Create Pipeline for Jenkins

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Today I’m going to show you how to create a Pipeline for Jenkins.

What is a Pipeline in Jenkins?

A pipeline in Jenkins is a sequence of automated processes that are executed to build, test, and deploy a software project.

A Jenkins pipeline is defined as a configuration file in the Groovy programming language and can include multiple steps, such as code download from a version control system, execution of automated tests, and deployment to a production environment.

The main goal of a pipeline in Jenkins is to provide clear visibility and complete control over the software delivery process, and to ensure its quality and speed.

Once you understand what a Pipeline is in Jenkins, let’s create a file called Jenkinsfile at the root of our project.

pipeline{
    agent any
    stages{
        stage('Build'){
            steps{
                echo 'Building the project'
            }
        }
        stage('Test'){
            steps{
                echo 'Testing the project'
            }
        }
        stage('Deploy'){
            steps{
                echo 'Deploying the project'
            }
        }
    }
    
}

In this example, it only prints variables. We have defined 3 stages: Build, Test, and Deploy.

Now let’s assign the Jenkinsfile to our Jenkins.

First, open the Jenkins URL and click on New Item

Then, enter a name and select Pipeline

Click OK.

Fill in the configuration

Scroll down to Pipeline and change the Definition to “Pipeline script from SCM”:

Now select GIT and enter the repository and login details

Remember, if you’re using GitLab, change the default branch from MASTER to MAIN:

Finally, specify the path of the Jenkinsfile. In our case, it is at the root, so we don’t need to change anything:

Now click on Build Now

And now we can see how the process has worked