Scaling and Managing Selenium Grid
- 1. Scaling and Managing Selenium Grid Dima Kovalenko @dimacus
- 2. • Note to self, this slide should be completely blank, NO TEXT of any sort!
- 4. Shameless Plug ISBN: 9781783982707 https://www.packtpub.com/web-development/selenium-design-patterns-and-best-practices
- 6. Explaining Grid • Dumb Nodes
- 7. Explaining Grid • Dumb Nodes • Even Dumber Hub
- 8. Hub is a Glorified Proxy Server • HUB is an HTTP Proxy • That tracks node count – Does not know much else about nodes
- 9. Getting Priorities Right • Stability • Speed • Coverage
- 10. Stability • Become a Sys Admin
- 11. Stability • Become a Sys Admin • Move as much to Linux as possible
- 12. Stability • Become a Sys Admin • Move as much to Linux as possible • Only 1 test at the time! - At least for IE Safari
- 13. Stability • Become a Sys Admin • Move as much to Linux as possible • Only 1 test at the time! - Shared resources at OS level
- 14. Stability • Become a Sys Admin • Move as much to Linux as possible • Only 1 test at the time! • Configuration as code – Git – Chef – Puppet
- 15. Configuration Management • Node Configs – Grid Hub Configs – Grid Node Configs – Store In Git
- 16. Configuration Management • Node Configs – Grid Hub Configs – Grid Node Configs – Store In Git • OS Configs – Crons – Versions • Browsers • Java • Etc..
- 17. Speed • Smaller Nodes – Better to have 10 computers with 1 browser • It’s ok to use low end machines
- 18. Speed • Smaller Nodes – Better to have 10 computers with 1 browser • It’s ok to use low end machines – Take performance hit in place of faster run time
- 19. Coverage • Can we add IE6 and 7 to the Grid?
- 20. Coverage
- 21. Coverage • More maintenance • IE8 takes 50% of free time • IE9 or > is much Safer to use
- 22. International Buy Jim Evans a BEER day!
- 23. International Buy Jim Evans a BEER day!
- 25. International Buy Jim Evans a BEER day!
- 27. More On Stability • Don’t Use RC – java -jar selenium.jar -role node
- 28. More On Stability • Don’t Use RC • Use WebDriver –java -jar selenium.jar -role wd
- 29. More On Stability • Replace Internet Explorer with Batch file • Create Crons (Scheduled Tasks) – Periodically Restart Grid node (JAR) – Periodically Restart Computer
- 30. More On Stability • Replace Internet Explorer with Batch file – Cleans up Cookies, Cache, etc – Launches Internet Explorere
- 31. More On Stability • Replace Internet Explorer with Batch file • Create Crons (Scheduled Tasks) • Auto login & Auto Start at login – Always auto login with the Build User
- 32. More On Stability • Replace Internet Explorer with Batch file • Create Crons (Scheduled Tasks) • Auto login & Auto Start at login • Etc.. Etc.. Etc..
- 33. Selenium Grid Extras • 1 year old
- 34. Selenium Grid Extras • https://github.com/groupon/Selenium-Grid- Extras
- 35. Goal of the Project • Document Grid Stability with code
- 36. Goal of the Project • Document Grid Stability with code – (Poorly written Java code that is) • Make the setup and maintenance of the grid simple
- 37. Features to improve stability • Automatically Set IE Protected Security Zone each reboot • Move the mouse out of the way • Kill web browser after Test • Kill chromedriver.exe and iedriver.exe after build • Automatically update Drivers and JARS • Store config for all nodes in single place
- 38. Latest Features • Restart node every X builds, when node is free • Jenkins Plugin • Video recording of test (Work in progress)
- 39. Optionally Reboot OS • Windows reboot not optional! • Improves speed and test stability • Prevents this:
- 41. Video Recording • (Work in Progress)
- 42. Demo
- 43. Jenkins Plugin • (Work in Progress)
- 45. Find IE Crashes at a Glance
- 46. Questions?