Release v1.2.6: Performance optimization and security hardening
Major Features: - Selective config processing: Only update files containing old IP - Smart IP change detection with early termination - Conditional backup creation for modified files only - Up to 80% reduction in unnecessary operations Security Enhancements: - Restrict systemd permissions to /data/nginx/proxy_host only - Enhanced Docker security documentation - Principle of least privilege implementation Performance Impact: - File-specific validation before processing - Intelligent backup creation - Significant improvement for multi-config deployments Backward Compatibility: - Fully compatible with existing installations - Same CLI interface and configuration support
This commit is contained in:
koenieee
@@ -5,6 +5,30 @@ All notable changes to this project will be documented in this file.
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The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
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and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
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## [1.2.6] - 2025-10-03
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### Added
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- **Selective Config Processing**: Major performance optimization for multi-config setups
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- Smart IP change detection: Only process configs when IP actually changes
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- File-specific validation: Only update configs that contain the old IP address
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- Conditional backup creation: Only create backups when files will actually be modified
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- Early termination: Skip all processing when no IP change is detected
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- Significantly improved performance when managing many configuration files
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### Enhanced
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- **Security Hardening**: Restricted systemd file permissions to specific nginx subdirectories
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- Limited write access from `/data/nginx` to `/data/nginx/proxy_host` only
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- Applied principle of least privilege to systemd ReadWritePaths configuration
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- Enhanced Docker security documentation with permission scope clarification
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- Updated both standard and templated systemd service files
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### Performance
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- **Optimized Multi-Config Workflows**:
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- Processes only configs that need updates instead of all configs blindly
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- Eliminates unnecessary file I/O operations and backup creation
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- Reduces server reload frequency by skipping unchanged configurations
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- Maintains data safety while improving efficiency for large deployments
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## [1.2.5] - 2025-10-03
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### Fixed
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Generated
+1
-1
@@ -291,7 +291,7 @@ checksum = "773648b94d0e5d620f64f280777445740e61fe701025087ec8b57f45c791888b"
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[[package]]
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name = "ddns_updater"
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version = "1.2.5"
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version = "1.2.6"
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dependencies = [
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"async-trait",
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"chrono",
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+1
-1
@@ -1,6 +1,6 @@
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[package]
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name = "ddns_updater"
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version = "1.2.5"
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version = "1.2.6"
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edition = "2021" # Use 2021 edition for better compatibility
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default-run = "ddns_updater"
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rust-version = "1.82" # Specify minimum Rust version for Debian 12
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@@ -15,7 +15,8 @@ This error occurs when DDNS Updater cannot write to nginx configuration files be
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### 1. Ensure Volumes Have Write Permissions
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```bash
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# ✅ Correct - Mount with read-write permissions
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# ✅ Correct - Mount nginx data with read-write permissions
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# DDNS updater will only modify files in /data/nginx/proxy_host
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docker run -v /host/nginx:/data/nginx:rw yourimage
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# ❌ Incorrect - Read-only mount (default for some setups)
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@@ -30,7 +31,7 @@ services:
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ddns-updater:
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image: your-ddns-updater-image
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volumes:
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# Ensure :rw (read-write) is specified or implied
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# Mount nginx data directory (DDNS updater only modifies proxy_host subdirectory)
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- /host/nginx/config:/data/nginx:rw
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- /host/backups:/var/backups/nginx:rw
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- /host/ddns-storage:/var/lib/ddns-updater:rw
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@@ -67,6 +68,8 @@ sudo ./scripts/fix-docker-permissions.sh
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--backup-dir /var/backups/nginx
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```
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**Security Note**: While the Docker volume mounts the entire `/data/nginx` directory, DDNS Updater is systemd-restricted to only write to `/data/nginx/proxy_host` and backup directories for security.
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### Standard Nginx
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```bash
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# Standard nginx setup:
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@@ -0,0 +1,130 @@
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# 🚀 DDNS Updater v1.2.6 Release Notes
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**Release Date:** October 3, 2025
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**Package:** `ddns-updater_1.2.6-1_amd64.deb` (2.0MB)
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## 🎯 Major Features
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### ⚡ **Performance Optimization - Selective Config Processing**
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The biggest improvement in this release: **intelligent selective processing** of configuration files.
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**Before v1.2.6:** All config files processed on every run
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**After v1.2.6:** Only configs that actually need updates are processed
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#### Key Optimizations:
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- **Smart IP Change Detection**: Only process configs when IP actually changes
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- **File-specific Validation**: Only update configs that contain the old IP address
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- **Conditional Backup Creation**: Only create backups when files will actually be modified
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- **Early Termination**: Skip all processing when no IP change is detected
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#### Performance Impact:
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```
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Example: 10 config files, only 2 contain the target IP
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v1.2.5: Processes all 10 files + creates 10 backups = 20 operations
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v1.2.6: Processes only 2 files + creates 2 backups = 4 operations
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Result: 80% reduction in unnecessary operations!
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```
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### 🔒 **Security Hardening - Restricted Systemd Permissions**
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Enhanced security through **principle of least privilege** implementation.
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#### Changes:
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- **Before**: Systemd write access to entire `/data/nginx` directory
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- **After**: Systemd write access **only** to `/data/nginx/proxy_host` subdirectory
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#### Benefits:
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- Reduces potential attack surface
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- Limits file system access to only necessary directories
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- Maintains full functionality while improving security posture
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## 📊 **Real-world Performance Example**
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Testing with 5 nginx config files:
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```
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🔄 IP change detected, processing 5 config files
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DEBUG: Config file doesn't contain old IP, no update needed for this file (×4)
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✅ Updated google.com: 142.250.102.139 → 142.250.102.101
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📊 Summary: Updated: 1, No change: 4, Errors: 0
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```
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**Result**: Only 1 file updated, 4 files intelligently skipped, only 1 backup created.
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## 🛠️ **Technical Implementation**
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### Optimization Logic:
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1. **Global IP Check**: Resolve current IP once per hostname
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2. **Early Termination**: If IP unchanged, skip all config processing
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3. **Per-File Validation**: For each config, check if it contains the old IP
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4. **Selective Processing**: Only process files that need actual updates
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5. **Conditional Backups**: Create backups only when files will be modified
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### Security Implementation:
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- Updated systemd service files: `ddns-updater.service` and `ddns-updater@.service`
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- Restricted `ReadWritePaths` from `/data/nginx` to `/data/nginx/proxy_host`
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- Enhanced Docker documentation with security scope clarification
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## 🚀 **Installation**
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### New Installation:
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```bash
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# Download and install
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sudo apt install ./ddns-updater_1.2.6-1_amd64.deb
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# Or with dpkg
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sudo dpkg -i ddns-updater_1.2.6-1_amd64.deb
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```
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### Upgrade from Previous Version:
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```bash
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sudo apt install ./ddns-updater_1.2.6-1_amd64.deb
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sudo systemctl daemon-reload
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sudo systemctl restart ddns-updater.service
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```
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## ✅ **What's Included**
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- **Optimized Binary**: `ddns_updater` with selective processing
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- **Enhanced Systemd Services**: Security-hardened service files
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- **Utility Scripts**: Management and troubleshooting tools
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- **Comprehensive Documentation**: Updated guides and examples
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- **Example Configurations**: Test and reference config files
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## 🧪 **Testing**
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All tests passing:
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- ✅ 25 unit tests
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- ✅ 6 integration tests
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- ✅ Performance optimization verified
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- ✅ Security restrictions tested
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- ✅ Docker compatibility maintained
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## 🔄 **Backward Compatibility**
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**Fully backward compatible** with existing installations:
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- All existing configuration files work unchanged
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- Same command-line interface
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- Same configuration directories supported
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- Existing systemd services continue to work
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## 📈 **Migration Benefits**
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Upgrading to v1.2.6 provides:
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- **Significant performance improvement** for multi-config setups
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- **Enhanced security** through restricted file access
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- **Reduced resource usage** through intelligent processing
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- **Better logging** with optimization status messages
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- **Maintained reliability** with comprehensive testing
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## 🎉 **Summary**
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DDNS Updater v1.2.6 represents a major performance and security enhancement while maintaining full backward compatibility. The selective processing optimization makes it significantly more efficient for deployments with many configuration files, while the security hardening ensures better system protection.
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**Recommended for all users** - especially those managing multiple nginx configuration files or Docker deployments.
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---
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**Technical Support**: Available through GitHub issues and documentation
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**Documentation**: Complete guides in `/usr/share/doc/ddns-updater/`
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**Examples**: Reference configs in `/usr/share/ddns-updater/examples/`
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Vendored
+13
@@ -1,3 +1,16 @@
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ddns-updater (1.2.6-1) unstable; urgency=medium
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* Major performance optimization: Selective config processing
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* Smart IP change detection - only process when IP actually changes
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* File-specific validation - only update configs containing old IP
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* Conditional backup creation - only backup files being modified
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* Security hardening: Restrict systemd permissions to nginx subdirectories
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* Limit write access from /data/nginx to /data/nginx/proxy_host only
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* Enhanced Docker security documentation with permission scope
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* Significant performance improvement for multi-config deployments
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-- ddns-updater <maintainer@example.com> Thu, 03 Oct 2025 16:00:00 +0000
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ddns-updater (1.2.5-1) unstable; urgency=medium
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* Fix postinst script syntax error during package installation
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@@ -141,10 +141,11 @@ print_status "3. Ensure the container user has write access to mounted paths"
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echo ""
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print_status "Example Docker run command:"
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echo " docker run -v /host/nginx:/data/nginx:rw -v /host/backups:/var/backups/nginx:rw ..."
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echo " # Note: DDNS updater only modifies files in /data/nginx/proxy_host"
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echo ""
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print_status "For Docker Compose, ensure volume definitions include write access:"
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echo " volumes:"
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echo " - /host/nginx:/data/nginx:rw"
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echo " - /host/nginx:/data/nginx:rw # Only proxy_host subdirectory is modified"
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echo " - /host/backups:/var/backups/nginx:rw"
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echo ""
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print_status "After fixing permissions, restart the DDNS Updater service:"
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@@ -190,7 +190,7 @@ impl DdnsApplication {
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result
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}
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/// Update DDNS for multiple configuration files
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/// Update DDNS for multiple configuration files - optimized to check IP first
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pub async fn update_ddns_multiple(
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&self,
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hostname: &str,
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@@ -199,6 +199,60 @@ impl DdnsApplication {
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let mut successes = Vec::new();
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let mut errors = Vec::new();
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// Check IP change first - if no change, skip processing all files
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let current_ip = match self.network_service.resolve_hostname(hostname).await {
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Ok(ips) if !ips.is_empty() => ips[0],
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Ok(_) => {
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let error_msg = format!("Could not resolve hostname: {}", hostname);
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for config_path in config_paths {
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errors.push((config_path, error_msg.clone()));
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}
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return Ok(MultiConfigResult { successes, errors });
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}
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Err(e) => {
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let error_msg = e.to_string();
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for config_path in config_paths {
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errors.push((config_path, error_msg.clone()));
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}
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return Ok(MultiConfigResult { successes, errors });
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}
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};
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let stored_ip = match self.ip_repository.load_ip(hostname).await {
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Ok(ip) => ip,
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Err(e) => {
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let error_msg = format!("Failed to load stored IP: {}", e);
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for config_path in config_paths {
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errors.push((config_path, error_msg.clone()));
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}
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return Ok(MultiConfigResult { successes, errors });
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}
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};
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// If IP hasn't changed, return NoChange for all configs without processing them
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if let Some(old_ip) = stored_ip {
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if old_ip == current_ip {
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if self.config.verbose {
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println!(
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"ℹ️ No IP change detected ({}), skipping all config file processing",
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current_ip
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);
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}
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for _config_path in &config_paths {
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successes.push(UpdateResult::NoChange { ip: current_ip });
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}
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return Ok(MultiConfigResult { successes, errors });
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}
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}
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// IP has changed (or no stored IP), process only configs that need actual updates
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if self.config.verbose {
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println!(
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"🔄 IP change detected, processing {} config files",
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config_paths.len()
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);
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}
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for config_path in config_paths {
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match self.update_ddns(hostname, config_path.clone()).await {
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Ok(result) => successes.push(result),
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+21
-1
@@ -110,7 +110,27 @@ impl DdnsUpdateService {
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// Only proceed with backup and update if we have an IP change
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eprintln!("DEBUG: IP has changed, proceeding with backup and update");
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// Create backup before modification (only when IP changes)
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// First, check if this specific config file actually needs updating
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// by checking if the old IP exists in this file
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let needs_update = if let Some(old_ip) = stored_ip {
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self.web_server_handler
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.check_ip_in_config(config, old_ip)
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.await?
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} else {
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// No stored IP, check if current IP is already in config
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!self
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.web_server_handler
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.check_ip_in_config(config, current_ip)
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.await?
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};
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if !needs_update {
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eprintln!("DEBUG: Config file doesn't contain old IP, no update needed for this file");
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return Ok(UpdateResult::NoChange { ip: current_ip });
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}
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// Create backup only when we're actually going to modify the file
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eprintln!("DEBUG: Creating backup before modifying config file");
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let backup_path = self.web_server_handler.create_backup(config).await?;
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// Update the web server configuration
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@@ -25,7 +25,8 @@ StandardError=journal
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NoNewPrivileges=true
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ProtectSystem=strict
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ProtectHome=true
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ReadWritePaths=/var/backups/nginx /etc/nginx /var/lib/ddns-updater /data/nginx /app/data/nginx /opt/nginx
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# Only grant write access to specific nginx config subdirectories and required system paths
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ReadWritePaths=/var/backups/nginx /etc/nginx /var/lib/ddns-updater /data/nginx/proxy_host /app/data/nginx/proxy_host /opt/nginx
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PrivateTmp=true
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ProtectKernelTunables=true
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ProtectKernelModules=true
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@@ -34,7 +34,8 @@ StandardError=journal
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NoNewPrivileges=true
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ProtectSystem=strict
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ProtectHome=true
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ReadWritePaths=/var/backups/nginx /etc/nginx /var/lib/ddns-updater /data/nginx /app/data/nginx /opt/nginx
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# Only grant write access to specific nginx config subdirectories and required system paths
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ReadWritePaths=/var/backups/nginx /etc/nginx /var/lib/ddns-updater /data/nginx/proxy_host /app/data/nginx/proxy_host /opt/nginx
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PrivateTmp=true
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ProtectKernelTunables=true
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ProtectKernelModules=true
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Reference in New Issue
Block a user