Lessons from Jenkins Platform Support
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Jenkins World 2019 lightning talk presented by Mark Waite, Aug 14, 2019 in San Francisco. Describes challenges, accomplishments, and lessons learned while adding Java 11 support to Jenkins
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Lessons from Jenkins Platform Support
- 1. Lessons from Platform Support Adapting and Adopting
- 2. Lessons from Platform Support Adapting and AdoptingLightning Talk
- 3. © 2019 All Rights Reserved. 3 Lessons from Platform Support Adapting and Adopting • Java 11 • Windows • Docker
- 4. © 2019 All Rights Reserved. 4 What is Jenkins? • Most popular CI/CD tool in the world • More than 250 000 active installations • Open source • Huge plugin ecosystem (1500+ plugins)
- 5. © 2019 All Rights Reserved. 5 Jenkins Under the Hood • Java • XML • Groovy • Jetty • …
- 6. © 2019 All Rights Reserved. 6 Begin the Race – Sep 2017 – May 2018 • Initial experiments • Build projects that require Java 9+ • Jenkins won’t run with Java 9 • Pipeline won’t run • Freestyle projects glitches • Process management broken • Maven project type not supported
- 7. © 2019 All Rights Reserved. 7 Worldwide Hackathon – June 2018 • 26 contributors • Pipeline is working! • Core and plugin patches submitted • Development tools working • Exploratory testing
- 8. © 2019 All Rights Reserved. 8 Java 11 Preview in Jenkins 2.155 – December 2018 • Weekly release with Java 11 support • Most crucial plugins running and testing • Build infrastructure tests Java 8 and Java 11, plugins and core • On the road to long term support release!
- 9. © 2019 All Rights Reserved. 9 Java 11 support in Jenkins 2.164 LTS – March 2019 • Long term support release with Java 11 support • Many more plugins running and testing • Ready for production use
- 10. © 2019 All Rights Reserved. 10 Jenkins One of the largest JVM-based projects • Automation Framework (too flexible) • 1500+ plugins • 10+ years of compatibility • 1500+ plugins • Distributed remote execution • Many, many dependencies
- 11. © 2019 All Rights Reserved. 11 Java 11 Dependency Updates • Many, many dependencies • ASM • Jetty • Groovy • JBoss Marshalling • JNR, JNA
- 12. © 2019 All Rights Reserved. 12 Java 9+ - No Longer Visible in Default Classloader • XML – JAXB • SQL • Annotations - javax • Activation – javax • RMI – javax • Tools – javax • CORBA • Several of these are widely used • Alternatives explored with OpenJDK
- 13. © 2019 All Rights Reserved. 13 No more Java Web Start – Handling Windows Agents & more • Agent startup from the web user interface
- 14. © 2019 All Rights Reserved. 14 Tool Upgrades for Java 11 • Latest maven releases • Plugin and core parent POM’s • Pipeline (Jenkinsfile) to build plugins • Java 8 & Java 11 • Linux & Windows • Jenkins Test Harness • Acceptance Test Harness • Plugin Compatibility Tester • Replace findbugs with spotbugs • Repair Javadoc for Java 11 • Update docker images for Java 11
- 15. © 2019 All Rights Reserved. 15 Windows Installer and Build Improvements • Alex Earl (“slide”) efforts • Remove 32 bit Java from installer • Code signing on new installer • Chocolatey package
- 16. © 2019 All Rights Reserved. 16 Platform skills?– Join the Platform SIG • Platform SIG needs • Java Developers • Testers • Writers • Users – Windows, Linux, FreeBSD, OpenBSD, zOS, zLinux, ARM, etc. • https://jenkins.io/sigs/platform