Hello, I have a crypted /home (/dev/mapper/lvm-home) inside lvm, and a keyfile on /boot (/dev/sda1): /boot/keyfile
Why: On normal days, it boot automatically, but on vacations/trips I delet the /boot/keyfile and people can't access.
On ArchLinux it worked with:
[ /etc/default/grub ]
GRUB_CMDLINE_LINUX="cryptdevice=/dev/mapper/lvm-home:home cryptkey=/dev/sda1:ext4:/.boot root=/dev/mapper/lvm-funtoo dolvm rootfstype=ext4"
and before: grub-mkconfig -o /boot/grub/grub.cfg
On Funtoo I tried the same and:
[ /etc/crypttab ]