From 22399db00a15f9509c8326aec7f8c6b814101e93 Mon Sep 17 00:00:00 2001
From: Artyom Babiy <artyom.babiy@gmail.com>
Date: Thu, 17 Jul 2025 16:24:34 +0300
Subject: [PATCH] feat(cluster): add prom rule alert for failed backups

Signed-off-by: Artyom Babiy <artyom.babiy@gmail.com>
---
 .../prometheus_rules/cluster-backup_failed.yaml | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)
 create mode 100644 charts/cluster/prometheus_rules/cluster-backup_failed.yaml

diff --git a/charts/cluster/prometheus_rules/cluster-backup_failed.yaml b/charts/cluster/prometheus_rules/cluster-backup_failed.yaml
new file mode 100644
index 0000000000..80b58ceedb
--- /dev/null
+++ b/charts/cluster/prometheus_rules/cluster-backup_failed.yaml
@@ -0,0 +1,17 @@
+{{- $alert := "CNPGClusterBackupFailed" -}}
+{{- if not (has $alert .excludeRules) -}}
+alert: {{ $alert }}
+annotations:
+  summary: CNPG Cluster backup has failed.
+  description: |-
+    Backup for CloudNativePG Cluster "{{ .namespace }}/{{ .cluster }}" has failed.
+expr: |
+  sum by (namespace) (cnpg_collector_last_failed_backup_timestamp{namespace="{{ .namespace }}", pod=~"{{ .podSelector }}"})
+  >
+  sum by (namespace) (cnpg_collector_last_available_backup_timestamp{namespace="{{ .namespace }}", pod=~"{{ .podSelector }}"})
+for: 5m
+labels:
+  severity: warning
+  namespace: {{ .namespace }}
+  cnpg_cluster: {{ .cluster }}
+{{- end -}}