haproxy-manager-base/UPGRADE_SUMMARY.md

HAProxy Manager Upgrade Summary

This document summarizes the new features and improvements added to the HAProxy Manager project.

New Features Implemented

1. API Key Authentication

• Feature: Optional API key authentication for all API endpoints
• Implementation:
  • Environment variable HAPROXY_API_KEY controls authentication
  • Bearer token authentication using Authorization: Bearer <key> header
  • Health check endpoint (/health) and web UI (/) remain unauthenticated
  • Graceful fallback to unauthenticated mode when no API key is set
• Security: All API endpoints (except health check) require authentication when API key is configured

2. Certificate Renewal API

• Endpoint: POST /api/certificates/renew
• Functionality:
  • Triggers renewal of all Let's Encrypt certificates
  • Automatically updates combined certificate files for HAProxy
  • Regenerates HAProxy configuration
  • Reloads HAProxy with new certificates
  • Returns detailed status of renewal process
• Error Handling: Comprehensive error logging and status reporting

3. Certificate Download Endpoints

• Endpoints:
  • GET /api/certificates/<domain>/download - Combined certificate (cert + key)
  • GET /api/certificates/<domain>/key - Private key only
  • GET /api/certificates/<domain>/cert - Certificate only (no private key)
• Use Case: Allow other services to securely download certificates for their own use
• Security: All endpoints require API key authentication

4. Certificate Status Monitoring

• Endpoint: GET /api/certificates/status
• Functionality:
  • Lists all certificates with expiration dates
  • Calculates days until expiration
  • Provides certificate file paths
  • Enables proactive certificate management

5. Comprehensive Error Logging and Alerting

• Logging System:
  • Structured JSON logging for all operations
  • Separate error log file (/var/log/haproxy-manager-errors.log)
  • General application log (/var/log/haproxy-manager.log)
  • Timestamped operation tracking
• Alerting Capabilities:
  • Error detection and logging
  • Certificate expiration warnings
  • HAProxy operation failure tracking
  • Configurable alerting via monitoring script

Technical Improvements

Enhanced Error Handling

• All API endpoints now include comprehensive error handling
• Detailed error messages with logging
• Graceful failure handling for HAProxy operations
• Certificate operation error tracking

Improved Logging

• Structured logging with timestamps
• Operation success/failure tracking
• Error categorization and alerting
• Debug information for troubleshooting

Better HAProxy Integration

• Enhanced configuration validation
• Improved reload/restart handling
• Better error reporting for HAProxy operations
• Automatic recovery from configuration errors

New Scripts and Tools

1. Monitoring Script (scripts/monitor-errors.sh)

• Purpose: Monitor error logs and certificate expiration
• Features:
  • Check for recent errors in configurable time windows
  • Monitor certificate expiration dates
  • Email and webhook alerting capabilities
  • Configurable thresholds and intervals
• Usage: Can be integrated with cron for automated monitoring

2. API Test Script (scripts/test-api.sh)

• Purpose: Test all new API endpoints
• Features:
  • Comprehensive API endpoint testing
  • Authentication testing
  • Colored output for easy reading
  • Detailed response logging

3. Monitoring Configuration (scripts/monitoring-example.conf)

• Purpose: Example configuration for monitoring setup
• Features:
  • Email and webhook configuration examples
  • Crontab entry examples
  • Monitoring interval recommendations

Updated Files

Core Application

• haproxy_manager.py - Major updates with new endpoints and features
• requirements.txt - No changes needed (existing dependencies sufficient)
• Dockerfile - Added jq package and log directory setup

Documentation

• README.md - Comprehensive updates with new feature documentation
• UPGRADE_SUMMARY.md - This summary document

Scripts

• scripts/monitor-errors.sh - New monitoring and alerting script
• scripts/test-api.sh - New API testing script
• scripts/monitoring-example.conf - New monitoring configuration example

Environment Variables

Variable	Description	Default	Required
HAPROXY_API_KEY	API key for authentication	None	No (optional)

Migration Guide

For Existing Users

1. No Breaking Changes: Existing functionality remains unchanged
2. Optional Authentication: API key is optional - set HAPROXY_API_KEY to enable
3. Backward Compatibility: All existing endpoints work without authentication when no API key is set

For New Deployments

1. Recommended: Set HAPROXY_API_KEY for production deployments
2. Monitoring: Configure monitoring script for automated alerting
3. Testing: Use test script to verify all endpoints work correctly

API Endpoints Summary

Existing Endpoints (Updated with Authentication)

• GET /health - Health check (no auth required)
• GET /api/domains - List domains
• POST /api/domain - Add domain
• DELETE /api/domain - Remove domain
• POST /api/ssl - Request SSL certificate
• GET /api/regenerate - Regenerate configuration
• GET /api/reload - Reload HAProxy

New Endpoints

• POST /api/certificates/renew - Renew all certificates
• GET /api/certificates/status - Get certificate status
• GET /api/certificates/<domain>/download - Download combined certificate
• GET /api/certificates/<domain>/key - Download private key
• GET /api/certificates/<domain>/cert - Download certificate only

Security Considerations

1. API Key Security: Use strong, unique API keys for production
2. Network Security: Restrict access to port 8000 using firewalls
3. Certificate Security: Private key endpoints require authentication
4. Log Security: Monitor log files for sensitive information

Monitoring and Alerting

1. Error Monitoring: Monitor /var/log/haproxy-manager-errors.log
2. Certificate Monitoring: Use certificate status endpoint for expiration tracking
3. HAProxy Monitoring: Health check endpoint provides service status
4. Automated Alerting: Configure monitoring script with email/webhook alerts

Future Enhancements

Potential areas for future development:

1. Webhook integration for certificate renewal notifications
2. Advanced certificate management (wildcard certificates, etc.)
3. HAProxy statistics and monitoring endpoints
4. Configuration backup and restore functionality
5. Multi-tenant support with per-domain API keys