feat: add encryption

hosts/framework-work/INSTALL-LUKS.md

@@ -0,0 +1,126 @@
+# Framework Work LUKS Reinstall
+
+This host uses the standard NixOS encrypted-root layout for a laptop:
+
+- UEFI `/boot` remains unencrypted so `systemd-boot` can load the kernel and initrd.
+- The root partition is a LUKS container opened as `/dev/mapper/cryptroot`.
+- `/` is an ext4 filesystem inside that LUKS container.
+- The old plain swap partition is removed. Swap is provided by the global `zramSwap` config.
+- GNOME autologin is enabled only when a LUKS root is configured, so boot requires the LUKS passphrase and screen unlock still requires the `jet` password.
+
+This follows the NixOS manual's manual install flow and the NixOS encrypted-root examples. It also matches what the Oneleet agent checks: root must be mounted from a `crypt` block-device stack.
+
+## Current Device Map
+
+- Internal disk: `/dev/nvme0n1`
+- EFI partition: `/dev/nvme0n1p1`, UUID `D21C-F860`
+- Root partition to encrypt: `/dev/nvme0n1p2`, PARTUUID `90aab143-4d2f-4a77-b08e-95fad9ee08af`
+- Old plain swap partition to remove: `/dev/nvme0n1p3`
+
+## Before Rebooting To The Installer
+
+Back up the config and SSH keys to the EFI partition. The SSH key backup is temporarily stored on unencrypted `/boot`; delete it after the reinstall succeeds.
+
+```bash
+sudo tar -C /home/jet/Documents -czf /boot/nix-config-before-luks.tar.gz nix-config
+sudo tar -C /home/jet -czf /boot/jet-ssh-before-luks.tar.gz .ssh
+```
+
+## Installer Commands
+
+Boot the NixOS USB installer, open a terminal, and verify the disk layout first:
+
+```bash
+lsblk -o NAME,PATH,SIZE,FSTYPE,MOUNTPOINTS,PARTUUID,UUID
+```
+
+Stop any active swap, remove the old plain swap partition, and expand the root partition to the end of the disk:
+
+```bash
+sudo swapoff -a || true
+sudo parted /dev/nvme0n1 --script rm 3
+sudo parted /dev/nvme0n1 --script resizepart 2 100%
+sudo partprobe /dev/nvme0n1
+sudo udevadm settle
+```
+
+Verify that partition 2 still has the expected PARTUUID. If it changed, update `hosts/framework-work/hardware-configuration.nix` before installing.
+
+```bash
+lsblk -o NAME,SIZE,PARTUUID /dev/nvme0n1
+```
+
+Create and open the LUKS root container:
+
+```bash
+sudo cryptsetup luksFormat /dev/disk/by-partuuid/90aab143-4d2f-4a77-b08e-95fad9ee08af
+sudo cryptsetup open /dev/disk/by-partuuid/90aab143-4d2f-4a77-b08e-95fad9ee08af cryptroot
+```
+
+Create the root filesystem and mount it with the existing EFI partition:
+
+```bash
+sudo mkfs.ext4 -L nixos-root /dev/mapper/cryptroot
+sudo mount /dev/mapper/cryptroot /mnt
+sudo mkdir -p /mnt/boot
+sudo mount /dev/disk/by-uuid/D21C-F860 /mnt/boot
+```
+
+Restore this config and SSH keys:
+
+```bash
+sudo mkdir -p /mnt/home/jet/Documents /mnt/home/jet
+sudo tar -C /mnt/home/jet/Documents -xzf /mnt/boot/nix-config-before-luks.tar.gz
+sudo tar -C /mnt/home/jet -xzf /mnt/boot/jet-ssh-before-luks.tar.gz
+sudo chown -R 1000:100 /mnt/home/jet
+sudo chmod 700 /mnt/home/jet/.ssh
+sudo chmod 600 /mnt/home/jet/.ssh/id_ed25519
+```
+
+Install NixOS from the flake:
+
+```bash
+sudo nixos-install --flake /mnt/home/jet/Documents/nix-config#framework-work
+```
+
+Set the `jet` password for screen unlock and sudo:
+
+```bash
+sudo nixos-enter --root /mnt -c 'passwd jet'
+```
+
+Remove the temporary unencrypted SSH key backup, then reboot:
+
+```bash
+sudo rm -f /mnt/boot/jet-ssh-before-luks.tar.gz
+sudo reboot
+```
+
+## After First Boot
+
+Check the block-device stack:
+
+```bash
+lsblk -o NAME,TYPE,FSTYPE,MOUNTPOINTS
+findmnt -no SOURCE,FSTYPE /
+```
+
+Expected shape:
+
+```text
+nvme0n1p2 crypto_LUKS
+└─cryptroot ext4 /
+```
+
+Then restart Oneleet and rerun the check:
+
+```bash
+sudo systemctl restart oneleet-daemon
+systemctl status oneleet-daemon
+```
+
+## References Checked
+
+- NixOS manual, manual installation and UEFI `/boot` mounting flow: `https://nixos.org/manual/nixos/stable/`
+- NixOS Wiki, Full Disk Encryption examples: `https://nixos.wiki/wiki/Full_Disk_Encryption`
+- ArchWiki, dm-crypt encrypted root tradeoffs and LUKS-on-partition layout: `https://wiki.archlinux.org/title/Dm-crypt/Encrypting_an_entire_system`

hosts/framework-work/default.nix

@@ -1,4 +1,8 @@
-{ ... }:
+{ config, lib, ... }:
+
+let
+  hasLuksDevice = config.boot.initrd.luks.devices != { };
+in
 
 {
   imports = [
@@ -9,6 +13,15 @@
 
   networking.hostName = "framework-work";
 
+  # Once root is LUKS-encrypted, the disk passphrase is the boot password.
+  # GDM autologin avoids entering a second password after the disk is unlocked.
+  services.displayManager.autoLogin = {
+    enable = hasLuksDevice;
+    user = "jet";
+  };
+
+  swapDevices = lib.mkForce [ ];
+
   fileSystems."/tmp" = {
     device = "tmpfs";
     fsType = "tmpfs";

hosts/framework-work/hardware-configuration.nix

@@ -22,8 +22,13 @@
   boot.kernelModules = [ "kvm-amd" ];
   boot.extraModulePackages = [ ];
 
+  boot.initrd.luks.devices.cryptroot = {
+    device = "/dev/disk/by-partuuid/90aab143-4d2f-4a77-b08e-95fad9ee08af";
+    allowDiscards = true;
+  };
+
   fileSystems."/" = {
-    device = "/dev/disk/by-uuid/dfaa8624-c14f-4a72-8c5a-193d8294e5cb";
+    device = "/dev/mapper/cryptroot";
     fsType = "ext4";
     options = [ "noatime" ];
   };
@@ -37,12 +42,7 @@
     ];
   };
 
-  swapDevices = [
-    {
-      device = "/dev/disk/by-uuid/bd8d2630-7c9b-4ec1-8a00-b1a801003732";
-      priority = -10;
-    }
-  ];
+  swapDevices = [ ];
 
   nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
   hardware.cpu.amd.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;