Working device manager, added folders for better organization.

This commit is contained in:
ferdzo
2025-10-30 14:26:08 +01:00
parent 12d3720421
commit 7446e9b4ac
21 changed files with 342 additions and 47 deletions

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@@ -0,0 +1,10 @@
[project]
name = "db-migrations"
version = "0.1.0"
description = "DB migration scripts"
readme = "README.md"
requires-python = ">=3.13"
dependencies = [
"alembic>=1.17.0",
"sqlalchemy>=2.0.44",
]

View File

@@ -1,17 +1,29 @@
# Persistence
persistence true
persistence_location /mosquitto/data/
# Logging
log_dest file /mosquitto/log/mosquitto.log
# Standard MQTT listener (for testing without certs)
listener 1883 0.0.0.0
listener 1883
allow_anonymous true
# mTLS listener (requires client certificates)
listener 8883 0.0.0.0
listener 8883
allow_anonymous true
protocol mqtt
# Server certificates (mosquitto's identity)
certfile /mosquitto/config/server.crt
keyfile /mosquitto/config/server.key
# CA certificate to verify client certificates
cafile /mosquitto/config/ca.crt
# Certificate-based authentication
require_certificate true
use_identity_as_username true
# CA certificate to verify client certificates
cafile /mosquitto/config/ca.crt
# Optional: TLS version restrictions
# TLS version restrictions
tls_version tlsv1.2

View File

@@ -19,3 +19,8 @@ dependencies = [
dev = [
"ruff>=0.14.2",
]
[tool.uv.workspace]
members = [
"db_migrations",
]

View File

@@ -10,10 +10,10 @@ import time
import structlog
from typing import List
from config import config
from redis_reader import RedisReader
from db_writer import DatabaseWriter
from schema import SchemaHandler, StreamMessage, TelemetryReading
from src.config import config
from src.redis_reader import RedisReader
from src.db_writer import DatabaseWriter
from src.schema import SchemaHandler, StreamMessage, TelemetryReading
def configure_logging():

View File

@@ -4,9 +4,8 @@ from sqlalchemy import create_engine, select
from sqlalchemy.orm import sessionmaker
from sqlalchemy.pool import QueuePool
from config import config
from schema import TelemetryReading
from models import Telemetry
from src.config import config
from src.schema import TelemetryReading
class DatabaseWriter:
@@ -40,7 +39,7 @@ class DatabaseWriter:
try:
# Convert to database objects using the correct field mapping
db_objects = [
Telemetry(
TelemetryReading(
time=reading.time,
device_id=reading.device_id,
metric=reading.metric,

View File

@@ -1,8 +1,8 @@
import redis
import logging
from typing import List, Optional, Dict
from config import config
from schema import SchemaHandler, StreamMessage
from src.config import config
from src.schema import SchemaHandler, StreamMessage
class RedisReader:

View File

View File

@@ -135,3 +135,8 @@ class CertificateManager:
private_key_pem=credentials["private_key_pem"].decode("utf-8"),
expires_at=credentials["expires_at"],
)
def get_ca_certificate_pem(self) -> str:
"""Get the CA certificate in PEM format as a string."""
return self.ca_cert_pem.decode("utf-8")

View File

@@ -0,0 +1,83 @@
"""
Database session management for FastAPI with SQLAlchemy.
Uses dependency injection pattern for database sessions.
"""
from collections.abc import Generator
from contextlib import contextmanager
from sqlalchemy import create_engine
from sqlalchemy.orm import Session, sessionmaker
from config import config
# Create engine with connection pooling
engine = create_engine(
config.DATABASE_URL,
pool_pre_ping=True,
pool_size=5,
max_overflow=10,
echo=False,
)
SessionLocal = sessionmaker(
autocommit=False,
autoflush=False,
bind=engine,
)
def get_db() -> Generator[Session]:
"""
FastAPI dependency that provides a database session.
Usage in endpoints:
@app.post("/devices")
async def create_device(db: Session = Depends(get_db)):
device = Device(...)
db.add(device)
db.commit()
return device
The session is automatically closed after the request completes.
"""
db = SessionLocal()
try:
yield db
finally:
db.close()
@contextmanager
def get_db_context():
"""
Context manager for database sessions outside of FastAPI endpoints.
Usage:
with get_db_context() as db:
device = db.query(Device).first()
"""
db = SessionLocal()
try:
yield db
db.commit()
except Exception:
db.rollback()
raise
finally:
db.close()
def check_db_connection() -> bool:
"""
Check if database connection is working.
Returns:
True if connection successful, False otherwise
"""
try:
with engine.connect() as conn:
conn.execute("SELECT 1")
return True
except Exception as e:
print(f"Database connection failed: {e}")
return False

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@@ -0,0 +1,44 @@
"""
SQLAlchemy ORM models for device manager service.
These models mirror the database schema defined in db_migrations.
Kept separate to make the service independent.
"""
from sqlalchemy import Boolean, Column, DateTime, ForeignKey, Text
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.sql import func
Base = declarative_base()
class Device(Base):
"""IoT devices registered in the system."""
__tablename__ = "devices"
id = Column(Text, primary_key=True)
name = Column(Text, nullable=False)
location = Column(Text)
is_active = Column(Boolean, default=True)
created_at = Column(DateTime(timezone=True), server_default=func.now())
def __repr__(self):
return f"<Device(id={self.id}, name={self.name})>"
class DeviceCertificate(Base):
"""X.509 certificates issued to devices for mTLS authentication."""
__tablename__ = "device_certificates"
device_id = Column(
Text, ForeignKey("devices.id", ondelete="CASCADE"), primary_key=True
)
certificate_pem = Column(Text, nullable=False)
private_key_pem = Column(Text)
issued_at = Column(DateTime(timezone=True), nullable=False)
expires_at = Column(DateTime(timezone=True), nullable=False)
revoked_at = Column(DateTime(timezone=True))
def __repr__(self):
return f"<DeviceCertificate(device_id={self.device_id}, expires={self.expires_at})>"

View File

@@ -1,26 +1,77 @@
from fastapi import FastAPI
import datetime
import logging
from fastapi import FastAPI, HTTPException
from cert_manager import CertificateManager
from models import DeviceRegistrationRequest, DeviceRegistrationResponse
from database import get_db_context
from db_models import Device, DeviceCertificate # SQLAlchemy ORM models
from models import DeviceRegistrationRequest, DeviceRegistrationResponse # Pydantic API models
logger = logging.getLogger(__name__)
app = FastAPI()
cert_manager = CertificateManager()
@app.get("/")
async def hello():
return {"Hello": "World"}
@app.post("/devices/register")
async def register_device(request: DeviceRegistrationRequest) -> DeviceRegistrationResponse:
async def register_device(
request: DeviceRegistrationRequest,
) -> DeviceRegistrationResponse:
"""
Register a new device and issue an X.509 certificate.
"""
try:
response = cert_manager.register_device(
name=request.name,
location=request.location,
)
with get_db_context() as db:
device = Device(
id=response.device_id,
name=request.name,
location=request.location,
created_at=datetime.datetime.now(datetime.UTC),
)
db.add(device)
device_cert = DeviceCertificate(
device_id=response.device_id,
certificate_pem=response.certificate_pem,
private_key_pem=response.private_key_pem,
issued_at=datetime.datetime.now(datetime.UTC),
expires_at=response.expires_at,
)
db.add(device_cert)
except Exception as e:
logger.error(
f"Failed to register device {request.name}: {str(e)}", exc_info=True
)
raise HTTPException(
status_code=500, detail="Failed to register device. Please try again."
) from e
return response
@app.get("/ca_certificate")
async def get_ca_certificate() -> str:
"""
Retrieve the CA certificate in PEM format.
"""
try:
ca_cert_pem = cert_manager.get_ca_certificate_pem()
return ca_cert_pem
except Exception as e:
logger.error(f"Failed to retrieve CA certificate: {str(e)}", exc_info=True)
raise HTTPException(
status_code=500, detail="Failed to retrieve CA certificate."
) from e

View File

@@ -2,26 +2,6 @@ import datetime
from pydantic import BaseModel
class Device(BaseModel):
"""IoT devices registered in the system."""
id: str
name: str
location: str | None = None
is_active: bool = True
created_at: datetime.datetime
class DeviceCertificate(BaseModel):
"""X.509 certificates issued to devices for mTLS authentication."""
device_id: str
certificate_pem: str
private_key_pem: str | None = None
issued_at: datetime.datetime
expires_at: datetime.datetime
revoked_at: datetime.datetime | None = None
class DeviceRegistrationRequest(BaseModel):
"""Request model for registering a new device."""

View File

@@ -8,8 +8,10 @@ dependencies = [
"cryptography>=46.0.3",
"fastapi[standard]>=0.120.2",
"nanoid>=2.0.0",
"psycopg2-binary>=2.9.11",
"pydantic>=2.12.3",
"python-dotenv>=1.2.1",
"sqlalchemy>=2.0.44",
"uvicorn>=0.38.0",
]

View File

@@ -172,8 +172,10 @@ dependencies = [
{ name = "cryptography" },
{ name = "fastapi", extra = ["standard"] },
{ name = "nanoid" },
{ name = "psycopg2-binary" },
{ name = "pydantic" },
{ name = "python-dotenv" },
{ name = "sqlalchemy" },
{ name = "uvicorn" },
]
@@ -182,8 +184,10 @@ requires-dist = [
{ name = "cryptography", specifier = ">=46.0.3" },
{ name = "fastapi", extras = ["standard"], specifier = ">=0.120.2" },
{ name = "nanoid", specifier = ">=2.0.0" },
{ name = "psycopg2-binary", specifier = ">=2.9.11" },
{ name = "pydantic", specifier = ">=2.12.3" },
{ name = "python-dotenv", specifier = ">=1.2.1" },
{ name = "sqlalchemy", specifier = ">=2.0.44" },
{ name = "uvicorn", specifier = ">=0.38.0" },
]
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View File

@@ -1,8 +1,8 @@
import logging
import signal
import sys
from mqtt_client import MQTTClient
from redis_writer import RedisWriter
from src.mqtt_client import MQTTClient
from src.redis_writer import RedisWriter
logging.basicConfig(
level=getattr(logging, "INFO"),

View File

@@ -1,7 +1,7 @@
import logging
import paho.mqtt.client as mqtt
from typing import Callable
from config import config
from src.config import config
logger = logging.getLogger(__name__)

View File

@@ -1,7 +1,7 @@
import redis
import logging
from datetime import datetime
from config import config
from src.config import config
logger = logging.getLogger(__name__)

25
uv.lock generated
View File

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