From 7bb9f739ef55075ab3f2c8feef6c92334ead4805 Mon Sep 17 00:00:00 2001
From: Nico Felbinger <nico@felbinger.eu>
Date: Tue, 31 Dec 2024 02:15:45 +0100
Subject: [PATCH] prometheus-frr-exporter: fix communication to frr unix socket

---
 .../monitoring/prometheus/exporters/frr.nix     | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/nixos/modules/services/monitoring/prometheus/exporters/frr.nix b/nixos/modules/services/monitoring/prometheus/exporters/frr.nix
index f2d3f5a031a6..617ea8b42818 100644
--- a/nixos/modules/services/monitoring/prometheus/exporters/frr.nix
+++ b/nixos/modules/services/monitoring/prometheus/exporters/frr.nix
@@ -17,6 +17,22 @@ in
 {
   port = 9342;
   extraOpts = {
+    user = mkOption {
+      type = types.str;
+      default = "frr";
+      description = ''
+        User name under which the frr exporter shall be run.
+        The exporter talks to frr using a unix socket, which is owned by frr.
+      '';
+    };
+    group = mkOption {
+      type = types.str;
+      default = "frrtty";
+      description = ''
+        Group under which the frr exporter shall be run.
+        The exporter talks to frr using a unix socket, which is owned by frrtty group.
+      '';
+    };
     enabledCollectors = mkOption {
       type = types.listOf types.str;
       default = [ ];
@@ -38,6 +54,7 @@ in
     serviceConfig = {
       DynamicUser = false;
       RuntimeDirectory = "prometheus-frr-exporter";
+      RestrictAddressFamilies = [ "AF_UNIX" ];
       ExecStart = ''
         ${lib.getExe pkgs.prometheus-frr-exporter} \
           ${concatMapStringsSep " " (x: "--collector." + x) cfg.enabledCollectors} \