Debug mode?

[wshayes]

Trying to figure out how to turn on auto-reloading (e.g. debug mode) while using docker. I develop in the docker container by volume mounting the app directory into the docker container so any changes I make to the code are available immediately inside the running docker container. I can't figure out how to start debug mode using gunicorn with uvicorn.

Any ideas?

PS Great project and thanks!

[rudmac]

just create a env GUNICORN_CMD_ARGS="--reload"

http://docs.gunicorn.org/en/stable/settings.html#reload

or you can insert into gunicorn-conf.py

reload = True

[wshayes]

Aarrgghhh! Yes that works great - read somewhere that didn’t work and didn’t test it. Shame on me.

Thanks!

Thanks also for the env tip - works great with Docker compose.

[tiangolo]

@wshayes

Great project and thanks!

Awesome! I'm glad it's working for you.

@rudmac Thanks for your help here! It's very appreciated. 👏 🌮

---

There's a new integrated script /start-reload.sh specifically for this.

It runs only Uvicorn with --reload, optimal for development.

Check the updated docs here: https://github.com/tiangolo/uvicorn-gunicorn-fastapi-docker#development-live-reload

[wshayes]

Thanks - I'll update the writeup I made for it: https://medium.com/@williamhayes/fastapi-starlette-debug-vs-prod-5f7561db3a59 (future note for myself (ever searched for a solution to a problem and find an old post with the answer - still undecided if it is embarrassing or an example of impressive forethought))

FYI - looks like --reload and --debug are equivalent currently in uvicorn. I'll make a note of that as well.

[tiangolo]

Thanks! And great post!

In Uvicorn, --debug was the "standard" up to 0.5.0, now it will be --reload, it's very recent.

Check: fastapi/fastapi#66

[ermarkar]

I have tried

uvicorn.run(self.app, host=host, port=port, debug=True)

and this

uvicorn.run(self.app, host=host, port=port, reload=True)

not working in VSCode

[mironnn]

Can reloading be working without a gunicorn?

[wshayes]

Can reloading be working without a gunicorn?

Not easily without either uvicorn or gunicorn. It's possible to replicate reload without it, but you still need an ASGI server to run FastAPI anyway.