WIP: cross compile skrott

Reviewed-on: https://git.pvv.ntnu.no/Drift/pvv-nixos-config/pulls/121

README.md

@@ -43,6 +43,7 @@ revert the changes on the next nightly rebuild (tends to happen when everybody i
 | [kommode][kom]             | Virtual  | Gitea + Gitea pages                                       |
 | [lupine][lup]              | Physical | Gitea CI/CD runners                                       |
 |  shark                     | Virtual  | Test host for authentication, absolutely horrendous       |
+| [skrott][skr]              | Physical | Kiosk, snacks and soda                                    |
 | [wenche][wen]              | Virtual  | Nix-builders, general purpose compute                     |
 
 ## Documentation
@@ -59,4 +60,5 @@ revert the changes on the next nightly rebuild (tends to happen when everybody i
 [ild]: https://wiki.pvv.ntnu.no/wiki/Maskiner/ildkule
 [kom]: https://wiki.pvv.ntnu.no/wiki/Maskiner/kommode
 [lup]: https://wiki.pvv.ntnu.no/wiki/Maskiner/lupine
+[skr]: https://wiki.pvv.ntnu.no/wiki/Maskiner/Skrott
 [wen]: https://wiki.pvv.ntnu.no/wiki/Maskiner/wenche

base/default.nix

@@ -81,7 +81,7 @@
     AllowHibernation=no
   '';
 
-  users.mutableUsers = lib.mkDefault false;
+  # users.mutableUsers = lib.mkDefault false;
 
   users.groups."drift".name = "drift";
 

flake.lock

@@ -8,11 +8,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1768138611,
-        "narHash": "sha256-KfZX6wpuwE2IRKLjh0DrEviE4f6kqLJWwKIE5QJSqa4=",
+        "lastModified": 1769362210,
+        "narHash": "sha256-QCQD7Ofin5UYL0i5Sv34gfJ0p5pv1hwZspE/Ufe84L8=",
         "ref": "main",
-        "rev": "cb385097dcda5fb9772f903688d078b30a66ccd4",
-        "revCount": 221,
+        "rev": "1d01e1b2cb8fb2adee96c0b4f065c43c45eae290",
+        "revCount": 229,
         "type": "git",
         "url": "https://git.pvv.ntnu.no/Projects/dibbler.git"
       },

flake.nix

@@ -69,8 +69,7 @@
   in {
     inputs = lib.mapAttrs (_: src: src.outPath) inputs;
 
-    pkgs = forAllSystems (system:
-      import nixpkgs {
+    pkgs = forAllSystems (system: import nixpkgs {
       inherit system;
       config.allowUnfreePredicate = pkg: builtins.elem (lib.getName pkg)
         [
@@ -80,26 +79,44 @@
     });
 
     nixosConfigurations = let
-      unstablePkgs = nixpkgs-unstable.legacyPackages.x86_64-linux;
-
       nixosConfig =
         nixpkgs:
         name:
         configurationPath:
         extraArgs@{
-          system ? "x86_64-linux",
+          localSystem ? "x86_64-linux", # buildPlatform
+          crossSystem ? "x86_64-linux", # hostPlatform
           specialArgs ? { },
           modules ? [ ],
           overlays ? [ ],
           enableDefaults ? true,
           ...
         }:
+        let
+          commonPkgsConfig = {
+            inherit localSystem crossSystem;
+            config.allowUnfreePredicate = pkg: builtins.elem (lib.getName pkg)
+              [
+                "nvidia-x11"
+                "nvidia-settings"
+              ];
+            overlays = (lib.optionals enableDefaults [
+              # Global overlays go here
+              inputs.roowho2.overlays.default
+            ]) ++ overlays;
+          };
+
+          pkgs = import nixpkgs commonPkgsConfig;
+          unstablePkgs = import nixpkgs-unstable commonPkgsConfig;
+        in
         lib.nixosSystem (lib.recursiveUpdate
         {
-          inherit system;
+          system = crossSystem;
+
+          inherit pkgs;
 
           specialArgs = {
-            inherit unstablePkgs inputs;
+            inherit inputs unstablePkgs;
             values = import ./values.nix;
             fp = path: ./${path};
           } // specialArgs;
@@ -113,22 +130,10 @@
             sops-nix.nixosModules.sops
             inputs.roowho2.nixosModules.default
           ]) ++ modules;
-
-          pkgs = import nixpkgs {
-            inherit system;
-            config.allowUnfreePredicate = pkg: builtins.elem (lib.getName pkg)
-              [
-                "nvidia-x11"
-                "nvidia-settings"
-              ];
-            overlays = (lib.optionals enableDefaults [
-              # Global overlays go here
-              inputs.roowho2.overlays.default
-            ]) ++ overlays;
-          };
         }
         (builtins.removeAttrs extraArgs [
-          "system"
+          "localSystem"
+          "crossSystem"
           "modules"
           "overlays"
           "specialArgs"
@@ -163,7 +168,6 @@
       bekkalokk = stableNixosConfig "bekkalokk" {
         overlays = [
           (final: prev: {
-            heimdal = unstablePkgs.heimdal;
             mediawiki-extensions = final.callPackage ./packages/mediawiki-extensions { };
             simplesamlphp = final.callPackage ./packages/simplesamlphp { };
             bluemap = final.callPackage ./packages/bluemap.nix { };
@@ -222,7 +226,7 @@
         ];
       };
       skrott = stableNixosConfig "skrott" {
-        system = "aarch64-linux";
+        crossSystem = "aarch64-linux";
         modules = [
           (nixpkgs + "/nixos/modules/installer/sd-card/sd-image-aarch64.nix")
           inputs.dibbler.nixosModules.default

hosts/gluttony/configuration.nix

@@ -11,6 +11,15 @@
   ];
 
   systemd.network.enable = lib.mkForce false;
+  boot.binfmt.emulatedSystems = [ "aarch64-linux" ];
+
+  boot.loader = {
+    systemd-boot.enable = false; # no uefi support on this device
+    grub.device = "/dev/sda";
+    grub.enable = true;
+  };
+  boot.tmp.cleanOnBoot = true;
+
   networking =
     let
       hostConf = values.hosts.gluttony;

hosts/skrott/configuration.nix

@@ -21,11 +21,17 @@
   services.logrotate.enable = lib.mkForce false;
   services.nginx.enable = lib.mkForce false;
   services.postfix.enable = lib.mkForce false;
+  services.smartd.enable = lib.mkForce false;
+  services.udisks2.enable = lib.mkForce false;
+  services.thermald.enable = lib.mkForce false;
+  services.promtail.enable = lib.mkForce false;
+  boot.supportedFilesystems.zfs = lib.mkForce false;
+  documentation.enable = lib.mkForce false;
 
   # TODO: can we reduce further?
 
   sops.secrets = {
-    "dibbler/postgresql/url" = {
+    "dibbler/postgresql/password" = {
       owner = "dibbler";
       group = "dibbler";
     };
@@ -35,6 +41,8 @@
 
   networking = {
     hostName = "skrot";
+    defaultGateway = values.hosts.gateway;
+    defaultGateway6 = values.hosts.gateway6;
     interfaces.eth0 = {
       useDHCP = false;
       ipv4.addresses = [{
@@ -56,7 +64,15 @@
 
     settings = {
       general.quit_allowed = false;
-      database.url = config.sops.secrets."dibbler/postgresql/url".path;
+      database = {
+        type = "postgresql";
+        postgresql = {
+          username = "pvv_vv";
+          dbname = "pvv_vv";
+          host = "postgres.pvv.ntnu.no";
+          password_file = config.sops.secrets."dibbler/postgresql/password".path;
+        };
+      };
     };
   };
 
@@ -73,5 +89,5 @@
 
   # Don't change (even during upgrades) unless you know what you are doing.
   # See https://search.nixos.org/options?show=system.stateVersion
-  system.stateVersion = "25.05";
+  system.stateVersion = "25.11";
 }

secrets/skrott/skrott.yaml

@@ -1,6 +1,6 @@
 dibbler:
     postgresql:
-        url: ENC[AES256_GCM,data:rHmeviBKp5b33gZ+nRweJ9YSobG4OSOxypMcyGb3/Za5DyVjydEgWBkcugrLuy1fUYIu1UV93JizCRLqOOsNkg7ON2AGhw==,iv:mWgLeAmnVaRNuKI4jIKRtW5ZPjnt2tGqjfDbZkuAIXk=,tag:iHSkFcMmTWEFlIH7lVmN1Q==,type:str]
+        password: ENC[AES256_GCM,data:2n85TO709GJc7/qoYp2RXO8Ttfo=,iv:5ZCZPEQQXPGYfDd1qPhDwDfm1Gds1M8PEX9IiCsHcrw=,tag:PAseyFBAe56pLj5Uv8Jd7A==,type:str]
 sops:
     age:
         - recipient: age1ug30gg4y7ftuya0wdv7q0vh4egn00wlv2th7mt7cgc2ze46wmvyq9lq6ge
@@ -48,8 +48,8 @@ sops:
             ZE5tMXJOYlFMOVNJU3FEZFB4TlZ1U00KHnunzKMy91oc92ptcaKCE1sfkhFGvf0S
             vRX/nyQnBGqD3X3yfvkt+aQnoLxcjoanpJVM9VeigyPu1mRg0OOxXg==
             -----END AGE ENCRYPTED FILE-----
-    lastmodified: "2026-01-11T17:28:43Z"
-    mac: ENC[AES256_GCM,data:l43vquKg33LndSXOm0hsPcalQRXjqbb30QvptXuBsmQrcEVVh20Aqp92l+rwgv60P03ZtK4SKxm/udVVoqViFTwCLYtCC5GEn4OqbD94LQKzl+XLe7yLWwv2WF8ueu170YpZ97uFxUrhOoaOaKUgnAV+4CocixG5hfadpqA3yYE=,iv:a6RRILzz4gDUuiSZPVoqjlIMu4NZG+D5Q+brusfh9PU=,tag:Y8nKbnctjka44eH15x8oCA==,type:str]
+    lastmodified: "2026-01-25T14:03:57Z"
+    mac: ENC[AES256_GCM,data:RBf3LjVNSclsPN7I4QPaDUjWbKlaccjk3rzsRNdRe3+OvJSd7MsS9RfpUFCqUtO7ZkkocXHmkHA8z8LNxs6vejT9czMsLLQD14qHZS6fFdTnToOx3Kt5UuviPO/2UryVI+6HWORkH1aqFJhzkSMop2TO5mzuOTfbCEBLYUUuS6s=,iv:NQs8O1hIbjzGBTZo+gCuisj3edraFGk/Y146HmfPmQY=,tag:4g9IXw2UFC5V9EIHuWJqdA==,type:str]
     pgp:
         - created_at: "2026-01-11T17:12:49Z"
           enc: |-

users/felixalb.nix

@@ -9,8 +9,9 @@
     ];
     shell = pkgs.zsh;
     openssh.authorizedKeys.keys = [
-      "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIDKzPICGew7uN0cmvRmbwkwTCodTBUgEhkoftQnZuO4Q felixalbrigtsen@gmail.com"
       "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIBTXSL0w7OUcz1LzEt1T3I3K5RgyNV+MYz0x/1RbpDHQ felixalb@worf"
+      "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIDKzPICGew7uN0cmvRmbwkwTCodTBUgEhkoftQnZuO4Q felixalb@pvv.ntnu.no"
+      "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIJky33ynjqyWP+hh24gFCMFIEqe3CjIIowGM9jiPbT79 felixalb@sisko.home.feal.no"
     ];
   };
 }