Building an End-to-End CI/CD Pipeline with Spring Boot, Jenkins, Kubernetes & Security Scans

Building an End-to-End CI/CD Pipeline with Spring Boot, Jenkins, Kubernetes & Security Scans

A complete CI/CD pipeline was constructed, integrating Spring Boot, Jenkins, Kubernetes, and security scanning tools like SonarQube and Trivy, to automate software delivery. The project aimed to move beyond basic pipeline execution to encompass versioning, security, and robust deployment practices.

Real-world CI/CD systems often fall short of ideal models due to complexity in areas like versioning, security integration, and handling deployment failures; these gaps can lead to delayed releases, security vulnerabilities, and increased operational costs. This project addressed these challenges by building a fully automated system, emphasizing observability and reliability.

Key Insights

• Docker-in-Docker Permissions: Addressing permissions issues with /var/run/docker.sock is crucial for running Docker builds within Jenkins containers.
• Multi-stage Dockerfiles: Utilizing multi-stage builds results in smaller, more secure production images by separating build dependencies from runtime requirements.
• Dynamic Image Tagging: Replacing image placeholders with build numbers (${BUILD_NUMBER}) ensures Kubernetes rollouts occur with every code change.

Working Example

apiVersion: apps/v1
kind: Deployment
metadata:
  name: my-spring-boot-app
spec:
  replicas: 3
  selector:
    matchLabels:
      app: my-spring-boot-app
  template:
    metadata:
      labels:
        app: my-spring-boot-app
    spec:
      containers:
      - name: my-spring-boot-app
        image: your-dockerhub-username/my-spring-boot-app:${BUILD_NUMBER}
        ports:
        - containerPort: 8080

Practical Applications

• Stripe: Uses a similar pipeline for continuous deployment of its payment processing services, ensuring rapid iteration and feature delivery.
• Pitfall: Relying on :latest image tags in Kubernetes deployments can lead to unpredictable rollouts and difficulty in rollback scenarios.