feat(erpc): add metricRelabelings support to ServiceMonitor (#274)

Enable post-scrape metric filtering via ServiceMonitor metricRelabelings.
This allows consumers to drop or relabel metrics before they are
committed to the WAL and remote-written to the metrics backend.

Author: devkoriel

charts/erpc/Chart.yaml

@@ -21,7 +21,7 @@ type: application
 # This is the chart version. This version number should be incremented each time you make changes
 # to the chart and its templates, including the app version.
 # Versions are expected to follow Semantic Versioning (https://semver.org/)
-version: 0.6.1
+version: 0.6.2
 
 # This is the version number of the application being deployed. This version number should be
 # incremented each time you make changes to the application. Versions are not expected to

charts/erpc/templates/servicemonitor.yaml

@@ -33,6 +33,10 @@ spec:
     relabelings:
     {{- toYaml .Values.serviceMonitor.relabelings | nindent 4 }}
     {{- end }}
+    {{- if .Values.serviceMonitor.metricRelabelings }}
+    metricRelabelings:
+    {{- toYaml .Values.serviceMonitor.metricRelabelings | nindent 4 }}
+    {{- end }}
   jobLabel: "{{ .Release.Name }}"
   selector:
     matchLabels:

charts/erpc/values.yaml

@@ -381,5 +381,7 @@ serviceMonitor:
   scrapeTimeout: 30s
   # -- ServiceMonitor relabelings
   relabelings: []
+  # -- ServiceMonitor metricRelabelings
+  metricRelabelings: []
 
 extraObjects: []