I cannot map my usb device with the home assistant container.
$ ls -l /dev/ttyUSB0
crw-rw---- 1 root dialout 188, 0 nov 27 09:28 /dev/ttyUSB0
$ groups
adm dialout sudo audio kvm lpadmin docker
I mapped ttyUSB0 device in my docker compose file:
version: '3'
services:
homeassistant:
container_name: homeassistant
image: "ghcr.io/home-assistant/home-assistant:stable"
restart: unless-stopped
volumes:
- ./homeassistant/config:/config
- /etc/localtime:/etc/localtime:ro
devices:
- /dev/ttyUSB0:/dev/ttyUSB0
network_mode: host
And this is the error when I run the container:
$ docker compose up
Error response from daemon: error gathering device information while adding custom device "/dev/ttyUSB0": no such file or directory
If I add the priviliged property to the compose file I can run the container but I get this error when serial port is used (I’d rather not enable privileged mode…):
priviliged: true
devices:
- /dev/ttyUSB0:/dev/ttyUSB0
And this is the error:
homeassistant | File "/usr/local/lib/python3.10/site-packages/serial/__init__.py", line 90, in serial_for_url
homeassistant | instance.open()
homeassistant | File "/usr/local/lib/python3.10/site-packages/serial/serialposix.py", line 325, in open
homeassistant | raise SerialException(msg.errno, "could not open port {}: {}".format(self._port, msg))
homeassistant | serial.serialutil.SerialException: [Errno 2] could not open port /dev/ttyUSB0: [Errno 2] No such file or directory: '/dev/ttyUSB0'
If I run docker compose up with sudo all works correctly, so I think it’s just a permissions issue.
I can’t figure out how to correctly map the USB device to the container.