From 01af3014432744e928de3b8ab5c58fb390ee8c19 Mon Sep 17 00:00:00 2001
From: WilliButz <wbutz@cyberfnord.de>
Date: Wed, 28 Mar 2018 17:21:09 +0200
Subject: [PATCH] prometheus-exporters: add dovecot exporter module

---
 .../monitoring/prometheus/exporters.nix       |  1 +
 .../prometheus/exporters/dovecot.nix          | 50 +++++++++++++++++++
 2 files changed, 51 insertions(+)
 create mode 100644 nixos/modules/services/monitoring/prometheus/exporters/dovecot.nix

diff --git a/nixos/modules/services/monitoring/prometheus/exporters.nix b/nixos/modules/services/monitoring/prometheus/exporters.nix
index 8d6ca1e40a1..180b273d177 100644
--- a/nixos/modules/services/monitoring/prometheus/exporters.nix
+++ b/nixos/modules/services/monitoring/prometheus/exporters.nix
@@ -20,6 +20,7 @@ let
   exporterOpts = {
     blackbox = import ./exporters/blackbox.nix { inherit config lib pkgs; };
     collectd = import ./exporters/collectd.nix { inherit config lib pkgs; };
+    dovecot  = import ./exporters/dovecot.nix  { inherit config lib pkgs; };
     fritzbox = import ./exporters/fritzbox.nix { inherit config lib pkgs; };
     json     = import ./exporters/json.nix     { inherit config lib pkgs; };
     minio    = import ./exporters/minio.nix    { inherit config lib pkgs; };
diff --git a/nixos/modules/services/monitoring/prometheus/exporters/dovecot.nix b/nixos/modules/services/monitoring/prometheus/exporters/dovecot.nix
new file mode 100644
index 00000000000..4ca6d4e5f8b
--- /dev/null
+++ b/nixos/modules/services/monitoring/prometheus/exporters/dovecot.nix
@@ -0,0 +1,50 @@
+{ config, lib, pkgs }:
+
+with lib;
+
+let
+  cfg = config.services.prometheus.exporters.dovecot;
+in
+{
+  port = 9166;
+  extraOpts = {
+    telemetryPath = mkOption {
+      type = types.str;
+      default = "/metrics";
+      description = ''
+        Path under which to expose metrics.
+      '';
+    };
+    socketPath = mkOption {
+      type = types.path;
+      default = "/var/run/dovecot/stats";
+      example = "/var/run/dovecot2/stats";
+      description = ''
+        Path under which the stats socket is placed.
+        The user/group under which the exporter runs,
+        should be able to access the socket in order
+        to scrape the metrics successfully.
+      '';
+    };
+    scopes = mkOption {
+      type = types.listOf types.str;
+      default = [ "user" ];
+      example = [ "user" "global" ];
+      description = ''
+        Stats scopes to query.
+      '';
+    };
+  };
+  serviceOpts = {
+    serviceConfig = {
+      ExecStart = ''
+        ${pkgs.prometheus-dovecot-exporter}/bin/dovecot_exporter \
+          --web.listen-address ${cfg.listenAddress}:${toString cfg.port} \
+          --web.telemetry-path ${cfg.telemetryPath} \
+          --dovecot.socket-path ${cfg.socketPath} \
+          --dovecot.scopes ${concatStringsSep "," cfg.scopes} \
+          ${concatStringsSep " \\\n  " cfg.extraFlags}
+      '';
+    };
+  };
+}