fuuko: Add prometheus fritzbox exporter

machines/fuuko/services/prometheus.nix

@@ -66,6 +66,10 @@ in
           "vueko.vpn.sbruder.de:9100"
         ];
       }
+      {
+        job_name = "fritzbox";
+        static_configs = mkStaticTarget "127.0.0.1:9133";
+      }
     ];
 
     rules =
@@ -113,8 +117,19 @@ in
           };
         })
       ];
+
+    exporters = {
+      fritzbox = {
+        enable = true;
+        gatewayAddress = "192.168.100.1";
+        listenAddress = "127.0.0.1";
+      };
+    };
   };
 
+  # get rid of “could not call action: authorization required” every scrape
+  systemd.services.prometheus-fritzbox-exporter.serviceConfig.StandardOutput = "null";
+
   krops.secrets.prometheus-htpasswd = {
     group = "nginx";
   };

pkgs/default.nix

@@ -18,6 +18,10 @@ in
 
   aria2_exporter = import srcs.aria2_exporter { pkgs = self; };
 
+  # adapted nixpkgs upstream but changed to buildGoModule and updated to
+  # version that works in my setup
+  prometheus-fritzbox-exporter = super.callPackage ./prometheus-fritzbox-exporter { };
+
   # FIXME: 21.05: Move to home-manager module package attribute
   mpv-unwrapped = super.mpv-unwrapped.overrideAttrs (o: o // {
     patches = [

pkgs/prometheus-fritzbox-exporter/default.nix

@@ -0,0 +1,28 @@
+{ stdenv, buildGoModule, fetchFromGitHub, nixosTests }:
+
+buildGoModule rec {
+  pname = "fritzbox-exporter";
+  version = "unstable-2021-03-03";
+  rev = "6d66f6b8e47878c61feb710e36306fe714350658";
+
+  src = fetchFromGitHub {
+    inherit rev;
+    owner = "mxschmitt";
+    repo = "fritzbox_exporter";
+    sha256 = "0n9fwslcwgfghscrwbz7p3zamb474zk425ijkkh6cixpnc7p3vi6";
+  };
+
+  subPackages = [ "cmd/exporter" ];
+
+  vendorSha256 = "0k6bd052pjfg5c1ba1yhni8msv3wl512vfzy2hrk49jibh8h052n";
+
+  passthru.tests = { inherit (nixosTests.prometheus-exporters) fritzbox; };
+
+  meta = with stdenv.lib; {
+    description = "Prometheus Exporter for FRITZ!Box (TR64 and UPnP)";
+    homepage = "https://github.com/mxschmitt/fritzbox_exporter";
+    license = licenses.asl20;
+    maintainers = with maintainers; [ bachp flokli ];
+    platforms = platforms.unix;
+  };
+}