From 40d78422cf8ffe55b8327a986d881a8d6011d12d Mon Sep 17 00:00:00 2001
From: Katharina Heidenreich <katharina.heidenreich@stud.tu-darmstadt.de>
Date: Sat, 11 Apr 2026 12:53:19 +0200
Subject: [PATCH] feat: add prometheus exporter

---
 config/services.nix        |  8 ++++++++
 services/node-exporter.nix | 12 ++++++++++++
 2 files changed, 20 insertions(+)
 create mode 100644 services/node-exporter.nix

diff --git a/config/services.nix b/config/services.nix
index c0ab036..fe3e0c1 100644
--- a/config/services.nix
+++ b/config/services.nix
@@ -39,4 +39,12 @@ rec {
     port = 8081;
   };
 
+  "metric-exporter" = {
+    port = 9100;
+    collectors = [
+      "systemd"
+      "processes"
+      "thermal_zone"
+    ];
+  };
 }
diff --git a/services/node-exporter.nix b/services/node-exporter.nix
new file mode 100644
index 0000000..c313e8e
--- /dev/null
+++ b/services/node-exporter.nix
@@ -0,0 +1,12 @@
+{ config, pkgs, lib, ... }:
+let
+  serv = import ../config/services.nix;
+in {
+  services.prometheus.exporters.node = {
+    enable = true;
+    port = serv."metric-exporter".port;
+    enabledCollectors = serv."metric-exporter".collectors;
+  };
+
+  networking.firewall.allowedTCPPorts = [ serv."metric-exporter".port ];
+}