No devices detected in balenaOS Docker container

[iKK001]

Any idea why this library does not work when executed inside a balenaOS docker container ?

I am not sure whether it is the library or whether it is the combination within the docker service.

Fact is that lsusb cmd works when logged into the running docker image. Also /dev shows the USB-device correctly as ttyUSB0 when observing in a terminal inside the running docker image. So the usb-detection library does not recognize this for some reason.

Everything works when locally running my code on a Mac. I can detect plugging a USB-device and the usb-detection library gives me the callback:

import usbDetect from "usb-detection"
usbDetect.startMonitoring()
usbDetect.on("add", () => {
     // only works when run locally on a Mac - but does not work inside a bridged balenaOS docker service !!!!!!!
}

I do ENV UDEV=1 in my Dockerfile and add priviledge: true to the service in docker-compose.yml file. But it does not seem to work.

Any idea why ??

[Julusian]

I have a feeling that on mac docker containers are run inside a linux vm. Or there will be some other translation layer going on as docker is a linux only thing.
So maybe it will work if you can get the usb devices passed through into that docker vm/whatever, but in doing so they may no longer be available to macos.

A while back I tried to make a node application which used usb to work in docker (only considering being run on a linux machine), and gave up trying to get that working as there were many problems to workaround with doing usb in docker

[MadLittleMods]

@iKK001 Please update this issue with your workaround and cross-link your forum post: #123 (comment)