prometheus: scrape node-exporter for non-critical-infra

Author: mweinelt

build/pluto/prometheus/exporters/node.nix

@@ -18,6 +18,13 @@
             labels.role = "monitoring";
             targets = [ "pluto:9100" ];
           }
+          {
+            labels.role = "services";
+            targets = [
+              "caliban.nixos.org:9100"
+              "umbriel.nixos.org:9100"
+            ];
+          }
           {
             labels.role = "mac";
             targets = [

non-critical-infra/hosts/caliban.nixos.org/default.nix

@@ -11,6 +11,7 @@
     ../../modules/element-web.nix
     ../../modules/matrix-synapse.nix
     ../../modules/owncast.nix
+    ../../modules/prometheus/node-exporter.nix
     ../../modules/vaultwarden.nix
     ./limesurvey-tmp.nix
   ];

non-critical-infra/hosts/umbriel.nixos.org/default.nix

@@ -7,6 +7,7 @@
     inputs.srvos.nixosModules.hardware-hetzner-cloud-arm
     ../../modules/common.nix
     ../../modules/mjolnir.nix
+    ../../modules/prometheus/node-exporter.nix
   ];
 
   # Bootloader.

non-critical-infra/modules/prometheus/node-exporter.nix

@@ -0,0 +1,8 @@
+{
+  networking.firewall.allowedTCPPorts = [ 9100 ];
+
+  services.prometheus.exporters.node = {
+    enable = true;
+    enabledCollectors = [ "systemd" ];
+  };
+}