CI-CD Jenkinsfile

AniketNote.txt

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+1️⃣ Install Java 17 (Amazon Linux)
+
+yum update -y
+yum install java-17 -y
+java -version
+yum install git -y
+
+Install Nginx :  
+yum install nginx -y
+systemctl enable nginx
+systemctl start nginx
+
+Make Some changes in the File by using following commands and Set Permissions :
+
+# 1️⃣ Go to Nginx web root
+cd /usr/share/nginx/html
+
+# 2️⃣ Copy actual web files from WebContent to root
+sudo cp -r WebContent/* /usr/share/nginx/html/
+
+# 3️⃣ Fix ownership so Nginx can read the files
+sudo chown -R nginx:nginx /usr/share/nginx/html
+
+# 4️⃣ Fix permissions so files are readable by everyone
+sudo chmod -R 755 /usr/share/nginx/html
+
+# 5️⃣ Restart Nginx to apply changes
+sudo systemctl restart nginx
+
+# 6️⃣ Verify the files and permissions
+ls -l /usr/share/nginx/html
+
+
+
+2️⃣ Jenkins Installation (no changes)     or    Use Jenkins.war  file on apache tomcat
+
+sudo wget -O /etc/yum.repos.d/jenkins.repo https://pkg.jenkins.io/redhat-stable/jenkins.repo
+sudo rpm --import https://pkg.jenkins.io/redhat-stable/jenkins.io.key
+sudo yum install -y jenkins
+sudo systemctl enable jenkins
+sudo systemctl start jenkins
+sudo systemctl status jenkins
+
+3️⃣ Nginx, Git, curl
+
+sudo amazon-linux-extras enable nginx1
+sudo yum install -y nginx git curl
+sudo systemctl enable nginx
+sudo systemctl start nginx
+
+4️⃣ Jenkins sudo privileges
+
+sudo visudo
+
+Add:
+jenkins ALL=(ALL) NOPASSWD: ALL
+
+
+5️⃣ CI Pipeline Setup (Jenkins)
+
+Steps for CI (Compile / Build / Test):
+Create a new Jenkins job → Name it Train-Ticket-CI → Type: Pipeline
+Pipeline configuration → Pipeline script from SCM
+SCM: Git
+Repository URL: https://github.com/Wakekar/Train-Ticket-Reservation-System.git
+Branch: main
+Script Path: Jenkinsfile (your CI Jenkinsfile)
+
+
+5️⃣ CD Deployment Permissions
+
+sudo chown -R nginx:nginx /usr/share/nginx/html
+sudo chmod -R 755 /usr/share/nginx/html
+sudo systemctl restart nginx
+
+6️⃣ CD Jenkinsfile (Amazon Linux, Java 17 compatible)
+
+7️⃣ CD Pipeline Setup (Jenkins)
+
+Steps:
+
+Create a new Jenkins job → Name it Train-Ticket-CD → Type: Pipeline
+Pipeline configuration → Pipeline script from SCM
+SCM: Git
+Repository URL: https://github.com/Wakekar/Train-Ticket-Reservation-System.git
+Branch: main
+Script Path: Jenkinsfile-cd
+
+8️⃣ Optional: Trigger CD from CI
+
+At the end of your CI Jenkinsfile:
+
+stage('Trigger CD') {
+    steps {
+        build job: 'Train-Ticket-CD', wait: true
+    }
+}
+

Dockerfile

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+FROM amazoncorretto:17
+
+WORKDIR /app
+
+COPY target/*.war app.war
+
+EXPOSE 8080
+
+ENTRYPOINT ["java","-war","app.war"]

Jenkinsfile

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+pipeline {
+    agent any
+
+    tools {
+        jdk 'java'   // must match JDK name in Manage Jenkins → Tools
+    }
+
+    stages {
+
+        stage('Checkout Source Code') {
+            steps {
+                // Jenkins automatically checks out the branch where Jenkinsfile exists
+                echo "Source code checked out successfully"
+            }
+        }
+
+        stage('Verify Java') {
+            steps {
+                sh '''
+                    echo "JAVA_HOME=$JAVA_HOME"
+                    java -version
+                '''
+            }
+        }
+
+        stage('Build') {
+            steps {
+                echo "Build stage goes here"
+                // Example (uncomment if using Maven):
+                // sh 'mvn clean package'
+            }
+        }
+    }
+
+    post {
+        success {
+            echo '✅ Pipeline executed successfully'
+        }
+        failure {
+            echo '❌ Pipeline failed'
+        }
+    }
+}

Jenkinsfile-Combine

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+pipeline {
+    agent any
+
+    tools {
+        jdk 'java'
+    }
+
+    stages {
+
+        // Stage: Install kubectl
+        stage('Install kubectl') {
+            steps {
+                sh '''
+                    curl -LO "https://dl.k8s.io/release/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/amd64/kubectl"
+                    chmod +x kubectl
+                    sudo mv kubectl /usr/local/bin/
+                    kubectl version --client
+                '''
+            }
+        }
+
+        // Stage: Checkout Source Code
+        stage('Checkout Source Code') {
+            steps {
+                echo "Cloning repository..."
+                git url: 'https://github.com/Wakekar/Train-Ticket-Reservation-System.git', branch: 'master'
+            }
+        }
+
+        // Stage: Verify Java
+        stage('Verify Java') {
+            steps {
+                sh '''
+                    echo "JAVA_HOME=$JAVA_HOME"
+                    java -version
+                '''
+            }
+        }
+
+        // Stage: Build
+        stage('Build') {
+            steps {
+                echo "Build stage goes here"
+            }
+        }
+
+        // Stage: Deploy to Kubernetes
+        stage('Deploy to Kubernetes') {
+            steps {
+                echo "Deploying application to Kubernetes..."
+                sh '''
+                    kubectl apply -f train-ticket-app.yaml
+                    kubectl rollout status deployment/train-ticket-app
+                '''
+            }
+        }
+
+        // Stage: Verify Deployment
+        stage('Verify Deployment') {
+            steps {
+                sh '''
+                    kubectl get pods
+                    kubectl get svc
+                '''
+            }
+        }
+    }
+
+    post {
+        success {
+            echo '✅ Pipeline executed successfully'
+        }
+        failure {
+            echo '❌ Pipeline failed'
+        }
+    }
+}

Jenkinsfile-cd

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+pipeline {
+    agent any
+
+    stages {
+
+        stage('Checkout Source Code') {
+            steps {
+                echo "Cloning repository..."
+                git url: 'https://github.com/Wakekar/Train-Ticket-Reservation-System.git', branch: 'master'
+            }
+        }
+
+        stage('Deploy to Kubernetes') {
+            steps {
+                echo "Deploying application to Kubernetes..."
+                sh '''
+                kubectl apply -f train-ticket-app.yaml
+                kubectl rollout status deployment/train-ticket-app
+                '''
+            }
+        }
+
+        stage('Verify Deployment') {
+            steps {
+                sh '''
+                kubectl get pods
+                kubectl get svc
+                '''
+            }
+        }
+    }
+
+    post {
+        success {
+            echo "✅ Application successfully deployed to Kubernetes"
+        }
+        failure {
+            echo "❌ Kubernetes deployment failed"
+        }
+    }
+}

train-ticket-app.yaml

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+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: train-ticket-app
+spec:
+  replicas: 2
+  selector:
+    matchLabels:
+      app: train-ticket-app
+  template:
+    metadata:
+      labels:
+        app: train-ticket-app
+    spec:
+      containers:
+      - name: train-ticket-app
+        image: <dockerhub-username>/train-ticket-app:latest
+        imagePullPolicy: Always
+        ports:
+        - containerPort: 8080
+        resources:
+          requests:
+            memory: "256Mi"
+            cpu: "250m"
+          limits:
+            memory: "512Mi"
+            cpu: "500m"
+
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: train-ticket-app-service
+spec:
+  type: NodePort
+  selector:
+    app: train-ticket-app
+  ports:
+    - port: 8080
+      targetPort: 8080
+      nodePort: 30080