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Example code of highperapp/zero-downtime

Informations about the package zero-downtime

HighPer Zero-Downtime Reload System

Complete zero-downtime deployment and hot reload system for HighPer Framework with WebSocket connection migration support across HTTP/1.1, HTTP/2 (RFC 8441), and HTTP/3 protocols.

🚀 Features

WebSocket Protocol Support

Zero-Downtime Strategies

Connection Migration

Request Buffering

📋 Installation

⚙️ Configuration

Environment Variables

🔧 Usage

Basic Integration

Service Provider Integration

The package includes a service provider for automatic integration:

Manual Component Usage

🌐 WebSocket Migration

HTTP/2 WebSocket (RFC 8441)

Connection State Serialization

🚦 Deployment Strategies

Blue-Green Deployment

  1. Start request queuing - Buffer incoming requests
  2. Serialize connections - Capture all WebSocket states
  3. Spawn green workers - New worker processes
  4. Transfer sockets - Hand off listening sockets
  5. Migrate connections - Restore WebSocket states
  6. Replay requests - Process buffered requests
  7. Terminate blue workers - Clean shutdown

Rolling Deployment

Individual worker replacement with minimal disruption:

Socket Handoff

Master process replacement with complete state transfer:

🏥 Health Monitoring

Health Check Endpoints

Statistics API

🧪 Testing

Run the comprehensive test suite:

Test Coverage

Unit Tests (43 tests)

Integration Tests

Performance Tests

Concurrency Tests

🎛️ Advanced Configuration

Custom Connection Migration

Request Priority Headers

Worker Auto-Restart

🔒 Security Considerations

Connection State Security

Socket Path Permissions

Request Buffer Limits

Worker Process Isolation

📊 Performance Metrics

Benchmarked Performance

Connection Migration Performance

Request Buffering Performance

Zero-Downtime Reload Metrics

Real-time Monitoring

🐛 Troubleshooting

Common Issues

Connection Migration Fails

Request Buffer Overflow

Worker Handoff Timeout

📚 API Reference

ZeroDowntimeBootstrap

ConnectionStateSerializer

ProxyRequestQueue

Response Formats

performZeroDowntimeReload() Response:

getHealthStatus() Response:

🤝 Contributing

  1. Fork the repository
  2. Create feature branch (git checkout -b feature/amazing-feature)
  3. Commit changes (git commit -m 'Add amazing feature')
  4. Push to branch (git push origin feature/amazing-feature)
  5. Open Pull Request

🔧 Requirements

📄 License

This package is open-sourced software licensed under the MIT license.

🙏 Acknowledgments

All versions of zero-downtime with dependencies

PHP Build Version
Package Version
Requires php Version ^8.3|^8.4
ext-pcntl Version *
ext-posix Version *
ext-sockets Version *
highperapp/websockets Version ^1.1
highperapp/compression Version ^1.0
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