diff --git a/flake.nix b/flake.nix
index 3346f51..606af6a 100644
--- a/flake.nix
+++ b/flake.nix
@@ -15,9 +15,15 @@
     helper = (import ./lib/flake-helper.nix) inputs;
   in {
     clerie.hosts = {
-      aluminium = { name = "aluminium"; };
+      aluminium = {
+        name = "aluminium";
+        group = "event";
+      };
       backup-4 = { name = "backup-4"; };
-      beryllium = { name = "beryllium"; };
+      beryllium = {
+        name = "beryllium";
+        group = "event";
+      };
       carbon = { name = "carbon"; };
       clerie-backup = { name = "clerie-backup"; };
       dn42-il-gw1 = { name = "dn42-il-gw1"; };
@@ -37,7 +43,10 @@
       storage-2 = { name = "storage-2"; };
       web-2 = { name = "web-2"; };
       dn42-ildix-service = { name = "dn42-ildix-service"; };
-      astatine = { name = "astatine"; };
+      astatine = {
+        name = "astatine";
+        group = "event";
+      };
       _iso = { name = "_iso"; };
     };
 
diff --git a/lib/flake-helper.nix b/lib/flake-helper.nix
index 7392887..ae08c4c 100644
--- a/lib/flake-helper.nix
+++ b/lib/flake-helper.nix
@@ -4,6 +4,7 @@ rec {
   generateNixosSystem = {
     name,
     system ? "x86_64-linux",
+    group ? null,
   }: let
     localNixpkgs = nixpkgs.lib.attrByPath [ "nixpkgs-${name}" ] nixpkgs inputs;
   in localNixpkgs.lib.nixosSystem {
@@ -25,6 +26,7 @@ rec {
               nixos-exporter;
            })
         ];
+        clerie.monitoring = nixpkgs.lib.attrsets.optionalAttrs (group != null) { serviceLevel = group; };
       })
       solid-xmpp-alarm.nixosModules.solid-xmpp-alarm
       (../hosts + "/${name}/configuration.nix")
@@ -37,6 +39,9 @@ rec {
     deployment = {
       targetHost = "${name}.net.clerie.de";
       targetUser = null;
+      tags = let
+        group = nixpkgs.lib.attrByPath [ "clerie" "monitoring" "serviceLevel" ] null hostSystem.config;
+      in nixpkgs.lib.lists.optional (group != null) group;
     };
     nixpkgs.system = hostSystem.config.nixpkgs.system;
     imports = hostSystem._module.args.modules;