QA/Execution/Web Testing/Automation/Selenium Grid

From MozillaWiki
Jump to navigation Jump to search

moz-grid-config

moz-grid-config is a project for managing our Selenium infrastructure. It includes the latest version of Selenium that we're using, and a mechanism for starting the hub/nodes. You can find documentation on moz-grid-config at the github project page.

Selenium Grid Hub

The Selenium Grid hub is running on a VM in our data-center. For setup and administration see our internal documentation. We also have a staging instance documented here.

Selenium Grid Nodes

We have several Mac minis running as Selenium nodes VMs running Windows nodes in our data-center.

Mac OS X Nodes

  • selenium.qa.mtv2.mozilla.com (10.252.73.143)
    • Mac OS X 10.10.4, 2.7 Ghz Intel Core i7; 8 GB
  • selenium-5.qa.mtv2.mozilla.com (10.252.73.145)
    • Mac OS X 10.10.4, 2.66 GHz Intel Core 2 Duo; 8GB 1067 MHz DDR3
  • selenium-7.qa.mtv2.mozilla.com (10.252.73.9)
    • Mac OS X 10.10.4, 2.5 GHz Intel Core i5; 4GB 1067 MHz DDR3

Windows Nodes

  • selenium1.qa.scl3.mozilla.com (10.22.73.149)
    • Windows 7, 8 GB RAM, 2 cores, 150GB disk
  • selenium2.qa.scl3.mozilla.com (10.22.73.150)
    • Windows 7, 8 GB RAM, 2 cores, 150GB disk
  • selenium3.qa.scl3.mozilla.com (10.22.73.151)
    • Windows 7, 8 GB RAM, 2 cores, 150GB disk
  • selenium4.qa.scl3.mozilla.com (10.22.73.152)
    • Windows 7, 8 GB RAM, 2 cores, 150GB disk
  • selenium5.qa.scl3.mozilla.com (10.22.73.153)
    • Windows 7, 8 GB RAM, 2 cores, 150GB disk
  • selenium6.qa.scl3.mozilla.com (10.22.73.154)
    • Windows 7, 8 GB RAM, 2 cores, 150GB disk
  • selenium-staging1.qa.scl3.mozilla.com (10.22.73.138)
    • Windows 7, 8 GB RAM, 2 cores, 150GB disk

Starting Mac OS X Nodes

Connect to the appropriate machine, and execute the following from a terminal (you can use SSH or VNC): 

   cd ~/moz-grid-config
   ant -Denv=production

The -Denv value can be either production or staging, and controls which Selenium hub the node connects to. Omitting this, or any other value will assume the hub is running on localhost.

Starting Windows Nodes

We use the msysgit tool on Windows. Connect to the appropriate machine using Remote Desktop, start the MsysGit tool on the desktop, and run the following commands: 

   cd ~/moz-grid-config
   ant -autoproxy -Denv=production

We need the -autoproxy helper because the these nodes run through a proxy.

The -Denv value can be either production or staging, and controls which Selenium hub the node connects to. Omitting this, or any other value will assume the hub is running on localhost.

Stopping Nodes

Terminate the process using Ctrl+C.

Adding a Browser

Configuration

You will need to fork and clone from the moz-grid-config github repository and work on a new branch.

  1. Add the browser, alias, and path to grid_configuration.yml.
  2. Add the browser, binary and details to the JSON configuration files.
  3. Submit a pull request to the main GitHub repository from your branch.

Hub/Nodes

  1. Prepare Jenkins for shutdown - this will allow all currently running jobs to finish, but will not start any new jobs.
  2. Once no jobs are running, stop the Selenium Grid hub
  3. Pull in the latest changes from moz-grid-config
  4. Start the Selenium Grid hub
  5. For each node:
    1. Stop the Selenium server
    2. Pull in the latest changes from moz-grid-config
    3. Install the appropriate browser
    4. Start the Selenium server

Installing Firefox

  • All new browsers should be installed with the version number in the path so that moz-grid-config can always find them.
  • Install mozdownload and mozinstall using pip to download and install the Firefox binaries.
    • Use --help for both mozdownload and mozinstall to see all available options
    • To download the latest release using mozdownload you can simply use: mozdownload -v latest
    • To download the latest Firefox Nightly build using mozdownload you can use: mozdownload -t daily --branch=mozilla-central
    • To download the latest Firefox Aurora build using mozdownload you can use: mozdownload -t daily --branch=mozilla-aurora
    • Releases are also available to download manually here

Mac OS X

From a terminal: 

   mozdownload -v 37.0 -d firefox.dmg
   mozinstall -d /tmp firefox.dmg
   mv /tmp/Firefox.app/ "/Applications/Firefox 37.app/"
   rm firefox.dmg

Windows

From a command prompt: 

   mozdownload -v 37.0 -p win32 -d firefox.exe
   mozinstall -d %TMP% firefox.exe
   move %TMP%/firefox "\Program Files (x86)\Mozilla Firefox 37"
   del firefox.exe

Setting hostname on Mac OS X

Shamelessly copied from http://budporter.net/?p=47

If you are running a version of OSX prior to 10.5, then look in /etc/hostconfig for the HOSTNAME= parameter and set it to be the FQDN (Fully Qualified Domain Name) that you want to use. So, for host foo located in the domain bar.com, the entry would be as follows: 

   HOSTNAME=foo.bar.com

For OSX 10.5, /etc/hostconfig is being deprecated. There are a couple of preferred methods to do this in 10.5: 

   sudo hostname -s foo.bar.com

or: 

   sudo scutil –set HostName foo.bar.com

You can verify the change by issuing the following command: 

   hostname

The output will display the FQDN of the computer.

Updating Selenium

Follow these steps to upgrade the version of Selenium.

Update staging instance

  • If you're not on a Mozilla office network, connect to the Mozilla VPN
  • Login to Jenkins
  • Prepare Jenkins for shutdown
  • Wait until no jobs are running
  • Connect to selenium-staging1.qa.scl3.mozilla.com using RDP
  • Stop the Selenium node by hitting Ctrl+C in the terminal window
  • Update the Selenium major and minor versions in C:\Users\mozauto\moz-grid-config\default.properties
  • Start the Selenium server by running ant -autoproxy -Denv=staging -Dnode.host=IP
  • Connect to selenium-5.qa.mtv2.mozilla.com using VNC
  • Stop the Selenium node by hitting Ctrl+C in the terminal window
  • Update the Selenium version in /Users/webqa/moz-grid-config/default.properties
  • Start the Selenium server by running ant -Denv=staging
  • Connect to selenium-hub-staging1.qa.scl3.mozilla.com using SSH
  • Stop the Selenium hub by running sudo initctl stop selenium
  • Update the Selenium version in /etc/init/selenium.conf
  • Start the Selenium hub by running sudo initctl start selenium
  • Cancel the Jenkins shutdown
  • Verify the hub and node versions on the Selenium hub console

Testing staging instance

Update moz-grid-config

Update production instance

  • Login to Jenkins
  • Prepare Jenkins for shutdown
  • Wait until no jobs are running
  • Connect to selenium1.qa.scl3.mozilla.com using RDP
  • Stop the Selenium node by hitting Ctrl+C in the terminal window
  • Pull down the latest moz-grid-config changes by running git pull
  • Start the Selenium server by running ant -autoproxy -Denv=production
  • Repeat for selenium2, selenium3, selenium4, selenium5, and selenium6
  • Connect to selenium.qa.mtv2.mozilla.com using VNC
  • Stop the Selenium node by hitting Ctrl+C in the terminal window
  • Pull down the latest moz-grid-config changes by running git pull
  • Start the Selenium server by running ant -Denv=production
  • Connect to selenium-hub1.qa.scl3.mozilla.com using SSH
  • Stop the Selenium hub by running sudo initctl stop selenium
  • Update the Selenium version in /etc/init/selenium.conf
  • Start the Selenium hub by running sudo initctl start selenium
  • Cancel the Jenkins shutdown
  • Verify the hub and node versions on the Selenium hub console
Retrieved from "https://wiki.allizom.org/index.php?title=QA/Execution/Web_Testing/Automation/Selenium_Grid&oldid=1088377"