DevOps Classroomnotes 28/Feb/2023

Jenkins Multi node configuration

• Multi node configuration using pem files/private files
  
• Configure Game of life
  
  
  
  

Jenkins 2

• This is all about Pipeline as code
• Pipeline as a code refers to creating CI/CD Pipeline in some file format and version control (generally closer to code)
• Jenkins 1 was predominantly UI oriented, where as in Jenkins 2 the concept of pipelines were introduced natively.
• Now we write our build steps in these pipelines and then version control.
• Jenkins has created 2 types of pipelines
  • Scripted Pipeline:
    • This pipeline allows to use Groovy Language directly
    • This is a different approach
  • Declarative Pipeline
    • This pipeline internally uses Groovy but we use Jenkins DSL (Domain Specific Language)
    • Similar for the benifit of classic jenkins users

Groovy

• There are two popular Java Based Languages
  • Scala (Big Data Purposes)
  • Groovy (Scripting purposes)

Lets Quickly build Gameoflife on node1 using

Scripted pipeline

• Lets look at below steps for an overview
  
  

node('MAVEN_JDK8')
{
    stage('vcs')
    {
        git 'https://github.com/wakaleo/game-of-life.git'
    }
    stage('build') 
    {
        sh 'export PATH="/usr/lib/jvm/java-1.8.0-openjdk-amd64/bin:$PATH" && mvn package'

    }
    stage('postbuild')
    {
        archiveArtifacts artifacts: '**/target/gameoflife.war', followSymlinks: false
        junit '**/surefire-reports/TEST-*.xml'
    }
}

• Declarative

pipeline {
    agent { label 'MAVEN_JDK8' }
    stages {
        stage('VCS') {
            steps {
                git 'https://github.com/wakaleo/game-of-life.git'
            }
        }
        stage('build') {
            steps {
                sh 'export PATH="/usr/lib/jvm/java-1.8.0-openjdk-amd64/bin:$PATH" && mvn package'
            }
        }
    }

}