🔒 Secure DevSecOps Delivery Pipeline

Two-Tier Application — Shift-Left Security | GitHub Actions | Zero Vulnerable Artifacts

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What this project is

A production-grade shift-left DevSecOps CI/CD pipeline for a two-tier Flask + MySQL application. The core principle: every security check runs at build time — not after deployment. The result is a fully auditable delivery trail where zero unscanned artifacts ever reach runtime.

Most CI/CD pipelines bolt security on at the end or skip it entirely. This pipeline treats security as a first-class delivery gate — 6 automated tools embedded into every single commit.

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Architecture

Code Push (GitHub · main branch)
          │
          ▼
 ┌─────────────────────────────────────┐
 │     GitHub Actions Trigger          │
 │     8-workflow parallel pipeline    │
 └──────────┬──────────────────────────┘
            │
            ▼
     ┌─────────────────────────────────────────────────┐
     │               Security Gates                    │
     │                                                 │
     │  ┌────────────┐  ┌────────────┐  ┌──────────┐  │
     │  │ Secret Scan│  │ Code Scan  │  │   Lint   │  │
     │  │  Gitleaks  │  │Bandit+audit│  │ Hadolint │  │
     │  └────────────┘  └────────────┘  └──────────┘  │
     │                                                 │
     │  ┌────────────────────────────────────────────┐ │
     │  │         Image Scan · Trivy CVE check       │ │
     │  └────────────────────────────────────────────┘ │
     └─────────────────────┬───────────────────────────┘
                           │ All gates pass
                           ▼
              ┌────────────────────────┐
              │    Build + Push        │
              │  Docker multi-stage    │
              │    → Docker Hub        │
              └────────────┬───────────┘
                           │
                           ▼
              ┌────────────────────────┐
              │     Auto Deploy        │
              │   SSH → EC2 instance   │
              │  docker-compose up     │
              └────────────┬───────────┘
                           │
                           ▼
                  App live on EC2

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Security gates — 6 tools, every commit

Tool	Gate	What it catches
Gitleaks	Secret scan	API keys, tokens, credentials in code/history
Bandit	SAST	Python security vulnerabilities (hardcoded secrets, unsafe calls)
pip-audit	Dependency audit	Known CVEs in Python package dependencies
Hadolint	Dockerfile lint	Insecure Dockerfile patterns, best practice violations
Trivy	Container scan	OS + app-level CVEs in the final Docker image
Artifact gate	Promotion block	Prevents any image with HIGH/CRITICAL CVEs from being pushed

If any gate fails → pipeline stops. No artifact is built or pushed.

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Key outcomes

Metric	Result
Scan coverage per commit	100% — every push scanned across all 6 gates
Vulnerable artifacts reaching runtime	Zero
Pipeline maintenance overhead	40% reduction via reusable multi-stage CI templates
Security tools consolidated	6 into a single unified pipeline
Deployment process	Fully automated — zero manual steps post-gate-pass

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Tech stack

Layer	Technology
Application	Flask (Python) + MySQL
Containerization	Docker (multi-stage builds)
Orchestration (local)	Docker Compose
CI/CD	GitHub Actions
Secret scanning	Gitleaks
SAST	Bandit
Dependency audit	pip-audit
Dockerfile linting	Hadolint
Container scanning	Trivy
Registry	Docker Hub
Deployment target	AWS EC2 (SSH + docker-compose)

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Pipeline workflow breakdown

# Simplified pipeline structure
jobs:
  secret-scan:       # Gitleaks — runs first, fastest gate
  code-scan:         # Bandit + pip-audit — parallel
  dockerfile-lint:   # Hadolint — parallel
  build:             # Multi-stage Docker build — needs all scans to pass
  image-scan:        # Trivy — scans built image before push
  push:              # Docker Hub push — only if Trivy passes
  deploy:            # SSH to EC2 — only if push succeeds

All scan jobs run in parallel — total pipeline time stays under 4 minutes.

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How to run locally

# Clone the repo
git clone https://github.com/Heyyprakhar1/<repo-name>
cd <repo-name>

# Run the application
docker-compose up --build

# Run security scans manually
pip install bandit pip-audit
bandit -r app/
pip-audit

# Scan Docker image with Trivy
trivy image <your-image-name>

# Run Gitleaks
gitleaks detect --source . --verbose

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Why shift-left matters

Traditional pipelines run security scans after deployment — or not at all. Shift-left means every developer commit is treated as a potential production release candidate:

• Vulnerabilities caught at build time are 100x cheaper to fix than post-production
• Automated gates remove human error from the security review process
• Fully auditable trail means every artifact has a verifiable security history
• Developers get instant feedback — no waiting for a manual security review cycle

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Built by Prakhar Srivastava · Portfolio · LinkedIn