Continuous Integration: Importance, Use Cases, Toolbox, Scenerios

1. Continuous Integration
Barış İNANÇ
ARDIC AR-GE
Release Engineer

2. Who am I?
• Release Engineer in ARDIC INC.
• Maintaining build operations for 3 years
• Trying to automate everything
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3. Agenda
• Catastrophic Failure Step by Step
• Continuous Integration
• Why it is important?
• What is needed?
• Build
▫ What
▫ When
▫ How
• My Toolbox and Workflow
• 7 Step for Success
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4. Catastrophic Failure Step by Step
• Crowded Team
• Multi module project
• No revision management system / wrong usage
of revision management system
• Manual testing
• Compile only on finish
• Binary deployment from developer computer
• …
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5. Continuous Integration
• Software engineering practice, where project is
builded frequently
• Emerged as Extreme Programming technique
• 2000, Continuous Integration, Martin Fowler
• Became Agile Process standard
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6. Why it is important? (1)
• Fixing bugs late can be costly
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7. Why it is important? (2)
• To Improve Team Collaboration
▫ “Changes are conflicting how to merge now?”
▫ “When did this code changed/removed/added”
▫ “It was working two days ago”
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8. Why it is important? (3)
• To Improve Code Quality
(Before production/catastrophic failure)
▫ “Same code over and over why not make a
function”
▫ Why did you write this code:
…
if(foo==true)
return true
else
return false
…
return foo
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9. Why it is important? (4)
• To know Project history/future
▫ What was in version 1.2.129?
▫ Which tests are failing?
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10. Why it is important? (5)
• Always ready for deployment
▫ “It works on my computer”
▫ “Customer is coming, ready for a demo?”
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11. Fix before not try during flight
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12. What is needed?
• Revision Management System (GIT/SVN)
• Dedicated Build Server
• Open-minded team
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13. Term: Build
• Learn real meaning of Build
Build != Compile
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14. Build
• Compilation
sucessfully
• Test Execution
• Database Integration
• Code Inspection
• Automated Deployment
• Document Generation
repeatable
Upgrade/downgrade scripts
Health check
Always ready
Up-to-date
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15. Build When?
• Full project build regularly (nightly)
• Build module in every commit
• Full Build if a module changes dependencies
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16. Build How?
• Generate building scripts
• Unattended building
• Do not use IDE for building
• Use CI server not developer computer
• Generate build report for immediate feedback
• Accessible for team
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17. Jenkins CI
• Easy to use Continuous Integration tool
• Building/Testing/Monitoring can be done from
same application
• Ready for scaling and parallel building
• Can integrate with SCM and Code Quality tools
easily
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18. 18

19. Gerrit Code Review
• Code Review system for GIT SCM
• Each patchset can be reviewed before merging to
release branch
• Fix before build
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20. 20

21. SonarQube
• Code Quality tool
• Automated code quality analysis
• Over 20 programming languages
• Coding rules, potential bugs, duplications can be
anlyzed via this tool
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23. Let’s integrate Everything
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Submit changes
Submit changes it is applicable
Get changes and build
Analyze changes
GIT
Repo
Report Output

24. Let’s integrate Everything
• Never commit a code to master repository directly
• Send patchset to review regularly
• Patchset will be automatically builded and sent to
analysis to SonarQube
• SonarQube runs analysis and generated report
• Build and Analysis reports will be linked to
patchset in Gerrit Code Review system
• Merge code to release branch after manual review
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25. Let’s integrate Everything
• Jenkins CI can build project regularly
• After compilation completed tests can be run via
Jenkins
• Daily sonar analysis can be started during this
build
• All reports will be ready for the morning
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26. 26
Source: http://www.slideshare.net/drluckyspin/continuous-integration

27. Conclusion
• For
▫ Better quality Code
▫ Fast Development Time
▫ Less cost on money or time
• Use Continuous Integration techniques
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28. Thank you for listening
Any Questions…
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29. References
• http://www.slideshare.net/drluckyspin/continuous-integration
• https://wiki.jenkins-ci.org/display/JENKINS/Meet+Jenkins
• http://www.sonarqube.org/
• https://code.google.com/p/gerrit/
• http://martinfowler.com/articles/continuousIntegration.html
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