apt-ostree/.notes/architecture/system_design.md
robojerk 3521e79310 🎉 MAJOR MILESTONE: Complete apt-ostree implementation with 100% rpm-ostree compatibility
 All 21 rpm-ostree commands implemented:
- High Priority (5/5): Status, Deploy, Reset, Rebase, Kargs
- Medium Priority (4/4): Install, Remove, Upgrade, Rollback
- Low Priority (7/7): List, History, DB, Initramfs, Reload, Search, Info
- Additional (5/5): Checkout, Prune, Compose, Override, RefreshMd

 Real APT Integration:
- Client-side package management
- Atomic operations with rollback
- State synchronization

 Production-Ready Architecture:
- Daemon-client with D-Bus communication
- Bubblewrap sandboxing
- Fallback mechanisms

 Advanced Features:
- OCI container image generation
- Comprehensive error handling
- Full test coverage

This represents a complete, production-ready apt-ostree implementation
that provides 100% rpm-ostree compatibility for Debian/Ubuntu systems.
2025-07-19 07:14:28 +00:00

3.3 KiB

System Architecture Design Guide

Overview

This document combines research on advanced architecture, daemon design, and critical integration for apt-ostree.

Advanced Architecture Research

Core Principles

  • Modular design: Separate concerns into distinct modules
  • Interface abstraction: Clean interfaces between components
  • Error handling: Comprehensive error management
  • Security model: Privilege separation and authentication

Component Architecture

  • CLI layer: User interface and command parsing
  • Daemon layer: Privileged operations and state management
  • Integration layer: APT-OSTree coordination
  • Storage layer: OSTree and package management

Daemon Architecture

Design Philosophy

  • Privilege separation: Root operations isolated in daemon
  • D-Bus communication: Standard system service interface
  • Service activation: Systemd integration
  • State management: Centralized system state

Implementation

  • apt-ostreed: Main daemon process
  • D-Bus interface: Service communication protocol
  • Policy management: Security and access control
  • Transaction handling: Atomic operation management

D-Bus Interface

  • org.aptostree.dev: Service interface
  • Method definitions: Package management operations
  • Signal handling: State change notifications
  • Error reporting: Comprehensive error information

Critical Integration

APT-OSTree Coordination

  • Package installation: APT operations in OSTree context
  • State synchronization: Keep databases in sync
  • Transaction management: Atomic package operations
  • Rollback support: Complete system rollback

Bubblewrap Integration

  • Script sandboxing: Secure package script execution
  • Namespace isolation: Process isolation
  • Bind mounts: Controlled filesystem access
  • Security controls: Privilege restrictions

Filesystem Management

  • OSTree operations: Commit creation and management
  • Layer application: Package layer integration
  • Deployment management: Boot configuration
  • State tracking: System state monitoring

Implementation Strategy

Phase 1: Foundation

  • Basic daemon-client architecture
  • D-Bus communication setup
  • Security policy configuration
  • Error handling framework

Phase 2: Integration

  • APT package management integration
  • OSTree filesystem operations
  • Transaction management
  • Rollback implementation

Phase 3: Advanced Features

  • Bubblewrap sandboxing
  • Advanced security features
  • Performance optimization
  • Comprehensive testing

Technical Details

D-Bus Communication

  • Service registration and activation
  • Method call handling
  • Signal emission and reception
  • Error propagation

Security Model

  • Privilege separation
  • Access control policies
  • Sandboxing implementation
  • Audit logging

State Management

  • System state tracking
  • Transaction state management
  • Rollback state preservation
  • Configuration management

References

  • See .notes/research/advanced-architecture.md for detailed architecture research
  • See .notes/research/daemon.md for daemon architecture details
  • See .notes/rpm-ostree/daemon-client-architecture.md for rpm-ostree daemon analysis
  • See .notes/critical_integration_implementation.md for critical integration details