added local DNS

hosts/node0/default.nix

@@ -16,6 +16,7 @@
           address = serverIp;
           prefixLength = 24;
           defaultGateway = "192.168.1.1";
+          dns = ["192.168.1.250" "1.1.1.1"];
         };
       };
     };

hosts/node1/default.nix

@@ -17,6 +17,7 @@
           address = serverIp;
           prefixLength = 24;
           defaultGateway = "192.168.1.1";
+          dns = ["192.168.1.250" "1.1.1.1"];
         };
       };
     };

hosts/node2/default.nix

@@ -17,6 +17,7 @@
           address = serverIp;
           prefixLength = 24;
           defaultGateway = "192.168.1.1";
+          dns = ["192.168.1.250" "1.1.1.1"];
         };
       };
     };

nixosModules/networking/default.nix

@@ -25,6 +25,11 @@ let
       default = null;
       example = if version == 4 then "192.168.1.1" else null;
     };
+    dns = lib.mkOption {
+      type = lib.types.listOf lib.types.str;
+      description = "The DNS servers to use";
+      default = [ "8.8.8.8" "1.1.1.1" ];
+    };
   };
 in
 {
@@ -103,13 +108,7 @@ in
         cfg.ipv4.address == null || cfg.ipv4.prefixLength == null || cfg.ipv4.defaultGateway == null
       );
       defaultGateway = lib.mkIf (cfg.ipv4.defaultGateway != null) { address = cfg.ipv4.defaultGateway; };
-      nameservers =
+      nameservers = cfg.ipv4.dns;
-        lib.mkIf
-          (cfg.ipv4.address != null || cfg.ipv4.prefixLength != null || cfg.ipv4.defaultGateway != null)
-          [
-            "8.8.8.8"
-            "1.1.1.1"
-          ];
     };
   };
 }