nixos/prometheus.exporters.graphite: init

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

@@ -35,6 +35,7 @@ let
     "dovecot"
     "fastly"
     "fritzbox"
+    "graphite"
     "influxdb"
     "ipmi"
     "json"

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

@@ -0,0 +1,41 @@
+{ config, lib, pkgs, options }:
+
+let
+  cfg = config.services.prometheus.exporters.graphite;
+  format = pkgs.formats.yaml { };
+in
+{
+  port = 9108;
+  extraOpts = {
+    graphitePort = lib.mkOption {
+      type = lib.types.port;
+      default = 9109;
+      description = lib.mdDoc ''
+        Port to use for the graphite server.
+      '';
+    };
+    mappingSettings = lib.mkOption {
+      type = lib.types.submodule {
+        freeformType = format.type;
+        options = { };
+      };
+      default = { };
+      description = lib.mdDoc ''
+        Mapping configuration for the exporter, see
+        <https://github.com/prometheus/graphite_exporter#yaml-config> for
+        available options.
+      '';
+    };
+  };
+  serviceOpts = {
+    serviceConfig = {
+      ExecStart = ''
+        ${pkgs.prometheus-graphite-exporter}/bin/graphite_exporter \
+          --web.listen-address ${cfg.listenAddress}:${toString cfg.port} \
+          --graphite.listen-address ${cfg.listenAddress}:${toString cfg.graphitePort} \
+          --graphite.mapping-config ${format.generate "mapping.yml" cfg.mappingSettings} \
+          ${lib.concatStringsSep " \\\n  " cfg.extraFlags}
+      '';
+    };
+  };
+}