cluster/services/dns: add nameserver records

cluster/services/dns/default.nix

@@ -8,6 +8,7 @@ in
   imports = [
     ./options.nix
     ./nodes.nix
+    ./ns-records.nix
   ];
 
   links = {

cluster/services/dns/ns-records.nix

@@ -0,0 +1,26 @@
+{ config, depot, lib, ... }:
+
+let
+  cfg = config.services.dns;
+
+  nsNodes = lib.imap1 (idx: node: {
+    name = "eu${toString idx}.ns";
+    value = {
+      type = "A";
+      target = [ depot.hours.${node}.interfaces.primary.addrPublic ];
+    };
+  }) cfg.nodes.authoritative;
+in
+
+{
+  dns.records = lib.mkMerge [
+    (lib.listToAttrs nsNodes)
+    {
+      NS = {
+        name = "@";
+        type = "NS";
+        target = map (ns: "${ns.name}.${depot.lib.meta.domain}.") nsNodes;
+      };
+    }
+  ];
+}