mirror of
https://github.com/azaion/loader.git
synced 2026-04-22 21:56:33 +00:00
Oleksandr Bezdieniezhnykh
296 lines
11 KiB
Markdown
296 lines
11 KiB
Markdown
# Azaion.Loader — System Flows
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## Flow Inventory
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| # | Flow Name | Trigger | Primary Components | Criticality |
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|---|--------------------|----------------------------|-----------------------------|-------------|
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| F1| Authentication | POST `/login` | 04 HTTP API, 03 Resource Mgmt | High |
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| F2| Resource Download | POST `/load/{filename}` | 04, 03, 02 | High |
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| F3| Resource Upload | POST `/upload/{filename}` | 04, 03, 02 | High |
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| F4| Docker Unlock | POST `/unlock` | 04, 03 | High |
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| F5| Unlock Status Poll | GET `/unlock/status` | 04 | Medium |
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| F6| Health/Status | GET `/health`, `/status` | 04 | Low |
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## Flow Dependencies
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| Flow | Depends On | Shares Data With |
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|------|--------------------------------|-------------------------------|
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| F1 | — | F2, F3, F4 (via JWT token) |
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| F2 | F1 (credentials must be set) | — |
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| F3 | F1 (credentials must be set) | — |
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| F4 | — (authenticates internally) | F5 (via unlock_state) |
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| F5 | F4 (must be started) | — |
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| F6 | — | F1 (reads auth state) |
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---
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## Flow F1: Authentication
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### Description
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Client sends email/password to set credentials on the API client singleton. This initializes the CDN manager by downloading and decrypting `cdn.yaml` from the Azaion Resource API.
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### Preconditions
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- Loader service is running
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- Azaion Resource API is reachable
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### Sequence Diagram
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```mermaid
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sequenceDiagram
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participant Client
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participant HTTPApi as HTTP API (main)
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participant ApiClient as ApiClient
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participant Security as Security
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participant HW as HardwareService
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participant ResourceAPI as Azaion Resource API
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Client->>HTTPApi: POST /login {email, password}
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HTTPApi->>ApiClient: set_credentials_from_dict(email, password)
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ApiClient->>ApiClient: set_credentials(Credentials)
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ApiClient->>ApiClient: login()
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ApiClient->>ResourceAPI: POST /login {email, password}
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ResourceAPI-->>ApiClient: {token: "jwt..."}
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ApiClient->>ApiClient: set_token(jwt) → decode claims → create User
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ApiClient->>HW: get_hardware_info()
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HW-->>ApiClient: "CPU: ... GPU: ..."
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ApiClient->>Security: get_hw_hash(hardware)
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Security-->>ApiClient: hw_hash
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ApiClient->>Security: get_api_encryption_key(creds, hw_hash)
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Security-->>ApiClient: api_key
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ApiClient->>ResourceAPI: POST /resources/get/ {cdn.yaml, encrypted}
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ResourceAPI-->>ApiClient: encrypted bytes
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ApiClient->>Security: decrypt_to(bytes, api_key)
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Security-->>ApiClient: cdn.yaml content
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ApiClient->>ApiClient: parse YAML → init CDNManager
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HTTPApi-->>Client: {"status": "ok"}
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```
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### Error Scenarios
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| Error | Where | Detection | Recovery |
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|--------------------|--------------------|--------------------|------------------------------|
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| Invalid credentials| Resource API login | HTTPError (401/409)| Raise Exception → HTTP 401 |
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| API unreachable | POST /login | ConnectionError | Raise Exception → HTTP 401 |
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| CDN config decrypt | decrypt_to() | Crypto error | Raise Exception → HTTP 401 |
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---
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## Flow F2: Resource Download (Big/Small Split)
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### Description
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Client requests a resource by name. The loader downloads the small encrypted part from the API (per-user+hw key), retrieves the big part from local cache or CDN, concatenates them, and decrypts with the shared resource key.
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### Preconditions
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- Credentials set (F1 completed)
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- Resource exists on API and CDN
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### Sequence Diagram
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```mermaid
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sequenceDiagram
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participant Client
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participant HTTPApi as HTTP API
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participant ApiClient as ApiClient
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participant Security as Security
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participant ResourceAPI as Azaion Resource API
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participant CDN as S3 CDN
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participant FS as Local Filesystem
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Client->>HTTPApi: POST /load/{filename} {filename, folder}
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HTTPApi->>ApiClient: load_big_small_resource(name, folder)
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ApiClient->>ApiClient: load_bytes(name.small, folder)
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ApiClient->>ResourceAPI: POST /resources/get/{folder} (encrypted)
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ResourceAPI-->>ApiClient: encrypted small part
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ApiClient->>Security: decrypt_to(small_bytes, api_key)
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Security-->>ApiClient: decrypted small part
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ApiClient->>Security: get_resource_encryption_key()
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Security-->>ApiClient: shared_key
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alt Local big part exists
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ApiClient->>FS: read folder/name.big
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FS-->>ApiClient: local_big_bytes
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ApiClient->>Security: decrypt_to(small + local_big, shared_key)
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Security-->>ApiClient: plaintext resource
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else Local not found or decrypt fails
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ApiClient->>CDN: download(folder, name.big)
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CDN-->>ApiClient: remote_big_bytes
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ApiClient->>Security: decrypt_to(small + remote_big, shared_key)
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Security-->>ApiClient: plaintext resource
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end
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HTTPApi-->>Client: binary response (octet-stream)
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```
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### Error Scenarios
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| Error | Where | Detection | Recovery |
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|----------------------|-------------------|-----------------|----------------------------------|
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| Token expired | request() | 401/403 | Auto re-login, retry once |
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| CDN download fail | cdn_manager | Exception | Raise to caller → HTTP 500 |
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| Decrypt failure (local)| Security | Exception | Fall through to CDN download |
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| API 500 | request() | Status code | Raise Exception → HTTP 500 |
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---
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## Flow F3: Resource Upload (Big/Small Split)
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### Description
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Client uploads a resource file. The loader encrypts it with the shared resource key, splits into small (≤3KB or 30%) and big parts, uploads small to the API and big to CDN + local cache.
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### Preconditions
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- Credentials set (F1 completed)
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### Sequence Diagram
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```mermaid
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sequenceDiagram
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participant Client
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participant HTTPApi as HTTP API
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participant ApiClient as ApiClient
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participant Security as Security
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participant ResourceAPI as Azaion Resource API
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participant CDN as S3 CDN
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participant FS as Local Filesystem
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Client->>HTTPApi: POST /upload/{filename} (multipart: file + folder)
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HTTPApi->>ApiClient: upload_big_small_resource(bytes, name, folder)
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ApiClient->>Security: get_resource_encryption_key()
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Security-->>ApiClient: shared_key
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ApiClient->>Security: encrypt_to(resource, shared_key)
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Security-->>ApiClient: encrypted_bytes
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ApiClient->>ApiClient: split: small = min(3KB, 30%), big = rest
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ApiClient->>CDN: upload(folder, name.big, big_bytes)
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ApiClient->>FS: write folder/name.big (local cache)
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ApiClient->>ApiClient: upload_file(name.small, small_bytes, folder)
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ApiClient->>ResourceAPI: POST /resources/{folder} (multipart)
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HTTPApi-->>Client: {"status": "ok"}
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```
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---
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## Flow F4: Docker Image Unlock
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### Description
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Client triggers the unlock workflow with credentials. A background task authenticates, downloads a key fragment, decrypts the encrypted Docker image archive, and loads it into Docker.
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### Preconditions
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- Encrypted archive exists at `IMAGES_PATH`
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- Docker daemon is accessible (socket mounted)
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### Sequence Diagram
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```mermaid
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sequenceDiagram
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participant Client
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participant HTTPApi as HTTP API
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participant BinarySplit as binary_split
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participant ApiClient as ApiClient
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participant ResourceAPI as Azaion Resource API
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participant Docker as Docker CLI
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Client->>HTTPApi: POST /unlock {email, password}
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HTTPApi->>HTTPApi: check unlock_state (idle/error?)
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HTTPApi->>HTTPApi: check IMAGES_PATH exists
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HTTPApi->>HTTPApi: start background task
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HTTPApi-->>Client: {"state": "authenticating"}
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Note over HTTPApi: Background task (_run_unlock)
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HTTPApi->>BinarySplit: check_images_loaded(version)
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BinarySplit->>Docker: docker image inspect (×7 services)
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alt Images already loaded
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HTTPApi->>HTTPApi: unlock_state = ready
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else Images not loaded
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HTTPApi->>ApiClient: set_credentials + login()
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ApiClient->>ResourceAPI: POST /login
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ResourceAPI-->>ApiClient: JWT token
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HTTPApi->>BinarySplit: download_key_fragment(url, token)
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BinarySplit->>ResourceAPI: GET /binary-split/key-fragment
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ResourceAPI-->>BinarySplit: key_fragment bytes
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HTTPApi->>BinarySplit: decrypt_archive(images.enc, key, images.tar)
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Note over BinarySplit: AES-256-CBC decrypt, strip padding
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HTTPApi->>BinarySplit: docker_load(images.tar)
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BinarySplit->>Docker: docker load -i images.tar
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HTTPApi->>HTTPApi: remove tar, set unlock_state = ready
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end
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```
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### Flowchart
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```mermaid
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flowchart TD
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Start([POST /unlock]) --> CheckState{State is idle or error?}
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CheckState -->|No| ReturnCurrent([Return current state])
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CheckState -->|Yes| CheckArchive{Archive exists?}
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CheckArchive -->|No| CheckLoaded{Images already loaded?}
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CheckLoaded -->|Yes| SetReady([Set ready])
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CheckLoaded -->|No| Error404([404: Archive not found])
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CheckArchive -->|Yes| StartBG[Start background task]
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StartBG --> BGCheck{Images already loaded?}
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BGCheck -->|Yes| BGReady([Set ready])
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BGCheck -->|No| Auth[Authenticate + login]
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Auth --> DownloadKey[Download key fragment]
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DownloadKey --> Decrypt[Decrypt archive]
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Decrypt --> DockerLoad[docker load]
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DockerLoad --> Cleanup[Remove tar]
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Cleanup --> BGReady
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```
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### Error Scenarios
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| Error | Where | Detection | Recovery |
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|--------------------|----------------------|----------------------|-----------------------------------|
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| Archive missing | /unlock endpoint | os.path.exists check | 404 if images not already loaded |
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| Auth failure | ApiClient.login() | HTTPError | unlock_state = error |
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| Key download fail | download_key_fragment| HTTPError | unlock_state = error |
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| Decrypt failure | decrypt_archive | Crypto/IO error | unlock_state = error |
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| Docker load fail | docker_load | CalledProcessError | unlock_state = error |
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| Tar cleanup fail | os.remove | OSError | Silently ignored |
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---
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## Flow F5: Unlock Status Poll
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### Description
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Client polls the unlock workflow progress. Returns current state and any error message.
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### Preconditions
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- F4 has been initiated (or state is idle)
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### Data Flow
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| Step | From | To | Data | Format |
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|------|--------|--------|-------------------------------|--------|
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| 1 | Client | HTTPApi| GET /unlock/status | — |
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| 2 | HTTPApi| Client | {state, error} | JSON |
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---
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## Flow F6: Health & Status
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### Description
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Liveness probe (`/health`) returns static healthy. Status check (`/status`) returns auth state and model cache dir.
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### Data Flow
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| Step | From | To | Data | Format |
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|------|--------|--------|----------------------------------------|--------|
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| 1 | Client | HTTPApi| GET /health or /status | — |
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| 2 | HTTPApi| Client | {status, authenticated?, modelCacheDir?}| JSON |
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