Proxmox USB to LXC Passthrough

gistfile1.txt

Based off of a lot of mess and reading:

https://asokolsky.github.io/proxmox/octoprint.html
https://medium.com/@konpat/usb-passthrough-to-an-lxc-proxmox-15482674f11d
https://linuxcontainers.org/lxc/manpages/man5/lxc.container.conf.5.html

However, I think that some of the general confusion is due to not understand what all of the different steps, commands, and files are doing.

I managed to get it all to work reliably, and simply in 2 basic steps.

Step 1) Find the USB you want to pass from the host to the lxc, and make sure it doesn't move.

To find the usb you want:
root@host: lsusb

This will give you an ID number made of the vendor and the product, seperated by a colon.
Use the ID number and the known subsystem in a new udev role to symlink the usb device to any name you like.
Reload the udev roles and look run:
root@host: ls -la /dev

you will find a symlink from the orginal device to one you have named in the udev roles

Step 2) Mount that symlink in the lxc

edit /etc/pve/lxc/<lxc-id>.conf to include
lxc.mount.entry: <source in host> <destination in lxc> none bind,optional,create=file
USE THE SYMLINK YOU MADE IN STEP ONE AS THE SOURCE!!!!!!

restart the lxc and your done!

use user@lxc: lsusb and user@lxc: ls -la /dev to confirm it worked.