From b1032db5a9a2c65737a4fb2a8410224e6b87db56 Mon Sep 17 00:00:00 2001
From: Andreas Rammhold <andreas@rammhold.de>
Date: Sun, 4 Nov 2018 16:58:13 +0100
Subject: nixos/prometheus: check alertmanager configuration

---
 .../services/monitoring/prometheus/alertmanager.nix      | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

(limited to 'nixos/modules/services/monitoring/prometheus/alertmanager.nix')

diff --git a/nixos/modules/services/monitoring/prometheus/alertmanager.nix b/nixos/modules/services/monitoring/prometheus/alertmanager.nix
index ae294478819..cec5bb8df86 100644
--- a/nixos/modules/services/monitoring/prometheus/alertmanager.nix
+++ b/nixos/modules/services/monitoring/prometheus/alertmanager.nix
@@ -5,10 +5,18 @@ with lib;
 let
   cfg = config.services.prometheus.alertmanager;
   mkConfigFile = pkgs.writeText "alertmanager.yml" (builtins.toJSON cfg.configuration);
-  alertmanagerYml =
-    if cfg.configText != null then
-      pkgs.writeText "alertmanager.yml" cfg.configText
-    else mkConfigFile;
+
+  checkedConfig = file: pkgs.runCommand "checked-config" { buildInputs = [ cfg.package ]; } ''
+    ln -s ${file} $out
+    amtool check-config $out
+  '';
+
+  alertmanagerYml = let
+    yml = if cfg.configText != null then
+        pkgs.writeText "alertmanager.yml" cfg.configText
+        else mkConfigFile;
+    in checkedConfig yml;
+
   cmdlineArgs = cfg.extraFlags ++ [
     "--config.file ${alertmanagerYml}"
     "--web.listen-address ${cfg.listenAddress}:${toString cfg.port}"
-- 
cgit 1.4.1