Managing Jenkins with Gradle

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Managing Jenkins With Gradle Gary Hale Gradle Summit 2014

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Who is this guy? 15+ years in DevOps Gradle Weenie Compulsive Automator

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What you should do Ask questions! Interrupt / Interact Complete the Evaluation

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What We’ll Talk About Evolution Jenkins Plugin Basics Demonstrations

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Extensible Open Source Active Ecosystem Why is Jenkins Awesome? Jenkins Open Source Distributed Model Distributed Model Extensible

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Why is Jenkins Not Awesome? When we get beyond a handful of Jobs, it becomes tedious to maintain

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Couple Configuration with Project Track Changes Motivations Discipline Track Changes Couple Configuration with Project Perform Validations/Comparison

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Leverage Existing Skillset DRY Delegate Minimize Overhead Rebuild from Scratch Delegate Motivations Maintenance Minimize Overhead DRY Rebuild from Scratch Leverage Existing Skillset Enforce Standards

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Evolution of Jenkins Management Manual Solutions Manual Edits Copy From Existing Script Solutions Script Console System Groovy Script Scriptler Job-like Solutions Jenkins Template Plugin Jenkins Job DSL Plugin External Solutions Jenkins Job Builder Gradle Jenkins Plugin Growth / Complexity

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Manual Solutions “Nothing is as simple as we hope it will be.” Jim Horning

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Limited Parameters Groovy Jenkins Model Extremely Powerful Script Solutions Limited Parameters Jenkins Model Extremely Powerful Groovy Better for One-offs

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Many-to-one Template Jobs Job-like Solutions Template Jobs Job Template Plugin Many-to-one Best When Combined

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Storable No Validation Template Jobs Powerful DSL Job-like Solutions Powerful DSL Job DSL Plugin Storable Template Jobs No Validation One instance

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Openstack Clean Configuration Python/Yaml External Solutions Python/Yaml Jenkins Job Builder Openstack Purely Declarative Clean Configuration

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XML Manipulation Template Jobs Jenkins Job DSL Programmatic External Solutions Programmatic Gradle Jenkins Plugin XML Manipulation Jenkins Job DSL Template Jobs Create/Delete/Validate

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Does it make sense to manage jenkins with a build automation tool? Question (Think About It…)

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Gradle Jenkins Plugin Concepts Gradle (static model) Templates Views Jobs Jenkins (live model) Views Jobs Updates

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deleteJenkinsItems dumpJenkinsItems validateJenkinsItems updateJenkinsItems Gradle Jenkins Plugin updateJenkinsItems Tasks deleteJenkinsItems validateJenkinsItems dumpJenkinsItems dumpRemoteJenkinsItems

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Gradle Jenkins Plugin jenkins { servers { … } templates { … } jobs { … } views { … } } Conventions

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Servers servers { server1 { url ‘http://jenkins.somewhere.com’ username ‘user1’ password ‘password1’ } } Secured

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Servers servers { server1 { url ‘http://jenkins.somewhere.com’ secure false } } Unsecured

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Templates templates { template1 { xml file(‘template.xml’) } } XML

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Templates templates { template1 { dsl file(‘template.dsl’) } } DSL

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Jobs jobs { build_job1 { server servers.server1 definition { xml file(‘build_job1.xml’) } } } XML

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Jobs jobs { build_job1 { server servers.server1 dsl { using ‘template1’ } } } DSL

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Views views { view1 { xml file(‘view1.xml’) } } XML

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Views views { view1 { dsl { … } } } DSL

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Multiple DSL Form jenkins { defaultServer servers.server1 dsl fileTree(‘jenkins’).include(‘*.dsl’) dsl { … } }

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Demonstrations

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Does it make sense to manage jenkins with a build automation tool? Question

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Is Gradle a Build Automation Tool? The Right Question

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Is a Swiss army knife a knife?

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References https://github.com/ghale/gradle-jenkins-plugin https://github.com/ghale/summit2014