Files
nixconfig/modules/nixos/data-drives.nix

38 lines
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Nix

# luks-encrypted data drives, unlocked after boot via /etc/crypttab with
# keyfiles from /etc/nixos/keys/<name>.key on the encrypted root.
# Not in boot.initrd.luks on purpose: keyfiles there end up in the initrd
# on the unencrypted /boot.
{ config, lib, ... }:
let
drives = config.local.dataDrives;
in
{
options.local.dataDrives = lib.mkOption {
type = lib.types.attrsOf lib.types.str;
default = { };
example = {
data1 = "dfae62cc-bad1-4879-bf9a-461bde833625";
};
description = "luks name -> luks partition uuid, mounted at /mnt/<name>";
};
config = lib.mkIf (drives != { }) {
environment.etc.crypttab.text = lib.concatStrings (
lib.mapAttrsToList (
name: uuid: "${name} /dev/disk/by-uuid/${uuid} /etc/nixos/keys/${name}.key luks,discard,nofail\n"
) drives
);
fileSystems = lib.mapAttrs' (
name: _:
lib.nameValuePair "/mnt/${name}" {
device = "/dev/mapper/${name}";
fsType = "ext4";
options = [ "nofail" ];
}
) drives;
};
}