DevOps Classroom Series – 30/Sept/2020

Jenkins 2 Pipelines

• Jenkins supported the Domain Specific Language (DSL) based on groovy.

• This DSL is core feature of Jenkins 2

• Lets look at Jenkins freestyle project and ask the following questions

  • How to track the changes done in Jenkins build configuration?
    • Search for suitable plugin => Jobconfighistory plugin
  • How to use the Jenkins Build configuration created in One Jenkins Master to be used in Some Other Jenkins Server?
    • Search for a suitable Plugin => Import/Export Jenkins Jobs
  • Build steps might change with changes in development project, So how can we handle this?
    • Change manually on the UI for all the jobs created.
  • How to handle changes in build steps for each branch in version controlled?
    • Create different jobs

• Jenkinsfile:

  • This file represents the pipeline definition.
  • This file can be version controlled

• Lets create a pipeline job in jenkins

• This can create a pipeline project. But lets see the actual pipeline project in action

• Now fork a gameoflife into your account. Clone the code into your folder and create a Jenkinsfile with the content as present over here

• Now lets create a Jenkins job

• Now Lets build

• In this way of creating jenkins projects, build steps are taken away from jenkins and they are version controlled and present near to the code.

  • When the build steps are changed, Developers can edit the build configuration as part of commit.
  • Branch wise build configurations are easier to handle.

• Pipleines in Jenkins

• Project Types in Jenkins (Apart from free style)