# harbor-ci-cd-demo

Learning Harbor + Gitea Actions CI/CD integration

# 🖥️ System Monitoring Dashboard

A comprehensive Node.js application for real-time system monitoring with a beautiful web dashboard. Built to demonstrate Harbor CI/CD integration with Gitea Actions.

## ✨ Features

- **🚀 Real-time System Monitoring**: CPU, memory, disk usage, and load averages
- **📊 Interactive Dashboard**: Beautiful, responsive web interface with live data
- **🔍 Health Checks**: Kubernetes-style readiness and liveness probes
- **📡 REST API**: Complete API for system metrics and monitoring data
- **🧪 Comprehensive Testing**: Unit tests with coverage reporting
- **🔒 Security**: Helmet.js security headers, input validation
- **📈 Metrics Collection**: Request tracking, response times, error rates
- **🐳 Container Ready**: Optimized Docker configuration
- **⚡ Production Ready**: Proper error handling, logging, and monitoring

## 🚀 Quick Start

### Prerequisites
- Node.js 18+
- Docker (optional)
- Git

### Local Development

```bash
# Clone the repository
git clone https://git.maverickapplications.com/[username]/harbor-ci-cd-demo.git
cd harbor-ci-cd-demo

# Install dependencies
npm install

# Start development server
npm run dev

# Open your browser
open http://localhost:3000
```

### Using Docker

```bash
# Build and run with Docker
docker build -t monitoring-dashboard .
docker run -p 3000:3000 monitoring-dashboard

# Or use Docker Compose
docker-compose up
```

## 📚 API Documentation

### System Information
- **GET /api/system** - System hardware and OS information
- **GET /api/memory** - Memory usage statistics
- **GET /api/process** - Node.js process information
- **GET /api/metrics** - Application metrics and counters

### Health Checks
- **GET /health** - Basic health status
- **GET /health/detailed** - Comprehensive health information
- **GET /health/ready** - Readiness probe (Kubernetes compatible)
- **GET /health/live** - Liveness probe (Kubernetes compatible)

### Testing
- **GET /api/test** - API connectivity test endpoint

## 🧪 Testing

```bash
# Run all tests
npm test

# Run tests with coverage
npm run test:coverage

# Run tests in watch mode
npm run test:watch

# Run linting
npm run lint

# Fix linting issues
npm run lint:fix
```

## 📊 Dashboard Features

### System Overview
- Hostname, platform, and architecture
- CPU cores and load averages
- Total system memory
- System uptime
- Node.js version information

### Memory Monitoring
- System memory usage with visual bars
- Process heap memory tracking
- RSS and external memory statistics
- Warning indicators for high usage

### Health Status
- Overall system health indicator
- Memory status monitoring
- Process uptime tracking
- Environment information

### API Metrics
- Request counters by endpoint
- Average response times
- Service uptime tracking
- Real-time performance data

### Process Information
- Process ID and parent process
- Working directory
- Node.js version details
- Environment configuration

## 🔧 Configuration

### Environment Variables

```bash
PORT=3000                    # Server port (default: 3000)
NODE_ENV=production         # Environment mode
```

### Docker Environment

```dockerfile
ENV NODE_ENV=production
ENV PORT=3000
EXPOSE 3000
```

## 🐳 Container Deployment

### Building the Image

```bash
# Build locally
docker build -t monitoring-dashboard:latest .

# Build for Harbor registry
docker build -t registry.maverickapplications.com/infrastructure/monitoring-dashboard:latest .
```

### Running in Production

```bash
# Run with resource limits
docker run -d \
  --name monitoring-dashboard \
  --memory=512m \
  --cpus=1 \
  -p 3000:3000 \
  -e NODE_ENV=production \
  --restart=unless-stopped \
  monitoring-dashboard:latest
```

## 🔄 CI/CD Pipeline

This application includes a complete CI/CD pipeline with:

- **🧪 Automated Testing**: Unit tests and coverage reporting
- **🔒 Security Scanning**: npm audit and vulnerability checks
- **🏗️ Multi-platform Builds**: AMD64 and ARM64 support
- **📦 Harbor Integration**: Automatic image building and pushing
- **🛡️ Vulnerability Scanning**: Trivy security scanning
- **🚀 Automated Deployment**: Environment-based deployment
- **📋 SBOM Generation**: Software Bill of Materials

### Pipeline Stages

1. **Test & Lint** - Code quality and functionality validation
2. **Security Scan** - Dependency vulnerability checking
3. **Build & Push** - Multi-platform Docker image creation
4. **Image Scan** - Container vulnerability assessment
5. **Deploy** - Environment-specific deployment
6. **Cleanup** - Resource management

## 📈 Monitoring & Observability

### Health Check Endpoints

```bash
# Basic health check
curl http://localhost:3000/health

# Detailed health information
curl http://localhost:3000/health/detailed

# Kubernetes readiness probe
curl http://localhost:3000/health/ready

# Kubernetes liveness probe
curl http://localhost:3000/health/live
```

### Metrics Collection

The application automatically tracks:
- HTTP request counters
- Response time histograms
- Error rate monitoring
- Memory usage patterns
- System resource utilization

### Dashboard Access

- **Main Dashboard**: http://localhost:3000
- **API Documentation**: http://localhost:3000/api
- **Health Status**: http://localhost:3000/health/detailed

## 🛠️ Development

### Project Structure

```
harbor-ci-cd-demo/
├── .gitea/workflows/       # CI/CD pipeline configuration
├── src/                    # Application source code
│   ├── routes/            # API route handlers
│   ├── middleware/        # Custom middleware
│   ├── utils/            # Utility functions
│   └── public/           # Frontend assets
├── tests/                 # Test suites
├── Dockerfile            # Container configuration
├── docker-compose.yml    # Local development setup
└── package.json          # Node.js configuration
```

### Adding New Features

1. **API Endpoints**: Add routes in `src/routes/`
2. **Middleware**: Create middleware in `src/middleware/`
3. **Tests**: Add tests in `tests/` directory
4. **Frontend**: Update dashboard in `src/public/`

### Code Style

- ESLint configuration with recommended rules
- Prettier formatting (optional)
- Jest testing framework
- Security-first approach

## 🔒 Security Features

- **Helmet.js**: Security headers and protections
- **CORS**: Cross-origin resource sharing control
- **Input Validation**: Request data validation
- **Error Handling**: Secure error responses
- **Health Checks**: System monitoring capabilities
- **Container Security**: Non-root user execution

## 📖 Learn More

This application demonstrates:
- **Modern Node.js Development**: ES6+, async/await, modules
- **RESTful API Design**: Resource-based endpoints
- **Real-time Monitoring**: Live system metrics
- **Container Best Practices**: Multi-stage builds, security
- **CI/CD Integration**: Automated testing and deployment
- **Production Readiness**: Logging, monitoring, health checks

## 🤝 Contributing

1. Fork the repository
2. Create a feature branch
3. Add tests for new functionality
4. Ensure all tests pass
5. Submit a pull request

## 📄 License

MIT License - see LICENSE file for details

---

**Built with ❤️ for Harbor CI/CD Demo**

This application showcases enterprise-grade Node.js development with comprehensive monitoring, testing, and deployment automation.