Scripted & Declarative Pipelines Demo

Learning Resources for DevOps, SRE, Cloud & Engineering Management

Prerequisites

Run the below prerequisites on Jenkins (one-time task) to be able to handle the Python commands:

sudo apt update
sudo apt install python3-pip
pip3 install xmlrunner
pip3 install flask

- Apart from the above, install the Blue-Ocean plugin in Jenkins to be able to view the Junit Test Reports. We assume that Docker is already installed in the Jenkins server.

A demonstration of Scripted Pipeline with Stages to run a Python script

node('master') {
 stage('Source') {
  git 'https://github.com/BINPIPE/scripted-and-declarative-pipeline-demo.git'
 }
 stage('Build') {
  sh 'docker build -t flask-app:latest .'
 }

 stage('Test') {
  sh 'python3 test.py'
 }

}

Choose the Pipeline option while creating the Jenkins job and add the below code in the script window. Alternatively, use the Jenkinsfile-Scripted in the repository to avail the pipelinescript. Follow the video for other details of execution:

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A demonstration of Declarative Pipeline with Stages to run a Python script

Choose the Pipeline option while creating the Jenkins job and add the below code in the script window. Alternatively, use the Jenkinsfile-Declarative in the repository to avail the pipelinescript. Follow the video for other details of execution:

pipeline {
    agent any
    stages {
        stage('Build') {
            steps {
                sh 'docker build -t flask-app:latest .'
            }
        }
        
        
        stage('Test') {
            steps {
                sh 'python3 test.py'
            }
            post {
                always {junit 'test-reports/*.xml'}
            }
        }
        
        stage('Approve Deployment') {
            input{
                 message "Do you want to proceed for deployment?"
                    }
            steps {
                sh 'echo "Deploying into Server"'
                sh 'docker rm -f flask-app || true'
                sh 'docker run -d -p 5000:5000 --name flask-app flask-app:latest'
                sh 'echo "Check App at http://ip-address:5000/"'

              }
        }    
        
    }     
}

BINPIPE aims to simplify learning for those who are looking to make a foothold in the industry.
Write to me at [email protected] if you are looking for tailor-made training sessions.
For self-study resources look around in this repository, the Binpipe Blog and Youtube Channel.

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📒 Maintainer: Prasanjit Singh | www.binpipe.org

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