From 2bd3d14a95561bcc4fa0e75635dea7ebce31c64f Mon Sep 17 00:00:00 2001
From: Malte Brandy <malte.brandy@maralorn.de>
Date: Tue, 1 Dec 2020 02:38:22 +0100
Subject: [PATCH] Add postfix alert rule

---
 nixos/roles/monitoring/rules.yml | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/nixos/roles/monitoring/rules.yml b/nixos/roles/monitoring/rules.yml
index 8e70df55..6ec41b39 100644
--- a/nixos/roles/monitoring/rules.yml
+++ b/nixos/roles/monitoring/rules.yml
@@ -43,3 +43,9 @@ groups:
             severity: warning
           annotations:
             description: "mountpoint {{ $labels.mountpoint }} on {{ $labels.name }} out of inodes."
+        - alert: mailq
+          expr: postfix_showq_message_age_seconds_sum > 300
+          for: 5m
+          labels:
+             severity: warning
+             description: "mail queue {{ $labels.queue }} on {{ $labels.instance }} has accumulated a waiting time of {{ $value }}s.