HAOS uses docker to containerize everything, so it can’t be that difficult, and it really is not. Docker has a —-device flag for this purpose, udev makes it easy enough to assign stable names.
What do you mean by “HAOS on docker”. HAOS is a standalone complete Linux system with its own fully managed kernel, not meant to be containerized. It uses docker internally itself though and “pass through” works transparently.
If you’re talking about running home assistant in a docker container, sure you’re more on your own, but since official home assistant in HAOS must run in docker, none of this is terribly difficult to configure.
The dongles are usually exposed as tty devices and I’ve been running zigbee2mqtt and Zwavejs addons in docker containers for years with no issue.
HAOS takes care of stable naming (based on default udev rules) out of the box.
Unlike system virtualization, there isn’t really anything that needs passing through, it’s a naming and permissions issue - the container just needs an appropriately permissioned dev node ideally with a stable name. If you are using official addons it is effectively zero-config, and if you’re not, sorry but I don’t find the configuration to ensure a dev node to be anything but straightforward container config.
As someone else mentioned it may be as simple as:
devices:
- /dev/ttyUSB0:/dev/ttyUSB0
But you can just as easily use the /dev/serial tree to have stable names. Those names come out of the box with udev. You can always make your own too, I’ve done it, it’s not hard.
