Add a dracutlukscfg module to write a
/etc/dracut.conf.d/calamares-luks.conf file for LUKS full disk
encryption support with Dracut.
You should run:
* partition
* luksbootkeyfile
* dracutlukscfg
* dracut
in that order (not necessarily in immediate sequence). The
luksopenswaphook module is not used with Dracut.
