Merge pull request #113370 from chkno/prometheus-systemd-exporter-no-flags

prometheus-systemd-exporter: Init at 0.4.0

nixos/modules/services/monitoring/prometheus/exporters.nix

@@ -53,6 +53,7 @@ let
     "smokeping"
     "sql"
     "surfboard"
+    "systemd"
     "tor"
     "unifi"
     "unifi-poller"

nixos/modules/services/monitoring/prometheus/exporters/systemd.nix

@@ -0,0 +1,18 @@
+{ config, pkgs, lib, ... }:
+
+with lib;
+
+let cfg = config.services.prometheus.exporters.systemd;
+
+in {
+  port = 9558;
+
+  serviceOpts = {
+    serviceConfig = {
+      ExecStart = ''
+        ${pkgs.prometheus-systemd-exporter}/bin/systemd_exporter \
+          --web.listen-address ${cfg.listenAddress}:${toString cfg.port}
+      '';
+    };
+  };
+}

nixos/tests/prometheus-exporters.nix

@@ -835,6 +835,22 @@ let
       '';
     };
 
+    systemd = {
+      exporterConfig = {
+        enable = true;
+      };
+      metricProvider = { };
+      exporterTest = ''
+        wait_for_unit("prometheus-systemd-exporter.service")
+        wait_for_open_port(9558)
+        succeed(
+            "curl -sSf localhost:9558/metrics | grep -q '{}'".format(
+                'systemd_unit_state{name="basic.target",state="active",type="target"} 1'
+            )
+        )
+      '';
+    };
+
     tor = {
       exporterConfig = {
         enable = true;

pkgs/servers/monitoring/prometheus/systemd-exporter.nix

@@ -0,0 +1,25 @@
+{ lib, buildGoModule, fetchFromGitHub, nixosTests }:
+
+buildGoModule rec {
+  pname = "systemd_exporter";
+  version = "0.4.0";
+
+  vendorSha256 = "sha256-bYoB0r+d0j3esi/kK2a7/Duup9cf4M3WJjiBNs2+bj8=";
+
+  src = fetchFromGitHub {
+    owner = "povilasv";
+    repo = pname;
+    rev = "v${version}";
+    sha256 = "sha256-JDfRHczFnTP9sxA7polUE9qzJhSPIiAU58GBNDYkX4c=";
+  };
+
+  passthru.tests = { inherit (nixosTests.prometheus-exporters) systemd; };
+
+  meta = with lib; {
+    description = "Exporter for systemd unit metrics";
+    homepage = "https://github.com/povilasv/systemd_exporter";
+    license = licenses.asl20;
+    maintainers = with maintainers; [ chkno ];
+    platforms = platforms.unix;
+  };
+}

pkgs/top-level/all-packages.nix

@@ -18619,6 +18619,7 @@ in
   prometheus-smokeping-prober = callPackage ../servers/monitoring/prometheus/smokeping-prober.nix { };
   prometheus-snmp-exporter = callPackage ../servers/monitoring/prometheus/snmp-exporter.nix { };
   prometheus-sql-exporter = callPackage ../servers/monitoring/prometheus/sql-exporter.nix { };
+  prometheus-systemd-exporter = callPackage ../servers/monitoring/prometheus/systemd-exporter.nix { };
   prometheus-tor-exporter = callPackage ../servers/monitoring/prometheus/tor-exporter.nix { };
   prometheus-statsd-exporter = callPackage ../servers/monitoring/prometheus/statsd-exporter.nix { };
   prometheus-surfboard-exporter = callPackage ../servers/monitoring/prometheus/surfboard-exporter.nix { };