fix(helm,podmonitor): add podMonitorSelector for gateway metrics configuration (#3022)

helm/core/templates/podmonitor.yaml

@@ -5,6 +5,9 @@ metadata:
   namespace: {{ .Release.Namespace }}
   labels:
     {{- include "gateway.labels" . | nindent 4}}
+    {{- with .Values.gateway.metrics.podMonitorSelector }}
+    {{- toYaml . | nindent 4 }}
+    {{- end }}
   annotations:
     {{- .Values.gateway.annotations | toYaml | nindent 4 }}
 spec:

helm/core/values.yaml

@@ -530,6 +530,11 @@ gateway:
   metrics:
     # -- If true, create PodMonitor or VMPodScrape for gateway
     enabled: false
+    # -- Selector for PodMonitor
+    # When using monitoring.coreos.com/v1.PodMonitor, the selector must match
+    # the label "release: kube-prome" is the default for kube-prometheus-stack
+    podMonitorSelector:
+      release: kube-prome
     # -- provider group name for CustomResourceDefinition, can be monitoring.coreos.com or operator.victoriametrics.com
     provider: monitoring.coreos.com
     interval: ""