From 9a05a3fe5938dff2dc083a174dda78520522e1f6 Mon Sep 17 00:00:00 2001
From: QuentinBisson <quentin@giantswarm.io>
Date: Mon, 6 Nov 2023 15:23:20 +0100
Subject: [PATCH] Add keda alerting rules

Signed-off-by: QuentinBisson <quentin@giantswarm.io>
---
 CHANGELOG.md                                  |  4 ++
 .../templates/alerting-rules/keda.rules.yml   | 71 +++++++++++++++++++
 2 files changed, 75 insertions(+)
 create mode 100644 helm/prometheus-rules/templates/alerting-rules/keda.rules.yml

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9248f56d6..463467c46 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Added
+
+- Add KEDA alerting rules.
+
 ### Changed
 
 - Added `namespace` label to Flux helm release related alerts
diff --git a/helm/prometheus-rules/templates/alerting-rules/keda.rules.yml b/helm/prometheus-rules/templates/alerting-rules/keda.rules.yml
new file mode 100644
index 000000000..2e9aaaa9d
--- /dev/null
+++ b/helm/prometheus-rules/templates/alerting-rules/keda.rules.yml
@@ -0,0 +1,71 @@
+apiVersion: monitoring.coreos.com/v1
+kind: PrometheusRule
+metadata:
+  creationTimestamp: null
+  labels:
+    {{- include "labels.common" . | nindent 4 }}
+  name: keda.rules
+  namespace: {{ .Values.namespace  }}
+spec:
+  groups:
+  - name: Keda
+    rules:
+    - alert: KedaDown
+      annotations:
+        description: 'Keda is down.'
+      expr: count (up{container=~"keda-.*"} == 0) > 0
+      for: 10m
+      labels:
+        area: kaas
+        cancel_if_apiserver_down: "true"
+        cancel_if_cluster_status_creating: "true"
+        cancel_if_cluster_status_deleting: "true"
+        cancel_if_cluster_status_updating: "true"
+        severity: page
+        team: phoenix
+        topic: autoscaling
+    - alert: KedaScaledObjectErrors
+      annotations:
+        description: '{{`Errors detected in scaled object {{ $labels.scaledObject }} in namespace {{ $labels.namespace}}.`}}'
+      expr: increase(keda_scaled_object_errors[10m])> 0
+      for: 15m
+      labels:
+        area: kaas
+        cancel_if_apiserver_down: "true"
+        cancel_if_cluster_status_creating: "true"
+        cancel_if_cluster_status_deleting: "true"
+        cancel_if_cluster_status_updating: "true"
+        cancel_if_outside_working_hours: "true"
+        severity: warning
+        team: phoenix
+        topic: autoscaling
+    - alert: KedaWebhookScaledObjectValidationErrors
+      annotations:
+        description: '{{`Validation errors detected in webhook for scaled object {{ $labels.scaledObject }} in namespace {{ $labels.namespace}}.`}}'
+      expr: increase(keda_webhook_scaled_object_validation_errors[10m]) > 0
+      for: 15m
+      labels:
+        area: kaas
+        cancel_if_apiserver_down: "true"
+        cancel_if_cluster_status_creating: "true"
+        cancel_if_cluster_status_deleting: "true"
+        cancel_if_cluster_status_updating: "true"
+        cancel_if_outside_working_hours: "true"
+        severity: warning
+        team: phoenix
+        topic: autoscaling
+    - alert: KedaScalerErrors
+      annotations:
+        description: '{{`Errors detected in scaler {{ $labels.scaler }} for scaled object {{ $labels.scaledObject }} in namespace {{ $labels.namespace}}.`}}'
+      expr: increase(keda_scaler_errors[10m]) > 0
+      for: 15m
+      labels:
+        area: kaas
+        cancel_if_apiserver_down: "true"
+        cancel_if_cluster_status_creating: "true"
+        cancel_if_cluster_status_deleting: "true"
+        cancel_if_cluster_status_updating: "true"
+        cancel_if_outside_working_hours: "true"
+        severity: warning
+        team: phoenix
+        topic: autoscaling