Add configurable serviceMonitor metricRelabelling and targetLabels

Signed-off-by: Calvin Bui <3604363+calvinbui@users.noreply.github.com>

charts/ingress-nginx/Chart.yaml

@@ -1,6 +1,6 @@
 apiVersion: v1
 name: ingress-nginx
-version: 2.11.3
+version: 2.12.0
 appVersion: 0.34.1
 home: https://github.com/kubernetes/ingress-nginx
 description: Ingress controller for Kubernetes using NGINX as a reverse proxy and load balancer

charts/ingress-nginx/templates/controller-servicemonitor.yaml

@@ -19,12 +19,21 @@ spec:
     {{- if .Values.controller.metrics.serviceMonitor.honorLabels }}
       honorLabels: true
     {{- end }}
+    {{- if .Values.controller.metrics.serviceMonitor.metricRelabelings }}
+      metricRelabelings: {{ toYaml .Values.controller.metrics.serviceMonitor.metricRelabelings | nindent 8 }}
+    {{- end }}
 {{- if .Values.controller.metrics.serviceMonitor.namespaceSelector }}
   namespaceSelector: {{ toYaml .Values.controller.metrics.serviceMonitor.namespaceSelector | nindent 4 }}
 {{ else }}
   namespaceSelector:
     matchNames:
       - {{ .Release.Namespace }}
+{{- end }}
+{{- if .Values.controller.metrics.serviceMonitor.targetLabels }}
+  targetLabels:
+  {{- range .Values.controller.metrics.serviceMonitor.targetLabels }}
+    - {{ . }}
+  {{- end }}
 {{- end }}
   selector:
     matchLabels:

charts/ingress-nginx/values.yaml

@@ -426,6 +426,8 @@ controller:
       #   any: true
       scrapeInterval: 30s
       # honorLabels: true
+      targetLabels: []
+      metricRelabelings: []
 
     prometheusRule:
       enabled: false