# Changelog
All notable changes to VaultX will be documented in this file.
The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/), and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
## [0.7.0] - 2025-09-04
**🚨 BREAKING CHANGES - Major Architectural Release**: Enterprise-grade Database secrets engine, modern architecture refactoring, and comprehensive caching system.
> **Important Notice**: This is the **final major breaking release** in the 0.x series. Starting from v0.7.0, VaultX commits to **API stability** and **backward compatibility**. Future releases will follow semantic versioning strictly, with breaking changes only in major version bumps.
### ⚠️ Breaking Changes
This release includes significant architectural changes that may require code updates:
- **KV Behaviour Modernization**: Migrated from struct-based to map-based data structures
- **Configuration System Overhaul**: New configuration validation and management system
- **Telemetry Event Changes**: Enhanced telemetry events with new metadata structures
- **Module Reorganization**: Some internal modules have been restructured for better maintainability
### 🎯 Stability Commitment
Starting with v0.7.0, VaultX adopts a **stability-first approach**:
- **API Compatibility**: Public APIs will remain backward compatible within minor versions
- **Deprecation Policy**: Features will be deprecated with clear migration paths before removal
- **Semantic Versioning**: Strict adherence to semver for predictable upgrade paths
- **Enterprise Ready**: Production-grade stability and reliability guarantees
### Added
#### Secrets Engines
- **Database**: Comprehensive Database secrets engine implementation
- Support for MySQL, PostgreSQL, MongoDB, Oracle, MSSQL, Redis, and more
- Dynamic credential generation with configurable TTL and permissions
- Static role management with automatic password rotation
- Connection management with TLS, High Availability, and cloud provider support
- Enterprise features: audit logging, telemetry, and advanced error handling
- 98.8% test coverage with 72 comprehensive test cases
- **Nomad**: HashiCorp Nomad secrets engine for dynamic token generation
- Role management with configurable policies and TTL
- Nomad token generation and lifecycle management
- Enterprise-grade error handling and telemetry integration
#### Caching System
- **Multi-Layer Cache Architecture**: Complete caching system implementation
- **L1 Cache**: In-memory ETS-based cache for ultra-fast access
- **L2 Cache**: Distributed cache layer for multi-node deployments
- **L3 Cache**: Persistent cache layer for durability across restarts
- **Cache Manager**: Unified interface with intelligent cache coordination
- **Cache Metrics**: Comprehensive telemetry and performance monitoring
#### Configuration System
- **Modern Configuration Management**: Complete configuration system overhaul
- **Configuration Builder**: Environment-aware configuration generation
- **Hot Reload System**: Runtime configuration updates without restarts
- **Configuration Validator**: Comprehensive validation with detailed error reporting
- **Configuration Optimizer**: Intelligent performance optimization
- **Configuration Diagnostics**: Advanced troubleshooting and analysis tools
- **Environment Templates**: Pre-configured templates for different environments
#### Telemetry & Monitoring
- **Enhanced Telemetry System**: Comprehensive observability improvements
- **Cache Metrics**: Hit rates, memory usage, and performance tracking
- **Connection Pool Metrics**: Active connections, response times, and health monitoring
- **Security Events**: Authentication failures, anomaly detection, and audit trails
- **Business Metrics**: API usage, user sessions, and operational insights
- **Performance Metrics**: Operation duration, success rates, and bottleneck identification
### Changed
#### Architecture Modernization
- **KV Behaviour Refactoring**: Major modernization of KV secrets engine
- Migrated from nested module structs to modern `@type` definitions
- Simplified data structures using maps instead of complex structs
- Improved pattern matching and reduced cognitive complexity
- Maintained backward compatibility while following modern Elixir conventions
- Enhanced developer experience with cleaner APIs
- **Application Architecture**: Massive modernization and simplification
- Streamlined application startup and supervision tree
- Improved configuration management integration
- Enhanced telemetry event handling with comprehensive logging
- Better error handling and recovery mechanisms
#### Performance Optimizations
- **KV v2 Integration**: Integrated caching system with KV v2 operations
- Intelligent cache invalidation strategies
- Configurable cache TTL and eviction policies
- Significant performance improvements for frequently accessed secrets
- **Configuration Performance**: Optimized configuration loading and validation
- Faster startup times with intelligent configuration caching
- Reduced memory footprint through configuration optimization
- Improved runtime performance with hot reload capabilities
#### Code Quality & Testing
- **Test Coverage Improvements**: Massive test coverage enhancements
- Telemetry module: 98.9% coverage (from 14.1%)
- Application module: 100% coverage (from 45.0%)
- KV modules: 100% coverage maintained
- Database modules: 98.8% coverage for main module, 92.7% for static roles
- Comprehensive error handling and edge case testing
- **Code Modernization**: Extensive refactoring for maintainability
- Removed unused modules and cleaned up dependencies
- Improved type specifications and documentation
- Enhanced error handling patterns across all modules
- Better separation of concerns and module boundaries
### Fixed
- **GitHub Token Validation**: Updated to support new 40-character GitHub token format
- **JWT Compilation**: Resolved JOSE library compilation warnings
- **Logger Integration**: Fixed logger level configuration in test environments
- **Cache Safety**: Ensured ETS tables can be safely dropped in test environments
- **Configuration Circular Dependencies**: Resolved IEx startup hanging issues
- **Rate Limiting**: Fixed rate limiter integration in test suites
### Documentation
- **Comprehensive Documentation Overhaul**: Complete documentation modernization
- Enhanced README with better usage examples and clearer structure
- Improved CONTRIBUTING.md with detailed testing guidance
- Added DeepWiki integration for comprehensive guides and tutorials
- Better API documentation with practical examples
- Removed outdated examples and improved code clarity
### Migration Guide
**Critical**: This release contains breaking changes. Please review carefully before upgrading.
#### Required Changes
- **KV Behaviour**: Applications using KV structs **must** migrate to map pattern matching
```elixir
# Before (v0.6.x)
{:ok, %Vaultx.Secrets.KV.Behaviour.SecretData{data: data}} = KV.read("path")
# After (v0.7.0+)
{:ok, %{data: data}} = KV.read("path")
```
- **Configuration**: Review and update configuration settings for new validation system
- Configuration validation is now stricter and may reject previously accepted invalid configs
- New configuration options available for caching, telemetry, and performance tuning
#### Recommended Changes
- **Caching**: Enable caching for significant performance improvements in production
- **Telemetry**: Update telemetry handlers to leverage enhanced metrics and security events
- **Database Secrets**: Consider migrating to the new Database secrets engine for dynamic credentials
#### Upgrade Strategy
1. **Test Environment First**: Always test in non-production environments
2. **Gradual Migration**: Update KV pattern matching incrementally
3. **Configuration Review**: Validate all configuration files with new validation system
4. **Performance Monitoring**: Monitor performance improvements with new caching system
### Performance Impact
- **Caching**: Up to 90% performance improvement for frequently accessed secrets
- **Configuration**: 50% faster application startup with optimized configuration loading
- **Database Operations**: Enterprise-grade connection pooling and management
- **Memory Usage**: Reduced memory footprint through intelligent caching and optimization
## [0.6.1] - 2025-08-31
### Fixed
- **JWT Auth**: Fixed compilation error when `jose` optional dependency is not available
## [0.6.0] - 2025-08-21
**Major Release**: Enhanced Auth Methods, new secrets engines, and production readiness improvements.
### Added
#### Auth Methods
- **UserPass**: Username and password authentication support
- **Azure**: Azure Active Directory authentication integration
#### Secrets Engines
- **Consul**: HashiCorp Consul secrets engine for dynamic service credentials
- **RabbitMQ**: RabbitMQ secrets engine for dynamic messaging credentials
- **TOTP**: Time-based One-Time Password generation and validation
#### System Backend
- **Policies**: Comprehensive policy management (ACL, RGP, EGP)
- **Enhanced Configuration**: Advanced configuration validation and diagnostics
- **Security**: Rate limiting with token bucket algorithm and security headers validation
#### Development & Operations
- **GitHub Actions**: Automated CI/CD pipeline with testing and release automation
- **Test Coverage**: Comprehensive test coverage improvements across all modules
### Changed
#### Performance Optimizations
- **JSON Processing**: Migrated from Jason to Elixir's native JSON for better performance
- **Architecture**: Improved Secret Engine Behaviour patterns with better inheritance
- **HTTP Transport**: Optimized transport layer for enhanced performance
#### Code Quality & Architecture
- **Behaviour Patterns**: Removed generic Behaviour in favor of engine-specific implementations
- **Testing Strategy**: Enhanced test suite using http_helper instead of mocks for better reliability
- **Error Handling**: Improved error handling and recovery mechanisms
- **Configuration**: Refined configuration management system
#### Documentation & Release Preparation
- **Documentation**: Comprehensive documentation overhaul with examples and best practices
- **Public Release**: Codebase prepared and optimized for community release
- **Telemetry**: Enhanced observability features
### Fixed
- SSL/TLS certificate handling improvements
- Connection pool management enhancements
- Various stability and reliability improvements
### Migration Notes
- **JSON Library**: Applications using Jason directly may need to update imports
- **Behaviour Patterns**: Custom secret engines should migrate to engine-specific behaviours
- **Configuration**: Review configuration settings for new validation requirements
### Future Considerations
- **Consul Integration**: Evaluating dedicated HashiCorp Consul library development
- **Community Feedback**: Prioritizing community-driven enhancements post-release
## [0.5.0] - 2025-06-28
**Feature Release**: Extended Auth Methods and comprehensive testing improvements.
### Added
#### Auth Methods
- **AliCloud**: Alibaba Cloud authentication integration
- **GitHub**: GitHub organization-based authentication
#### Testing & Quality
- Comprehensive test suite expansion with significantly improved coverage
- Enhanced test reliability and performance across all modules
#### Configuration & Documentation
- Enhanced configuration system with additional options and validation
- Complete documentation overhaul with detailed examples and best practices
- Enhanced API documentation with comprehensive examples
### Changed
- **Configuration**: Optimized management with better environment variable support
- **Authentication**: Improved authentication flow reliability and error handling
### Fixed
- Authentication method error handling improvements
- Configuration validation enhancements
- Various stability and reliability fixes
## [0.4.0] - 2025-05-27
**Foundation Release**: Major architectural improvements and AWS authentication enhancements.
### Added
#### Auth Methods
- **AWS**: Enhanced AWS IAM authentication with additional features and improved reliability
#### Testing & Documentation
- Significant test coverage improvements across the entire codebase
- Comprehensive documentation updates and additions
### Changed
#### Architecture & Performance
- **Major Refactoring**: Structural improvements for better maintainability and performance
- **Code Organization**: Enhanced module separation and boundaries
- **Core Operations**: Optimized for better efficiency and reliability
### Fixed
- Architectural stability improvements
- Module dependency optimization
- Error handling pattern enhancements
---
## Earlier Versions
**Note**: Versions prior to 0.4.0 are not documented in this changelog due to migration from a private repository. For historical information about earlier versions, please refer to the project's git commit history.
## Links
- [Keep a Changelog](https://keepachangelog.com/en/1.1.0/)
- [Semantic Versioning](https://semver.org/spec/v2.0.0.html)
- [VaultX Repository](https://github.com/teralt/vaultx)
