Booting Gentoo on LVM inside LUKS with gpg encrypted keyfile

Question

I'm trying to install Gentoo on LVM logical volume inside LUKS container encrypted with key file encrypted by GPG with passphrase. Everything was going smoothly until I tried to boot. I'm building the kernel and initramfs with genkernel:

genkernel --lvm --luks --install --menuconfig --busybox all   

and booting it with GRUB2. So after I start the kernel I get the information that my key file gets found, but in the next line I get “Failed to open LUKS device...” and than comes a kernel panic. Any idea what to do?

Kernel config - http://pastebin.com/YR7TfaVm

GRUB2 menuentry:

menuentry 'Gentoo'{
root='hd1,gpt1'
linux /kernel-genkernel-x86_64-3.17.7-gentoo initrd=/dev/ram0 crypt_root=/dev/disk/by-partuuid/PARTUUID_OF_LUKS_CONTAINTER_PARTION dolvm real_root=/dev/mapper/vg1-root rootfstype=ext4 real_init=/usr/lib/systemd/systemd root_keydev=/dev/disk/by-partuuid/PARTUUID_OF_MY_PENDRIVE_WITH_KEY root_key=luks-key.gpg
initrd /initramfs-genkernel-x86_64-3.17.7-gentoo
echo "initing..."
}

Answer 1

My problem got solved after changing kernel version to 3.10 and changing gpg version to an old one, that wasn't requiring pinentry to work and that i compiled statically. Although with new version i checked everything twice there always seemed to be an problem with pinentry. Also I think that genkernel wasn't including pinentry automatically. I had to include it myself.

So to summarize:

• check if your gpg version requires pinentry (I my case I reverted to an older version to make the initrd)
• consider more stable kernel version
• consider compiling gpg statically
• check all library dependents after generating initrd even if you used something like genkernel