### Specify isolation technology for container (--isolation) This option is useful in situations where you are running Docker containers on Windows. The `--isolation=` option sets a container's isolation technology. On Linux, the only supported is the `default` option which uses Linux namespaces. On Microsoft Windows, you can specify these values: * `default`: Use the value specified by the Docker daemon's `--exec-opt` . If the `daemon` does not specify an isolation technology, Microsoft Windows uses `process` as its default value. * `process`: Namespace isolation only. * `hyperv`: Hyper-V hypervisor partition-based isolation. Specifying the `--isolation` flag without a value is the same as setting `--isolation="default"`. ### Dealing with dynamically created devices (--device-cgroup-rule) Devices available to a container are assigned at creation time. The assigned devices will both be added to the cgroup.allow file and created into the container once it is run. This poses a problem when a new device needs to be added to running container. One of the solution is to add a more permissive rule to a container allowing it access to a wider range of devices. For example, supposing our container needs access to a character device with major `42` and any number of minor number (added as new devices appear), the following rule would be added: ``` docker create --device-cgroup-rule='c 42:* rmw' -name my-container my-image ``` Then, a user could ask `udev` to execute a script that would `docker exec my-container mknod newDevX c 42 ` the required device when it is added. NOTE: initially present devices still need to be explicitly added to the create/run command