Jenkins Simple Multibranch Pipeline

Configure Credentials

This is optional if you intend to leave you repository public for now.

Configure label for node

• The pipeline we use spcifies which agent should run it (I use workers in my example):

1agent { label 'workers' }

• So, I'd label my controller with that
• Go to:
  Dashboard->Manage Jenkins ->Nodes
• You should see your only node there:
  Click on it, and choose Configure from the left menu
• Add a label, and save

Create your service repository

• Start by cloning this repository
• Delete your remote, and add a remote of your own, so that you will push to your own repository in your github account.

Add branches

• You should have 2 branches:
  • master (or **main if you wish)
  • develop
• Both branches should have the same content, including the Jenkinsfile(s).
• Make sure you also push to your repository in github

Create a multibranch job

• Create a multibranch pipeline job (name it), save
• Configure (click Configure on the left menu)
• Add source:
  • If credentials are needed, add them
  • add HTTPS url
  • wait for the scan to succeed
• run both branches, make sure build is successful

Different operations in different branches

• We'll add a 2nd stage that will be run only in the develop branch
• Add the following code to you Jenkinsfile:

 1      stage('cat') {
 2            when {
 3                branch 'dev*'
 4            }
 5            steps {
 6                sh '''
 7                cat README.md
 8                '''
 9            }
10        }

• Merge, so that it is in both branches
• Try building in both branches