ModuleNotFoundError: No module named 'app' fastapi docker-CodePudding

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

CodePudding user response：

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

CodePudding user response：

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.

CodePudding user response：

Have you built your docker image before using it?