prometheus: basic metric export

flake.nix

@@ -277,6 +277,7 @@
             self.nixosModules.globalinstalls
             self.nixosModules.lix-is-nix
             self.nixosModules.openssh
+            self.nixosModules.prometheus-node
             self.nixosModules.systemd-boot
             self.nixosModules.tailscale
             zerforschen-plus.nixosModules.default

nixosModules/prometheus-node.nix

@@ -0,0 +1,20 @@
+{
+  services.prometheus.exporters = {
+    node = {
+      enable = true;
+      openFirewall = true;
+      port = 9190;
+      enabledCollectors = [
+        # keep-sorted start
+        "cgroups"
+        "interrupts"
+        "softirqs"
+        "swap"
+        "systemd"
+        "tcpstat"
+        "wifi"
+        # keep-sorted end
+      ];
+    };
+  };
+}