Jenkins Shared Library Example

The purpose of sharing parts of a pipeline is to avoid redundancies, promoting reuse and facilitate maintenance. In the Jenkins this can be achieved through the Jenkins Shared Libraries feature as follow example.

Start up Jenkins

• docker run -p 8080:8080 -p 50000:50000 jenkins/jenkins:alpine
• Access https://localhost:8080
• Copy and paste the admin password printed in the docker run console
• Select the install default plugins option

Create a Shared Library (respecting the directory structure)

• Example in the vars folder

Configure the shared library in the Jenkins

• Access option Manage Jenkins/Configure System
• Add a Global Pipeline Libraries configuration
• Expected result:

Create a Pipeline Job

• Configure the Pipeline Job with the pipeline script below

Pipeline script content:

genericPipeline {
    appName = "application-demo"
	
	echo "Executing in the ${appName} Jenkinsfile"
}

• Disable Use Groovy Sandbox
• Expected result:

Run the Pipeline Job

• Run the job through the Build Now
• Verify the log
• Expected result:

Accessing the generic pipeline help

• Access the job/Pipeline Syntax/Global Variables Reference
• Expected result:

Source: https://jenkins.io/doc/book/pipeline/shared-libraries/