Ubuntu 22 LTS on root created with installer has keylocation as prompt and keyformat as raw, cant unlock

[ncrmro]

Typically I use the OpenZFS docs to manually install but I guess I tried the Ubuntu installer version. I moved my SSD to a new laptop and sent this snapshot to my NAS.

I had trouble getting the SSD to boot in new laptop, and from installer disk went to unlock and try to reinstall grub. I had to force import rpool. It seemed to thing that the keylocation was on a file somewhere and the password is raw, changing the keyformat to prompt say I couldnt enter a raw type.

The ubuntu installer shell script seemed to also have an encryption biT

The snapshot on my nas seems to have a keylocation of prompt and a keyformat of raw and thus I cant unlock that either.

I cant change the keyformat as it's read only.

Was wondering what I can do to unlock this dataset as even If I put the password on a file it says its to short.

[ncrmro]

So upon further investigation this version of the ZFS install script creates a volume called rpool/keystore. This I think is LUKS encrypted with your password and the actual key is randomly generated.

[ncrmro]

This pretty much did what I needed.

sudo cryptsetup luksOpen /dev/zvol/.... keystore-rpool
mkdir /tmp/keystore
sudo mount /dev/mapper/keystore-rpool /tmp/keystore
sudo zfs set keylocation=file:///tmp/keystore/system.key