Declarative jenkins pipeline example

pipeline.groovy

pipeline {
    
    //run by default on docker-in-docker slave
    agent {
        label 'docker'
    }
    
    stages {
        //demo of running builds within custom container
        stage('PrintNodeVersion') {
            //run this stage within docker container created out of
            //node:8 image
            agent {
                docker {
                    image 'node:8-alpine'
                }
            }
            //print out node version
            steps {
                sh 'node -v'
            }
        }
        
        //demo for building and pushing container
        stage('BuildCiinaboxSlaveImage'){
            agent {
                label 'docker-dood'
            }
            steps {
                //script is denoting standard Jenkins pipeline code
                script {
                    git url: 'https://github.com/base2Services/ciinabox-containers.git'
                }
                
                script {
                    dir('jenkins/2') {
                        docker.build('base2/ciinabox-jenkins')
                    }    
                }       
                
            }
            
        }
        
        //demo for using shared pipeline library
        stage('ShellOutFromSharedLib'){
            agent {
                label 'docker-dood'
            }
            //no need to specify agent as it is already specified 
            //on top level pipeline 
            steps {
                script {
                    //load shared pipelines library
                    @Library('github.com/base2Services/ciinabox-pipelines@master')
                    
                    //use shellOut helper method from pipeline
                    //library to list docker images on agent
                    def dockerVersion = shellOut('docker --version')
                    echo "Docker version on agent:\n\n${dockerVersion}"
                    
                    sh "docker info"
                }
            }
        }
    }
}