[stable/prometheus-operator] Allow metricRelabelings in default kube-state-metrics exporter (#12960)

* [stable/prometheus-operator] metricRelabelings in kube-state exporter

Signed-off-by: Marcos Estevez <marcos.stvz@gmail.com>

* Adding kubeStateMetrics.serviceMonitor.metricRelabelings to ci

Signed-off-by: Marcos Estevez <marcos.stvz@gmail.com>

stable/prometheus-operator/Chart.yaml

@@ -9,7 +9,7 @@ name: prometheus-operator
 sources:
   - https://github.com/coreos/prometheus-operator
   - https://coreos.com/operators/prometheus
-version: 5.0.10
+version: 5.0.11
 appVersion: 0.29.0
 home: https://github.com/coreos/prometheus-operator
 keywords:

stable/prometheus-operator/README.md

@@ -358,6 +358,7 @@ The following tables list the configurable parameters of the prometheus-operator
 | `kubeScheduler.serviceMonitor.interval` | Scrape interval. If not set, the Prometheus default scrape interval is used | `nil` |
 | `kubeStateMetrics.enabled` | Deploy the `kube-state-metrics` chart and configure a servicemonitor to scrape | `true` |
 | `kubeStateMetrics.serviceMonitor.interval` | Scrape interval. If not set, the Prometheus default scrape interval is used | `nil` |
+| `kubeStateMetrics.serviceMonitor.metricRelabelings` | Metric relablings for the `kube-state-metrics` ServiceMonitor | `[]` |
 | `kube-state-metrics.rbac.create` | Create RBAC components in kube-state-metrics. See `global.rbac.create` | `true` |
 | `kube-state-metrics.podSecurityPolicy.enabled` | Create pod security policy resource for kube-state-metrics. | `true` |
 | `nodeExporter.enabled` | Deploy the `prometheus-node-exporter` and scrape it | `true` |

stable/prometheus-operator/ci/test-values.yaml

@@ -590,6 +590,13 @@ kubeStateMetrics:
     ##
     interval: ""
 
+    ## 	metric relabel configs to apply to samples before ingestion.
+    ##
+    metricRelabelings: []
+    # - action: keep
+    #   regex: 'kube_(daemonset|deployment|pod|namespace|node|statefulset).+'
+    #   sourceLabels: [__name__]
+
 ## Configuration for kube-state-metrics subchart
 ##
 kube-state-metrics:

stable/prometheus-operator/templates/exporters/kube-state-metrics/serviceMonitor.yaml

@@ -14,6 +14,10 @@ spec:
     interval: {{ .Values.kubeStateMetrics.serviceMonitor.interval }}
     {{- end }}
     honorLabels: true
+{{- if .Values.kubeStateMetrics.serviceMonitor.metricRelabelings }}
+    metricRelabelings:
+{{ toYaml .Values.kubeStateMetrics.serviceMonitor.metricRelabelings | indent 4 }}
+{{- end }}
   selector:
     matchLabels:
       app: kube-state-metrics

stable/prometheus-operator/values.yaml

@@ -590,6 +590,13 @@ kubeStateMetrics:
     ##
     interval: ""
 
+    ## 	metric relabel configs to apply to samples before ingestion.
+    ##
+    metricRelabelings: []
+    # - action: keep
+    #   regex: 'kube_(daemonset|deployment|pod|namespace|node|statefulset).+'
+    #   sourceLabels: [__name__]
+
 ## Configuration for kube-state-metrics subchart
 ##
 kube-state-metrics: