fastapi: FastAPI/Uvicorn crashes every day around the same time, different APIs, different providers

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Example Code

app = FastAPI()


@app.get("/", response_class=HTMLResponse)
async def read_item(request: Request, pac_id: str = None, _oauth2_proxy: str = Cookie(default="")):  
   pass

Description

Three different FastAPI’s are crashing every day around the same time (different times per API), running Dockerized on Kubernetes with Uvicorn.

It is not DDOS or anything, as the APIs are using Basic Auth and are behind an nginx proxy which handles authentication.

It is not DB dependent, as one uses MongoDB, one PostgreSQL, one no DB.

Providers are Hetzner, AWS and Advin (Frankfurt, Nürnberg, Amsterdam)

The docker container has a huge CPU and Disk usage before Kubernetes “resets” the container, which causes a downtime of ~5 minutes every day.

I read in some tickets that people experience something similar with uvicorn - is that a problem? I’m running the app in the docker image with: CMD ["uvicorn", "main:app", "--host", "0.0.0.0"] and am using python:3.10-slim

Any recommendations? I would say either a FastAPI problem or Uvicorn

Operating System

Linux

Operating System Details

Kubernetes 1.24.9 Docker Image 3.10-slim Linux Host (Ubuntu Server 22.04)

FastAPI Version

0.89.0

Python Version

3.10.9

Additional Context