ModuleNotFoundError: No module named 'app' fastapi docker

user_11198114 0
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FROM python:3.8
WORKDIR /app 

COPY requirements.txt /
RUN pip install --requirement /requirements.txt

COPY ./app /app

EXPOSE 8000
CMD ["uvicorn", "app.main:app", "--host=0.0.0.0" , "--reload" , "--port", "8000"]

when i used

docker-compose up -d
ModuleNotFoundError: No module named 'app'

  • the folders in Fastapi framework:

  • fastapi

    • app

      -main.py

  •    language_detector.py

  • Dockerfile

  • docker-compose

fastapi docker python
3 Answers
CMD ["uvicorn", "main:app", "--host=0.0.0.0" , "--reload" , "--port", "8000"]

Your work directory is /app and the main.py file is already there. So you don't need to call app.main module. Just call main.py script directly in CMD.

user_66999260

Try creating the /app folder before

FROM python:3.8
RUN mkdir -p /app
WORKDIR /app 

COPY requirements.txt /
RUN pip install --requirement /requirements.txt

COPY ./app /app

EXPOSE 8000
CMD ["uvicorn", "app.main:app", "--host=0.0.0.0" , "--reload" , "--port", "8000"]

And launching it:

docker-compose up --build

user_156366950

The issue could likely be caused by how you define the volume mounts on docker compose: More on mounts here

user_123377650
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