In this post, we’ll explore a practical guide on how to give a Docker container access to a USB device using Docker Compose. This can be particularly useful for applications that need to interact directly with hardware connected to the host machine.
Before proceeding, ensure that you have Docker and Docker Compose installed on your system. Familiarity with basic Docker concepts and command line operations is also recommended.
First, identify the USB device you wish to pass through. This can be done using commands like
dmesg in Linux. These commands help you find the device’s bus and device numbers.
Next, modify your
docker-compose.yml file to include the USB device. Here’s a sample configuration:
version: '3' services: myservice: image: myimage devices: - "/dev/bus/usb/001/002:/dev/bus/usb/001/002"
myservice with your service name,
myimage with your Docker image, and
/dev/bus/usb/001/002 with the path to your USB device.
If you’re running CasaOS you can use my script to update the docker compose or you can use the UI.
bash -c "$(wget -qLO - https://raw.githubusercontent.com/bigbeartechworld/big-bear-scripts/master/casaos-docker-compose-update/run.sh)"
docker-compose.yml file set up, start your Docker Compose:
This command will launch the container with access to the specified USB device.
Make sure the container has the necessary permissions to interact with the USB device. This might involve adjusting permissions on the host for the USB device file.
Passing through a USB device to a Docker container can unlock new capabilities for your containerized applications. By following these steps, you can seamlessly integrate hardware devices with your Docker containers.