add node-exporter to server

modules/services/grafana.nix

@@ -166,6 +166,19 @@ in
           }
         ];
       }
+      {
+        job_name = "host";
+        static_configs = [
+          {
+            targets = [
+              "192.168.0.20:9100"
+            ];
+            labels = {
+              instance = "host";
+            };
+          }
+        ];
+      }
       {
         job_name = "scheibnmeister";
         static_configs = [

modules/services/node-exporter.nix

@@ -0,0 +1,17 @@
+{
+  pkgs,
+  config,
+  lib,
+  ...
+}:
+let
+in
+{
+  services.prometheus.exporters.node = {
+    enable = true;
+    openFirewall = true;
+    firewallRules = ''
+      ip saddr 192.168.0.10 tcp dport 9100 counter accept comment node_exporter_allow_from_main_server
+    '';
+  };
+}

systems/amd-server/configuration.nix

@@ -13,6 +13,7 @@
     ./hardware-configuration.nix
     ../../modules/misc/kernel.nix
     ../../modules/services/ssh.nix
+    ../../modules/services/node-exporter.nix
   ];
 
   custom = {