Selenium Meetup Kickof Fyber AWS EC2 AutoScaling Selenium GRID

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  1. 1. 1 Subline HEADLINE whoami? How we use Selenium Selenium as a Service (Saucelabs / BrowserStack / ) Building your own Selenium GRID on AWS EC2 Selenium Meetup What are we gonna talk about?
  2. 2. WHOAMI Harry Urban 2 QA Lead@HarrysIdeAS
  4. 4. USE CASES Selenium GRID 4 DesktopPage MobileResponsive SingleSignOn PaymentWorkflows
  5. 5. CUCUMBER BDD with Gerkhin 5
  6. 6. 6 CUCUMBER Step Implementation
  7. 7. CUCUMBER Page Objects (e.g. with Fluentlenium) 7
  8. 8. FROM LOCALHOST TO CLOUD First steps - Localhost 8 chief cook and bottle washer server (eierlegende Wollmilchsau Server) Jenkins for Test Execution Tomcat (webapp) for collecting and presenting test results Firefox instances as many as Jenkins Executors Selenium Standalone -> Left-over Firefox Instances -> Full Hard Drives -> Other Services not being able to run -> Resource Conflicts Either everything works or nothing
  9. 9. 9 HEADLINE Subline FROM LOCALHOST TO CLOUD First steps - Saucelabs Account at Saucelabs - Firewall Exclusions for Tests on Staging Systems wide ip range with changes every couple of months - Sometimes long response times -> failing tests + Throw-away Servers == no Re-Usage of VMs + Video Recordings of Sessions + No Stuck Browsers >1000$ / month
  10. 10. HEADLINE Subline 10 FROM LOCALHOST TO CLOUD First steps - BrowserStack Evaluation of BrowserStack - Hosting on AWS -> Wide AWS IP Range had to be whitelisted in Firewall for Stages -> Security / Privacy Issue - Re-Usage of VMs - A lot of False Positives - NO Video Recordings of Sessions - In the end more expensive than Saucelabs
  11. 11. 11 FROM LOCALHOST TO CLOUD Make or buy -> Best satisfaction with Saucelabs
  12. 12. HEADLINE Subline 12 FROM LOCALHOST TO CLOUD Chef Cookbooks for Infrastructure vagrant-aws + chef + selenium cookbook = GRID @ AWS
  14. 14. 14 HEADLINE Subline HEADLINE Subline FROM LOCALHOST TO CLOUD Setting up AWS Infrastructure
  15. 15. HEADLINE EC2 Instance Overview 15 FROM LOCALHOST TO CLOUD
  16. 16. 16 HEADLINE SublineAuto Scaling Group for Selenium Nodes FROM LOCALHOST TO CLOUD
  17. 17. HEADLINE Subline 17 Auto Scaling Group for Selenium Nodes FROM LOCALHOST TO CLOUD
  18. 18. HEADLINE Subline 18 CloudWatch - Custom Metrics FROM LOCALHOST TO CLOUD Upscaling Pushing Pending Requests with cron job from HUB -> increases Desired Size at AutoScalingGroup Downscaling AWS EC2 pay at least 1h Nodes check from 50 to 60min if they are idle if idle -> a) detach from Grid b) self destroy c) decrease Desired Size at ASGroup if they are not idle in that timespan they got to live for another 50-60min
  19. 19. HEADLINE Selenium Grid Console 19 FROM LOCALHOST TO CLOUD
  20. 20. 20 LIMITATIONS OF AWS Auto Scaling + AMIs Analytics showed that >50% of our users are on Windows -> right now 100% Windows Nodes unix nodes planed for DesiredCapability Platform=ANY Unix nodes are even easier, because they can be completely provisioned Challenges of Windows Nodes -> No easy provisioning with Chef so far manually configured Windows AMI, that evolved over time (not yet time invested in provisioning naked Windows, e.g. Windows Templates for Packer) AutoScalingGroups work with AMIs ASGroups are based on LaunchConfigurations in LCs you have to configure an AMI to launch -> no downside of Windows Nodes for our setup
  21. 21. 21 LEARNINGS Limitations of Webdriver and Selenium Keep requests to the DOM at a minimum e.g.: Dont iterate through an XML file with WD requests No matter what, always stop the Browser at the end of your test Clean temporary files often Have a TimeOut in your code for interrupting page loads being stuck
  22. 22. FUTURE CHALLENGES Testing Microservices 22 WELTN24 is going to make a big switch from a monolith to micro services: Advantage: Teams can deploy independently and more often Requirement: Fully automated deployment Limitations of GUI-Tests (End2End Tests): The higher you get in the testing pyramid the more flaky your tests get -> Flaky tests dont suit a fully automated deployment pipeline!? Challenge: Can GUI Tests tests be integrated in automated deployments? Proposal: Stable and smart Test Journeys through GUI for business critical paths combined with Contract Based Testing for ensuring functional behavior?
  23. 23. REFERENCES LINKS AND TOOLS 23 Worth a look at:
  24. 24. 24 THANK YOU STAY IN TOUCH Slides will be on: STAY IN TOUCH @HarrysIdeAS Harry Urban -> LinkedIn XING Questions?