From a2e115f091fe70517eb3e461d2d38dc86c64577f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?K=C3=A1r=C3=A1ndi=20Tam=C3=A1s?= <tkarandi@gmail.com>
Date: Thu, 3 Aug 2023 15:17:28 +0200
Subject: [PATCH] Support nginx error logs in promtail scrape configs

---
 modules/wireguard-monitoring/default.nix | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/modules/wireguard-monitoring/default.nix b/modules/wireguard-monitoring/default.nix
index 7290394..8f48559 100644
--- a/modules/wireguard-monitoring/default.nix
+++ b/modules/wireguard-monitoring/default.nix
@@ -80,10 +80,23 @@ in {
               replacement = "$2";
             }
           ];
-        }];
+        }] ++ (if config.services.nginx.enable
+            then [{
+              job_name = "nginx-error-logs";
+              static_configs = [{
+                targets = [ "localhost" ];
+                labels = {
+                  job = "nginx-error-logs";
+                  host = config.networking.hostName;
+                  __path__ = "/var/log/nginx/*error.log";
+                };
+              }];
+            }] else []);
       };
     };
 
+    users.users.promtail.extraGroups = lib.mkIf config.services.nginx.enable [ "nginx" ];
+
     # wait for wireguard before starting node-exporter
     systemd.services.prometheus-node-exporter.after = [ "wireguard-wg0.service" ];
   };