fix: refactor dns server settings to toplevel

dns.nix

@@ -0,0 +1,27 @@
+{ pkgs, ... }:
+let
+  zonefile = builtins.toFile "obx.zone" (builtins.readFile ./obx.zone);
+in {
+  services.coredns = {
+    enable = true;
+    config = ''
+      . {
+          errors
+          log . {
+            class error
+          }
+          file ${zonefile} obx.
+          cache 30 {
+             disable success cluster.local
+             disable denial cluster.local
+          }
+          header {
+            response set ra
+          }
+          forward . 8.8.8.8 8.8.4.4
+          loop
+          reload
+      }
+    '';
+  };
+}

obx.zone

@@ -12,6 +12,7 @@ ns2 IN A 100.64.0.28
 $ORIGIN svc.obx.
 slurmctld IN A 127.0.0.1
 _slurmctld._tcp IN SRV 0 5 6817 slurmctld.svc.obx.
+slurmdb IN A 10.255.241.15
 
 $ORIGIN ceph.tos.obx.
 ingress IN A 10.255.241.10
@@ -37,7 +38,7 @@ otel-collector IN A 10.255.241.12
 staging-rabbitmq IN A 10.255.241.13
 rabbitmq IN A 10.255.241.14
 prod-rabbitmq IN A 10.255.241.14
-slurm IN A 10.255.241.15
+slurmdb IN A 10.255.241.15
 
 control-plane-1 IN A 10.255.241.201
 control-plane-2 IN A 10.255.241.202

relays/default.nix

@@ -1,7 +1,5 @@
 { pkgs, ... }:
-let
-  zonefile = builtins.toFile "obx.zone" (builtins.readFile ./obx.zone);
-in {
+{
     system.autoUpgrade.enable = pkgs.lib.mkForce false;
 
     networking = {
@@ -27,33 +25,6 @@ in {
       ];
     };
 
-    services.coredns = {
-      enable = true;
-      config = ''
-        . {
-            errors
-            log . {
-              class error
-            }
-            file ${zonefile} obx.
-            hosts {
-              127.0.0.1 foo foo.local
-              fallthrough
-            }
-            cache 30 {
-               disable success cluster.local
-               disable denial cluster.local
-            }
-            header {
-              response set ra
-            }
-            forward . 8.8.8.8 8.8.4.4
-            loop
-            reload
-        }
-      '';
-    };
-
     boot = {
       loader.systemd-boot.enable = true;
       loader.efi.canTouchEfiVariables = true;
@@ -151,6 +122,7 @@ in {
 
     imports = [
       ./users.nix
+      ../dns.nix
       ../modules
       ../nixos
     ];