DevSecOps: Security-First CI/CD Pipelines with Jenkins and Kubernetes

Security can't be an afterthought. In modern software delivery, it needs to be baked into every stage of the pipeline. Here's how I built a DevSecOps pipeline for my Netflix clone project. The Pipeline 1. Source → Jenkins picks up changes from GitHub 2. Build → Docker image built with multi-stage builds 3. Scan → SonarQube for code quality, Trivy for container vulnerabilities 4. Quality Gate → Build blocked if critical issues found 5. Deploy → Helm chart deploys to Kubernetes on AWS EC2 6. GitOps → ArgoCD ensures cluster state matches Git 7. Monitor → Prometheus + Grafana for real-time observability Results - Blocked 15+ vulnerabilities before they reached production - Automated rollbacks on failed health checks - Full observability with custom Grafana dashboards - Zero-downtime deployments via rolling updates The key insight: security scanning at build time is 100x cheaper than fixing vulnerabilities in production.