DevOps Fundamentals: CI/CD Pipeline Setup with Jenkins and Docker

📅 September 29, 2025 👤 Ramesh Sundararamaiah ⏱️ 13 min read 📂 DevOps Tutorials

DevOps practices have revolutionized software delivery by combining development and operations teams, enabling faster releases, improved quality, and enhanced collaboration. This comprehensive guide covers DevOps fundamentals, CI/CD pipeline implementation with Jenkins and Docker, automation strategies, and best practices for building production-ready delivery pipelines.

📑 Table of Contents

Table of Contents

  1. DevOps Fundamentals
  2. Jenkins Installation and Configuration
  3. Docker Integration
  4. CI/CD Pipeline Setup
  5. Build and Test Automation
  6. Deployment Strategies
  7. Security and Secrets Management
  8. Monitoring and Observability
  9. Best Practices

1. DevOps Fundamentals

What is DevOps?

DevOps is a set of practices that combines software development (Dev) and IT operations (Ops) to shorten the development lifecycle and provide continuous delivery with high quality.

Key DevOps Principles:

  • Automation: Automate repetitive tasks in build, test, and deployment
  • Continuous Integration: Frequently merge code changes to detect issues early
  • Continuous Delivery: Automate deployment to any environment
  • Infrastructure as Code: Manage infrastructure through version-controlled code
  • Monitoring and Logging: Continuous feedback from production systems
  • Collaboration: Break down silos between development and operations

CI/CD Pipeline Overview

# CI/CD Pipeline Stages

1. Source Control (Git) → 
2. Build (Compile, Package) → 
3. Test (Unit, Integration, E2E) → 
4. Security Scan (SAST, Dependency Check) → 
5. Artifact Storage (Docker Registry, Nexus) → 
6. Deploy to Staging → 
7. Automated Testing → 
8. Deploy to Production → 
9. Monitor and Alert

2. Jenkins Installation and Configuration

Install Jenkins on Ubuntu

# Update system
sudo apt update && sudo apt upgrade -y

# Install Java (Jenkins requirement)
sudo apt install -y openjdk-11-jdk

# Verify Java installation
java -version

# Add Jenkins repository
curl -fsSL https://pkg.jenkins.io/debian-stable/jenkins.io-2023.key | sudo tee 
    /usr/share/keyrings/jenkins-keyring.asc > /dev/null

echo deb [signed-by=/usr/share/keyrings/jenkins-keyring.asc] 
    https://pkg.jenkins.io/debian-stable binary/ | sudo tee 
    /etc/apt/sources.list.d/jenkins.list > /dev/null

# Install Jenkins
sudo apt update
sudo apt install -y jenkins

# Start Jenkins
sudo systemctl start jenkins
sudo systemctl enable jenkins

# Check status
sudo systemctl status jenkins

# Get initial admin password
sudo cat /var/lib/jenkins/secrets/initialAdminPassword

Install Jenkins with Docker

# Create Jenkins home directory
mkdir -p $HOME/jenkins_home

# Run Jenkins container
docker run -d 
    --name jenkins 
    -p 8080:8080 
    -p 50000:50000 
    -v $HOME/jenkins_home:/var/jenkins_home 
    -v /var/run/docker.sock:/var/run/docker.sock 
    jenkins/jenkins:lts

# Get initial admin password
docker exec jenkins cat /var/jenkins_home/secrets/initialAdminPassword

# Access Jenkins at http://localhost:8080

Initial Jenkins Configuration

# 1. Access Jenkins web interface
http://your-server-ip:8080

# 2. Enter initial admin password

# 3. Install suggested plugins:
- Git plugin
- Docker plugin
- Pipeline plugin
- Blue Ocean (modern UI)
- Credentials Binding Plugin
- SSH Agent Plugin

# 4. Create admin user

# 5. Configure Jenkins URL
http://your-server-ip:8080/

Configure Jenkins Global Tools

# Navigate to: Manage Jenkins > Global Tool Configuration

# Git Configuration
Name: Default
Path: git (or /usr/bin/git)

# Maven Configuration
Name: Maven-3.9
Install automatically: Yes
Version: 3.9.0

# Docker Configuration
Name: docker
Install automatically: No
Docker installation root: /usr/bin/docker

# JDK Configuration
Name: JDK-11
JAVA_HOME: /usr/lib/jvm/java-11-openjdk-amd64

Jenkins Configuration as Code (JCasC)

# jenkins.yaml
jenkins:
  systemMessage: "Jenkins configured automatically by JCasC"
  numExecutors: 5
  mode: NORMAL
  
  securityRealm:
    local:
      allowsSignup: false
      users:
        - id: "admin"
          password: "${JENKINS_ADMIN_PASSWORD}"
  
  authorizationStrategy:
    loggedInUsersCanDoAnything:
      allowAnonymousRead: false

  clouds:
    - docker:
        name: "docker"
        dockerApi:
          dockerHost:
            uri: "unix:///var/run/docker.sock"
        templates:
          - labelString: "docker-agent"
            dockerTemplateBase:
              image: "jenkins/agent:latest"
            
credentials:
  system:
    domainCredentials:
      - credentials:
          - usernamePassword:
              scope: GLOBAL
              id: "docker-hub"
              username: "${DOCKER_USERNAME}"
              password: "${DOCKER_PASSWORD}"
          - string:
              scope: GLOBAL
              id: "github-token"
              secret: "${GITHUB_TOKEN}"

tool:
  git:
    installations:
      - name: "Default"
        home: "git"
  
  maven:
    installations:
      - name: "Maven-3.9"
        properties:
          - installSource:
              installers:
                - maven:
                    id: "3.9.0"

3. Docker Integration

Install Docker

# Install Docker on Ubuntu
sudo apt update
sudo apt install -y apt-transport-https ca-certificates curl software-properties-common

# Add Docker GPG key
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg

# Add Docker repository
echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null

# Install Docker
sudo apt update
sudo apt install -y docker-ce docker-ce-cli containerd.io docker-compose-plugin

# Start Docker
sudo systemctl start docker
sudo systemctl enable docker

# Add Jenkins user to docker group
sudo usermod -aG docker jenkins
sudo systemctl restart jenkins

# Verify Docker installation
docker --version
docker compose version

Dockerfile Best Practices

# Multi-stage Dockerfile for Node.js application
# Stage 1: Build
FROM node:18-alpine AS builder

WORKDIR /app

# Copy package files
COPY package*.json ./

# Install dependencies
RUN npm ci --only=production

# Copy application code
COPY . .

# Build application (if needed)
RUN npm run build

# Stage 2: Production
FROM node:18-alpine

# Security: Run as non-root user
RUN addgroup -g 1001 -S nodejs && 
    adduser -S nodejs -u 1001

WORKDIR /app

# Copy built artifacts from builder stage
COPY --from=builder --chown=nodejs:nodejs /app/dist ./dist
COPY --from=builder --chown=nodejs:nodejs /app/node_modules ./node_modules
COPY --from=builder --chown=nodejs:nodejs /app/package*.json ./

# Switch to non-root user
USER nodejs

# Expose port
EXPOSE 3000

# Health check
HEALTHCHECK --interval=30s --timeout=3s --start-period=40s --retries=3 
    CMD node healthcheck.js

# Start application
CMD ["node", "dist/server.js"]

Docker Compose for Multi-Container Setup

# docker-compose.yml
version: '3.8'

services:
  app:
    build:
      context: .
      dockerfile: Dockerfile
    ports:
      - "3000:3000"
    environment:
      - NODE_ENV=production
      - DATABASE_URL=postgresql://postgres:password@db:5432/myapp
      - REDIS_URL=redis://redis:6379
    depends_on:
      db:
        condition: service_healthy
      redis:
        condition: service_started
    networks:
      - app-network
    restart: unless-stopped

  db:
    image: postgres:15-alpine
    environment:
      - POSTGRES_DB=myapp
      - POSTGRES_USER=postgres
      - POSTGRES_PASSWORD=password
    volumes:
      - postgres-data:/var/lib/postgresql/data
    healthcheck:
      test: ["CMD-SHELL", "pg_isready -U postgres"]
      interval: 10s
      timeout: 5s
      retries: 5
    networks:
      - app-network
    restart: unless-stopped

  redis:
    image: redis:7-alpine
    command: redis-server --appendonly yes
    volumes:
      - redis-data:/data
    networks:
      - app-network
    restart: unless-stopped

  nginx:
    image: nginx:alpine
    ports:
      - "80:80"
      - "443:443"
    volumes:
      - ./nginx.conf:/etc/nginx/nginx.conf:ro
      - ./ssl:/etc/nginx/ssl:ro
    depends_on:
      - app
    networks:
      - app-network
    restart: unless-stopped

networks:
  app-network:
    driver: bridge

volumes:
  postgres-data:
  redis-data:

4. CI/CD Pipeline Setup

Basic Jenkinsfile

// Jenkinsfile
pipeline {
    agent any
    
    environment {
        DOCKER_IMAGE = "myapp"
        DOCKER_TAG = "${env.BUILD_NUMBER}"
        DOCKER_REGISTRY = "docker.io/myusername"
    }
    
    stages {
        stage('Checkout') {
            steps {
                git branch: 'main', 
                    url: 'https://github.com/username/myapp.git'
            }
        }
        
        stage('Build') {
            steps {
                script {
                    sh 'docker build -t ${DOCKER_IMAGE}:${DOCKER_TAG} .'
                    sh 'docker tag ${DOCKER_IMAGE}:${DOCKER_TAG} ${DOCKER_IMAGE}:latest'
                }
            }
        }
        
        stage('Test') {
            steps {
                sh 'docker run --rm ${DOCKER_IMAGE}:${DOCKER_TAG} npm test'
            }
        }
        
        stage('Push to Registry') {
            steps {
                script {
                    docker.withRegistry('https://registry.hub.docker.com', 'docker-hub-credentials') {
                        sh 'docker push ${DOCKER_REGISTRY}/${DOCKER_IMAGE}:${DOCKER_TAG}'
                        sh 'docker push ${DOCKER_REGISTRY}/${DOCKER_IMAGE}:latest'
                    }
                }
            }
        }
        
        stage('Deploy') {
            steps {
                sh '''
                    docker stop myapp || true
                    docker rm myapp || true
                    docker run -d --name myapp -p 3000:3000 ${DOCKER_REGISTRY}/${DOCKER_IMAGE}:${DOCKER_TAG}
                '''
            }
        }
    }
    
    post {
        success {
            echo 'Pipeline succeeded!'
        }
        failure {
            echo 'Pipeline failed!'
        }
        always {
            sh 'docker system prune -f'
        }
    }
}

Advanced Jenkinsfile with Multiple Environments

// Advanced Jenkinsfile
@Library('shared-library') _

pipeline {
    agent {
        docker {
            image 'maven:3.9-jdk-11'
            args '-v $HOME/.m2:/root/.m2'
        }
    }
    
    parameters {
        choice(name: 'ENVIRONMENT', choices: ['dev', 'staging', 'production'], description: 'Deployment environment')
        booleanParam(name: 'RUN_TESTS', defaultValue: true, description: 'Run tests?')
        booleanParam(name: 'DEPLOY', defaultValue: false, description: 'Deploy to environment?')
    }
    
    environment {
        APP_NAME = "myapp"
        DOCKER_REGISTRY = credentials('docker-registry-url')
        DOCKER_CREDENTIALS = credentials('docker-hub')
        KUBECONFIG = credentials('kubeconfig')
        SONAR_TOKEN = credentials('sonar-token')
    }
    
    stages {
        stage('Checkout') {
            steps {
                checkout scm
                script {
                    env.GIT_COMMIT_SHORT = sh(
                        script: 'git rev-parse --short HEAD',
                        returnStdout: true
                    ).trim()
                }
            }
        }
        
        stage('Build') {
            steps {
                sh 'mvn clean package -DskipTests'
                archiveArtifacts artifacts: 'target/*.jar', fingerprint: true
            }
        }
        
        stage('Unit Tests') {
            when {
                expression { params.RUN_TESTS }
            }
            steps {
                sh 'mvn test'
            }
            post {
                always {
                    junit 'target/surefire-reports/*.xml'
                    jacoco execPattern: 'target/jacoco.exec'
                }
            }
        }
        
        stage('Code Quality') {
            parallel {
                stage('SonarQube') {
                    steps {
                        script {
                            withSonarQubeEnv('SonarQube') {
                                sh 'mvn sonar:sonar -Dsonar.login=${SONAR_TOKEN}'
                            }
                        }
                    }
                }
                
                stage('Dependency Check') {
                    steps {
                        sh 'mvn dependency-check:check'
                    }
                }
            }
        }
        
        stage('Build Docker Image') {
            steps {
                script {
                    dockerImage = docker.build("${DOCKER_REGISTRY}/${APP_NAME}:${GIT_COMMIT_SHORT}")
                    docker.build("${DOCKER_REGISTRY}/${APP_NAME}:latest")
                }
            }
        }
        
        stage('Security Scan') {
            steps {
                script {
                    sh "trivy image --severity HIGH,CRITICAL ${DOCKER_REGISTRY}/${APP_NAME}:${GIT_COMMIT_SHORT}"
                }
            }
        }
        
        stage('Push to Registry') {
            steps {
                script {
                    docker.withRegistry("https://${DOCKER_REGISTRY}", 'docker-credentials') {
                        dockerImage.push()
                        dockerImage.push('latest')
                    }
                }
            }
        }
        
        stage('Deploy to Kubernetes') {
            when {
                expression { params.DEPLOY }
            }
            steps {
                script {
                    sh """
                        kubectl set image deployment/${APP_NAME} 
                            ${APP_NAME}=${DOCKER_REGISTRY}/${APP_NAME}:${GIT_COMMIT_SHORT} 
                            -n ${params.ENVIRONMENT}
                        
                        kubectl rollout status deployment/${APP_NAME} -n ${params.ENVIRONMENT}
                    """
                }
            }
        }
        
        stage('Integration Tests') {
            when {
                expression { params.DEPLOY && params.RUN_TESTS }
            }
            steps {
                sh 'mvn verify -Pintegration-tests'
            }
        }
        
        stage('Smoke Tests') {
            when {
                expression { params.DEPLOY }
            }
            steps {
                script {
                    def appUrl = sh(
                        script: "kubectl get service ${APP_NAME} -n ${params.ENVIRONMENT} -o jsonpath='{.status.loadBalancer.ingress[0].hostname}'",
                        returnStdout: true
                    ).trim()
                    
                    sh "curl -f http://${appUrl}/health || exit 1"
                }
            }
        }
    }
    
    post {
        success {
            slackSend(
                color: 'good',
                message: "Build Success: ${env.JOB_NAME} #${env.BUILD_NUMBER} (<${env.BUILD_URL}|Open>)"
            )
        }
        failure {
            slackSend(
                color: 'danger',
                message: "Build Failed: ${env.JOB_NAME} #${env.BUILD_NUMBER} (<${env.BUILD_URL}|Open>)"
            )
        }
        always {
            cleanWs()
        }
    }
}

5. Build and Test Automation

Automated Testing Strategy

# package.json - Node.js example
{
  "scripts": {
    "test": "jest --coverage",
    "test:unit": "jest --testPathPattern=__tests__/unit",
    "test:integration": "jest --testPathPattern=__tests__/integration",
    "test:e2e": "cypress run",
    "lint": "eslint . --ext .js,.jsx,.ts,.tsx",
    "lint:fix": "eslint . --ext .js,.jsx,.ts,.tsx --fix",
    "security:check": "npm audit",
    "security:fix": "npm audit fix"
  }
}

# Jenkinsfile test stage
stage('Automated Tests') {
    parallel {
        stage('Unit Tests') {
            steps {
                sh 'npm run test:unit'
            }
        }
        stage('Integration Tests') {
            steps {
                sh 'npm run test:integration'
            }
        }
        stage('E2E Tests') {
            steps {
                sh 'npm run test:e2e'
            }
        }
        stage('Linting') {
            steps {
                sh 'npm run lint'
            }
        }
        stage('Security Audit') {
            steps {
                sh 'npm run security:check'
            }
        }
    }
}

Continuous Testing with Docker

# docker-compose.test.yml
version: '3.8'

services:
  test-app:
    build:
      context: .
      dockerfile: Dockerfile.test
    environment:
      - NODE_ENV=test
      - DATABASE_URL=postgresql://postgres:test@test-db:5432/testdb
    depends_on:
      - test-db
      - test-redis
    command: npm test

  test-db:
    image: postgres:15-alpine
    environment:
      - POSTGRES_DB=testdb
      - POSTGRES_USER=postgres
      - POSTGRES_PASSWORD=test

  test-redis:
    image: redis:7-alpine

# Run tests in Docker
docker compose -f docker-compose.test.yml up --abort-on-container-exit

6. Deployment Strategies

Blue-Green Deployment

// Jenkinsfile - Blue-Green Deployment
pipeline {
    agent any
    
    stages {
        stage('Deploy to Green') {
            steps {
                sh '''
                    # Deploy new version to green environment
                    docker stop myapp-green || true
                    docker rm myapp-green || true
                    docker run -d --name myapp-green -p 3001:3000 myapp:${BUILD_NUMBER}
                    
                    # Health check
                    sleep 10
                    curl -f http://localhost:3001/health
                '''
            }
        }
        
        stage('Switch Traffic') {
            input {
                message "Switch traffic to green environment?"
                ok "Yes, switch!"
            }
            steps {
                sh '''
                    # Update load balancer to point to green
                    # This is environment-specific
                    
                    # Stop blue environment
                    docker stop myapp-blue || true
                    docker rm myapp-blue || true
                    
                    # Rename green to blue for next deployment
                    docker rename myapp-green myapp-blue
                '''
            }
        }
    }
}

Canary Deployment

# Kubernetes Canary Deployment
apiVersion: apps/v1
kind: Deployment
metadata:
  name: myapp-stable
spec:
  replicas: 9
  selector:
    matchLabels:
      app: myapp
      version: stable
  template:
    metadata:
      labels:
        app: myapp
        version: stable
    spec:
      containers:
      - name: myapp
        image: myapp:v1.0
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: myapp-canary
spec:
  replicas: 1  # 10% traffic
  selector:
    matchLabels:
      app: myapp
      version: canary
  template:
    metadata:
      labels:
        app: myapp
        version: canary
    spec:
      containers:
      - name: myapp
        image: myapp:v2.0

Rolling Deployment

# Kubernetes Rolling Update
apiVersion: apps/v1
kind: Deployment
metadata:
  name: myapp
spec:
  replicas: 5
  strategy:
    type: RollingUpdate
    rollingUpdate:
      maxSurge: 1        # Max pods above desired count
      maxUnavailable: 1  # Max pods that can be unavailable
  selector:
    matchLabels:
      app: myapp
  template:
    metadata:
      labels:
        app: myapp
    spec:
      containers:
      - name: myapp
        image: myapp:latest
        readinessProbe:
          httpGet:
            path: /health
            port: 3000
          initialDelaySeconds: 10
          periodSeconds: 5
        livenessProbe:
          httpGet:
            path: /health
            port: 3000
          initialDelaySeconds: 30
          periodSeconds: 10

7. Security and Secrets Management

Jenkins Credentials Management

// Using credentials in Jenkinsfile
pipeline {
    agent any
    
    stages {
        stage('Use Credentials') {
            steps {
                withCredentials([
                    usernamePassword(
                        credentialsId: 'docker-hub',
                        usernameVariable: 'DOCKER_USER',
                        passwordVariable: 'DOCKER_PASS'
                    ),
                    string(
                        credentialsId: 'api-key',
                        variable: 'API_KEY'
                    ),
                    file(
                        credentialsId: 'kubeconfig',
                        variable: 'KUBECONFIG_FILE'
                    )
                ]) {
                    sh '''
                        echo $DOCKER_PASS | docker login -u $DOCKER_USER --password-stdin
                        curl -H "Authorization: Bearer $API_KEY" https://api.example.com
                        kubectl --kubeconfig=$KUBECONFIG_FILE get pods
                    '''
                }
            }
        }
    }
}

HashiCorp Vault Integration

// Jenkinsfile with Vault
pipeline {
    agent any
    
    stages {
        stage('Get Secrets from Vault') {
            steps {
                script {
                    def secrets = [
                        [
                            path: 'secret/data/myapp/db',
                            engineVersion: 2,
                            secretValues: [
                                [envVar: 'DB_USER', vaultKey: 'username'],
                                [envVar: 'DB_PASS', vaultKey: 'password']
                            ]
                        ]
                    ]
                    
                    withVault([vaultSecrets: secrets]) {
                        sh '''
                            echo "DB User: $DB_USER"
                            # Use secrets in deployment
                        '''
                    }
                }
            }
        }
    }
}

Image Security Scanning

# Trivy security scan in Jenkinsfile
stage('Security Scan') {
    steps {
        script {
            // Install Trivy
            sh '''
                wget -qO - https://aquasecurity.github.io/trivy-repo/deb/public.key | sudo apt-key add -
                echo "deb https://aquasecurity.github.io/trivy-repo/deb $(lsb_release -sc) main" | sudo tee -a /etc/apt/sources.list.d/trivy.list
                sudo apt-get update
                sudo apt-get install trivy
            '''
            
            // Scan image
            sh '''
                trivy image --severity HIGH,CRITICAL --exit-code 1 myapp:latest
            '''
        }
    }
}

# Anchore scan
stage('Anchore Scan') {
    steps {
        anchore 'myapp:latest'
    }
}

8. Monitoring and Observability

Prometheus Metrics in Application

// Node.js application with Prometheus metrics
const express = require('express');
const promClient = require('prom-client');

const app = express();

// Create metrics
const httpRequestDuration = new promClient.Histogram({
    name: 'http_request_duration_seconds',
    help: 'Duration of HTTP requests in seconds',
    labelNames: ['method', 'route', 'status_code']
});

const httpRequestTotal = new promClient.Counter({
    name: 'http_requests_total',
    help: 'Total number of HTTP requests',
    labelNames: ['method', 'route', 'status_code']
});

// Middleware to track metrics
app.use((req, res, next) => {
    const start = Date.now();
    
    res.on('finish', () => {
        const duration = (Date.now() - start) / 1000;
        httpRequestDuration.observe({
            method: req.method,
            route: req.route?.path || req.path,
            status_code: res.statusCode
        }, duration);
        
        httpRequestTotal.inc({
            method: req.method,
            route: req.route?.path || req.path,
            status_code: res.statusCode
        });
    });
    
    next();
});

// Metrics endpoint
app.get('/metrics', async (req, res) => {
    res.set('Content-Type', promClient.register.contentType);
    res.end(await promClient.register.metrics());
});

app.listen(3000);

Jenkins Pipeline Monitoring

// Jenkinsfile with monitoring
pipeline {
    agent any
    
    options {
        timestamps()
        timeout(time: 1, unit: 'HOURS')
        buildDiscarder(logRotator(numToKeepStr: '30'))
    }
    
    stages {
        stage('Build') {
            steps {
                script {
                    def startTime = System.currentTimeMillis()
                    
                    sh 'docker build -t myapp:latest .'
                    
                    def duration = System.currentTimeMillis() - startTime
                    
                    // Send metrics to monitoring system
                    sh """
                        curl -X POST http://prometheus-pushgateway:9091/metrics/job/jenkins 
                        --data-binary 'build_duration_seconds{job="myapp",stage="build"} ${duration/1000}'
                    """
                }
            }
        }
    }
}

9. Best Practices

Pipeline Best Practices

  • Version Control Everything: Jenkinsfiles, Dockerfiles, and configuration in Git
  • Fast Feedback: Fail fast with quick unit tests before slow integration tests
  • Parallel Execution: Run independent stages in parallel
  • Idempotent Pipelines: Same input produces same output
  • Clean Workspaces: Always clean up after builds
  • Artifact Management: Store build artifacts for traceability
  • Immutable Artifacts: Never modify artifacts after creation

Docker Best Practices

  • Multi-stage Builds: Reduce image size with multi-stage Dockerfiles
  • Layer Caching: Order Dockerfile commands for optimal caching
  • Security: Run containers as non-root user
  • Health Checks: Implement container health checks
  • Resource Limits: Set CPU and memory limits
  • Image Scanning: Scan images for vulnerabilities
  • Tag Properly: Use semantic versioning, not just “latest”

Security Best Practices

  • Secrets Management: Never hardcode secrets in code or Dockerfiles
  • Least Privilege: Grant minimum required permissions
  • Image Scanning: Scan all images before deployment
  • Dependency Scanning: Check for vulnerable dependencies
  • Network Segmentation: Isolate environments
  • Audit Logging: Log all pipeline activities
  • Regular Updates: Keep Jenkins and plugins updated

Conclusion

Building robust CI/CD pipelines with Jenkins and Docker enables teams to deliver software faster and more reliably. Key takeaways:

  • Automation: Automate build, test, and deployment processes
  • Docker: Containerize applications for consistency across environments
  • Jenkins: Orchestrate CI/CD workflows with declarative pipelines
  • Testing: Implement comprehensive automated testing strategies
  • Security: Integrate security scanning and secrets management
  • Monitoring: Track pipeline metrics and application health
  • Deployment: Use progressive deployment strategies (blue-green, canary)

Start with simple pipelines and gradually add complexity as your team matures in DevOps practices.

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About Ramesh Sundararamaiah

Red Hat Certified Architect

Expert in Linux system administration, DevOps automation, and cloud infrastructure. Specializing in Red Hat Enterprise Linux, CentOS, Ubuntu, Docker, Ansible, and enterprise IT solutions.

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