Need help fixing USB passthrough on a Docker LXC

[btehan]

I have a LXC with docker setup via the script and USB pass through was working great for a long while. Then the LXC bootdisk filled up, so that stopped the LXC from working correctly. I expanded the bootdisk then ran the new cleanup script and three of my four docker containers are back to a working state. However, I'm running rtlamr2mqtt and it's failing to start as it can't find the USB radio I had passed through to it. Here's my LXC config:

Docker LXC

https%3A//tteck.github.io/Proxmox/

#
##lxc.cgroup2.devices.allow%3A c 226%3A128 rwm
arch: amd64
cores: 4
features: mount=cifs,nesting=1
hostname: docker
memory: 8192
net0: name=eth0,bridge=vmbr0,hwaddr=7E:4E:D9:D4:51:5F,ip=dhcp,type=veth
onboot: 1
ostype: debian
rootfs: VM_LXC:subvol-107-disk-0,size=100G
swap: 512
lxc.cgroup2.devices.allow: a
lxc.cgroup2.devices.allow: c 226:0 rwm
lxc.cgroup2.devices.allow: c 29:0 rwm
lxc.cgroup2.devices.allow: c 189:* rwm
lxc.cgroup2.devices.allow: c 120:* rwm
lxc.cgroup2.devices.allow: c 195:* rwm
lxc.cgroup2.devices.allow: c 234:* rwm
lxc.cgroup2.devices.allow: c 505:* rwm
lxc.mount.entry: /dev/bus/usb/007/002 /dev/bus/usb/007/002 none bind,optional,create=file
lxc.mount.entry: /dev/nvidia0 dev/nvidia0 none bind,optional,create=file
lxc.mount.entry: /dev/nvidiactl dev/nvidiactl none bind,optional,create=file
lxc.mount.entry: /dev/nvidia-uvm dev/nvidia-uvm none bind,optional,create=file
lxc.mount.entry: /dev/nvidia-caps dev/nvidia-caps none bind,optional,create=file
lxc.mount.entry: /dev/nvidia-uvm-tools dev/nvidia-uvm-tools none bind,optional,create=file
lxc.apparmor.profile: unconfined
lxc.mount.entry: /dev/apex_0 dev/apex_0 none bind,optional,create=file 0, 0
lxc.mount.entry: /dev/dri/renderD128 dev/dri/renderD128 none bind,optional,create=file 0, 0
lxc.mount.entry: /dev/dri/card0 dev/dri/card0 none bind,optional,create=file
lxc.cap.drop:
lxc.mount.auto: cgroup:rw
lxc.autodev: 1

In the GUI, under LXC >> Options it's listed as "No" for "Unprivileged container"

Here's the USB radio on the host:

root@pve:# lsusb | grep DVB
Bus 007 Device 002: ID 0bda:2838 Realtek Semiconductor Corp. RTL2838 DVB-T
root@pve:# ls -lh /dev/bus/usb/007/002
crw-rw-r-- 1 root root 189, 769 Feb 8 17:29 /dev/bus/usb/007/002

I installed lsusb in the LXC container and lsusb sees it, but the directory isn't getting built:

root@docker:/home/containers# lsusb | grep DVB
Bus 007 Device 002: ID 0bda:2838 Realtek Semiconductor Corp. RTL2838 DVB-T
root@docker:/home/containers# ls -lh /dev/bus/usb/007/002
ls: cannot access '/dev/bus/usb/007/002': No such file or directory

Here's the part of the docker compose file for rtlamr2mqtt:

rtlamr:
container_name: rtlamr2mqtt
image: allangood/rtlamr2mqtt
restart: unless-stopped
devices:
- /dev/bus/usb
volumes:
- /home/containers/rtlamr2mqtt/rtlamr2mqtt.yaml:/etc/rtlamr2mqtt.yaml:ro
- /opt/rtlamr2mqtt/data:/var/lib/rtlamr2mqtt

I've been banging my head against this for days and I'm getting nowhere. Could someone give me a hand, please?

[btehan]

Wrong:

lxc.mount.entry: /dev/bus/usb/007/002 /dev/bus/usb/007/002 none bind,optional,create=file

Correct:

lxc.mount.entry: /dev/bus/usb/007/002 dev/bus/usb/007/002 none bind,optional,create=file

I removed the leading slash on the second dev, worked. 🤦‍♂️