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infra/modules/unlock-zfs-on-boot/default.nix

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Nix

{ flake, config, ... }: {
# From https://nixos.wiki/wiki/ZFS#Unlock_encrypted_zfs_via_ssh_on_boot
boot.initrd.network = {
enable = true;
ssh = {
enable = true;
# To prevent ssh clients from freaking out because a different host key is used,
# a different port for ssh is useful (assuming the same host has also a regular sshd running)
port = 2222;
# Please create this manually the first time.
hostKeys = [ "/etc/secrets/initrd/ssh_host_ed25519_key" ];
authorizedKeys = config.pub-solar-os.authentication.sshPubKeys;
};
# this will automatically load the zfs password prompt on login
# and kill the other prompt so boot can continue
postCommands = ''
cat <<EOF > /root/.profile
if pgrep -x "zfs" > /dev/null
then
zfs load-key -a
killall zfs
else
echo "zfs not running -- maybe the pool is taking some time to load for some unforseen reason."
fi
EOF
'';
};
}