From 4dadb8202b1d5c1be0b0c72674b66ab9f4b61361 Mon Sep 17 00:00:00 2001
From: Tom Hughes <tom@compton.nu>
Date: Thu, 20 Aug 2026 22:55:21 +0100
Subject: [PATCH] Fix overdue low zoom render alert

---
 cookbooks/prometheus/templates/default/alert_rules.yml.erb | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/cookbooks/prometheus/templates/default/alert_rules.yml.erb b/cookbooks/prometheus/templates/default/alert_rules.yml.erb
index ff38880a6..3d28c3359 100644
--- a/cookbooks/prometheus/templates/default/alert_rules.yml.erb
+++ b/cookbooks/prometheus/templates/default/alert_rules.yml.erb
@@ -921,8 +921,8 @@ groups:
         annotations:
           render_rate: "{{ $value }} tiles/s"
       - alert: low zoom render time
-        expr: node_systemd_unit_state{state="active",name="render-lowzoom.service"} == 1
-        for: 24h
+        expr: min_over_time(node_systemd_unit_state{state="active",name="render-lowzoom.service"}[24h]) == 1
+        for: 0m
         labels:
           alertgroup: tile
   - name: time
-- 
2.47.3