1 files changed, 86 insertions, 0 deletions

diff --git a/hosts/skadhi/fs.nix b/hosts/skadhi/fs.nix
new file mode 100644
index 00000000..41ef24f6
--- /dev/null
+++ b/hosts/skadhi/fs.nix
@@ -0,0 +1,86 @@
+{ flake, flakeInputs, pkgs, config, lib, ... }:
+{
+  imports = with flake.nixosModules.systemProfiles; [
+    disko
+  ];
+
+  config = {
+    fileSystems."/persistent".neededForBoot = true;
+    environment.persistence."/persistent" = {
+      hideMounts = true;
+      directories = [
+        "/nix"
+        "/root"
+        "/var/log"
+        "/var/lib/nixos"
+        "/var/lib/sops-nix"
+        "/var/lib/systemd"
+        "/var/lib/fprint"
+        "/var/lib/chrony"
+        "/var/lib/postfix"
+        config.boot.lanzaboote.pkiBundle
+      ];
+    };
+
+    disko.devices = {
+      disk.nvm = {
+        type = "disk";
+        device = "/dev/nvme0n1";
+        content = {
+          type = "gpt";
+          partitions = {
+            ESP = {
+              size = "512M";
+              type = "EF00";
+              content = {
+                type = "filesystem";
+                format = "vfat";
+                mountpoint = "/boot";
+                mountOptions = [
+                  "fmask=0033" "dmask=0022"
+                ];
+              };
+            };
+            luks = {
+              size = "100%";
+              content = {
+                type = "luks";
+                name = "nvm";
+                extraFormatArgs = [
+                  "--cipher" "aegis128-random"
+                  "--key-size" "128"
+                  "--integrity" "aead"
+                ];
+                content = {
+                  type = "btrfs";
+                  extraArgs = let
+                    dirs = map (p: "/persistent/${p}") ["/etc"];
+                    subvols = ["/persistent"] ++ map (p: "/persistent/${p}") ["/nix" "/var/log"];
+                    restricted = map (p: "/persistent/${p}") ["/root"];
+                  in [
+                    "--csum" "blake2"
+                    "--compress" "zstd:15"
+                    "--rootdir" (toString (pkgs.runCommand "rootdir" {
+                    } ''
+                      mkdir $out
+                      install -d ${lib.concatMapStringsSep " " (p: "$out/${p}") (dirs ++ subvols)}
+                      install -m 0700 -d ${lib.concatMapStringsSep " " (p: "$out/${p}") restricted}
+                      ln -s /etc/zoneinfo/UTC /persistent/etc/localtime
+                    ''))
+                  ] ++ lib.concatMap (p: ["--subvol" p]) (subvols ++ restricted);
+                  subvolumes = {
+                    "/persistent".mountpoint = "/persistent";
+                    "/swap" = {
+                      mountpoint = "/.swap";
+                      swap.swapfile.size = "96G";
+                    };
+                  };
+                };
+              };
+            };
+          };
+        };
+      };
+    };
+  };
+}