waylume_server/TODO.md

# Waylume Server Node - Production Readiness TODO

## Self-Managing Node Infrastructure
- [x] Automatic server registration in `waylume_servers` table
- [x] Continuous heartbeat monitoring and health reporting
- [x] Geolocation integration for client server selection
- [x] Zero-touch deployment with Docker
- [x] Self-recovery for WireGuard interface failures
- [x] Resource management and peer lifecycle automation
- [ ] **HIGH PRIORITY**: Implement server load balancing registration
- [ ] **HIGH PRIORITY**: Add automatic failover mechanisms
- [ ] Multi-region deployment coordination
- [ ] Server capacity monitoring and reporting
- [ ] Automatic scaling triggers based on load

## WireGuard Management (Core Service)
- [x] WireGuard interface initialization (`wg0` on `10.0.0.1/24`)
- [x] Dynamic peer creation with unique keys and IP assignments
- [x] Peer isolation enforcement (iptables rules)
- [x] Traffic control implementation (HTB-based speed limiting)
- [x] Data quota enforcement (iptables quota management)
- [x] Automatic peer cleanup and configuration removal
- [x] IP subnet management (`10.0.0.2` - `10.255.255.254`)
- [ ] **MEDIUM PRIORITY**: WireGuard interface health monitoring
- [ ] Peer connection quality metrics
- [ ] Advanced traffic shaping policies
- [ ] Network performance optimization

## Internal API Endpoints (Supabase Edge Functions Only)
- [x] POST /api/peers (called by `connection-request` edge function)
- [x] POST /api/peers/delete (called by session cleanup processes)
- [x] POST /api/peers/speed-limit (called by subscription management)
- [x] POST /api/peers/data-cap (called by usage monitoring systems)
- [x] Basic error handling with HTTP status codes
- [x] JSON request/response handling
- [x] Input validation for required parameters
- [ ] **MEDIUM PRIORITY**: GET /api/peers (for internal monitoring)
- [ ] **MEDIUM PRIORITY**: GET /api/peers/{id} (for session management)
- [ ] **LOW PRIORITY**: Add pagination for peer listings
- [ ] Server health endpoints for load balancer integration
- [ ] Internal metrics endpoints for monitoring systems
- [ ] Peer connection quality reporting endpoints
- [ ] **LOW PRIORITY**: API versioning strategy
- [ ] **LOW PRIORITY**: OpenAPI documentation for internal APIs

## Supabase Edge Functions Integration
- [x] Integration with `connection-request` function for peer creation
- [x] Session tracking through `vpn_sessions` table
- [x] Configuration delivery through Supabase to Flutter clients
- [x] Server registration in `waylume_servers` table for `vpn-nodes-list`
- [ ] **HIGH PRIORITY**: Implement proper edge function authentication
- [ ] **HIGH PRIORITY**: Add request validation from edge functions
- [ ] **MEDIUM PRIORITY**: Implement edge function request signing
- [ ] Circuit breaker for Supabase connectivity issues
- [ ] Retry logic for failed edge function communications
- [ ] Edge function timeout handling
- [ ] Rate limiting coordination with edge functions

## Ecosystem Integration (Flutter Client & Supabase)
- [x] Server discovery through `vpn-nodes-list` edge function
- [x] Geolocation data provision for Flutter map interface
- [x] VPN session creation workflow with client
- [x] Heartbeat system for server availability status
- [ ] **MEDIUM PRIORITY**: Integration with subscription management (speed-limit/data-cap)
- [ ] **MEDIUM PRIORITY**: Support for Stripe-driven service tier enforcement
- [ ] **LOW PRIORITY**: Real-time connection status updates to client
- [ ] **LOW PRIORITY**: Usage analytics reporting for client dashboard
- [ ] Support for payment history and account management flows
- [ ] Integration with trial period and subscription state changes

## Security & Network Isolation
- [x] Port 3000 restricted to internal access (no direct client access)
- [x] Peer isolation through iptables rules
- [x] WireGuard peer-to-peer communication prevention
- [ ] **HIGH PRIORITY**: Network firewall rules for Supabase-only access
- [ ] **HIGH PRIORITY**: Implement secure communication with edge functions
- [ ] **MEDIUM PRIORITY**: Add request origin validation
- [ ] Security audit of iptables rules and WireGuard configuration
- [ ] Implement secure key storage and rotation
- [ ] Network segmentation for additional security
- [ ] Intrusion detection for API access patterns

## Monitoring & Observability
- [x] Basic request logging with timestamps
- [x] Client IP and user agent tracking
- [x] VPN session monitoring and health checks
- [x] Connection status detection (alive/dead peers)
- [ ] **HIGH PRIORITY**: Add comprehensive health check endpoints for load balancers
- [ ] Implement metrics collection (Prometheus/OpenTelemetry)
- [ ] Add structured logging with log levels
- [ ] Monitor WireGuard interface status
- [ ] Track peer connection metrics and analytics
- [ ] Implement alerting for server issues
- [ ] Add distributed tracing support
- [ ] Resource usage monitoring (CPU, memory, network)

## Error Handling & Resilience
- [x] Basic API error responses
- [x] Process error handling for system commands
- [x] Graceful degradation for missing WireGuard tools
- [ ] **HIGH PRIORITY**: Implement graceful shutdown handling
- [ ] Add retry logic for Supabase operations
- [ ] Improve error responses with more detailed messages
- [ ] Add circuit breaker pattern for external dependencies
- [ ] Implement backup/recovery procedures
- [ ] Handle WireGuard interface failures
- [ ] Add database connection pooling and failover

## Configuration Management
- [x] Environment variable support (.env files)
- [x] Docker environment configuration
- [x] Supabase client configuration
- [x] Automatic environment detection
- [ ] **MEDIUM PRIORITY**: Configuration validation on startup
- [ ] Move hardcoded values to configuration files
- [ ] Add environment-specific configurations
- [ ] Add support for configuration hot-reloading
- [ ] Document all environment variables
- [ ] Add configuration templates for different deployments

## Docker & Infrastructure
- [x] Complete Docker setup with WireGuard tools
- [x] Network capabilities (NET_ADMIN) configuration
- [x] Device access (/dev/net/tun) mapping
- [x] Port mapping (API 3000, WireGuard 51820)
- [x] Volume mounting for WireGuard runtime
- [x] Restart policy configuration
- [ ] Multi-stage Docker builds for smaller images
- [ ] Add Kubernetes deployment manifests
- [ ] Implement blue-green deployment strategy
- [ ] Container security scanning in CI/CD
- [ ] Infrastructure as code (Terraform/CloudFormation)
- [ ] Multi-region deployment support

## Performance & Scalability
- [x] Efficient peer creation/deletion operations
- [x] Optimized traffic control implementation
- [ ] Implement connection pooling for database operations
- [ ] Add caching layer for frequently accessed data
- [ ] Load testing and performance benchmarking
- [ ] Implement horizontal scaling strategies
- [ ] Optimize memory usage and garbage collection
- [ ] Performance monitoring and profiling

## Testing & Quality Assurance
- [x] Basic API endpoint testing script
- [x] End-to-end workflow testing
- [x] Response validation testing
- [ ] Add unit tests for all services
- [ ] Implement integration tests
- [ ] Add automated testing in CI/CD pipeline
- [ ] Load testing for concurrent connections
- [ ] Security penetration testing
- [ ] Performance regression testing

## Data Management
- [x] Session monitoring and peer tracking
- [ ] Implement persistent peer data storage
- [ ] Add peer usage analytics and reporting
- [ ] Implement data retention policies
- [ ] Add data backup and recovery procedures
- [ ] Implement audit logging for compliance
- [ ] Add peer lifecycle management

## Documentation & Compliance
- [x] Comprehensive README with API examples
- [x] Docker deployment instructions
- [x] Network architecture documentation
- [ ] Add deployment guides for different platforms
- [ ] Create troubleshooting documentation
- [ ] Add detailed API documentation with examples
- [ ] Document security best practices
- [ ] Add compliance documentation (GDPR, etc.)
- [ ] Create operational runbooks

## High Priority for Production (Self-Managing Node)
1. **🔴 CRITICAL**: Edge function authentication and request validation
2. **🔴 CRITICAL**: Network firewall rules (Supabase-only access)
3. **🔴 CRITICAL**: Server load balancing and failover mechanisms
4. **🟡 HIGH**: Health check endpoints for load balancers
5. **🟡 HIGH**: Graceful shutdown and recovery handling
6. **🟡 HIGH**: Comprehensive monitoring and alerting
7. **🟡 HIGH**: Automated scaling triggers
8. **🟡 HIGH**: Circuit breaker for Supabase connectivity

## Current Status Summary (Waylume Node Architecture)
✅ **Self-Managing Foundation**: Zero-touch deployment with automatic registration  
✅ **WireGuard Service**: Complete VPN functionality with traffic control and isolation  
✅ **Supabase Integration**: Edge function integration with session management  
✅ **Docker Infrastructure**: Production-ready containerization with network capabilities  
✅ **Monitoring Base**: Heartbeat system with basic session tracking  
⚠️ **Security Architecture**: No edge function authentication or network isolation  
⚠️ **Resilience Gap**: No failover, circuit breakers, or scaling automation  
⚠️ **Observability Gap**: Basic logging only, no metrics or comprehensive health checks