Jenkins Pipeline Basics

JENKINS PIPELINE TEMPLATE

What is a Jenkinsfile? It is a text file that contains instructions, templates, definitions.

It needs some plugins or pointers to those plugins in order to work. So it can establish connections to AWS, AZURE, etc

Template:

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

• pipeline: Task that you are trying to accomplish
• agent any: Build Agent
• Stages: This are the stages
• Steps: The work that is being done in the pipeline

Multi Stage Pipeline

JENKINSFILE EXAMPLE

File named Jenkinsfile

This is just an example that could be considered as reference:

pipeline {
  agent any
  tools {
    go 'go-1.17'
  }
  
  environment {
    GO111MODULE='on'
  }
  
  stages {
    stage('Test') {
      steps {
        git 'https://github.com/AdminTurnedDevOps/go-webapp-sample.git'
        sh 'go test ./..'
      }
    }
    stage('Build') {
      steps {
        git 'https://github.com/AdminTurnedDevOps/go-webapp-sample.git'
        sh 'go build .'
      }
    }
    stage('Run') {
      steps {
        sh 'cd /var/lib/jenkins/workspace/go-full-pipeline && go-webapp-sample &'
      }
    }
  }
}

For building our image we could use:

stages {
  stage ('Building our image') {
    steps {
      script {
        app = docker.build("adminturneddevops/go-webapp-sample")
      }
    }
  }
}

Considerations:

• All pipelines are under /var/lib/jenkins/workspace/ and in this case the name is go-full-pipeline
• Using Plugins GOand Docker