Add relabelings config for node-exporter ServiceMonitor (#22764)

Signed-off-by: Hong Shick Pak <hong@hspak.com>

stable/prometheus-node-exporter/Chart.yaml

@@ -2,7 +2,7 @@ apiVersion: v1
 appVersion: 1.0.0
 description: A Helm chart for prometheus node-exporter
 name: prometheus-node-exporter
-version: 1.10.0
+version: 1.11.0
 home: https://github.com/prometheus/node_exporter/
 sources:
 - https://github.com/prometheus/node_exporter/

stable/prometheus-node-exporter/README.md

@@ -67,6 +67,7 @@ The following table lists the configurable parameters of the Node Exporter chart
 | `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 prometheus node exporter` |
+| `prometheus.monitor.relabelings`      | Relabelings that should be applied on the ServerMonitor                                                                       | `{}` |
 | `prometheus.monitor.scrapeTimeout`    | Timeout after which the scrape is ended                                                                                       | `10s`                                            |
 | `configmaps`                          | Allow mounting additional configmaps.                                                                                         | `[]`                                             |
 | `namespaceOverride`                   | Override the deployment namespace                                                                                             | `""` (`Release.Namespace`)                       |

stable/prometheus-node-exporter/templates/monitor.yaml

@@ -18,4 +18,8 @@ spec:
       {{- if .Values.prometheus.monitor.scrapeTimeout }}
       scrapeTimeout: {{ .Values.prometheus.monitor.scrapeTimeout }}
       {{- end }}
+{{- if .Values.prometheus.monitor.relabelings }}
+      relabelings:
+{{ toYaml .Values.prometheus.monitor.relabelings | indent 6 }}
+{{- end }}
 {{- end }}

stable/prometheus-node-exporter/values.yaml

@@ -21,6 +21,7 @@ prometheus:
     additionalLabels: {}
     namespace: ""
 
+    relabelings: []
     scrapeTimeout: 10s
 
 ## Customize the updateStrategy if set