add prometheus data retention config (#2108)

stable/prometheus/Chart.yaml

@@ -1,5 +1,5 @@
 name: prometheus
-version: 4.6.1
+version: 4.6.2
 description: Prometheus is a monitoring system and time series database.
 home: https://prometheus.io/
 icon: https://raw.githubusercontent.com/prometheus/prometheus.github.io/master/assets/prometheus_logo-cb55bb5c346.png
@@ -9,6 +9,6 @@ sources:
   - https://github.com/prometheus/pushgateway
   - https://github.com/kubernetes/kube-state-metrics
 maintainers:
-  - name: Michael Goodness
+  - name: mgoodness
     email: mgoodness@gmail.com
 engine: gotpl

stable/prometheus/README.md

@@ -176,6 +176,7 @@ Parameter | Description | Default
 `server.service.servicePort` | Prometheus server service port | `80`
 `server.service.type` | type of Prometheus server service to create | `ClusterIP`
 `server.terminationGracePeriodSeconds` | Prometheus server Pod termination grace period | `300`
+`server.retention` | (optional) Prometheus data retention | `""`
 `serverFiles.alerts` | Prometheus server alerts configuration | `""`
 `serverFiles.rules` | Prometheus server rules configuration | `""`
 `serverFiles.prometheus.yml` | Prometheus server scrape configuration | example configuration

stable/prometheus/templates/server-deployment.yaml

@@ -42,6 +42,9 @@ spec:
           args:
           {{- if or .Values.alertmanager.enabled .Values.server.alertmanagerURL }}
             - --alertmanager.url={{- if .Values.alertmanager.enabled }}http://{{ template "prometheus.alertmanager.fullname" . }}:{{ .Values.alertmanager.service.servicePort }}{{ .Values.alertmanager.baseURL }}{{- else }}{{ .Values.server.alertmanagerURL }}{{- end }}
+          {{- end }}
+          {{- if .Values.server.retention }}
+            - --storage.local.retention = {{ .Values.server.retention }}
           {{- end }}
             - --config.file=/etc/config/prometheus.yml
             - --storage.local.path={{ .Values.server.persistentVolume.mountPath }}

stable/prometheus/values.yaml

@@ -464,6 +464,10 @@ server:
   ##
   terminationGracePeriodSeconds: 300
 
+  ## Prometheus data retention period (i.e 360h)
+  ##
+  retention: ""
+
 pushgateway:
   ## If false, pushgateway will not be installed
   ##