From 867c06a57476b565fdfb1a4a3e68595aac64f6a7 Mon Sep 17 00:00:00 2001
From: 0xFEEDC0DE64 <daniel@brunner.ninja>
Date: Sat, 24 Oct 2026 20:20:43 +0200
Subject: [PATCH] Delay missing-backup alert until first schedule is due

---
 apps/prometheus/resources/backup-alerts.yaml | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/apps/prometheus/resources/backup-alerts.yaml b/apps/prometheus/resources/backup-alerts.yaml
index 3403998..bdf9340 100644
--- a/apps/prometheus/resources/backup-alerts.yaml
+++ b/apps/prometheus/resources/backup-alerts.yaml
@@ -18,7 +18,15 @@ spec:
             summary: "Backup job failed"
             description: "{{ $labels.namespace }}/{{ $labels.job_name }} failed; inspect its pod logs and /mnt/backup mount."
         - alert: ArschrockPostgreSQLBackupStale
-          expr: (time() - kube_cronjob_status_last_successful_time{namespace="backup",cronjob="arschrock-postgresql-backup"} > 90000) or (kube_cronjob_info{namespace="backup",cronjob="arschrock-postgresql-backup"} unless kube_cronjob_status_last_successful_time{namespace="backup",cronjob="arschrock-postgresql-backup"})
+          expr: |-
+            (time() - kube_cronjob_status_last_successful_time{namespace="backup",cronjob="arschrock-postgresql-backup"} > 90000)
+            or
+            (
+              (kube_cronjob_info{namespace="backup",cronjob="arschrock-postgresql-backup"}
+                unless kube_cronjob_status_last_successful_time{namespace="backup",cronjob="arschrock-postgresql-backup"})
+              and on(namespace,cronjob)
+              (time() - kube_cronjob_created{namespace="backup",cronjob="arschrock-postgresql-backup"} > 90000)
+            )
           for: 10m
           labels:
             severity: critical