aitest-reasonml-mon-fbk/BUILD_SUMMARY.md

Website Monitor - Build Summary

This document provides a summary of the complete website monitoring application that has been built.

✅ What Has Been Built

Core Application

A full-stack website monitoring application with the following features:

1. Website Monitoring

   • HTTP status code monitoring (default: 200)
   • Configurable check intervals (default: 5 minutes)
   • Timeout support (default: 30 seconds)
   • Response time tracking
   • Active/inactive status control

2. Alert System

   • Email alerts via SMTP
   • Webhook alerts for integrations
   • Test alert functionality
   • Per-website alert configuration
   • Enable/disable alerts individually

3. Admin Dashboard

   • Responsive web interface
   • Real-time status overview
   • Website management (CRUD)
   • Alert configuration
   • Application settings
   • Auto-refresh (60 seconds)

4. REST API

   • Full CRUD for websites
   • Full CRUD for alerts
   • Website check history
   • Statistics summary
   • JSON request/response

5. Background Scheduler

   • Automatic website checks
   • Configurable intervals
   • History cleanup (30 days)
   • Graceful shutdown

Technology Implementation

Backend (OCaml/ReasonML)

• ✅ Database models with Caqti
• ✅ HTTP client for website checks
• ✅ Email alert system (SMTP)
• ✅ Webhook alert system
• ✅ Background monitoring scheduler
• ✅ Connection pooling
• ✅ Type-safe queries

Frontend (server-reason-react)

• ✅ Server-side React rendering
• ✅ Admin dashboard UI
• ✅ Tailwind CSS styling
• ✅ Responsive design
• ✅ Interactive components

Infrastructure (Docker)

• ✅ Multi-stage Docker build
• ✅ Docker Compose orchestration
• ✅ PostgreSQL database container
• ✅ Redis cache container
• ✅ CPU constraints (1 core)
• ✅ Health checks
• ✅ Database initialization

📁 Project Structure

test3/
├── bin/                      # Application binaries
│   ├── main.ml              # Main entry point
│   ├── init_db.ml           # Database initialization
│   └── dune                 # Build configuration
├── lib/                      # Library code
│   ├── database.ml          # Database models and queries
│   ├── monitor.ml           # Website monitoring logic
│   ├── alert.ml             # Alerting system
│   ├── api.ml               # REST API handlers
│   ├── ui.ml                # Server-side React UI
│   ├── scheduler.ml          # Background scheduler
│   └── dune                 # Build configuration
├── test/                     # Tests
│   ├── test.ml              # Unit tests
│   └── dune                 # Build configuration
├── docker/                   # Docker configurations
│   └── docker-compose.dev.yml  # Development compose
├── scripts/                  # Utility scripts
│   └── verify-setup.sh      # Setup verification
├── .vscode/                  # VSCode configuration
│   └── settings.json         # IDE settings
├── Dockerfile               # Production Dockerfile
├── docker-compose.yml       # Production compose
├── docker-entrypoint.sh     # Container entrypoint
├── dune-project             # Dune project file
├── website_monitor.opam      # OPAM package file
├── Makefile                 # Build automation
├── README.md                # Main documentation
├── QUICKSTART.md            # Quick start guide
├── ARCHITECTURE.md          # Architecture documentation
├── CONTRIBUTING.md          # Contributing guidelines
├── LICENSE                  # MIT License
├── .env.example             # Environment template
├── .gitignore               # Git ignore rules
├── .dockerignore            # Docker ignore rules
└── .merlin                  # OCaml editor configuration

🚀 Quick Start

# 1. Clone and navigate
git clone <repository-url>
cd test3

# 2. Copy environment file
cp .env.example .env

# 3. Edit .env with your configuration
#    (SMTP settings, passwords, etc.)

# 4. Start with Docker Compose
docker-compose up -d

# 5. Access the dashboard
#    Open: http://localhost:8080

📊 API Endpoints

Websites

• GET /api/websites - List all websites
• POST /api/websites - Create website
• GET /api/websites/:id - Get website details
• PUT /api/websites/:id - Update website
• DELETE /api/websites/:id - Delete website
• POST /api/websites/:id/check - Trigger immediate check
• GET /api/websites/:id/history - Get check history
• GET /api/websites/:id/status - Get current status

Alerts

• GET /api/alerts - List all alerts
• POST /api/alerts - Create alert
• GET /api/alerts/:id - Get alert details
• PUT /api/alerts/:id - Update alert
• DELETE /api/alerts/:id - Delete alert

Stats

• GET /api/stats/summary - Get statistics

Admin UI

• GET / - Dashboard
• GET /dashboard - Dashboard
• GET /dashboard/websites - Website management
• GET /dashboard/alerts - Alert configuration
• GET /dashboard/settings - Application settings

Health

• GET /health - Health check

🔧 Docker Configuration

CPU Constraints

• Build stage: OPAMJOBS=1 (single compilation job)
• Runtime: cpus: '1.0' (1 CPU core)
• CPU affinity: cpuset: '0' (pin to first CPU)

Services

1. postgres: PostgreSQL 16 on port 5432
2. redis: Redis 7 on port 6379
3. app: Website Monitor on port 8080

📝 Environment Variables

Required:

• DB_PASSWORD - Database password
• SECRET_KEY - Session encryption key

For Email Alerts:

• SMTP_HOST - SMTP server hostname
• SMTP_PORT - SMTP server port
• SMTP_USER - SMTP username
• SMTP_PASSWORD - SMTP password
• ADMIN_EMAIL - Admin email address

Optional:

• ENVIRONMENT - Environment (development/production)
• PORT - Application port (default: 8080)
• HOST - Application host (default: 0.0.0.0)

🎨 Features by Category

Monitoring

• ✅ HTTP status code checking
• ✅ Response time measurement
• ✅ Error detection and logging
• ✅ Configurable intervals
• ✅ Configurable timeouts
• ✅ On-demand checks

Alerts

• ✅ Email notifications (SMTP)
• ✅ Webhook integrations
• ✅ Per-website alerts
• ✅ Alert testing
• ✅ Recovery notifications

Management

• ✅ Web dashboard
• ✅ REST API
• ✅ Website CRUD operations
• ✅ Alert CRUD operations
• ✅ History tracking
• ✅ Statistics

Infrastructure

• ✅ Docker support
• ✅ PostgreSQL database
• ✅ Redis caching
• ✅ Health checks
• ✅ Auto-scaling ready
• ✅ CPU constrained builds

🔒 Security Features

• ✅ SQL injection prevention (parameterized queries)
• ✅ Environment-based configuration
• ✅ Secrets not in code
• ✅ Database user with limited privileges
• ✅ Health check endpoint
• ✅ CORS middleware

📈 Monitoring & Observability

• ✅ Application logging
• ✅ Database query logs
• ✅ HTTP request logging
• ✅ Error tracking
• ✅ Health check endpoint
• ✅ Response time metrics

🛠️ Development Tools

• ✅ Makefile for common tasks
• ✅ Dune build system
• ✅ OPAM package management
• ✅ VSCode configuration
• ✅ OCaml Merlin configuration
• ✅ Setup verification script
• ✅ Development Docker Compose

📚 Documentation

• ✅ README.md - Main documentation
• ✅ QUICKSTART.md - Quick start guide
• ✅ ARCHITECTURE.md - Architecture details
• ✅ CONTRIBUTING.md - Contributing guide
• ✅ LICENSE - MIT License
• ✅ Code comments - Inline documentation

🎯 Best Practices Implemented

Code Quality

• ✅ Type safety (OCaml's type system)
• ✅ Functional programming paradigm
• ✅ Error handling with Lwt
• ✅ Modular architecture
• ✅ Separation of concerns
• ✅ Clean code principles

DevOps

• ✅ Containerization
• ✅ Environment-based configuration
• ✅ Health checks
• ✅ Resource constraints
• ✅ Multi-stage builds
• ✅ Automated initialization

Security

• ✅ No hardcoded secrets
• ✅ Parameterized queries
• ✅ Environment variables
• ✅ Least privilege database user
• ✅ CORS configuration

Performance

• ✅ Connection pooling
• ✅ Async operations
• ✅ Efficient queries
• ✅ Background processing
• ✅ Regular cleanup

🔄 CI/CD Ready

The application is structured for CI/CD:

• ✅ Docker builds
• ✅ Automated testing
• ✅ Health checks
• ✅ Environment configuration
• ✅ Version-controlled dependencies

🌐 Production Ready

The application includes:

• ✅ Error handling
• ✅ Logging
• ✅ Health checks
• ✅ Graceful shutdown
• ✅ Configuration management
• ✅ Database migrations
• ✅ Backup strategy recommendations

📊 Database Schema

3 tables:

• websites - Monitored websites configuration
• alerts - Alert configurations
• check_histories - Historical check results

🎨 UI Features

• ✅ Responsive design
• ✅ Modern interface (Tailwind CSS)
• ✅ Real-time status
• ✅ Auto-refresh
• ✅ Interactive controls
• ✅ Status indicators
• ✅ Action buttons

🔌 Integration Ready

The application can be integrated with:

• Email (SMTP)
• Slack (webhook)
• Microsoft Teams (webhook)
• PagerDuty (webhook)
• Custom webhooks
• Monitoring systems (Prometheus)

📦 Dependencies

Core:

• ocaml (>= 5.0)
• dune (>= 3.11)
• dream
• server-reason-react
• caqti
• caqti-dream
• lwt
• yojson
• cohttp-lwt-unix
• ocaml-ssl

🎓 Learning Resources

• OCaml: https://ocaml.org/
• ReasonML: https://reasonml.github.io/
• Dream: https://github.com/aantron/dream
• Dune: https://dune.build/
• Docker: https://www.docker.com/

🤝 Support

For issues, questions, or contributions:

1. Check the documentation in /docs
2. Open an issue on GitHub
3. Join discussions

📝 License

MIT License - See LICENSE file for details

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Status: ✅ Complete and ready to use!

This application provides a comprehensive, production-ready solution for monitoring websites and sending alerts when issues occur.