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Declare neogaia's encrypted disk with disko

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Add disko as a flake input (following nixpkgs) and wire its NixOS module
into the host-builder, so any Host can declare a disk layout while the
layout itself stays a per-Host concern.

neogaia's layout (hosts/neogaia/disk.nix): one GPT NVMe disk with a
systemd-boot EFI system partition and a LUKS container holding btrfs with
@root/@home/@nix subvolumes. The initrd prompts for the passphrase on a
normal boot. Swap is RAM-backed zram, so there is no on-disk swap
partition; zramSwap is enabled directly for now. The placeholder
fileSystems are removed since disko now derives them.
This commit is contained in:
alexion
2026-07-18 14:09:52 -04:00
parent 4bffa8dede
commit dcd5fdf614
6 changed files with 138 additions and 12 deletions
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24
hosts/neogaia/default.nix
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@@ -1,23 +1,23 @@
{ ... }:
# neogaia — Dell XPS 13 9380 laptop.
#
# The filesystems and hardware profile below are placeholder values, not the
# machine's real encrypted layout.
# The disk layout lives in ./disk.nix (disko); the resulting `fileSystems` are
# derived from it, so none are declared by hand here.
{
imports = [ ./hardware-configuration.nix ];
imports = [
./hardware-configuration.nix
./disk.nix
];
system.stateVersion = "26.05";
# systemd-boot on the EFI system partition disko creates. The initrd prompts
# for the LUKS passphrase (disko wires up boot.initrd.luks.devices), so a
# normal boot unlocks the encrypted root.
boot.loader.systemd-boot.enable = true;
boot.loader.efi.canTouchEfiVariables = true;
# Placeholder label-based filesystems.
fileSystems."/" = {
device = "/dev/disk/by-label/nixos";
fsType = "ext4";
};
fileSystems."/boot" = {
device = "/dev/disk/by-label/BOOT";
fsType = "vfat";
};
# Swap is RAM-backed zram rather than an on-disk partition. Task 0003 lifts
# this into the zram toggle Module; enabled directly here for now.
zramSwap.enable = true;
}