modules/cluster/deployment: let microvms specify their nets by providing just a default

modules/cluster/deployment-options.nix

@@ -1,4 +1,4 @@
-{ lib, ... }:
+{ zentralwerk, lib, ... }:
 # our custom options
 {
   options.deployment = with lib; {
@@ -12,7 +12,14 @@
     };
     networks = mkOption {
       type = with types; listOf str;
-      default = [ "serv" ];
+      default = builtins.attrNames (
+        lib.filterAttrs (net: { hosts4, hosts6, ... }:
+          hosts4 ? ${hostName} ||
+          lib.filterAttrs (ctx: hosts6:
+            hosts6 ? ${hostName}
+          ) hosts6 != {}
+        ) zentralwerk.lib.config.site.net
+      );
     };
     persistedShares = mkOption {
       type = with types; listOf str;

modules/cluster/deployment.nix

@@ -8,17 +8,9 @@ let
     flpk = "flpk-gw";
   };
 
-  nets = builtins.attrNames (
-    lib.filterAttrs (net: { hosts4, hosts6, ... }:
-      hosts4 ? ${hostName} ||
-      lib.filterAttrs (ctx: hosts6:
-        hosts6 ? ${hostName}
-      ) hosts6 != {}
-    ) zentralwerk.lib.config.site.net
-  );
-
   inherit (config.networking) hostName;
   inherit (config.system.build.skyflake-deployment) user repo vmName;
+  inherit (config.deployment) networks;
 
   generateMacAddress = net:
     let
@@ -37,8 +29,6 @@ let
 
 in
 {
-  deployment.networks = nets;
-
   microvm = {
     hypervisor = "cloud-hypervisor";
     vcpu = config.deployment.vcpu;
@@ -104,7 +94,7 @@ in
         # rename interface to net name
         linkConfig.Name = net;
       };
-    }) {} nets;
+    }) {} networks;
 
     networks = builtins.foldl' (networks: net: networks // {
       "30-${net}" =
@@ -135,6 +125,6 @@ builtins.filter (hosts6: hosts6 ? ${hostName}) (
               )
           );
         };
-    }) {} nets;
+    }) {} networks;
   };
 }