nixos/prometheus-kea-exporter: init

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

@@ -34,6 +34,7 @@ let
     "fritzbox"
     "json"
     "jitsi"
+    "kea"
     "keylight"
     "knot"
     "lnd"

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

@@ -0,0 +1,38 @@
+{ config
+, lib
+, pkgs
+, options
+}:
+
+with lib;
+
+let
+  cfg = config.services.prometheus.exporters.kea;
+in {
+  port = 9547;
+  extraOpts = {
+    controlSocketPaths = mkOption {
+      type = types.listOf types.str;
+      example = literalExample ''
+        [
+          "/run/kea/kea-dhcp4.socket"
+          "/run/kea/kea-dhcp6.socket"
+        ]
+      '';
+      description = ''
+        Paths to kea control sockets
+      '';
+    };
+  };
+  serviceOpts = {
+    serviceConfig = {
+      ExecStart = ''
+        ${pkgs.prometheus-kea-exporter}/bin/kea-exporter \
+          --address ${cfg.listenAddress} \
+          --port ${toString cfg.port} \
+          ${concatStringsSep " \\n" cfg.controlSocketPaths}
+      '';
+      SupplementaryGroups = [ "kea" ];
+    };
+  };
+}