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This subfolder is dedicated to dracut related files.

The folder 'dnbd3-rootfs' is a dracut module used to setup a client's rootfs based on a (read-only) dnbd3 export made writable through the kernel device mapper features.

To use this module within dracut, you simply need to copy/link/mount the above mentioned folder to '/usr/lib/dracut/modules.d' prefixed with a numerical priority. We used '90' so far, so the module was linked to '/usr/lib/dracut/modules.d/90dnbd3-rootfs'.

Once the module has been integrated in dracut's modules, you can build the initramfs with the following command:

dracut --no-hostonly --modules "dnbd3-rootfs" <target_path>

Note that the '--no-hostonly' is critical if the machine dracut is executed on and the clients supposed to boot the resulting initramfs differ.

For more informations see: https://lab.ks.uni-freiburg.de/projects/dracut-praktikum/wiki