[stable/prometheus-operator] Add metricRelabelings to node exporter servicemonitor (#11937)

Signed-off-by: Wei Kin Huang <weikin.huang04@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: 4.3.0
+version: 4.3.1
 appVersion: 0.29.0
 home: https://github.com/coreos/prometheus-operator
 keywords:

stable/prometheus-operator/README.md

@@ -318,6 +318,7 @@ The following tables lists the configurable parameters of the prometheus-operato
 | `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` |
 | `nodeExporter.jobLabel` | The name of the label on the target service to use as the job name in prometheus. See `prometheus-node-exporter.podLabels.jobLabel=node-exporter` default | `jobLabel` |
+| `nodeExporter.serviceMonitor.metricRelabelings` | Metric relablings for the `prometheus-node-exporter` ServiceMonitor | `[]` |
 | `prometheus-node-exporter.podLabels` | Additional labels for pods in the DaemonSet | `{"jobLabel":"node-exporter"}` |
 | `prometheus-node-exporter.extraArgs` | Additional arguments for the node exporter container | `["--collector.filesystem.ignored-mount-points=^/(dev|proc|sys|var/lib/docker/.+)($|/)", "--collector.filesystem.ignored-fs-types=^(autofs|binfmt_misc|cgroup|configfs|debugfs|devpts|devtmpfs|fusectl|hugetlbfs|mqueue|overlay|proc|procfs|pstore|rpc_pipefs|securityfs|sysfs|tracefs)$"]` |
 

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

@@ -531,6 +531,16 @@ nodeExporter:
   ##
   jobLabel: jobLabel
 
+  serviceMonitor: {}
+    ## 	metric relabel configs to apply to samples before ingestion.
+    ##
+    # metricRelabelings:
+    # - sourceLabels: [__name__]
+    #   separator: ;
+    #   regex: ^node_mountstats_nfs_(event|operations|transport)_.+
+    #   replacement: $1
+    #   action: drop
+
 ## Configuration for prometheus-node-exporter subchart
 ##
 prometheus-node-exporter:

stable/prometheus-operator/templates/exporters/node-exporter/servicemonitor.yaml

@@ -15,4 +15,8 @@ spec:
   endpoints:
   - port: metrics
     interval: 30s
+{{- if .Values.nodeExporter.serviceMonitor.metricRelabelings }}
+    metricRelabelings:
+{{ toYaml .Values.nodeExporter.serviceMonitor.metricRelabelings | indent 4 }}
+{{- end }}
 {{- end }}

stable/prometheus-operator/values.yaml

@@ -544,6 +544,16 @@ nodeExporter:
   ##
   jobLabel: jobLabel
 
+  serviceMonitor: {}
+    ## 	metric relabel configs to apply to samples before ingestion.
+    ##
+    # metricRelabelings:
+    # - sourceLabels: [__name__]
+    #   separator: ;
+    #   regex: ^node_mountstats_nfs_(event|operations|transport)_.+
+    #   replacement: $1
+    #   action: drop
+
 ## Configuration for prometheus-node-exporter subchart
 ##
 prometheus-node-exporter: