DevOps Classroom Series – 20/Feb/2021

Declarative Pipeline Structure

• In this section lets try to understand the declarative pipelines structure
• Now evaluate the image with the pipeline below

pipeline {
    agent { label 'ltecomm'}
    stages {
        stage('scm') {
            steps {
                git 'https://github.com/wakaleo/game-of-life.git'        
            }
        }
        stage('build') {
            steps {
                sh script: 'mvn clean package'
            }
        }
        stage('post build') {
            steps {
                junit 'gameoflife-web/target/surefire-reports/*.xml'
                archiveArtifacts 'gameoflife-web/target/*.war'
            }
        }
    }
}

• Lets set one build trigger using pipeline. Refer Here for the changeset which uses triggers section Refer Here for the documentation
• Exercise: Make changes in the pipeline to reflect pollSCM or upstream jobs
• Now lets try to create parameters in our build job Refer Here
• Refer Here for the changeset
• If you need to set any Jenkins Environmental variables Refer Here
• If you need to use different version of tools which you have configured in Manage Jenkins => Global Tools section, that can be used by using tools section Refer Here
• Lets add a build timeout of 30 mins
• Now we can look into the pipeline steps: Refer Here
• Now lets copy files from one node to other using stash and unstash steps Refer Here for the changeset
• Now lets create a game of life source code with three branches
  • developer
  • qa
  • release
• For the repository Refer Here
• Now lets create Jenkinsfile per branch so that
  • developer build is triggered every Hour
  • qa build is triggered once in a day at 11:59 PM on different node
  • release build is triggered manually
• Now lets configure one build job which will create one job per git branch
• Refer Here for the post step
• If you want to send an extended email Refer Here

Problems to be resolved

• How do we ensure the code written by developers is meeting standards/best practices => SonarQube
• We build the project multiple times how do we store the project artifacts so that they can be retrieved in the future => Jfrog/Artifactory
• Understanding One of the popular branching strategy => Gitflow
• Understanding git tags and their importance
• Git Ops => Pull request
• Git Sub modules
• Azure DevOps => .net build environment. (Next weekend)