This document provides an overview and introduction to Jenkins, an open-source automation server for continuous integration. It discusses what continuous integration is, best practices for CI, how Jenkins works and its features. Key points include that Jenkins allows automating the build, test and deployment process, has a large plugin ecosystem, and can be used to build projects in many languages beyond Java. The document also demonstrates how to set up and use basic Jenkins functionality.

1. Jenkins CI
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2. Continuous Integration is a software
development practice where members of a
team integrate their work frequently,
usually each person integrates at least
daily – leading to multiple integrations per
day.
-- Martin Fowler

3. Why CI?
Rapid Feedback
Reduced Risk
Collective Ownership
Continuous Deployment
Offload from people

4. Best Practices of CI
Single Source Repository
Commit often
Make Your Build Self-Testing
Automate the Build
Build fast

5. Jenkins
Extensible continuous integration
server

6. What is Jenkins?
Open-source CI server
Easy to install and use
Extensibility
Over 330+ plugins (230+ last year)
More than 20,000 installations

7. Why Jenkins?
GUI to manage
Strong community and eco-system
Distributed builds
Open Source and Free!

8. Lots of people are using Jenkins...
from Koshuke's slide: Continuous Integration in the Cloud with Hudson, JavaOne 2009

9. Including Yahoo ;-)

10. CI Tools survey in 2009
http://www.wakaleo.com/resources/polls

11. CI Tools survey in 2010
http://www.wakaleo.com/resources/polls

12. Another CI Tools Survey in 2010

13. Jenkins is still growing...

14. And the Job Trend is increasing

15. Basic Features
Notice a change
Check out source code
Execute builds/tests
Record and publish results
Notify developers

16. CI Overview
from Continuous integration with Hudson

17. Notice a change
Build Periodically
Depend on other projects
Poll SCM
Subversion Push vs. Pull

18. Check out source code
Subversion
CVS
Git
Mercurial
Perforce

19. Execute builds/tests
Java
Ant, Maven, Gradle
.Net
MSBuild, PowerShell
Shell Script
Python, Ruby, Groovy

20. Record and publish results
JUnit
TestNG
Findbugs
Cobertura
Checkstyle
PMD

21. Job Status
Job State: Job Stability:

22. Findbugs Integration

23. Cobertura Integration

24. Project Relationship

25. Notify developers
Twitter
email
RSS
IM
IDE
Android/iPhone
Firefox

27. Twitter

28. Jenkins on Eclipse
Update Site: http://code.google.com/p/hudson-eclipse/

29. Jenkins on Android
Android Market
Jenkins Wiki

30. eXtreme Feedback Panel plugin

31. Jenkins Sound plugin
http://wiki.jenkins-ci.org/display/JENKINS/Jenkins+Sounds+plugin

32. DEMO

33. Installation&Upgrade
Download Tomcat 6
Download jenkins.war
Put jenkins.war under webapps
Start Tomcat

34. Create a Job

35. Configure a Job

36. Configure Jenkins

37. Manage Plugins

38. Going Distributed
Need Isolation
Need Different environments
One Computer is not enough

39. Add Slave using JNLP
Java Web Start on slave initiates the session
Jenkins sends JNLP file and jar files
A separate socket connection is made

40. Add Slave using sshd
Master talks to sshd on a slave
Send slave.jar and “java -jar slave.jar”
SSH session becomes bi-di byte stream

41. Some Distributed Issues
Different OS/Environment
Install required tools
System administration
Need to install slave manually
Tied Jobs to Slaves

42. Monitor Slaves
Monitor key metrics
Low disck space and swap
Clock out of sync
Put offline automatically

43. from Koshuke's slide: Continuous Integration in the Cloud with Hudson, JavaOne 2009

44. from Koshuke's slide: Continuous Integration in the Cloud with Hudson, JavaOne 2009

45. Labels to Rescue

46. More on Label
Don't tied job to Slave, tied to Label
Label is a group of slaves
Support boolean expressions since 1.372
windows&&IE
FF||Chrome
!windows
Can be used with Matrix Project

47. Matrix project
Need to run in multiple environments
Different JDK
Different OS
Different Browser
Axis could be:
Slave
User defined
Combination Filter
!(OS=="linux" && browser=="IE")
Touchstone builds
Sanity check

48. Create Matrix Project

49. Configuration

50. Results

51. DEMO

52. Jenkins on Cloud
Jenkins EC2 plugin
CloudBees
8.5 cents/hour of EC2 vs 1 cent/minute of CB

53. Jenkins EC2 plugin
AWS Account Information

54. Jenkins EC2 plugin
And which AMI you want to start

55. CloudBees' Jenkins as a Service

56. Miscellaneous
Integrate with Repository Browser
Monitor an external job
Jenkins for non-Java Projects

57. Tracking Changes

58. Integration with Sventon

59. Monitor an External Job
Hudson Wiki - Monitor an External Job

60. Jenkins for non-Java Projects
Python
PHP
Ruby
.Net

62. Jenkins: http://jenkins-ci.org/
Mailing List: http://groups.google.com/group/jenkinsci-
users?lnk=srg
Wiki: http://wiki.jenkins-ci.org/
Follow @jenkinsci on Twitter
"TS-5301 Continuous Integration in the Cloud with
Hudson" by Koshuke
Hudson Wiki - Distributed builds
Label and Matrix Project Enhancements
Continous Integration by Martin Fowler
Continuous Integration with Hudson - the book
Continuous Integration with Hudson on JavaWorld

63. haocheng.lee@gmail.com
follow @haocheng on Twitter