[kube-prometheus-stack] introduce PVC claim retention field in prometheus operator

charts/kube-prometheus-stack/Chart.yaml

@@ -23,7 +23,7 @@ name: kube-prometheus-stack
 sources:
   - https://github.com/prometheus-community/helm-charts
   - https://github.com/prometheus-operator/kube-prometheus
-version: 59.0.0
+version: 59.1.0
 appVersion: v0.74.0
 kubeVersion: ">=1.19.0-0"
 home: https://github.com/prometheus-operator/kube-prometheus

charts/kube-prometheus-stack/templates/prometheus/prometheus.yaml

@@ -261,6 +261,10 @@ spec:
   storage:
 {{ tpl (toYaml .Values.prometheus.prometheusSpec.storageSpec | indent 4) . }}
 {{- end }}
+{{- with .Values.prometheus.prometheusSpec.persistentVolumeClaimRetentionPolicy }}
+  persistentVolumeClaimRetentionPolicy:
+    {{- toYaml . | nindent 4 }}
+{{- end }}
 {{- if .Values.prometheus.prometheusSpec.podMetadata }}
   podMetadata:
 {{ tpl (toYaml .Values.prometheus.prometheusSpec.podMetadata | indent 4) . }}

charts/kube-prometheus-stack/values.yaml

@@ -3365,6 +3365,15 @@ prometheus:
   ## ref: https://github.com/prometheus-operator/prometheus-operator/blob/main/Documentation/api.md#prometheusspec
   ##
   prometheusSpec:
+    ## Statefulset's persistent volume claim retention policy
+    ## pvcDeleteOnStsDelete and pvcDeleteOnStsScale determine whether
+    ## statefulset's PVCs are deleted (true) or retained (false) on scaling down
+    ## and deleting statefulset, respectively. Requires 1.27.0+.
+    ## Ref: https://kubernetes.io/docs/concepts/workloads/controllers/statefulset/#persistentvolumeclaim-retention
+    persistentVolumeClaimRetentionPolicy: {}
+    #  whenDeleted: Retain
+    #  whenScaled: Retain
+
     ## If true, pass --storage.tsdb.max-block-duration=2h to prometheus. This is already done if using Thanos
     ##
     disableCompaction: false