feat: new k3s cluster

hosts/k8s/lib.nix

@@ -0,0 +1,43 @@
+{
+  genCoreModule = {
+    hostName,
+    vars_networking,
+  }: let
+    hostAddress = vars_networking.hostAddress.${hostName};
+  in {
+    # supported file systems, so we can mount any removable disks with these filesystems
+    boot.supportedFilesystems = [
+      "ext4"
+      "btrfs"
+      "xfs"
+      #"zfs"
+      "ntfs"
+      "fat"
+      "vfat"
+      "exfat"
+      "cifs" # mount windows share
+    ];
+
+    boot.kernelModules = ["kvm-amd"];
+    boot.extraModprobeConfig = "options kvm_amd nested=1"; # for amd cpu
+
+    networking = {
+      inherit hostName;
+      inherit (vars_networking) defaultGateway nameservers;
+
+      networkmanager.enable = false;
+      interfaces.ens18 = {
+        useDHCP = false;
+        ipv4.addresses = [hostAddress];
+      };
+    };
+
+    # This value determines the NixOS release from which the default
+    # settings for stateful data, like file locations and database versions
+    # on your system were taken. It‘s perfectly fine and recommended to leave
+    # this value at the release version of the first install of this system.
+    # Before changing this value read the documentation for this option
+    # (e.g. man configuration.nix or on https://nixos.org/nixos/options.html).
+    system.stateVersion = "23.11"; # Did you read the comment?
+  };
+}