Uvicorn error on startup + reloader not working properly

Problem description

I am running FastAPI inside docker, and the uvicorn reloader is not working as it should. I could not find an similar issue thus I am reporting it here to see if anybode ran into this. The API works fine, but without reloader development work involves shutting down and up docker, plus such an error is probably not fit for production. It still detects changes in the code but only after 1 or 2 minutes, but every time it reloads / starts up it throws the following warning (likely related):

api_1  | INFO:     Uvicorn running on http://0.0.0.0:8000 (Press CTRL+C to quit)
api_1  | INFO:     Started reloader process [8] using statreload
api_1  | INFO:     Started server process [10]
api_1  | 2021-02-22 10:25:55 | uvicorn.error | {/usr/local/lib/python3.7/site-packages/uvicorn/_impl/asyncio.py:62} | INFO :  Started server process [10]  
api_1  | INFO:     Waiting for application startup.
api_1  | 2021-02-22 10:25:55 | uvicorn.error | {/usr/local/lib/python3.7/site-packages/uvicorn/lifespan/on.py:26} | INFO :  Waiting for application startup.
api_1  | INFO:     Application startup complete.
api_1  | 2021-02-22 10:25:55 | uvicorn.error | {/usr/local/lib/python3.7/site-packages/uvicorn/lifespan/on.py:38} | INFO :  Application startup complete.  
...
api_1  | WARNING:  StatReload detected file change in 'app/utils/colorgram.py'. Reloading...
api_1  | INFO:     Shutting down
api_1  | 2021-02-22 10:30:22 | uvicorn.error | {/usr/local/lib/python3.7/site-packages/uvicorn/_impl/asyncio.py:208} | INFO :  Shutting down
api_1  | INFO:     Waiting for application shutdown.
api_1  | 2021-02-22 10:30:22 | uvicorn.error | {/usr/local/lib/python3.7/site-packages/uvicorn/lifespan/on.py:43} | INFO :  Waiting for application shutdown.
api_1  | INFO:     Application shutdown complete.
api_1  | 2021-02-22 10:30:22 | uvicorn.error | {/usr/local/lib/python3.7/site-packages/uvicorn/lifespan/on.py:46} | INFO :  Application shutdown complete. 
api_1  | INFO:     Finished server process [10]
api_1  | 2021-02-22 10:30:22 | uvicorn.error | {/usr/local/lib/python3.7/site-packages/uvicorn/_impl/asyncio.py:75} | INFO :  Finished server process [10] 

My entrypoint.sh reads:

bash -c "uvicorn app.main:app --host 0.0.0.0 --port 8000 --reload"

Environment

• OS: Docker (Linux)
• FastAPI Version: 0.62.0
• Python version: 3.7.9
• Uvicorn: Running uvicorn 0.12.3 with CPython 3.7.9 on Linux

Additional context

Dockerfile

FROM python:3.7

# Set environment varibles
ENV PYTHONDONTWRITEBYTECODE 1
ENV PYTHONUNBUFFERED 1
ENV CODE_SRC=app

WORKDIR /code/
ENV PATH=$PATH:/code/
ENV PYTHONPATH=$PYTHONPATH:/code/

COPY pyproject.toml poetry.lock ./

RUN set -ex; \
    apt-get update ; \
    apt-get install ffmpeg libsm6 libxext6 -y ; \
    apt-get install jq -y ; \
    apt-get install -y --no-install-recommends git pkg-config ; \
    pip install poetry ; \
    poetry config virtualenvs.create false ; \
    poetry install --no-interaction --no-ansi ; \
    apt-get autoremove -y ; \
    apt-get clean -y ; \
    rm -rf /var/lib/apt/lists/*

COPY . .

ENTRYPOINT [ "./entrypoint.sh"]

Thanks!

[illpack]

Hi there, I just solved it by explicitly passing uvicorn the path where my development code lives:

--reload-dir app

so the command becomes

bash -c "uvicorn app.main:app --host 0.0.0.0 --port 8000 --reload --reload-dir app"

Hope this helps!

[tiangolo]

Thanks for the help here everyone! 👏 🙇

Thanks for reporting back and closing the issue @illpack 👍

Sorry for the long delay! 🙈 I wanted to personally address each issue/PR and they piled up through time, but now I’m checking each one in order.