Presentation for 2014 Selenium Camp In Kiev Link to audio of the presentation http://www.youtube.com/watch?v=OrtR_k1biOg&feature=youtu.be

1. Managing Large Selenium Grid
Dima Kovalenko (@dimacus)
Jack Calzaretta

3. http://seleniumcamp.com

9. VMs

12. www.xenproject.org

13. Open Source
• GNU License
• Free

14. Fast
• Lightweight
• Windows restarts in 5 seconds
• 8 Windows 7 VMs on 1 host

17. Stable
• 1.5 years with 0 maintenance

18. Controls
• Complete control from linux shell

20. Controls
• Complete control from linux shell
• Making new VMs by copy/paste
• Windows info stored in text file
• Can use any VCS to store configs

21. Example Config

25. Network
• Bridge network
• Easy network setup

26. GUI Access
• VNC
• Each Windows instance listens on different
port

28. Disadvantages
• Need some linux experience
• No GUI
• Does not have as many features as VMWare
• A lot of initial work

29. Proxy

30. Problem
• Many computers
• Many datacenters
• A lot of firewalls

36. Reverse tunnel
• SauceConnect

38. Reverse tunnel
• SauceConnect
• Slow

40. Reverse tunnel
• SauceConnect
• Slow
• Can be Unstable
• Machine to port nightmare

41. Proxy Tunnels

42. Browser Proxy Settings
• Set Browser to use 1 port
• Set white list of reachable assets

45. JVM
• -Dhttp.proxyHost=
• -Dhttp.proxyPort=
• Java -Dhttp.proxyHost=123 -
Dhttp.proxyPort=123 –jar selenium.jar –role
hub

47. GridExtras
• https://github.com/groupon/Selenium-Grid-
Extras

48. Goal
• Stabilize OS in Grid
• Give control over grid nodes

50. Tie Into Hub
• DefaultProxy class
• Pre/After Session hook

52. Status Servlet
• Added new servlet for node status
• Json return

54. Features
• Turn on/off IE Protected mode
• Update Webdriver
• Update Chrome Driver
• Update IEDriver
• Kill Any Browser
• Check any OS Port
• Kill anything on a given port
• Reboot OS
• Take OS Screenshot
• Etc..

55. Help Us out
• Java
• Very friendly
• https://github.com/groupon/Selenium-Grid-
Extras

56. Thank you
• Dima Kovalenko
• @dimacus