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-rw-r--r--nixos/modules/services/monitoring/prometheus/exporters.nix1
-rw-r--r--nixos/modules/services/monitoring/prometheus/exporters/tor.nix40
-rw-r--r--pkgs/servers/monitoring/prometheus/tor-exporter.nix37
-rw-r--r--pkgs/top-level/all-packages.nix1
4 files changed, 79 insertions, 0 deletions
diff --git a/nixos/modules/services/monitoring/prometheus/exporters.nix b/nixos/modules/services/monitoring/prometheus/exporters.nix
index ae8caac436da..950af848c0f6 100644
--- a/nixos/modules/services/monitoring/prometheus/exporters.nix
+++ b/nixos/modules/services/monitoring/prometheus/exporters.nix
@@ -30,6 +30,7 @@ let
     postfix   = import ./exporters/postfix.nix   { inherit config lib pkgs; };
     snmp      = import ./exporters/snmp.nix      { inherit config lib pkgs; };
     surfboard = import ./exporters/surfboard.nix { inherit config lib pkgs; };
+    tor       = import ./exporters/tor.nix       { inherit config lib pkgs; };
     unifi     = import ./exporters/unifi.nix     { inherit config lib pkgs; };
     varnish   = import ./exporters/varnish.nix   { inherit config lib pkgs; };
   };
diff --git a/nixos/modules/services/monitoring/prometheus/exporters/tor.nix b/nixos/modules/services/monitoring/prometheus/exporters/tor.nix
new file mode 100644
index 000000000000..0e2a13c44ab7
--- /dev/null
+++ b/nixos/modules/services/monitoring/prometheus/exporters/tor.nix
@@ -0,0 +1,40 @@
+{ config, lib, pkgs }:
+
+with lib;
+
+let
+  cfg = config.services.prometheus.exporters.tor;
+in
+{
+  port = 9130;
+  extraOpts = {
+    torControlAddress = mkOption {
+      type = types.str;
+      default = "127.0.0.1";
+      description = ''
+        Tor control IP address or hostname.
+      '';
+    };
+
+    torControlPort = mkOption {
+      type = types.int;
+      default = 9051;
+      description = ''
+        Tor control port.
+      '';
+    };
+  };
+  serviceOpts = {
+    serviceConfig = {
+      DynamicUser = true;
+      ExecStart = ''
+        ${pkgs.prometheus-tor-exporter}/bin/prometheus-tor-exporter \
+          -b ${cfg.listenAddress} \
+          -p ${toString cfg.port} \
+          -a ${cfg.torControlAddress} \
+          -c ${toString cfg.torControlPort} \
+          ${concatStringsSep " \\\n  " cfg.extraFlags}
+      '';
+    };
+  };
+}
diff --git a/pkgs/servers/monitoring/prometheus/tor-exporter.nix b/pkgs/servers/monitoring/prometheus/tor-exporter.nix
new file mode 100644
index 000000000000..88f469ebe179
--- /dev/null
+++ b/pkgs/servers/monitoring/prometheus/tor-exporter.nix
@@ -0,0 +1,37 @@
+{ lib, fetchFromGitHub, python3Packages }:
+
+python3Packages.buildPythonApplication rec {
+  name = "tor-exporter-${version}";
+  version = "0.3";
+
+  # Just a single .py file to use as the application's main entry point.
+  format = "other";
+
+  src = fetchFromGitHub {
+    rev = "v${version}";
+    owner = "atx";
+    repo = "prometheus-tor_exporter";
+    sha256 = "0d7pk8s8ya2pm8b4ijbfdniqcbd3vqy15dlhnmaf4wgb51pmm5yv";
+  };
+
+  propagatedBuildInputs = with python3Packages; [ prometheus_client stem retrying ];
+
+  installPhase = ''
+    mkdir -p $out/share/
+    cp prometheus-tor-exporter.py $out/share/
+  '';
+
+  fixupPhase = ''
+    makeWrapper "${python3Packages.python.interpreter}" "$out/bin/prometheus-tor-exporter" \
+          --set PYTHONPATH "$PYTHONPATH" \
+          --add-flags "$out/share/prometheus-tor-exporter.py"
+  '';
+
+  meta = with lib; {
+    description = "Prometheus exporter that exposes metrics from a Tor daemon";
+    homepage = https://github.com/atx/prometheus-tor_exporter;
+    license = licenses.mit;
+    maintainers = with maintainers; [ delroth ];
+    platforms = platforms.unix;
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 8f4bc519285f..e837d5049f84 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -13530,6 +13530,7 @@ with pkgs;
   prometheus-snmp-exporter = callPackage ../servers/monitoring/prometheus/snmp-exporter.nix {
     buildGoPackage = buildGo110Package;
   };
+  prometheus-tor-exporter = callPackage ../servers/monitoring/prometheus/tor-exporter.nix { };
   prometheus-statsd-exporter = callPackage ../servers/monitoring/prometheus/statsd-bridge.nix { };
   prometheus-surfboard-exporter = callPackage ../servers/monitoring/prometheus/surfboard-exporter.nix { };
   prometheus-unifi-exporter = callPackage ../servers/monitoring/prometheus/unifi-exporter { };