[stable/prometheus] Add support for kube-state-metrics container arguments (#2368)

* add support for specifying args to kube-state-metrics

* Update Chart.yaml

stable/prometheus/Chart.yaml

@@ -1,5 +1,5 @@
 name: prometheus
-version: 4.6.16
+version: 4.6.17
 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

stable/prometheus/README.md

@@ -88,6 +88,7 @@ Parameter | Description | Default
 `kubeStateMetrics.image.repository` | kube-state-metrics container image repository| `k8s.gcr.io/kube-state-metrics`
 `kubeStateMetrics.image.tag` | kube-state-metrics container image tag | `v0.4.1`
 `kubeStateMetrics.image.pullPolicy` | kube-state-metrics container image pull policy | `IfNotPresent`
+`kubeStateMetrics.args` | kube-state-metrics container arguments | `{}`
 `kubeStateMetrics.nodeSelector` | node labels for kube-state-metrics pod assignment | `{}`
 `kubeStateMetrics.podAnnotations` | annotations to be added to kube-state-metrics pods | `{}`
 `kubeStateMetrics.replicaCount` | desired number of kube-state-metrics pods | `1`

stable/prometheus/templates/kube-state-metrics-deployment.yaml

@@ -27,6 +27,12 @@ spec:
         - name: {{ template "prometheus.name" . }}-{{ .Values.kubeStateMetrics.name }}
           image: "{{ .Values.kubeStateMetrics.image.repository }}:{{ .Values.kubeStateMetrics.image.tag }}"
           imagePullPolicy: "{{ .Values.kubeStateMetrics.image.pullPolicy }}"
+        {{- if .Values.kubeStateMetrics.args }}
+          args:
+          {{- range $key, $value := .Values.kubeStateMetrics.args }}
+            - --{{ $key }}={{ $value }}
+          {{- end }}
+        {{- end }}
           ports:
             - name: metrics
               containerPort: 8080

stable/prometheus/values.yaml

@@ -194,6 +194,10 @@ kubeStateMetrics:
     tag: v1.1.0-rc.0
     pullPolicy: IfNotPresent
 
+  ## kube-state-metrics container arguments
+  ##
+  args: {}
+
   ## Node labels for kube-state-metrics pod assignment
   ## Ref: https://kubernetes.io/docs/user-guide/node-selection/
   ##