refactor: switch from using UUIDs for filesystems to partlabels. Requires partition modifications on hosts before rebuild

hosts/vergil/hardware.nix

@@ -8,6 +8,7 @@
 {
   imports = [
     (modulesPath + "/installer/scan/not-detected.nix")
+    ../shared/fs-layouts/single-disk-xfs.nix
   ];
 
   boot = {
@@ -25,36 +26,26 @@
       kernelModules = [ ];
     };
 
-    kernelModules = [ "kvm-intel" ];
+    kernelModules = [ ];
     extraModulePackages = [ ];
   };
 
-  fileSystems = {
-    "/" = {
-      device = "/dev/disk/by-uuid/05376a0d-18d1-4e7b-8f75-fe052a5636ac";
-      fsType = "xfs";
-    };
+  # DO NOT mount by partlabel or other value other than UUID.
+  # Disk is a child of a VM disk from PROXMOX and WILL NOT
+  # be picked up automatically elsewise.
+  fileSystems."/mnt" = {
+    device = "/dev/disk/by-uuid/1432aeae-71e9-4f34-97dc-cf0fe74a4e00";
+    fsType = "xfs";
 
-    "/boot" = {
-      device = "/dev/disk/by-uuid/631D-23D2";
-      fsType = "vfat";
-      options = [
-        "fmask=0077"
-        "dmask=0077"
-      ];
-    };
-
-    "/mnt" = {
-      device = "/dev/disk/by-uuid/1432aeae-71e9-4f34-97dc-cf0fe74a4e00";
-      fsType = "xfs";
-      options = [
-        "noauto"
-        "x-systemd.automount"
-        "x-systemd.after=mount-vm-disk.service"
-      ];
-    };
+    options = [
+      "noauto"
+      "x-systemd.automount"
+      "x-systemd.after=mount-vm-disk.service"
+    ];
   };
 
+  # Vergil doesn't have a swap device but ../shared/fs-layouts/single-disk-xfs.nix defines one.
+  # This shouldn't be an issue at runtime but explicit removal reduces log spam.
   swapDevices = [ ];
   nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
   hardware.cpu.intel.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;