Comment 4 for bug 1238275

I ran into the same issue, in that cryptsetup's initramfs-tools hook (/usr/share/initramfs-tools/hooks/cryptroot) doesn't currently handle ZFS pools. I've modified the hook to add this functionality. It should be able to handle complicated pool configurations (e.g., multiple vdevs, ZIL, spares, etc.), but I've been able to give it only limited testing within single-vdev pools. I am putting my patches into the public domain.