1 files changed, 5 insertions, 1 deletions
diff --git a/nixos/modules/services/cluster/kubernetes/addons/dns.nix b/nixos/modules/services/cluster/kubernetes/addons/dns.nix
index 34943fddd3d..10f45db7883 100644
--- a/nixos/modules/services/cluster/kubernetes/addons/dns.nix
+++ b/nixos/modules/services/cluster/kubernetes/addons/dns.nix
@@ -1,4 +1,4 @@
-{ config, pkgs, lib, ... }:
+{ config, options, pkgs, lib, ... }:
 
 with lib;
 
@@ -23,6 +23,10 @@ in {
           take 3 (splitString "." config.services.kubernetes.apiserver.serviceClusterIpRange
         ))
       ) + ".254";
+      defaultText = literalDocBook ''
+        The <literal>x.y.z.254</literal> IP of
+        <literal>config.${options.services.kubernetes.apiserver.serviceClusterIpRange}</literal>.
+      '';
       type = types.str;
     };