[stable/kube-state-metrics] add optional prometheus service monitor (#12145)

* [stable/kube-state-metrics] add optional prometheus service monitor

Signed-off-by: Ryan Belgrave <ryan.belgrave@optum.com>

* bump chart version to 1.0.0

Signed-off-by: Ryan Belgrave <ryan.belgrave@optum.com>

stable/kube-state-metrics/Chart.yaml

@@ -5,7 +5,7 @@ keywords:
 - metric
 - monitoring
 - prometheus
-version: 0.16.0
+version: 1.0.0
 appVersion: 1.5.0
 home: https://github.com/kubernetes/kube-state-metrics/
 sources:

stable/kube-state-metrics/README.md

@@ -54,3 +54,6 @@ $ helm install stable/kube-state-metrics
 | `collectors.secrets`                  | Enable the secrets collector.                           | true                                        |
 | `collectors.services`                 | Enable the services collector.                          | true                                        |
 | `collectors.statefulsets`             | Enable the statefulsets collector.                      | true                                        |
+| `prometheus.monitor.enabled`          | Set this to `true` to create ServiceMonitor for Prometheus operator | `false` |
+| `prometheus.monitor.additionalLabels` | Additional labels that can be used so ServiceMonitor will be discovered by Prometheus | `{}` |
+| `prometheus.monitor.namespace`        | namespace where servicemonitor resource should be created | `the same namespace as kube-state-metrics` |

stable/kube-state-metrics/templates/monitor.yaml

@@ -0,0 +1,23 @@
+{{- if .Values.prometheus.monitor.enabled }}
+apiVersion: monitoring.coreos.com/v1
+kind: ServiceMonitor
+metadata:
+  name: {{ template "kube-state-metrics.fullname" . }}
+  labels:
+    name: {{ template "kube-state-metrics.fullname" . }}
+    labels:
+      app: {{ template "kube-state-metrics.name" . }}
+      chart: "{{ .Chart.Name }}-{{ .Chart.Version }}"
+      release: "{{ .Release.Name }}"
+      heritage: "{{ .Release.Service }}"
+      {{- if .Values.prometheus.monitor.additionalLabels }}
+{{ toYaml .Values.prometheus.monitor.additionalLabels | indent 4 }}
+      {{- end }}
+spec:
+  selector:
+    matchLabels:
+      app: {{ template "kube-state-metrics.name" . }}
+      release: {{ .Release.Name }}
+  endpoints:
+    - port: http
+{{- end }}

stable/kube-state-metrics/values.yaml

@@ -28,6 +28,12 @@ serviceAccount:
   # ref: https://kubernetes.io/docs/tasks/configure-pod-container/pull-image-private-registry/
   imagePullSecrets: []
 
+prometheus:
+  monitor:
+    enabled: false
+    additionalLabels: {}
+    namespace: ""
+
 ## Specify if a Pod Security Policy for kube-state-metrics must be created
 ## Ref: https://kubernetes.io/docs/concepts/policy/pod-security-policy/
 ##