move node_exporter to its own module

hosts/hel1-a/configuration.nix

@@ -67,9 +67,7 @@
     };
 
     services = {
-      friendlyport.vpn.ports = [
+      node_exporter.enable = true;
-        myData.ports.exporters.node
-      ];
 
       deployerbot = {
         follower = {
@@ -122,12 +120,6 @@
   services = {
     tailscale.enable = true;
 
-    prometheus.exporters.node = {
-      enable = true;
-      enabledCollectors = ["systemd" "processes"];
-      port = myData.ports.exporters.node;
-    };
-
     nsd = {
       enable = true;
       interfaces = ["0.0.0.0" "::"];

hosts/vno1-oh2/configuration.nix

@@ -70,9 +70,10 @@
         443
         myData.ports.grafana
         myData.ports.prometheus
-        myData.ports.exporters.node
       ];
 
+      node_exporter.enable = true;
+
       nsd-acme = {
         enable = true;
         zones."grafana.jakstys.lt" = {
@@ -181,13 +182,6 @@
     prometheus = {
       enable = true;
       port = myData.ports.prometheus;
-      exporters = {
-        node = {
-          enable = true;
-          enabledCollectors = ["systemd" "processes"];
-          port = myData.ports.exporters.node;
-        };
-      };
 
       globalConfig = {
         scrape_interval = "15s";

hosts/vno1-rp3b/configuration.nix

@@ -48,6 +48,8 @@
     };
 
     services = {
+      node_exporter.enable = true;
+
       postfix = {
         enable = true;
         saslPasswdPath = config.age.secrets.sasl-passwd.path;
@@ -60,18 +62,9 @@
           publicKey = myData.hosts."vno1-oh2.servers.jakst".publicKey;
         };
       };
-
-      friendlyport.vpn.ports = [
-        myData.ports.exporters.node
-      ];
     };
   };
 
-  services.prometheus.exporters.node = {
-    enable = true;
-    enabledCollectors = ["systemd" "processes"];
-    port = myData.ports.exporters.node;
-  };
   services.tailscale.enable = true;
 
   services.pipewire = {

modules/services/default.nix

@@ -7,6 +7,7 @@
   imports = [
     ./deployerbot
     ./friendlyport
+    ./node_exporter
     ./nsd-acme
     ./postfix
     ./syncthing

modules/services/node_exporter/default.nix

@@ -0,0 +1,22 @@
+{
+  config,
+  lib,
+  myData,
+  ...
+}: {
+  options.mj.services.node_exporter = with lib.types; {
+    enable = lib.mkEnableOption "Enable node_exporter";
+  };
+
+  config = lib.mkIf config.mj.services.node_exporter.enable {
+    services.prometheus.exporters.node = {
+      enable = true;
+      enabledCollectors = ["systemd" "processes"];
+      port = myData.ports.exporters.node;
+    };
+
+    mj.services.friendlyport.vpn.ports = [
+      myData.ports.exporters.node
+    ];
+  };
+}