feat(argo-workflows): add Prometheus ServiceMonitor relabelings, metricRelabelings & targetLabels

Signed-off-by: Stefan Tertan <stefan.tertan@fundingcircle.com>

charts/argo-workflows/templates/controller/workflow-controller-servicemonitor.yaml

@@ -15,11 +15,31 @@ spec:
     - port: metrics
       path: {{ .Values.controller.metricsConfig.path }}
       interval: 30s
+      {{- with .Values.controller.metricsConfig.relabelings }}
+      relabelings:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      {{- with .Values.controller.metricsConfig.metricRelabelings }}
+      metricRelabelings:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
   {{- end }}
   {{- if .Values.controller.telemetryConfig.enabled }}
     - port: telemetry
       path: {{ .Values.controller.telemetryConfig.path }}
       interval: 30s
+      {{- with .Values.controller.metricsConfig.relabelings }}
+      relabelings:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      {{- with .Values.controller.metricsConfig.metricRelabelings }}
+      metricRelabelings:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+  {{- end }}
+  {{- with .Values.controller.metricsConfig.targetLabels }}
+  targetLabels:
+    {{- toYaml . | nindent 8 }}
   {{- end }}
   namespaceSelector:
     matchNames:

charts/argo-workflows/values.yaml

@@ -111,6 +111,15 @@ controller:
     servicePort: 8080
     # -- Service metrics port name
     servicePortName: metrics
+    # -- ServiceMonitor relabel configs to apply to samples before scraping
+    # https://github.com/prometheus-operator/prometheus-operator/blob/master/Documentation/api.md#relabelconfig
+    relabelings: []
+    # -- ServiceMonitor metric relabel configs to apply to samples before ingestion
+    # https://github.com/prometheus-operator/prometheus-operator/blob/main/Documentation/api.md#endpoint
+    metricRelabelings: []
+    # --ServiceMonitor will add labels from the service to the Prometheus metric
+    # https://github.com/prometheus-operator/prometheus-operator/blob/main/Documentation/api.md#servicemonitorspec
+    targetLabels: []
   # -- the controller container's securityContext
   securityContext:
     readOnlyRootFilesystem: true