From 5d5109683912682435d8e7012cfb6a7a20962af8 Mon Sep 17 00:00:00 2001
From: WilliButz <wbutz@cyberfnord.de>
Date: Mon, 7 Sep 2020 10:14:33 +0200
Subject: [PATCH] nixos/prometheus-exporters: fix default firewall filter

Instead of always using the default port of one exporter for its default
firewall filter, the port from the current service configuration is used.
---
 nixos/modules/services/monitoring/prometheus/exporters.nix | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/nixos/modules/services/monitoring/prometheus/exporters.nix b/nixos/modules/services/monitoring/prometheus/exporters.nix
index 59748efe0ded..a5492d972f15 100644
--- a/nixos/modules/services/monitoring/prometheus/exporters.nix
+++ b/nixos/modules/services/monitoring/prometheus/exporters.nix
@@ -84,7 +84,8 @@ let
     };
     firewallFilter = mkOption {
       type = types.str;
-      default = "-p tcp -m tcp --dport ${toString port}";
+      default = "-p tcp -m tcp --dport ${toString cfg.${name}.port}";
+      defaultText = "-p tcp -m tcp --dport ${toString port}";
       example = literalExample ''
         "-i eth0 -p tcp -m tcp --dport ${toString port}"
       '';