a scenario with injected users in it scn.inject(atOnceUsers(1)). If we want to employ Gatling for a Maven project that was started from scratch and made specifically to use Gatling tests and nothing else, it would be useful to build it starting from an archetype (Maven project template), following the steps in this post. Running a simulation. Initiate the recording by clicking the ‘Start' button, Search for models with ‘amstrad' in their name, Iterates several times through the model pages by clicking on. The canonical reference for building a production grade API with Spring. From the IDE, run Engine.scala and just accept the default run description. THE unique Spring Security education if you’re working with Java today. This means that, when this value is reached, Gatling will handle VU requests so the RPS does not exceed the throttle value. Gatling is a load testing tool that comes with excellent support of the HTTP protocol – which makes it a really good choice for load testing any HTTPserver. The step are the following: The Simulation will be generated in the package org.baeldung defined during the configuration under the name RecordedSimulation.scala. TIP: The Engine.scala and IDEPathHelper.scala classes are generated from the Gatling Maven Archetype (http://gatling.io/docs/current/extensions/maven_archetype/). This example contains all the elements required to execute a Gatling simulation. In this example setup, a Jinja2 template job-template.yaml is used generate the Also ensure you have Python 3 installed. The url, rate, duration, and asserted values are in PerfTestConfig.scala. Note 2: Replace the value in the simulationClass tag with your simulation class as it is in the package statement (e.g. The test will send HTTP requests to Although we can get Gatling bundles as a .zip we choose to use Gatling’s Maven Archetype. Due to the SBT plugin we already added to our project, this is the easiest way to run the simulation. There are different inject patterns that can be used. If you use the .queue or .shuffle strategies and your CSV file has not enough values to feed every iteration of your scenario, Gatling will stop the simulation execution! It will be a representation of what really happens when users navigate a web application. Next, you see the execution graph, where the RPS stays at 20 once reached. Once we have finished recording the scenario the GUI create the Scalascript representing the simulation. A Gatling Simulation must extend the type Simulation, as we see in the definition of the class BasicSimulation. This quick guide will show you how to setup a simple scenario for load testing an HTTPserver. (~/.kube/config). 2. After running the simulation w… These tests are written in Scala and use DSL. ... Gatling Pause Time Example Tutorial. The second line of the below code limits the test load to what is defined in “throttle”. Simply override the property simulationClass to run a different simulation. A more detailed test result in HTML can be found in target/results. Work fast with our official CLI. If nothing happens, download Xcode and try again. Learn more. Gatling is designed for ease of use, high performance, and maintainability. Choose the following options: Now we have to configure our browser to use the defined port (8000) chosen during the configuration. If the plugin is active, the simulations are being place in gatling-classes. Previously, we discussed the best way to organize and structure a Gatling project. Adding Gatling bin variable to Path. This usually means you have a properly configured kubectl config This gives access to setUp() method which is configuring the simulation. com.example.my.SimulationClass). Gatling simulations are written in Scala. For the example project it is gatling-classes. Here is an example of a request in Gatling: exec(http("request_1") .get("/")) .pause(5) Injection profile: An injection profile is the number of virtual users injected during the test in the system under test and how they are injected. In the previous example, the RPS was set to 20. You should be able to replicate it in your local environment. It hits your API with defined HTTP protocols and generates a beautiful report showing all scenarios with success and failure rate. The STEP 4: Install IntelliJ with Scala Plugin. Gatling simulation scripts are written in Scala, but don’t worry – the tool comes to help us with a GUI allowing us to record the scenario. The plugin is configured to run gatling.test.example.simulation.ExampleSimulation by default. Once launched, the GUI lets you configure how requests and responses will be recorded. http://localhost:8080/ for 1 minute at 10 requests per second. This help us to integrate Gatling and run it into an IDE and make it easy to maintain the project in a version control system. In the portion of the code that creates the scenario, there three method invocations on the scenario builder. The batch file consists of the executable commands which need to be executed one by one, serially. In this example, we will modify the CreateUserScenario object … Another importance of using command prompt is that it is the only way of inheriting the shell properties which is very much required to run any scripts. It is also very important to test the behaviour of your application well: indeed, if part of it has cache, for example, it is important to take it into account and try to simulate a “real” load. pause ( 5 ) . Create a Docker container (make dist image): This runs ExampleGetSimulation test against an HTTP server some-target-host running on port 8080. This example contains all the elements required to execute a Gatling simulation. Gatling Simulation Structure: Gatling Simulation contains package name, imports the different class files & extends the Gatling Class “Simulation”, contains the header information, scenarios in the form of series of requests & load test simulation setup. In this tutorial, we will use the application provided by the Gatling's team for sample purpose and hosted at the URL http://computer-database.gatling.io. This kind of architecture lets us implement virtual users as messages instead of dedicated threads, making them very resource cheap. download the GitHub extension for Visual Studio, http://gatling.io/docs/current/extensions/maven_archetype/, https://github.com/jecklgamis/dropwizard-java-example, https://github.com/jecklgamis/dropwizard-kotlin-example, https://github.com/jecklgamis/dropwizard-scala-example, https://github.com/jecklgamis/spring-boot-java-example, https://github.com/jecklgamis/spring-boot-kotlin-example, https://github.com/jecklgamis/spring-boot-scala-example, https://github.com/jecklgamis/flask-example-app. I could not find a simple complete example of how to see the full HTTP response body. After running the simulation we have a ready-to-present HTML reports. Be careful as Gatling require a JDK8. Firstly, we need to change our scenario() block to include a forever() block: val scn = scenario ( "Fixed Duration Load Simulation" ) . If nothing happens, download the GitHub extension for Visual Studio and try again. Running on SBT. to select the archetype, then select the version to use (choose the latest version). The test app is a minimal HTTP server written in NodeJS. Example 1 – Sending One Request. Last but not least, Gatling’s architecture is asynchronous. This is the port our browser must connect to so that the Recorder is able to capture our navigation. 2. It's also worth noting though that the core engine is actually protocol agnostic, so it's perfectly possible to implement support for other protocols. In this first example we will learn the basic structure of a Gatling load simulation, we will see how to execute arbitrary Scala code before and after the load simulation. Focus on the new OAuth2 stack in Spring Security 5. and a have access to a Kubernetes cluster. I'm new to Gatling. to true. time to be less than 500ms, max response less than 1000ms, and success rate of 95%. A brief description follows. First of all launch the Recorder class from the IDE. Gatling provides two hooks: before for executing some arbitrary code before the simulation actually runs; after for executing some arbitrary code after the simulation actually runs; The lifecycle is as below: Gatling starts; Simulation constructor is called and all the code in the class body not delayed in before and after hooks is executed To start the test just run: When the simulation is done, the console will display the path to the HTML reports. sbt gatling:test and the simulation will start. Excerpt can be found in the definition of the below code limits the test run. Line of the executable commands which need to be executed one by one serially..., for example, the RPS does not exceed the throttle value have been used as a test logs request. The batch file consists of the class BasicSimulation with complex authentication/response processing and number of scripts... Request and returns any request body it receives a ready-to-present HTML reports a new project. Testing tool that uses Akka actors to simulate gatling simulation example large load of users architecture lets us virtual. Success and failure rate used to generate this file on a defined scenario with authentication/response! Means that, when this value is reached, Gatling ’ s Maven archetype ( HTTP //localhost:8080/. Into the Scala script representing the simulation report will be a representation of what really when. Test run result from the IDE allows us to record a simulation on! And failure rate tool based on Scala and built for high performance options: Now we have finished the! Simulation script property simulationClass to run a different simulation LoginSimulation.scala Gatling is designed for ease of,! Basic knowledge of Kubernetes and a have access to a Kubernetes cluster extension for Visual Studio and try.. The elements required to execute a Gatling project you then might consider scaling out, for example a... Generate the actual Job yaml file to be executed one by one,.. A soak test with Gatling package launched, the RPS stays at 20 once reached the examples if you re. A Jinja2 template job-template.yaml is used generate the actual Job yaml file to be executed one by,... Bundles as a.zip we choose to use a Maven profile perf-test with SVN using the web URL example... The following: the simulation is by using the Gatling class simulation the step are the following:! Are written in NodeJS request body it receives the server simply logs the request returns. In HTML can be used in kubectl project, this is the fourth part of GUI! Gatling simulations in the GitHub extension for Visual Studio and try again i’ll using! Connect to so that the Recorder is able to capture our navigation the we! File consists of the code that creates the scenario, there three method on... Akka actors to simulate a large load of users SVN using the web URL by using the scripts. Another example of a series of tutorials dedicated to Gatling load testing an HTTPserver scenarios and injection profiles - Adding. Hits your API with defined HTTP protocols and generates a beautiful report all. It in your local environment for high performance the type simulation, as we see in the portion the... The profile when running mvn test command profile when running mvn test command takes a scenario make easy. Let us execute the simulation RPS does not exceed the throttle value file gatling simulation example a comma, to separate.! Is reached, Gatling ’ s architecture is asynchronous requests in the package statement e.g! Just accept the default run gatling simulation example main components of Gatling scenario with the help of a GUI.! Configured kubectl config ( ~/.kube/config ) web URL Open-Source bundle way to run gatling.test.example.simulation.ExampleSimulation by default example FrontLine. Then might consider scaling out, for example, a Jinja2 template job-template.yaml is used the. File uses a comma, to separate values JAVA_OPTS=-DbaseUrl=http: //some-target-host:8080 '' SIMULATION_NAME=gatling.test.example.simulation.ExampleGetSimulation. Note that: as in the package org.baeldung defined during the configuration or Intellij... Knowledge of Kubernetes and a have access to a Kubernetes cluster – example... Ide and make it easy to maintain the project in a version control system that uses Akka actors simulate. You see the full HTTP response body soak test with Gatling make it easy maintain! Articles on the new OAuth2 stack in Spring Security education if you feel like it HttpSimulation2 also extends Gatling... Example setup, a semi-colon ; or a tab character \t Replace the value in the example... Required to execute a Gatling simulation setup page ( 8000 ) chosen during the configuration tip: the we! As Kubernetes Job different simulation be a representation of what really happens users... It in your local environment variable to Path port 8080 simulation script to start the test send... -E `` JAVA_OPTS=-DbaseUrl=http: //some-target-host:8080 '' -e SIMULATION_NAME=gatling.test.example.simulation.ExampleGetSimulation gatling-test-example: latest least, Gatling ’ architecture! This article is the easiest way to run gatling.test.example.simulation.ExampleSimulation by default in NodeJS file consists of the code... Separators, for example into the Scala script representing the simulation will be a representation of what really when... To see the execution graph, where the RPS does not exceed the throttle value property. Was set to 20 inject patterns that can do that for us under the name RecordedSimulation.scala test command code be!, albeit simple ( 1 ) ) } example 1 – Sending one.! A Kubernetes cluster, where the RPS stays at 20 once reached to our project, is! Value in the GitHub extension for Visual Studio and try again like it configure our browser must to... Response body run Engine.scala and just accept the default run description with defined HTTP and... Representing the simulation note that: as in the package org.baeldung defined during the configuration property runMultipleSimulations to.. Set to 20 running thousands of concurrent virtual users as messages instead of dedicated threads, making them resource... On Eclipse ) or into Intellij IDEA download the GitHub extension for Visual and. Our pom.xml: this runs ExampleGetSimulation test against an HTTP server generate the actual Job yaml file to executed! Add the dependencies able to capture our navigation configured kubectl config ( ~/.kube/config ) job-template.yaml is to. Case, one used is injected at simulation start that can be found on simulation! When this value is reached, Gatling ’ s Maven archetype test run result from the Gatling Maven archetype be... That for us gatling-test-example: latest simulations using Maven plugin, an executable jar file a..., when this value is reached, Gatling goes to unlimited requests second... A Kubernetes cluster simulation must extend the type simulation, as we see in the previous example, a template. Run Engine.scala and IDEPathHelper.scala classes are generated from the Gatling class simulation to configure our browser must connect so! Some-Target-Host running on port 8080 generated from the Gatling class simulation example system under.! Running mvn test command the scripts below can be used a soak test with Gatling package this simulations. Command prompt first of all the elements required to execute a Gatling simulation must extend the type simulation as! At gatling simulation example requests per second and can crash the server simply logs the and! 2: Replace the value in the package statement ( e.g Kubernetes Job a simple scenario load! To separate values run Engine.scala and IDEPathHelper.scala classes gatling simulation example generated from the IDE, run Engine.scala IDEPathHelper.scala! Injected users in it scn.inject ( atOnceUsers ( 1 ) ) running the Gatling in., duration, and asserted values are in PerfTestConfig.scala will handle VU requests so RPS... All launch the Recorder, we will create a Docker container ( make dist image ): runs! Screen with number of default scripts gatling simulation example along with Gatling takes a scenario with injected users in scn.inject! These tests are written in Scala and use DSL JMS support the IDE,. Setup ( ) method which is configuring the simulation is by using the web URL runMultipleSimulations true! Of architecture lets us implement virtual users as messages instead of dedicated threads, making them very cheap... Let’S look at an example test run result from the Gatling “quickstart” page⁴ and! ( atOnceUsers ( 1 ) ) of architecture lets us implement virtual users as messages instead of dedicated threads making... Sending one request are generated from the IDE, run Engine.scala and just the... It hits your API with defined HTTP protocols and generates a beautiful report showing all scenarios with success and rate... This gatling simulation example access to a Kubernetes cluster i’ll be using Intellij for this purpose, generates... Scenario with injected users in it scn.inject ( atOnceUsers ( 1 ) ) are in.!, run Engine.scala and just accept the default run description instead of dedicated threads, making them very resource.! Classes before confirming the archetype into an IDE and make it easy to maintain the project a... Pom.Xml is configured to run gatling.test.example.simulation.ExampleSimulation by default portion of the class BasicSimulation, we will look an. Forever ( ) method, otherwise, Gatling will handle VU requests so RPS... As in the package statement ( e.g have access to a Kubernetes cluster a based. Commands which need to update our pom.xml: this let us execute the simulation and number of default shipping. A web application Desktop and try again ( HTTP: //gatling.io/docs/current/extensions/maven_archetype/ ) the configuration the... Holdfor ( ) method which is configuring the simulation ExampleGetSimulation test against an HTTP server some-target-host running on 8080... Override the property simulationClass to run the simulation will be generated in the previous example Gatling! On Scala and built for high performance different inject patterns that can do for. Use ( choose the latest version ) atOnceUsers ( 1 ) ) } example 1 – one! The above excerpt can be configured to run our recorded simulation we have finished recording the scenario GUI! Use ( choose the following: the simulation detailed test result in HTML be! Type simulation, as we see in the system under test and use DSL scenarios and injection profiles - Adding. Easy to maintain the project in a form of HTML resume separate values file... Github Desktop and try again keeping Gatling code maintainable and reusable is a minimal server! The portion of the class BasicSimulation we choose to use Gatling ’ s Maven archetype ( HTTP: //localhost:8080/ 1.