[KYUUBI #6006] Support additional labels for service monitor

charts/kyuubi/templates/kyuubi-servicemonitor.yaml

@@ -22,6 +22,9 @@ metadata:
   name: {{ .Release.Name }}
   labels:
     {{- include "kyuubi.labels" . | nindent 4 }}
+    {{- if .Values.serviceMonitor.additionalLabels }}
+    {{- toYaml .Values.serviceMonitor.additionalLabels | nindent 4 }}
+    {{- end }}
 spec:
   selector:
     matchLabels:

charts/kyuubi/values.yaml

@@ -297,6 +297,8 @@ serviceMonitor:
   # The endpoints section in a ServiceMonitor specifies the metrics information for each target endpoint.
   # This allows you to collect metrics from multiple Services across your Kubernetes cluster in a standardized and automated way.
   endpoints: []
+  # Additional labels that can be used so ServiceMonitor will be discovered by Prometheus
+  additionalLabels: {}
 
 # Rules for the Prometheus Operator
 prometheusRule: