flake.nix

@@ -84,8 +84,8 @@
         nodes = mkDeployNodes (name: machine: {
           hostname = self.nixosConfigurations.${name}.config.networking.fqdn;
           profiles.system = {
-            remoteBuild = true;
+            remoteBuild = machine.arch != "x86_64-linux";
-            path = deploy-rs.lib."aarch64-linux".activate.nixos
+            path = deploy-rs.lib."${machine.arch}".activate.nixos
               self.nixosConfigurations.${name};
           };
         });

nixos/machines/default.nix

@@ -1,7 +1,12 @@
+# TODO: Create a nixos module system for this. (mkMerge)
+# That way, we don't have to specify isRaspberryPi on every machine... etc.
 {
   warwick = {
     type = "physical";
     arch = "aarch64-linux";
+    isRaspberryPi = true;
+    isHypervisor = false;
+    isVirtualMachine = false;
 
     nixosModule.lab = {
       storage = {
@@ -13,6 +18,9 @@
   atlas = {
     type = "physical";
     arch = "x86_64-linux";
+    isRaspberryPi = false;
+    isHypervisor = true;
+    isVirtualMachine = false;
 
     nixosModule.lab = {
       storage = {
@@ -31,9 +39,11 @@
   jefke = {
     type = "physical";
     arch = "x86_64-linux";
+    isRaspberryPi = false;
+    isHypervisor = true;
+    isVirtualMachine = false;
 
-    nixosModule = {
+    nixosModule.lab = {
-      lab = {
       storage = {
         osDisk = "/dev/sda";
         dataPartition = "/dev/nvme0n1p1";
@@ -46,11 +56,13 @@
       };
     };
   };
-  };
 
   lewis = {
     type = "physical";
     arch = "x86_64-linux";
+    isRaspberryPi = false;
+    isHypervisor = true;
+    isVirtualMachine = false;
 
     nixosModule.lab = {
       backups.enable = true;
@@ -73,18 +85,23 @@
   hermes = {
     type = "virtual";
     hypervisorName = "lewis";
+    isRaspberryPi = false;
+    isVirtualMachine = true;
+    isHypervisor = false;
 
     nixosModule = { config, ... }: {
       lab = {
-        networking.dmz.services.enable = true;
+        networking = {
+          dmz.services.enable = true;
+          staticNetworking = true;
+          staticIPv4 = config.lab.networking.dmz.ipv4.services;
+          staticIPv6 = config.lab.networking.dmz.ipv6.services;
+        };
 
         vm = {
           # TODO: would be cool to create a check that a mac address is only ever assigned to one VM.
           # TODO: idea: what if we generated these IDs by hashing the host name and reducing that to the amount of hosts possible?
           id = 7;
-          staticNetworking = true;
-          staticIPv4 = config.lab.networking.dmz.ipv4.services;
-          staticIPv6 = config.lab.networking.dmz.ipv6.services;
 
           shares = [{
             name = "dnsmasq";
@@ -98,6 +115,9 @@
   maestro = {
     type = "virtual";
     hypervisorName = "atlas";
+    isRaspberryPi = false;
+    isVirtualMachine = false;
+    isHypervisor = false;
 
     nixosModule = { config, ... }: {
       microvm.balloonMem = 7680;
@@ -115,6 +135,9 @@
   bancomart = {
     type = "virtual";
     hypervisorName = "jefke";
+    isRaspberryPi = false;
+    isVirtualMachine = false;
+    isHypervisor = false;
 
     nixosModule = {
       microvm.balloonMem = 7680;
@@ -129,6 +152,9 @@
   vpay = {
     type = "virtual";
     hypervisorName = "lewis";
+    isRaspberryPi = false;
+    isVirtualMachine = false;
+    isHypervisor = false;
 
     nixosModule = {
       microvm.balloonMem = 5120;

nixos/modules/networking/default.nix

@@ -22,11 +22,26 @@ in {
       };
     };
 
-    mainNicNamePattern = lib.mkOption {
+    staticNetworking = lib.mkOption {
-      default = "en*";
+      default = false;
+      type = lib.types.bool;
+      description = ''
+        Whether this machine has static networking configuration applied.
+        Routing is prepopulated, but IP addresses have to be set.
+      '';
+    };
+
+    staticIPv4 = lib.mkOption {
       type = lib.types.str;
       description = ''
-        Pattern to match the name of this machine's main NIC.
+        Static IPv4 address for the machine.
+      '';
+    };
+
+    staticIPv6 = lib.mkOption {
+      type = lib.types.str;
+      description = ''
+        Static IPv6 address for the machine.
       '';
     };
   };
@@ -35,7 +50,7 @@ in {
     networking = {
       domain = if machine.type == "physical" then "hyp" else "dmz";
       nftables.enable = true;
-      useDHCP = true;
+      useDHCP = false;
 
       firewall = {
         enable = true;
@@ -43,10 +58,10 @@ in {
       };
     };
 
-    systemd.network = lib.mkIf (false && machine.type == "physical") {
+    systemd.network = {
       enable = true;
 
-      netdevs = {
+      netdevs = lib.mkIf machine.isHypervisor {
         "20-vlandmz" = {
           vlanConfig.Id = 30;
 
@@ -64,9 +79,10 @@ in {
         };
       };
 
-      networks = {
+      networks = lib.attrsets.mergeAttrsList [
+        (lib.optionalAttrs machine.isHypervisor {
           "30-main-nic" = {
-          matchConfig.Name = cfg.mainNicNamePattern;
+            matchConfig.Name = "en*";
             vlan = [ "vlandmz" ];
 
             networkConfig = {
@@ -100,7 +116,52 @@ in {
             matchConfig.Name = "vm-*";
             networkConfig.Bridge = cfg.dmz.bridgeName;
           };
+        })
+        (lib.optionalAttrs machine.isVirtualMachine {
+          "30-main-nic" = {
+            matchConfig.Name = "en*";
+
+            networkConfig = {
+              IPv6AcceptRA = ! cfg.staticNetworking;
+              DHCP = lib.mkIf (! cfg.staticNetworking) "yes";
+
+              Address = lib.mkIf cfg.staticNetworking [
+                "${cfg.staticIPv4}/${cfg.dmz.ipv4.prefixLength}"
+                "${cfg.staticIPv6}/${cfg.dmz.ipv6.prefixLength}"
+              ];
+
+              DNS = lib.mkIf cfg.staticNetworking [
+                cfg.dmz.ipv4.router
+                cfg.dmz.ipv6.router
+              ];
             };
+
+            routes = lib.mkIf cfg.staticNetworking [
+              {
+                routeConfig = {
+                  Gateway = cfg.dmz.ipv4.router;
+                  Destination = "0.0.0.0/0";
+                };
+              }
+              {
+                routeConfig = {
+                  Gateway = cfg.dmz.ipv6.router;
+                  Destination = "::/0";
+                };
+              }
+            ];
+          };
+        })
+        (lib.optionalAttrs machine.isRaspberryPi {
+          "30-main-nic" = {
+            matchConfig.Name = "end*";
+            networkConfig = {
+              IPv6AcceptRA = true;
+              DHCP = "yes";
+            };
+          };
+        })
+      ];
     };
   };
 }

nixos/modules/storage.nix

@@ -26,13 +26,23 @@ in {
     };
   };
 
-  config = lib.mkIf (false && machine.type == "physical") {
+  config = {
-    fileSystems.${cfg.dataMountPoint} = lib.mkIf (! isNull cfg.dataPartition) {
+    fileSystems = lib.attrsets.mergeAttrsList [
-      device = cfg.dataPartition;
+      (lib.optionalAttrs machine.isHypervisor {
+        "${cfg.dataMountPoint}".device = cfg.dataPartition;
+      })
+      (lib.optionalAttrs machine.isRaspberryPi {
+        "/" = {
+          device = "/dev/disk/by-label/NIXOS_SD";
+          fsType = "ext4";
+          options = [ "noatime" ];
         };
+      })
+    ];
 
     # TODO: Rename this to 'osDisk'. Unfortunately, we would need to run nixos-anywhere again then.
-    disko.devices.disk.vdb = {
+    disko = lib.mkIf machine.isHypervisor {
+      devices.disk.vdb = {
         device = cfg.osDisk;
         type = "disk";
 
@@ -66,4 +76,5 @@ in {
         };
       };
     };
+  };
 }

nixos/physical.nix

@@ -1,55 +1,40 @@
-{ pkgs, config, lib, modulesPath, microvm, disko, agenix, machines, dns, machine, nixos-hardware, ... }: {
+{ pkgs, config, lib, microvm, disko, agenix, machine, machines, dns, nixos-hardware, ... }: {
   imports = [
-    (modulesPath + "/installer/scan/not-detected.nix")
     microvm.nixosModules.host
-    nixos-hardware.nixosModules.raspberry-pi-4
+  ]
-  ];
+  ++ lib.lists.optional (machine.isRaspberryPi) nixos-hardware.nixosModules.raspberry-pi-4;
 
   config = {
+    boot = lib.mkIf (machine.isHypervisor) {
+      kernelModules = [ "kvm-intel" ];
+      extraModulePackages = [ ];
 
-    fileSystems = {
+      initrd = {
-      "/" = {
+        availableKernelModules = [
-        device = "/dev/disk/by-label/NIXOS_SD";
+          "ahci"
-        fsType = "ext4";
+          "xhci_pci"
-        options = [ "noatime" ];
+          "nvme"
-      };
+          "usbhid"
+          "usb_storage"
+          "sd_mod"
+          "sdhci_pci"
+        ];
+        kernelModules = [ ];
       };
 
-    # boot.loader.grub.device = "/dev/sda";
+      loader = {
-    # boot.loader.grub.enable = true;
+        systemd-boot.enable = true;
-    # boot.loader.grub.efiSupport = true;
+        efi.canTouchEfiVariables = true;
-    # boot.loader.grub.efiInstallAsRemovable = true;
+      };
-    # boot.loader.grub.device = "nodev";
+    };
-    # boot = {
-    #   # kernelModules = [ "kvm-intel" ];
-    #   kernelModules = [ ];
-    #   extraModulePackages = [ ];
-
-    #   initrd = {
-    #     availableKernelModules = [
-    #       "ahci"
-    #       "xhci_pci"
-    #       "nvme"
-    #       "usbhid"
-    #       "usb_storage"
-    #       "sd_mod"
-    #       "sdhci_pci"
-    #     ];
-    #     kernelModules = [ ];
-    #   };
-
-    #   loader = {
-    #     # systemd-boot.enable = true;
-    #     efi.canTouchEfiVariables = true;
-    #   };
-    # };
 
     nixpkgs = {
       config.allowUnfree = true;
+      # TODO: do we need this?
       # hostPlatform = machine.arch;
     };
 
-    # hardware.cpu.intel.updateMicrocode = config.hardware.enableRedistributableFirmware;
+    hardware.cpu.intel.updateMicrocode = lib.mkIf (machine.isHypervisor) config.hardware.enableRedistributableFirmware;
 
     age.identityPaths = [ "/etc/age_ed25519" ];
 

nixos/virtual/default.nix

@@ -2,6 +2,7 @@
   imports = [ ./docker_swarm.nix ];
 
   options.lab.vm = {
+    # TODO: make global.
     baseMACAddress = lib.mkOption {
       default = "BA:DB:EE:F0:00:00";
       type = lib.types.str;
@@ -17,29 +18,6 @@
       '';
     };
 
-    staticNetworking = lib.mkOption {
-      default = false;
-      type = lib.types.bool;
-      description = ''
-        Whether this VM has static networking configuration applied.
-        Routing is prepopulated, but IP addresses have to be set.
-      '';
-    };
-
-    staticIPv4 = lib.mkOption {
-      type = lib.types.str;
-      description = ''
-        Static IPv4 address for the VM.
-      '';
-    };
-
-    staticIPv6 = lib.mkOption {
-      type = lib.types.str;
-      description = ''
-        Static IPv6 address for the VM.
-      '';
-    };
-
     shares = lib.mkOption {
       default = [ ];
       description = ''
@@ -73,15 +51,19 @@
       mountPoint = "/etc/ssh/host_keys";
     }];
 
-    services.openssh = {
+    services.openssh =
-      # hostKeys = [{
+      let
-      #   path = "/etc/ssh/host_keys/ssh_host_ed25519_key";
+        hostKeyPath = "/etc/ssh/host_keys/ssh_host_ed25519_key";
-      #   type = "ed25519";
+      in
-      # }];
+      {
+        hostKeys = [{
+          path = hostKeyPath;
+          type = "ed25519";
+        }];
 
-      # extraConfig = ''
+        extraConfig = ''
-      #   HostKey /etc/ssh/host_keys/ssh_host_ed25519_key
+          HostKey ${hostKeyPath}
-      # '';
+        '';
       };
 
     microvm = {
@@ -108,51 +90,5 @@
         mac = pkgs.lib.net.mac.add config.lab.vm.id config.lab.vm.baseMACAddress;
       }];
     };
-
-    networking.useDHCP = false;
-
-    systemd.network =
-      let
-        cfg = config.lab.networking;
-      in
-      {
-        enable = true;
-
-        networks = {
-          "30-main-nic" = {
-            matchConfig.Name = "en*";
-
-            networkConfig = {
-              IPv6AcceptRA = ! config.lab.vm.staticNetworking;
-              DHCP = lib.mkIf (! config.lab.vm.staticNetworking) "yes";
-
-              Address = lib.mkIf config.lab.vm.staticNetworking [
-                "${ config.lab.vm.staticIPv4}/${cfg.dmz.ipv4.prefixLength}"
-                "${config.lab.vm.staticIPv6}/${cfg.dmz.ipv6.prefixLength}"
-              ];
-
-              DNS = lib.mkIf config.lab.vm.staticNetworking [
-                cfg.dmz.ipv4.router
-                cfg.dmz.ipv6.router
-              ];
-            };
-
-            routes = lib.mkIf config.lab.vm.staticNetworking [
-              {
-                routeConfig = {
-                  Gateway = cfg.dmz.ipv4.router;
-                  Destination = "0.0.0.0/0";
-                };
-              }
-              {
-                routeConfig = {
-                  Gateway = cfg.dmz.ipv6.router;
-                  Destination = "::/0";
-                };
-              }
-            ];
-          };
-        };
-      };
   };
 }