DevOps: Puppet, Docker, and Kubernetes

Accessing the host device inside the container

From Docker 1.2 onwards, we can give access of the host device to a container with the --device option to the run command. Earlier, one has bind mount it with the -v option and that had to be done with the --privileged option.

Getting ready

Make sure the Docker daemon is running on the host and you can connect through the Docker client. You will also need a device to pass to the container.

How to do it…

1. You can give access of a host device to the container using the following syntax:

   $ docker run --device=<Host Device>:<Container Device Mapping>:<Permissions>   [ OPTIONS ]  IMAGE[:TAG]  [COMMAND]  [ARG...]
   

Here is an example of a command:

$ docker run --device=/dev/sdc:/dev/xvdc -i -t fedora /bin/bash

How it ...