diff --git a/config/cluster.nix b/config/cluster.nix
index bb43be4..4c44e60 100644
--- a/config/cluster.nix
+++ b/config/cluster.nix
@@ -1,23 +1,21 @@
+{ lib, ... }:
+let
+  cephMonServers = [ "server5" "server6" "server8" ];
+in
 {
   site.net.cluster = {
     domainName = "cluster.zentralwerk.org";
-    extraRecords = [
-      {
-        data = "1 1 6789 server6";
-        name = "_ceph-mon._tcp";
-        type = "SRV";
-      }
-      {
-        data = "1 1 6789 server7";
-        name = "_ceph-mon._tcp";
-        type = "SRV";
-      }
-      {
-        data = "1 1 6789 server8";
-        name = "_ceph-mon._tcp";
-        type = "SRV";
-      }
-    ];
+    extraRecords = map (host: {
+      data = "1 1 6789 ${host}";
+      name = "_ceph-mon._tcp";
+      type = "SRV";
+    }) cephMonServers
+    ++
+    lib.lists.imap0 (i: host: {
+      name = "mon${toString i}";
+      type = "CNAME";
+      data = "${host}";
+    }) cephMonServers;
     hosts4 = {
       cls-gw = "172.20.77.1";
       server1 = "172.20.77.30";