🚀 DevOps End-to-End CI/CD Pipeline with GitOps (ArgoCD + Terraform)

Shashi Vashisht
DevOps Engineer | Linux | Kubernetes | Automation

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📌 Project Overview

This project demonstrates a production-grade DevOps pipeline implementing:

• ✅ CI/CD using GitHub Actions
• ✅ Docker-based application delivery
• ✅ GitOps deployment model
• ✅ Kubernetes orchestration
• ✅ ArgoCD for continuous deployment
• ✅ Terraform for infrastructure provisioning

This architecture reflects real-world enterprise DevOps practices.

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🏗️ Architecture

Developer → GitHub → CI (Build/Test) → DockerHub
        → CD updates GitOps Repo → ArgoCD → Kubernetes Cluster

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⚙️ Tech Stack

Category	Tools Used
CI/CD	GitHub Actions
Containerization	Docker
Orchestration	Kubernetes
GitOps	ArgoCD
IaC	Terraform
Backend App	Python (Flask)

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📁 Repository Structure

.
├── app/                      # Flask application
├── Dockerfile               # Container build
├── requirements.txt         # Python dependencies
├── .github/workflows/       # CI/CD pipelines
├── assets/                  # Images (profile, diagrams)
└── README.md

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🔄 CI/CD Workflow Explained

🔹 Continuous Integration (CI)

Triggered on every push:

• Code checkout
• Build Docker image
• Tag image using commit SHA
• Push image to DockerHub

docker build -t <username>/demo-app:${{ github.sha }}
docker push <username>/demo-app:${{ github.sha }}

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🔹 Continuous Deployment (CD - GitOps)

Instead of deploying directly:

1. CI updates GitOps repository
2. ArgoCD detects changes
3. Automatically syncs with Kubernetes

👉 This ensures:

• Declarative deployments
• Version-controlled infrastructure
• Easy rollback capability

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🚀 Application Details

Endpoints

Endpoint	Description
/	Health check
/version	App version

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🐳 Running Locally

Build Docker Image

docker build -t demo-app .

Run Container

docker run -p 5000:5000 demo-app

Access:

http://localhost:5000

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☸️ Kubernetes Deployment (GitOps)

Deployment is handled via:

• GitOps repo (separate)
• ArgoCD Application
• Kubernetes manifests

Example:

image: your-docker/demo-app:<commit-sha>

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🌍 Terraform (Infrastructure)

Infrastructure provisioning includes:

• Compute resources (EC2 / K8s nodes)
• Networking (VPC, subnets)
• IAM roles

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🔐 Secrets Management

Handled via GitHub Secrets:

• DOCKER_USERNAME
• DOCKER_PASSWORD

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📊 Key DevOps Concepts Demonstrated

• GitOps (ArgoCD)
• Immutable deployments
• CI/CD pipeline design
• Infrastructure as Code (Terraform)
• Container lifecycle management
• Separation of concerns (App vs Infra vs GitOps)

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🧠 Interview Explanation (Use This)

“I implemented a GitOps-based CI/CD pipeline where GitHub Actions builds Docker images, pushes them to DockerHub, updates a GitOps repository, and ArgoCD handles automated deployment to Kubernetes with self-healing enabled.”

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🚀 Future Enhancements

• Helm charts for templating
• Multi-environment setup (dev/stage/prod)
• Prometheus + Grafana monitoring
• GitHub OIDC (no static secrets)
• ArgoCD RBAC & Projects
• Canary deployments

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📸 Screenshots (Optional)

Add:

• ArgoCD dashboard
• Pipeline execution
• Kubernetes pods

Place inside:

assets/screenshots/

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🤝 Connect With Me

• GitHub: https://github.com/your-username
• LinkedIn: https://linkedin.com/in/your-profile

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⭐ If you like this project

Give it a ⭐ on GitHub — it helps a lot!

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