Uvicorn ignores --uds and --fd configs

I’m using uvicorn with supervisor and nginx

I’m trying to use the unix socket but it keep using the host and port

here is my supervisor conf file:

[fcgi-program:tas]
enviroment=DJANGO_SETTINGS_MODULE="maq_tasks.settings",DJANGO_ASGI_MODULE="maq_tasks.asgi",LOG_LEVEL="debug",WORKERS="3"
directory=/home/tas/src/
socket=unix:///home/tas/run/uvicorn.sock
command=/home/tas/bin/uvicorn maq_tasks.asgi:application --workers 3 --log-level debug --fd 0
user=tas
autostart=true
autorestart=true
redirect_stderr=true
stdout_logfile=/home/tas/logs/uvicorn-error.log

and here is my error

Traceback (most recent call last):
  ....
  File "/home/tas/lib/python3.6/site-packages/click/core.py", line 764, in __call__
    return self.main(*args, **kwargs)
  File "/home/tas/lib/python3.6/site-packages/click/core.py", line 717, in main
    rv = self.invoke(ctx)
  File "/home/tas/lib/python3.6/site-packages/click/core.py", line 956, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/home/tas/lib/python3.6/site-packages/click/core.py", line 555, in invoke
    return callback(*args, **kwargs)
  File "/home/tas/lib/python3.6/site-packages/uvicorn/main.py", line 257, in main
    run(**kwargs)
  File "/home/tas/lib/python3.6/site-packages/uvicorn/main.py", line 274, in run
    socket = config.bind_socket()
  File "/home/tas/lib/python3.6/site-packages/uvicorn/config.py", line 219, in bind_socket
    sock.bind((self.host, self.port))
OSError: [Errno 98] Address already in use

[eseglem]

It would be nice to add this to the documentation at least. The docs state that --workers doesn’t work with --reload but does not mention issues with --uds or '–fd`. So, the only way to understand why reload is not working when using a socket, is this closed ticket on GitHub.

[Frechetta]

I believe this is an important feature to have. In my situation, I use a unix socket for production, and I want the reload functionality for development. Since I run my application like production while I develop, it would be useful to be able to use reload and a unix socket together so that I don’t have to implement special code to handle this case.