xen builder & rke2 changes

flake.nix

@@ -12,7 +12,7 @@
 
   outputs = { self, nixpkgs, disko, nixos-generators }:
     let
-      mkSystem = { systemConfig, moduleConfig }: nixpkgs.lib.nixosSystem {
+      mkSystem = { systemConfig ? { }, moduleConfig }: nixpkgs.lib.nixosSystem {
         system = "x86_64-linux";
         modules = [
           disko.nixosModules.disko
@@ -44,81 +44,12 @@
           };
         };
 
-        # RKE2 Primary Server
+        # Nix Builder
-        lin-va-kube1 = mkSystem {
+        lin-va-nix-builder = mkSystem {
-          systemConfig = ./hosts/rke2.nix;
           moduleConfig = {
-            hostName = "lin-va-kube1";
+            hostName = "lin-va-nix-builder";
             mainDiskID = "/dev/xvda";
-
+            enableXenGuest = true;
-            democraticConfig = {
-              apiKeyFile = ./_scratch/truenas-api;
-              sshKeyFile = ./_scratch/truenas-ssh;
-            };
-
-            networkConfig = {
-              interface = "enX0";
-              address = "10.0.50.50";
-              defaultGateway = "10.0.50.254";
-              nameservers = [ "10.0.50.254" ];
-            };
-          };
-        };
-
-        # RKE2 Primary Server
-        lin-va-rke1 = mkSystem {
-          systemConfig = ./hosts/rke2.nix;
-          moduleConfig = {
-            hostName = "lin-va-rke1";
-            mainDiskID = "/dev/xvda";
-
-            democraticConfig = {
-              apiKeyFile = ./_scratch/truenas-api;
-              sshKeyFile = ./_scratch/truenas-ssh;
-            };
-
-            networkConfig = {
-              interface = "enX0";
-              address = "10.0.20.201";
-              defaultGateway = "10.0.20.254";
-              nameservers = [ "10.0.20.254" ];
-            };
-          };
-        };
-
-        # RKE2 Second Server
-        lin-va-rke2 = mkSystem {
-          systemConfig = ./hosts/rke2.nix;
-          moduleConfig = {
-            hostName = "lin-va-rke2";
-            mainDiskID = "/dev/disk/by-id/ata-VBOX_HARDDISK_VBf55aaccc-688cfd0d";
-            dataDiskID = "/dev/disk/by-id/ata-VBOX_HARDDISK_VBfd391256-6e368424";
-            serverAddr = "https://10.0.20.201:9345";
-
-            networkConfig = {
-              interface = "enp0s3";
-              address = "10.0.20.202";
-              defaultGateway = "10.0.20.254";
-              nameservers = [ "10.0.20.254" ];
-            };
-          };
-        };
-
-        # RKE2 Third Server
-        lin-va-rke3 = mkSystem {
-          systemConfig = ./hosts/rke2.nix;
-          moduleConfig = {
-            hostName = "lin-va-rke3";
-            mainDiskID = "/dev/disk/by-id/ata-VBOX_HARDDISK_VBe9edacd5-ac4ed4fa";
-            dataDiskID = "/dev/disk/by-id/ata-VBOX_HARDDISK_VBa1fc46d0-19380495";
-            serverAddr = "https://10.0.20.201:9345";
-
-            networkConfig = {
-              interface = "enp0s3";
-              address = "10.0.20.203";
-              defaultGateway = "10.0.20.254";
-              nameservers = [ "10.0.20.254" ];
-            };
           };
         };
       };

hosts/rke2-image.nix

@@ -31,10 +31,8 @@
         "xen_blkfront"
         "xenfs"
 
-        # iSCSI & Multipath
+        # iSCSI
         "iscsi_tcp"
-        "dm_multipath"
-        "dm_round_robin"
       ];
     };
 
@@ -64,6 +62,11 @@
           # 51820 # Canal CNI with WireGuard IPv4 (if using encryption)
           # 51821 # Canal CNI with WireGuard IPv6 (if using encryption)
         ];
+
+        # Allow Multicast
+        extraCommands = ''
+          iptables -A INPUT -m pkttype --pkt-type multicast -j ACCEPT
+        '';
       };
     };
 
@@ -77,18 +80,6 @@
         name = "iqn.2025.placeholder:initiator"; # Overridden @ Runtime
       };
 
-      # Enable Multipath
-      multipath = {
-        enable = true;
-        defaults = ''
-          defaults {
-              user_friendly_names yes
-              find_multipaths yes
-          }
-        '';
-        pathGroups = [ ];
-      };
-
       # Cloud Init
       cloud-init = {
         enable = true;

lib/common-system.nix

@@ -6,9 +6,15 @@
       type = lib.types.str;
       description = "The node hostname";
     };
+    enableXenGuest = lib.mkOption {
+      type = lib.types.bool;
+      default = false;
+      description = "Whether to enable Xen guest support";
+    };
   };
 
-  config = {
+  config = lib.mkMerge [
+    {
       # Basic System
       system.stateVersion = "24.11";
       nix.settings.experimental-features = [ "nix-command" "flakes" ];
@@ -39,5 +45,18 @@
         ];
         hashedPassword = null;
       };
-  };
+    }
+
+    (lib.mkIf config.enableXenGuest {
+      services.xe-guest-utilities.enable = true;
+
+      boot.initrd = {
+        availableKernelModules = [ "xen_blkfront" "xen_netfront" ];
+        kernelModules = [ "xen_netfront" "xen_blkfront" ];
+        supportedFilesystems = [ "ext4" "xenfs" ];
+      };
+
+      boot.kernelModules = [ "xen_netfront" "xen_blkfront" "xenfs" ];
+    })
+  ];
 }