[kube-prometheus-stack] - Allow out_of_order_time_window in Prometheu…

…s spec (#2960)

Prometheus >= 2.39.0 adds support for out-of-order samples
by way of an experimental TSDB feature out_of_order_time_window.

This adds support for this feature in the PrometheusSpec used
by the prometheus-operator, noting that it's not available
as an additional arg at this point in time.

Signed-off-by: Marc de Beer <marcdebeer@nine.com.au>
Co-authored-by: Marc de Beer <marcdebeer@nine.com.au>

charts/kube-prometheus-stack/Chart.yaml

@@ -21,7 +21,7 @@ name: kube-prometheus-stack
 sources:
   - https://github.com/prometheus-community/helm-charts
   - https://github.com/prometheus-operator/kube-prometheus
-version: 45.7.1
+version: 45.8.0
 appVersion: v0.63.0
 kubeVersion: ">=1.16.0-0"
 home: https://github.com/prometheus-operator/kube-prometheus

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

@@ -117,6 +117,12 @@ spec:
 {{- if .Values.prometheus.prometheusSpec.retentionSize }}
   retentionSize: {{ .Values.prometheus.prometheusSpec.retentionSize | quote }}
 {{- end }}
+{{- if .Values.prometheus.prometheusSpec.tsdb }}
+  tsdb:
+    {{- if .Values.prometheus.prometheusSpec.tsdb.outOfOrderTimeWindow }}
+    outOfOrderTimeWindow: {{ .Values.prometheus.prometheusSpec.tsdb.outOfOrderTimeWindow }}
+    {{- end }}
+{{- end }}
 {{- if eq .Values.prometheus.prometheusSpec.walCompression false }}
   walCompression: false
 {{ else }}

charts/kube-prometheus-stack/values.yaml

@@ -2870,6 +2870,11 @@ prometheus:
     ##
     retentionSize: ""
 
+    ## Allow out-of-order/out-of-bounds samples ingested into Prometheus for a specified duration
+    ## See https://prometheus.io/docs/prometheus/latest/configuration/configuration/#tsdb
+    tsdb:
+      outOfOrderTimeWindow: 0s
+
     ## Enable compression of the write-ahead log using Snappy.
     ##
     walCompression: true