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Er. Bhupendra
Er. Bhupendra

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Jenkins RoadMap

#devops #cicd #automation #beginners

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Here is a Complete Jenkins Roadmap (Beginner → Advanced → Expert) used by many DevOps engineers in real projects.

🚀 Complete Jenkins Roadmap

🟢 1. Jenkins Fundamentals

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Start with the basics.

Topics:

  • What is CI/CD
  • Why Jenkins is used
  • Jenkins architecture (Controller + Agents)

  • Jenkins installation

    • Linux
    • Docker
    • AWS EC2

  • Jenkins UI walkthrough

  • Jenkins jobs overview

🟢 2. Jenkins Job Types

Understand different Jenkins job types.

Topics:

  • Freestyle jobs
  • Pipeline jobs
  • Multibranch pipelines
  • Folder organization

Practice:

  • Build a simple Java / NodeJS project.

🟡 3. Jenkins Pipelines

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The most important Jenkins concept.

Topics:

Declarative Pipeline

  • pipeline
  • agent
  • stages
  • steps
  • environment
  • post actions

Scripted Pipeline

  • Groovy syntax
  • node block
  • stage block
  • scripted vs declarative

Practice:

Create pipelines for:

  • Build
  • Test
  • Deploy

🟡 4. Jenkinsfile Best Practices

Topics:

  • Writing Jenkinsfile
  • Environment variables
  • Pipeline parameters
  • Retry and timeout
  • Error handling
  • Post actions
  • Parallel stages

Example:

pipeline {
 agent any

 stages {

  stage('Build') {
   steps {
    sh 'mvn clean package'
   }
  }

  stage('Test') {
   steps {
    sh 'mvn test'
   }
  }

 }
}
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🟡 5. Jenkins Credentials Management

Security is critical.

Topics:

  • Credentials store
  • Username/password
  • SSH keys
  • Secret text
  • Secret files
  • Using credentials in pipelines

Example:

withCredentials([string(credentialsId: 'docker-pass', variable: 'PASS')]) {
 sh 'docker login'
}
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🟡 6. Jenkins Webhooks (Automation)

Automate builds when code changes.

Topics:

  • GitHub webhook
  • GitLab webhook
  • Bitbucket webhook
  • Poll SCM vs webhook
  • Automatic pipeline trigger

🟡 7. Jenkins Plugins

Jenkins works with plugins.

Important plugins:

  • Git Plugin
  • Pipeline Plugin
  • Docker Plugin
  • Kubernetes Plugin
  • Blue Ocean
  • SonarQube Plugin

Learn:

  • Installing plugins
  • Managing plugin updates
  • Plugin dependencies

🔵 8. Jenkins Distributed Builds

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Scale Jenkins using agents.

Topics:

  • Jenkins controller
  • Jenkins agents
  • SSH agents
  • Docker agents
  • Kubernetes agents

Benefits:

  • Faster builds
  • Parallel builds
  • Scaling CI pipelines

🔵 9. Jenkins with Docker

Very common in DevOps pipelines.

Topics:

  • Build Docker images
  • Push to DockerHub / ECR
  • Docker agents
  • Docker inside Jenkins

Example pipeline:

docker build -t app:v1 .
docker push repo/app:v1
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🔵 10. Jenkins Shared Libraries

Important for large teams.

Topics:

  • Global shared libraries
  • Reusable pipeline functions
  • Library structure

Example:

@Library('devops-lib') _
buildApp()
deployApp()
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🔵 11. Artifact Management

Topics:

  • Archive artifacts
  • Stash / unstash
  • Upload artifacts to:

Tools:

  • Nexus
  • Artifactory
  • S3

🔵 12. DevSecOps Integration

Add security tools to pipeline.

Tools:

  • SonarQube (code quality)
  • Trivy (container scanning)
  • OWASP Dependency Check
  • SAST tools

🔵 13. Kubernetes CI/CD

Modern DevOps workflow.

Topics:

  • Jenkins + Kubernetes
  • Build Docker images
  • Push to registry
  • Deploy using:

Tools:

  • ArgoCD
  • Helm
  • kubectl

🔴 14. Jenkins Monitoring

Monitor Jenkins health.

Tools:

  • Prometheus
  • Grafana
  • Jenkins metrics plugin

🔴 15. Jenkins Backup & Recovery

Production best practice.

Topics:

  • Jenkins Home directory
  • Backup strategies
  • Disaster recovery

🔴 16. Jenkins Configuration as Code (JCasC)

Advanced automation.

Topics:

  • Jenkins YAML configuration
  • Infrastructure as Code for Jenkins

⭐ Ultimate Real-World Jenkins Project

Build this end-to-end CI/CD pipeline:

Developer pushes code
       ↓
GitHub Webhook
       ↓
Jenkins Pipeline
       ↓
Build Application
       ↓
Run Tests
       ↓
SonarQube Scan
       ↓
Build Docker Image
       ↓
Push to DockerHub
       ↓
Deploy to Kubernetes
       ↓
ArgoCD Sync
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📊 Jenkins Skill Level

Level Skills
Beginner Installation, UI, Jobs
Intermediate Pipelines, Webhooks, Credentials
Advanced Docker, Kubernetes, Shared Libraries
Expert DevSecOps, JCasC, Multi-node scaling

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