initial testlab config

nixos/machines/nerf-nixos-testlab/configuration.nix

@@ -0,0 +1,17 @@
+flake-inputs:
+{config, pkgs, lib, ... }: {
+
+imports = [
+  ./hardware-configuration.nix
+  ../../roles
+  ../../roles/xen_guest.nix
+  ./network.nix
+];
+
+# System configuration here
+
+  boot.loader.grub.storePath = "/nix/store";
+  boot.loader.grub.copyKernels = false;
+  networking.hostName = "nerf-nixos-testlab";
+  system.stateVersion = "23.11";
+}

nixos/machines/nerf-nixos-testlab/hardware-configuration.nix

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+{config, lib, pkgs, modulesPath, ...}: {
+  imports = [ ];
+
+  fileSystems."/" = {
+    device = "root";
+    fsType = "tmpfs";
+    options = [ "size=1G" "mode=755" ];
+  };
+  fileSystems."/persistence" = {
+    device = "/dev/disk/by-uuid/30962650-f1dd-44bc-bca3-da1cdaa6fe3d";
+    fsType = "ext4";
+    neededForBoot = true;
+  };
+  fileSystems."/persist" = {
+    device = "/persistence/persist";
+    options = [ "bind" ];
+
+  };
+  fileSystems."/nix" = {
+    device = "/persistence/nix";
+    options = [ "bind" ];
+  };
+  fileSystems."/boot" = {
+    device = "/persistence/boot";
+    options = [ "bind" ];
+  };
+
+  swapDevices =
+    [{ device = "/dev/disk/by-uuid/30962650-f1dd-44bc-bca3-da1cdaa6fe3d"; }];
+
+  nix.settings.max-jobs = lib.mkDefault 4;
+
+  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
+}

nixos/machines/nerf-nixos-testlab/network.nix

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+# We sohuld put that config somewhere in roles and give it a parameter or something,
+# everyone gets the same nameserver and the same prefixLength and address vs defaultGateway alsways
+# depend on the same thing 
+{
+  imports = [ ];
+  networking = {
+    interfaces.enX0.ipv4.addresses = [ {
+      address = "192.168.0.40";
+      prefixLength = 16;
+    } ];
+    defaultGateway = "192.168.0.167";
+    nameservers = ["130.83.2.22" "130.83.56.60" "130.83.22.60" "130.82.22.63"];
+  };
+}
+