Error: Got unexpected extra argument (app.main:app)

[vagarwal77]

vivekagarwal@-MacBook-Pro rwe_external_integrations % docker run -t exter-rwe:latest
Usage: uvicorn [OPTIONS] APP
Try 'uvicorn --help' for help.

Error: Got unexpected extra argument (app.main:app)

FROM tiangolo/uvicorn-gunicorn-fastapi:python3.8
COPY requirements.txt .
RUN pip install -r requirements.txt
COPY ./app /app
EXPOSE 6565
ENTRYPOINT ["uvicorn"]
CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "6565"]

[tarnopolskyi]

Hey
seems like it's because of CMD definition. Don't know what exactly, but smth inside uvicorn can't start with args which uvicorn get from docker CMD
try:
CMD uvicorn app.main:app --host 0.0.0.0 --port 6565

[liyuling]

Any update on this issue?

[osuzdalev]

Hey seems like it's because of CMD definition. Don't know what exactly, but smth inside uvicorn can't start with args which uvicorn get from docker CMD try: CMD uvicorn app.main:app --host 0.0.0.0 --port 6565

This worked for me.

[muelletm]

This should also work:

ENTRYPOINT ["uvicorn"]
CMD ["app.main:app", "--host", "0.0.0.0", "--port", "6565"]

(otherwise you will execute uvicorn uvicorn app.main:app ...)

[tiangolo]

This Docker image expected you not to define any ENTRYPOINT nor CMD. 🤓

---

Now that Uvicorn supports managing workers with --workers, including restarting dead ones, there's no need for Gunicorn. That also means that it's much simpler to build a Docker image from scratch now, I updated the docs to explain it.

Because of that, I deprecated this Docker image: https://github.com/tiangolo/uvicorn-gunicorn-fastapi-docker#-warning-you-probably-dont-need-this-docker-image