add dummy custom types for metallb

manage metallb ip address pool and l2advertisements in nix

nix/flake/kubenix.nix

@@ -11,6 +11,26 @@
         kubernetes = {
           namespace = "kubenix";
 
+          customTypes = {
+            # HACK: These are dummy custom types.
+            # This is needed, because the CRDs imported as a chart are not available as Nix modules
+            # There is no validation whatsoever on resources defined using these types!
+            # See: https://github.com/hall/kubenix/issues/34
+            ipaddresspool = {
+              attrName = "ipaddresspools";
+              group = "metallb.io";
+              version = "v1beta1";
+              kind = "IPAddressPool";
+            };
+
+            l2advertisement = {
+              attrName = "l2advertisements";
+              group = "metallb.io";
+              version = "v1beta1";
+              kind = "L2Advertisement";
+            };
+          };
+
           resources = {
             namespaces = {
               kubenix = { };
@@ -70,11 +90,19 @@
                 }];
               }];
             };
+
+            ipaddresspools.main = {
+              metadata.namespace = "metallb-system";
+              spec.addresses = [ "192.168.40.100-192.168.40.253" ];
+            };
+
+            l2advertisements.main.metadata.namespace = "metallb-system";
           };
 
           helm.releases.metallb = {
             chart = nixhelm.chartsDerivations.${system}.metallb.metallb;
             namespace = "metallb-system";
+            includeCRDs = true;
           };
         };
       };