Overview

In this tutorial, we will learn how to register a Selenium Grid Node with a custom configuration. We can customize the Node using a JSON configuration file. In the earlier post, we learned how to start Selenium Grid Hub with a JSON configuration file.

Grid Hub Configuration file

https://www.testingdocs.com/selenium-grid-hub-json-configuration/

Selenium Grid Node configuration file

Create a JSON file with node configuration. For example, create a file name called node.json Define the node configuration file in JSON format. We can register the node with the json configuration file. A sample node configuration file is shown below:

{
 "capabilities":
 [
 {
 "browserName": "firefox",
 "marionette": true,
 "maxInstances": 9,
 "seleniumProtocol": "WebDriver"
 },
 {
 "browserName": "chrome",
 "maxInstances": 9,
 "seleniumProtocol": "WebDriver"
 },
 {
 "browserName": "internet explorer",
 "platform": "WINDOWS",
 "maxInstances": 10,
 "seleniumProtocol": "WebDriver"
 },
 {
 "browserName": "safari",
 "technologyPreview": false,
 "platform": "MAC",
 "maxInstances": 1,
 "seleniumProtocol": "WebDriver"
 }
 ],
 "proxy": "org.openqa.grid.selenium.proxy.DefaultRemoteProxy",
 "maxSession": 30,
 "port": -1,
 "register": true,
 "registerCycle": 5000,
 "hub": "http://localhost:4444",
 "nodeStatusCheckTimeout": 5000,
 "nodePolling": 5000,
 "role": "node",
 "unregisterIfStillDownAfter": 60000,
 "downPollingLimit": 2,
 "debug": true,
 "servlets" : [],
 "withoutServlets": [],
 "custom": {}
}

Now, we can register the Node with custom JSON configuration file using the below command. The command line switch is -nodeConfig followed by the JSON configuration file name. This file should define the node properties and overrides the default values for the node.

\>java -jar <selenium-server-standalone-version.jar> -role node -nodeConfig node.json

JSON Configuration File