Refactor modules/features a bit

clusters/k2/default.nix

@@ -13,19 +13,16 @@ let
   };
 
   master = {
+    features.host = {
+      name = "k2-0";
+      address = "10.1.8.60";
+    };
     features.k8s = {
-      host.name = "k2-0";
-      host.address = "10.1.8.60";
       master.enable = true;
+      master.socat443 = true;
       nodes = nodes;
       inherit etcdCluster;
     };
-    fileSystems = {
-      "/vol/local-storage/vol1" = {
-        device = "/vol/vol1";
-        options = [ "bind" ];
-      };
-    };
     imports = [ ./cluster.nix ./hw/k2-0.nix ];
   };
 
@@ -42,7 +39,7 @@ let
     "${x.name}" =
     lib.mkMerge [
       {
-        features.k8s.host = x;
+        features.host = x;
       }
       (if builtins.hasAttr x.name etcdNodes then
         {
@@ -63,5 +60,5 @@ let
   };
 in
   builtins.foldl' (a: x: a // mkNode x) {
-    "${master.features.k8s.host.name}" = master;
+    "${master.features.host.name}" = master;
   } nodes