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Getting out of the Job Jungle with Jenkins
The document discusses the evolution and implementation of Jenkins pipelines, emphasizing automation in continuous integration and delivery. It introduces the Job DSL plugin for defining jobs and highlights issues related to code duplication across different projects and branches. The content also covers the use of pipeline libraries and properties for scaling automation while maintaining security and extensibility.
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Getting out of the Job Jungle with Jenkins
- 1. GETTING OUT OFTHE JOB JUNGLE @DamienCoraboeuf
- 2. WHO AM I? ▸Damien Coraboeuf (@DamienCoraboeuf) ▸ Born to Java in 1996 ▸ Working in Continuous Delivery since 2008 ▸ Automating pipelines @ FIS I’ll be your guide on this journey
- 3. THE MAP Shortintroduction to Jenkins Birth of a pipeline Manual mode The Job DSL Branching and its consequences Pipeline as code Pipeline as not code Automation of automation We want to get there Look, there is another beach here! Do not go there! 💀 There are traps here! 💀
- 4. DO YOU KNOWWHO THIS IS?
- 5. JENKINS ▸ http://jenkins-ci.org/ ▸ Veryversatile Continuous Integration engine ▸ ~ 70% of the CI market (2012 figures) ▸ Open source - strong community ▸ Extensible ▸ more than 1000 plugins ▸ easy to develop new ones ▸ Integrates with basically everything ▸ Job scheduler
- 6. JENKINS - JOBS& FOLDERS
- 7. JENKINS - JOBCONFIGURATION Let’s get some sources… Let’s run some build… Let’s trigger another job…
- 8. PIPELINES ▸ Defining jobs ▸Linking them together ▸ Running them in parallel or in sequence ▸ Some triggers are automatic, other ones are manual BUILD DEPLOY ENV 1 DEPLOY ENV 2 DEPLOY ENV 3 PUBLICATION RELEASE
- 9. A PIPELINE ISBORN BUILD DEPLOY ENV 1 DEPLOY ENV 2 DEPLOY ENV 3 PUBLICATION RELEASE BUILD DEPLOY ENV 1 DEPLOY ENV 2 DEPLOY ENV 3 PUBLICATION RELEASE BUILD DEPLOY ENV 1 DEPLOY ENV 2 DEPLOY ENV 3 PUBLICATION RELEASE Commit 1 Commit 2 Commit 3
- 10. SO FAR SOGOOD “Look Ma, I’ve built a pipeline!” “Lovely. Now, build one for your sister.”
- 11. THE STORY Product A ProductB Project C Maintenance 11.8 Maintenance 11.9 Maintenance 11.10 Maintenance 7.2 Maintenance 8.0 Maintenance 5.0 Check Publication WAS JBoss … Promotion for QA QAWAS QAJBoss … Promotion for NFT Sonar Fortify Perf Promotion for delivery Delivery Auto Manual Pipeline Products & Projects Branches …
- 12. THE STORY Jenkins team >5000 jobs and growing…
- 14. In order toscale, we want: ✔ Self service ✔ Security ✔ Simplicity ✔ Extensibility
- 15. “What are we?” “Developers!” “Whatdo we do?” “Code!” “Why do we do it?” “Automation!”
- 16. JOB DSL PLUGIN- START OF THE JOURNEY OUT OF THE JUNGLE ▸ Define a job using a Groovy based DSL!
- 17. JOB DSL PLUGIN ▸Very well supported ▸ Very good documentation ▸ Supports most of the plugins ▸ Built-in extensibility: inline or DSL extensions
- 18. JOB DSL PLUGIN ▸Folders & views ▸ … automatic triggers upon generation ▸ … using files in workspace
- 19. JOB DSL PLUG-IN ▸This remains code…
- 20. JOB DSL PLUGIN- SEED JOB ▸ DSL based generation done from a job ▸ Can generate and/or update other jobs ▸ Can even run while jobs are running :) SEED JOB GENERATED JOB(S) DSL SCRIPT Generates Accesses (SCM or inline) GENERATED JOB(S) GENERATED JOB(S)
- 21. PIPELINE EVOLUTION ▸ OneSeed DSL job is all very good but… ▸ Pipeline evolves with the code Builds this code Builds this code W ill fail for this code New platform being added Job for the new platform
- 22. BRANCHING ▸ One SeedDSL job is all very good but… ▸ Different pipelines for different branches develop release/2.0 Pipelines for releases might be more complex Release job
- 23. PIPELINE VERSIONS ▸ Wheredo we put the DSL script? develop release/2.0 Pipelines for releases might be more complex DSL.GROOVY DSL.GROOVY DSL.GROOVY
- 24. PIPELINE AS CODE ▸Your pipeline is linked to the code it builds ▸ Define your pipeline in your code Project src pom.xml job-dsl-script.groovy
- 25. PIPELINE CODE DUPLICATION ▸We can now generate a pipeline for any branch, any commit ▸ It evolves with your branches and is merged like any other piece of code ▸ That’s good enough for 1 project ▸ With several (many) projects, the level of DSL code duplication explodes! DEVELOP FEATURE/BIG RELEASE/1.0 DSL SCRIPT DSL SCRIPT DSL SCRIPT DEVELOP FEATURE/BIG RELEASE/1.0 DSL SCRIPT DSL SCRIPT DSL SCRIPT DEVELOP FEATURE/BIG RELEASE/1.0 DSL SCRIPT DSL SCRIPT DSL SCRIPT DEVELOP FEATURE/BIG RELEASE/1.0 DSL SCRIPT DSL SCRIPT DSL SCRIPT DEVELOP FEATURE/BIG RELEASE/1.0 DSL SCRIPT DSL SCRIPT DSL SCRIPT
- 26. PIPELINE CODE DUPLICATION ▸Job DSL code duplication has the same issues than production code duplication DEVELOP FEATURE/BIG RELEASE/1.0 DSL SCRIPT DSL SCRIPT DSL SCRIPT DEVELOP FEATURE/BIG RELEASE/1.0 DSL SCRIPT DSL SCRIPT DSL SCRIPT DEVELOP FEATURE/BIG RELEASE/1.0 DSL SCRIPT DSL SCRIPT DSL SCRIPT DEVELOP FEATURE/BIG RELEASE/1.0 DSL SCRIPT DSL SCRIPT DSL SCRIPT ✘ ✘ ✘ ✘ ✘ ✘ ✘✘✘✘✘✘ DEVELOP FEATURE/BIG RELEASE/1.0 DSL SCRIPT DSL SCRIPT DSL SCRIPT DEVELOP FEATURE/BIG RELEASE/1.0 DSL SCRIPT DSL SCRIPT DSL SCRIPT ✘✘✘✘✘✘ DEVELOP FEATURE/BIG RELEASE/1.0 DSL SCRIPT DSL SCRIPT DSL SCRIPT DEVELOP FEATURE/BIG RELEASE/1.0 DSL SCRIPT DSL SCRIPT DSL SCRIPT ✘✘✘✘✘✘ DEVELOP DSL SCRIPT DEVELOP DSL SCRIPT ✘ ✘ DEVELOP DSL SCRIPT ✘ DEVELOP DSL SCRIPT ✘ LEASE/1.0 L SCRIPT LEASE/1.0 L SCRIPT LEASE/1.0 L SCRIPT LEASE/1.0 L SCRIPT DEVELOP FEATURE/BIG RELEASE/1.0 DEVELOP FEATURE/BIG RELEASE/1.0 DEVELOPLEASE/1.0
- 28. PIPELINE LIBRARIES TOTHE RESCUE ▸ Pipeline is code ▸ Reuse of code through versioned libraries DEVELOP FEATURE/BIG RELEASE/1.0 DSL SCRIPT DSL SCRIPT DSL SCRIPT PIPELINE DSL LIBRARY 1.1 1.0 Normal project Can be tested Can be released
- 29. PIPELINE DSL LIBRARYB PIPELINE LIBRARIES TO THE RESCUE ▸ DSL libraries as code libraries DEVELOP FEATURE/BIG DEVELOP DSL SCRIPT DSL SCRIPT DSL SCRIPT PIPELINE DSL LIBRARY A 1.1 1.0 COMMON DSL LIBRARY 1.0 Dependencies 2.0
- 30. ARE WE DONE? ▸We can describe a pipeline using a DSL ▸ The pipeline is defined together with the code it builds ▸ The DSL can use libraries to reduce code duplication ?
- 31. NOT QUITE… ▸ Thisis not enough to really scale ▸ We still have to write some DSL ▸ Self service ✔ ▸ Security ✘ ▸ Simplicity ✘ ▸ Extensibility ✔
- 32. PIPELINE AS “NOTCODE” ▸ Let’s describe the pipeline using a properties file ▸ Which pipeline library & which version ▸ Configuration properties - specific to the library ▸ Property file format ubiquitous ▸ No code running on the master ▸ Can be used for reporting on all the pipelines!
- 33.
- 34. PIPELINE AS… PROPERTIES SEEDJOB SCM Repository Jobs Gets the seed.properties Gets the pipeline library version Configures and runs the pipeline library
- 35.
- 36. PIPELINE AS… METADATA ▸The seed.properties files provide a wonderful way to do reporting on all projects and branches DEVELOP FEATURE/BIG RELEASE/1.0 SEED SEED SEED DEVELOP FEATURE/NEW RELEASE/3.4 SEED SEED SEED seed.properties seed.properties “Give me all branches using JDK 6” “Give me all projects having no SonarQube scan” “…”
- 37. SEED PLUGIN ▸ https://github.com/jenkinsci/seed-plugin ▸Allows to generate: ▸ projects folders ▸ branches pipelines ▸ based on seed files (properties and/or DSL) ▸ integration with hooks
- 38. SEVERAL INTEGRATION MODES SEED.PROPERTIES SEEDPLUGIN SEED.PROPERTIES SEED.GROOVYSEED.GROOVY PIPELINE LIBRARY PIPELINE LIBRARY BRANCH PIPELINE 95% 4% 1%
- 39. GENERATION STRUCTURE SEED PROJECT GENERATOR PROJECTFOLDER BOOTSTRAPPING BRANCH GENERATOR BRANCH FOLDER BRANCH JOB 1 BRANCH JOB 2 BRANCH JOB 3 BRANCH JOB 4 GENERATION Project teamJenkins team
- 40. PIPELINE SECURITY SEED A FOLDER AGENERATOR BOOTSTRAPPING A team Jenkins team B team GENERATION A BRANCHES A PIPELINES B FOLDER B GENERATOR B BRANCHES B PIPELINES
- 41. GENERATION - HOWIT LOOKS LIKE BOOTSTRAPPING GENERATION GENERATION
- 42.
- 43. HOOKS ▸ Generations canbe automated using hooks at SCM level ▸ Support for GitHub, BitBucket, generic HTTP calls (for SVN) ▸ Configurable. For example: BRANCH CREATION SCM EVENT Seed plug-in COMMIT SEED CHANGED BRANCH DELETION PIPELINE EVENT Generation Triggers the pipeline Regenerates the pipeline Deletes the pipeline
- 44. RESPONSIBILITIES Jenkins team Pipeline libraries Developsand maintains Development team Seed files Defines Seed plug-in SCM Triggers
- 45. WHAT DID WEJUST ACHIEVE? ▸ Automation of automation ▸ Self service ✔ ▸ Pipeline automation from SCM ▸ Security ✔ ▸ Project level authorisations ▸ No code on the master ▸ Simplicity ✔ ▸ Property files ▸ Extensibility ✔ ▸ Pipeline libraries ▸ Direct job DSL still possible
- 46. OUT OF THEJUNGLE…
- 47. SEED & PIPELINEPLUGIN ▸ The Seed plugin will keep working ▸ It can already generate pipeline jobs (Job DSL) ▸ But overlap of functionalities Branch pipelines Pipeline as code SEED PIPELINE Hook integration Pipeline as properties Community & support Pipeline libraries Pipeline script library
- 48. SEED IN PIPELINEPLUGIN ▸ The Seed plugin as extension of the Pipeline plugin Branch pipelines Pipeline as code SEED PIPELINE Hook integrationPipeline as properties Community & support Pipeline libraries Pipeline script library
- 49. THANKS YOU! Thanks to:Contact: ▸ http://nemerosa.com ▸ @DamienCoraboeuf