From e8312f27fee18af464186ef9aa9647296b44a0f3 Mon Sep 17 00:00:00 2001
From: Michael Act <86778470+michaelact@users.noreply.github.com>
Date: Tue, 23 Sep 2025 11:26:42 +0700
Subject: [PATCH 1/2] chore: storage usage alert

Signed-off-by: Michael Act <86778470+michaelact@users.noreply.github.com>
---
 .../rules-1.14/kubernetes-storage.yaml        | 30 ++++++++++++++++++-
 1 file changed, 29 insertions(+), 1 deletion(-)

diff --git a/charts/kube-prometheus-stack/templates/prometheus/rules-1.14/kubernetes-storage.yaml b/charts/kube-prometheus-stack/templates/prometheus/rules-1.14/kubernetes-storage.yaml
index eb3b7fcfd45c..354531d6b6e6 100644
--- a/charts/kube-prometheus-stack/templates/prometheus/rules-1.14/kubernetes-storage.yaml
+++ b/charts/kube-prometheus-stack/templates/prometheus/rules-1.14/kubernetes-storage.yaml
@@ -214,4 +214,32 @@ spec:
         {{- end }}
       {{- end }}
 {{- end }}
-{{- end }}
\ No newline at end of file
+{{- if not (.Values.defaultRules.disabled.KubernetesStorageUsage85Percent | default false) }}
+    - alert: KubernetesStorageUsage85Percent
+      annotations:
+{{- if .Values.defaultRules.additionalRuleAnnotations }}
+{{ toYaml .Values.defaultRules.additionalRuleAnnotations | indent 8 }}
+{{- end }}
+{{- if .Values.defaultRules.additionalRuleGroupAnnotations.kubernetesStorage }}
+{{ toYaml .Values.defaultRules.additionalRuleGroupAnnotations.kubernetesStorage | indent 8 }}
+{{- end }}
+        description: Storage usage of PVC {{`{{`}} $labels.namespace {{`}}`}}/{{`{{`}} $labels.persistentvolumeclaim {{`}}`}} has exceeded 85% for the last 5 minutes.
+        runbook_url: https://runbooks.prometheus-operator.dev/runbooks/node/nodefilesystemspacefillingup/#:~:text=A%20filesystem%20running%20full%20is%20very%20bad%20for%20any%20process%20in%20need%20to%20write%20to%20the%20filesystem.%20But%20even%20before%20a%20filesystem%20runs%20full%2C%20performance%20is%20usually%20degrading.
+        summary: High storage usage detected (PVC {{`{{`}} $labels.namespace {{`}}`}}/{{`{{`}} $labels.persistentvolumeclaim {{`}}`}})
+      expr: kubelet_volume_stats_used_bytes{job="kubelet", namespace{{ $namespaceOperator }}"{{ $targetNamespace }}", metrics_path="/metrics"} / kubelet_volume_stats_capacity_bytes{job="kubelet", namespace{{ $namespaceOperator }}"{{ $targetNamespace }}", metrics_path="/metrics"} * 100 > 85
+      for: {{ dig "KubernetesStorageUsage85Percent" "for" "5m" .Values.customRules }}
+      {{- with .Values.defaultRules.keepFiringFor }}
+      keep_firing_for: "{{ . }}"
+      {{- end }}
+      labels:
+        severity: {{ dig "KubernetesStorageUsage85Percent" "severity" "warning" .Values.customRules }}
+      {{- if or .Values.defaultRules.additionalRuleLabels .Values.defaultRules.additionalRuleGroupLabels.kubernetesStorage }}
+        {{- with .Values.defaultRules.additionalRuleLabels }}
+          {{- toYaml . | nindent 8 }}
+        {{- end }}
+        {{- with .Values.defaultRules.additionalRuleGroupLabels.kubernetesStorage }}
+          {{- toYaml . | nindent 8 }}
+        {{- end }}
+      {{- end }}
+{{- end }}
+{{- end }}

From 62c5dfc4facaa5d99cef38c8d48776ce4a7d8d4e Mon Sep 17 00:00:00 2001
From: Michael Act <86778470+michaelact@users.noreply.github.com>
Date: Tue, 23 Sep 2025 11:30:48 +0700
Subject: [PATCH 2/2] chore: bump chart version

Signed-off-by: Michael Act <86778470+michaelact@users.noreply.github.com>
---
 charts/kube-prometheus-stack/Chart.yaml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/charts/kube-prometheus-stack/Chart.yaml b/charts/kube-prometheus-stack/Chart.yaml
index d5044a9594b0..687d5632c30b 100644
--- a/charts/kube-prometheus-stack/Chart.yaml
+++ b/charts/kube-prometheus-stack/Chart.yaml
@@ -31,7 +31,7 @@ name: kube-prometheus-stack
 sources:
   - https://github.com/prometheus-community/helm-charts
   - https://github.com/prometheus-operator/kube-prometheus
-version: 77.10.0
+version: 77.11.0
 # renovate: github=prometheus-operator/prometheus-operator
 appVersion: v0.85.0
 kubeVersion: ">=1.25.0-0"