Phobos: Change filesystem to be encrypted+stateless

2 files changed, 30 insertions, 9 deletions

diff --git a/hosts/phobos/default.nix b/hosts/phobos/default.nix
index 5bdd524..c31d832 100644
--- a/hosts/phobos/default.nix
+++ b/hosts/phobos/default.nix
@@ -1,6 +1,8 @@
 { config, pkgs, lib, secrets, hostname, inputs, user, ... }: {
 
   imports = [
+    "${inputs.impermanence}/nixos.nix"
+
     ./hardware.nix
 
     ../../modules/bluetooth
@@ -35,6 +37,17 @@
     '';
   */
 
+  environment.persistence."/persist" = {
+    directories = [
+      "/var/log"
+      "/var/lib"
+    ];
+    files = [
+      "/etc/machine-id"
+      "/etc/nix/id_rsa"
+    ];
+  };
+
   environment.etc."nix-index/files".source = inputs.nix-index.legacyPackages.x86_64-linux.database;
 
 }
diff --git a/hosts/phobos/hardware.nix b/hosts/phobos/hardware.nix
index 4833668..478449b 100644
--- a/hosts/phobos/hardware.nix
+++ b/hosts/phobos/hardware.nix
@@ -15,29 +15,37 @@ in
     kernelParams = [ "net.ifnames=0" "biosdevname=0" "iomem=relaxed" "mitigations=off" ];
   };
 
+  fileSystems."/" = {
+    device = "none";
+    fsType = "tmpfs";
+  };
+
   fileSystems."/boot" = {
     device = "/dev/disk/by-uuid/0A8B-3968";
     fsType = "vfat";
   };
 
-  fileSystems."/" = {
-    device = "/dev/disk/by-uuid/9a450653-8369-4850-af4f-cbec7cac8a99";
-    fsType = "btrfs";
-    options = [ "subvol=root" "compress-force=zstd" "noatime" ];
-  };
+  boot.initrd.luks.devices."encrypted_root".device = "/dev/disk/by-uuid/095dc267-9281-4535-9491-b3fcded614a8";
 
-  fileSystems."/home" = {
-    device = "/dev/disk/by-uuid/9a450653-8369-4850-af4f-cbec7cac8a99";
+  fileSystems."/persist" = {
+    device = "/dev/mapper/encrypted_root";
     fsType = "btrfs";
-    options = [ "subvol=home" "compress-force=zstd" ];
+    neededForBoot = true;
+    options = [ "subvol=persist" "compress-force=zstd" "noatime" ];
   };
 
   fileSystems."/nix" = {
-    device = "/dev/disk/by-uuid/9a450653-8369-4850-af4f-cbec7cac8a99";
+    device = "/dev/mapper/encrypted_root";
     fsType = "btrfs";
     options = [ "subvol=nix" "compress-force=zstd" "noatime" ];
   };
 
+  fileSystems."/home" = {
+    device = "/dev/mapper/encrypted_root";
+    fsType = "btrfs";
+    options = [ "subvol=home" "compress-force=zstd" ];
+  };
+
   swapDevices = [ ];
 
   powerManagement.cpuFreqGovernor = powerMode;