mirror of
https://github.com/azaion/loader.git
synced 2026-04-22 08:16:33 +00:00
Oleksandr Bezdieniezhnykh
66 lines
3.6 KiB
Markdown
66 lines
3.6 KiB
Markdown
# Azaion.Loader — Solution
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## 1. Product Solution Description
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Azaion.Loader is a lightweight HTTP microservice that runs on edge devices to manage the secure distribution of encrypted Docker images and AI model resources. It acts as a bridge between the centralized Azaion Resource API, an S3-compatible CDN, and the local Docker daemon.
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```mermaid
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graph LR
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Client([HTTP Client]) --> Loader[Azaion.Loader<br/>FastAPI]
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Loader --> API[Azaion Resource API]
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Loader --> CDN[S3 CDN]
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Loader --> Docker[Docker Daemon]
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Loader --> FS[Local Filesystem]
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```
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The service provides three core capabilities:
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1. **Authentication** — proxy login to the Azaion Resource API, extracting user roles from JWT
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2. **Resource management** — encrypted download/upload of AI models using a binary-split scheme (small part via API, large part via CDN)
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3. **Docker unlock** — download a key fragment, decrypt an encrypted Docker image archive, and load it into the local Docker daemon
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## 2. Architecture
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### Solution Table
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| Solution | Tools | Advantages | Limitations | Requirements | Security | Cost | Fit |
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|----------|-------|-----------|-------------|-------------|----------|------|-----|
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| Cython + FastAPI microservice | Python 3.11, Cython 3.1.3, FastAPI, boto3, cryptography | IP protection via compiled extensions; fast HTTP; Python ecosystem access | Single-threaded blocking I/O for large files; Cython debugging difficulty | ARM64 edge device, Docker socket access | AES-256-CBC encryption, hardware-bound keys, split-storage scheme | Minimal — single container, no database | High — purpose-built for edge deployment with security constraints |
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### Component Architecture
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| # | Component | Modules | Responsibility |
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|---|-----------|---------|----------------|
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| 01 | Core Models | constants, credentials, user, unlock_state | Shared types, constants, logging |
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| 02 | Security | security, hardware_service | AES-256-CBC crypto, key derivation, HW fingerprint |
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| 03 | Resource Management | api_client, cdn_manager, binary_split | Auth, resource download/upload, Docker unlock |
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| 04 | HTTP API | main | FastAPI endpoints (thin controller) |
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### Key Design Patterns
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- **Binary-split storage**: Resources are encrypted then split — small part on authenticated API, large part on CDN. Compromise of either alone is insufficient.
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- **Hardware-bound keys**: Download encryption keys derive from user credentials + machine hardware fingerprint (CPU, GPU, RAM, drive serial).
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- **Compiled extensions**: Security-sensitive Cython modules compile to `.so` files, protecting IP and key derivation logic.
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- **Lazy initialization**: `ApiClient` and Cython imports are lazy-loaded to minimize startup time and avoid import-time side effects.
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## 3. Testing Strategy
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**Current state**: No test suite exists. No test framework is configured. No test files are present in the codebase.
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**Integration points that would benefit from testing**:
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- API authentication flow (login → JWT decode → User creation)
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- Binary-split encrypt/decrypt round-trip
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- CDN upload/download operations
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- Hardware fingerprint collection (platform-specific)
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- Docker image unlock state machine
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## 4. References
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| Artifact | Path | Description |
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|----------|------|-------------|
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| Dockerfile | `Dockerfile` | Container build with Cython compilation + Docker CLI |
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| CI config | `.woodpecker/build-arm.yml` | ARM64 Docker build pipeline |
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| Dependencies | `requirements.txt` | Python/Cython package list |
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| Build config | `setup.py` | Cython extension compilation |
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| Architecture doc | `_docs/02_document/architecture.md` | Full architecture document |
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| System flows | `_docs/02_document/system-flows.md` | All system flow diagrams |
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