Hi all! Brand new to Prefect today, I can run it locally without issues but after building with

Dockerfile

I'm unable to connect to the UI from my local no matter what I try. I've tried @Cole Murray’s suggestion of mapping port 4200, passing

--network host

, etc. but I'm getting "Empty reply from server" when I try to curl it. This is the full

docker run

command I'm running, TIA for any suggestions!

docker run --rm --name prefect -p 4200:4200 prefecthq/prefect:dev-python3.7 prefect orion start

I believe you'll also need to set the

PREFECT_ORION_API_HOST

environment variable to 0.0.0.0. Otherwise it starts up on 127.0.0.1, which won't be visible outside the container.

Ah perfect, thanks @Ryan Peden! I had a hunch it had to do with getting the webserver to listen on

0.0.0.0

but wasn't sure of the exact environment variable to pass. Works like a charm, thanks!

You can also set this in the

prefect orion start

command with the

--host

parameter 🙂