nixos/prometheus-nats-exporter: new module

2 files changed, 35 insertions, 0 deletions

diff --git a/nixos/modules/services/monitoring/prometheus/exporters.nix b/nixos/modules/services/monitoring/prometheus/exporters.nix
index 640c6c339cf62..0331a07b5109d 100644
--- a/nixos/modules/services/monitoring/prometheus/exporters.nix
+++ b/nixos/modules/services/monitoring/prometheus/exporters.nix
@@ -55,6 +55,7 @@ let
     "modemmanager"
     "mongodb"
     "mysqld"
+    "nats"
     "nextcloud"
     "nginx"
     "nginxlog"
diff --git a/nixos/modules/services/monitoring/prometheus/exporters/nats.nix b/nixos/modules/services/monitoring/prometheus/exporters/nats.nix
new file mode 100644
index 0000000000000..83e60426f5ed2
--- /dev/null
+++ b/nixos/modules/services/monitoring/prometheus/exporters/nats.nix
@@ -0,0 +1,34 @@
+{ config, lib, pkgs, options, ... }:
+
+with lib;
+
+let
+
+  cfg = config.services.prometheus.exporters.nats;
+
+in
+{
+  port = 7777;
+
+  extraOpts = {
+    url = mkOption {
+      type = types.str;
+      default = "http://127.0.0.1:8222";
+      description = ''
+        NATS monitor endpoint to query.
+      '';
+    };
+  };
+
+  serviceOpts = {
+    serviceConfig = {
+      ExecStart = ''
+        ${pkgs.prometheus-nats-exporter}/bin/prometheus-nats-exporter \
+          -addr ${cfg.listenAddress} \
+          -port ${toString cfg.port} \
+          ${concatStringsSep " \\\n  " cfg.extraFlags} \
+          ${cfg.url}
+      '';
+    };
+  };
+}