Setup Selenium Grid on RedHat

Install specific Firefox version for testing

Search Firefox install package by version from http://ftp.mozilla.org/pub/firefox/releases/. We suggest to install the latest version of Firefox.

Use Firefox v137.0.1 as example:

## Unlink previous version of Firefox
unlink /usr/bin/firefox

## Download Firefox installation package
wget http://ftp.mozilla.org/pub/firefox/releases/137.0.1/linux-x86_64/en-US/firefox-137.0.1.tar.xz

## Uncompress installation package to /usr/local/ folder
tar xvf firefox-137.0.1.tar.xz -C /usr/local/

## Create link for Firefox binary file
sudo ln -s /usr/local/firefox/firefox /usr/bin/firefox

## Firefox Dependency
yum install gtk3 -y
yum install alsa-lib -y

## Check Firefox version
firefox --version

Install specific Chrome version for testing

Search Chrome install package by version from https://googlechromelabs.github.io/chrome-for-testing/known-good-versions-with-downloads.json. We suggest to install the latest version of Chrome.

Use Chrome v134.0.6998.165 as example:

## Unlink previous version of Chrome
unlink /usr/bin/google-chrome

## Download Chrome installation package
wget https://storage.googleapis.com/chrome-for-testing-public/134.0.6998.165/linux64/chrome-linux64.zip

## Uncompress installation package to /usr/local/ folder
unzip chrome-linux64.zip -d /usr/local/

## Create link for Chrome binary file
sudo ln -s /usr/local/chrome-linux64/chrome /usr/bin/google-chrome

## Chrome Dependencies for Redhat 8.10
yum install at-spi2-atk -y
yum install mesa-libgbm -y
yum install alsa-lib -y

## Check Chrome version
google-chrome --version

## Test Chrome
google-chrome --headless --disable-gpu --dump-dom https://www.chromestatus.com/

Install Latest Chrome by RPM

## Download latest Chrome RPM installation package
wget https://dl.google.com/linux/direct/google-chrome-stable_current_x86_64.rpm

## Install Chrome by RPM
yum -y localinstall google-chrome-stable_current_x86_64.rpm

## Check Chrome version
google-chrome --version

## Test Chrome
google-chrome --headless --disable-gpu --dump-dom https://www.chromestatus.com/

Setup Selenium Grid Server

Create folder for Selenium Grid Server

We use /opt/selenium folder as an example, you can change it to any other folder.

mkdir -p /opt/selenium
mkdir -p /opt/selenium/conf
cd /opt/selenium

Download Selenium Grid Jar

Selenium Grid Server v3.141.59 Jar can be download from the link: https://github.com/SeleniumHQ/selenium/releases/download/selenium-3.141.59/selenium-server-standalone-3.141.59.jar

Please download the Jar file to the folder /opt/selenium.

Download Firefox and Chrome WebDrivers

The Firefox and Chrome driver version should align with the installed browser version.

For Firefox, you can download the latest firefox driver version from the link: https://github.com/mozilla/geckodriver/releases

Eg: Firefox geckodriver v0.36.0 download link: https://github.com/mozilla/geckodriver/releases/download/v0.36.0/geckodriver-v0.36.0-linux64.tar.gz

For Chrome, you can search the installed Chrome version in the JSON (https://googlechromelabs.github.io/chrome-for-testing/known-good-versions-with-downloads.json), then download the corresponding chrome driver version.

Eg: Chrome driver v134.0.6998.165 download link: https://storage.googleapis.com/chrome-for-testing-public/134.0.6998.165/linux64/chromedriver-linux64.zip

Please download and uncompress the webdriver files(the file names are geckodriver and chromedriver) to the folder /opt/selenium.

Configure Selenium Grid Scripts

SELENIUM_HOME=/opt/selenium

## Create hubconfig.json
cat > ${SELENIUM_HOME}/conf/hubconfig.json<< EOF
{
  "port": 4444,
  "newSessionWaitTimeout": 10000,
  "servlets" : [],
  "withoutServlets": [],
  "custom": {},
  "capabilityMatcher": "org.openqa.grid.internal.utils.DefaultCapabilityMatcher",
  "registry": "org.openqa.grid.internal.DefaultGridRegistry",
  "throwOnCapabilityNotPresent": true,
  "cleanUpCycle": 5000,
  "role": "hub",
  "debug": false,
  "browserTimeout": 60,
  "timeout": 60
}
EOF

## Create nodeconfig.json
cat > ${SELENIUM_HOME}/conf/nodeconfig.json<< EOF
{
  "capabilities":
  [
    {
      "browserName": "firefox",
      "marionette": true,
      "maxInstances": 5,
      "seleniumProtocol": "WebDriver"
    },
    {
      "browserName": "chrome",
      "maxInstances": 5,
      "seleniumProtocol": "WebDriver"
    }
  ],
  "proxy": "org.openqa.grid.selenium.proxy.DefaultRemoteProxy",
  "maxSession": 5,
  "port": -1,
  "register": true,
  "registerCycle": 5000,
  "hub": "http://localhost:4444",
  "nodeStatusCheckTimeout": 5000,
  "nodePolling": 5000,
  "role": "node",
  "unregisterIfStillDownAfter": 60000,
  "downPollingLimit": 2,
  "debug": false,
  "servlets" : [],
  "withoutServlets": [],
  "custom": {},
  "browserTimeout": 60,
  "timeout": 60
}
EOF

## Create start script
cat > ${SELENIUM_HOME}/start.sh<< EOF
#!/bin/bash
BASEDIR="\$( cd "\$(dirname "\$0")" ; pwd -P )"
mkdir -p \${BASEDIR}/logs
nohup java -jar \${BASEDIR}/selenium-server-standalone-3.141.59.jar -role hub -hubConfig \${BASEDIR}/conf/hubconfig.json > \${BASEDIR}/logs/hub.log 2>&1 &
nohup java -Dwebdriver.chrome.driver=\${BASEDIR}/chromedriver -Dwebdriver.gecko.driver=\${BASEDIR}/geckodriver -jar \${BASEDIR}/selenium-server-standalone-3.141.59.jar -role node -nodeConfig \${BASEDIR}/conf/nodeconfig.json > \${BASEDIR}/logs/node.log 2>&1 &
EOF

## Add execution permission for start script
chmod +x ${SELENIUM_HOME}/start.sh

## Create stop scropt
cat > ${SELENIUM_HOME}/stop.sh<< EOF
#!/bin/bash
kill -9 \$(ps -aux|grep hubconfig.json | grep -v grep| awk '{print \$2}')
kill -9 \$(ps -aux|grep nodeconfig.json| grep -v grep| awk '{print \$2}')
EOF

## Add execution permission for stop script
chmod +x ${SELENIUM_HOME}/stop.sh

Start/Stop Selenium Grid Server Hub and Node by shell script

## Start selenium
/opt/selenium/start.sh

## Stop selenium
/opt/selenium/stop.sh

Register Selenium Grid Server as System Service to enable to start on boot

## Create selenium system service configuration file
cat > /etc/systemd/system/selenium.service<< EOF
[Unit]
Description = Selenium Service
After = network.target

[Service]
ExecStart = /opt/selenium/start.sh
ExecStop = /opt/selenium/stop.sh
RemainAfterExit = yes
#Uncomment below rows to run service by specific user or group
#User=selenium
#Group=selenium

[Install]
WantedBy = multi-user.target
EOF

## Enable selenium system service
chmod a+x /etc/systemd/system/selenium.service
systemctl enable selenium
systemctl daemon-reload

Start/Stop Selenium Grid Server Hub and Node by System Service

## Start selenium system service
systemctl start selenium

## Stop selenium system service
systemctl stop selenium

The full example of the selenium server scripts

You can download the full example of the selenium server scripts from https://github.com/sdc-china/IDA-doc/releases/download/25.0.3/selenium-server-linux64-3.141.59.zip

Configure Selenium Grid on IDA and Enable Headless Mode

Firefox Selenium Grid Configuration

## Supports Firefox and Chrome
arguments:
- "--headless"
## Change windows size
- "window-size=1920,1080"

Chrome Selenium Grid Configuration

Please note that the argument –no-sandbox is added for Chrome, which allows running Chrome by the root user.

## Supports Firefox and Chrome
arguments:
- "--headless"
- "--no-sandbox"
## Change windows size
- "window-size=1920,1080"