Templatize ServiceMonitor

[patila-hpe]

Is your feature request related to a problem? Please describe.

There's no provision to set custom values for Service Monitor when enabled. Looking at fluentbit-servicemonitor.yaml, the template is barebones without any placeholders to accept custom values for endpoints, selectors, labels etc.

metadata:
  name: fluent-bit
  labels:
    app.kubernetes.io/name: fluent-bit
spec:
  endpoints:
    - port: metrics
      path: /api/v2/metrics/prometheus
      interval: 30s
  selector:
    matchLabels:
      app.kubernetes.io/name: fluent-bit

We cannot specify namespace on resource and selectors, there's no ability to specify additional labels.

Describe the solution you'd like

This can be parameterized to accept custom values.

fluentbit-servicemonitor.yaml

{{- if .Values.Kubernetes -}}
{{- if .Values.fluentbit.enable -}}
{{- if .Values.fluentbit.serviceMonitor.enable -}}
apiVersion: monitoring.coreos.com/v1
kind: ServiceMonitor
metadata:
  name: fluent-bit
  labels:
    app.kubernetes.io/name: fluent-bit
  namespace: {{ template "fluent-operator.namespace" . }}
spec:
  endpoints:
    - port: metrics
      path: {{ .Values.fluentbit.serviceMonitor.path }} 
      interval: {{ .Values.fluentbit.serviceMonitor.interval }}
      {{- if .Values.fluentbit.serviceMonitor.secure }}
      scheme: https
      tlsConfig:
        {{- toYaml .Values.fluentbit.serviceMonitor.tlsConfig }}
      {{- end }}
      scrapeTimeout: {{ .Values.fluentbit.serviceMonitor.scrapeTimeout }}
      {{- with .Values.fluentbit.serviceMonitor.relabelings }}
      relabelings:
        {{- toYaml . | nindent 6 }}
      {{- end }}
      {{- with .Values.fluentbit.serviceMonitor.metricRelabelings }}
      metricRelabelings:
        {{- toYaml . | nindent 6 }}
      {{- end }}
  selector:
    matchLabels:
      {{- include "fluent-operator.selectorLabels" . | nindent 6 }}
      {{- with .Values.fluentbit.labels }}
      {{- toYaml .Values.fluentbit.labels | nindent 6}}
      {{- end }}
  namespaceSelector:
    matchNames:
    - {{ template "fluent-operator.namespace" . }} 
{{- end }}
{{- end }}
{{- end }}

and modify default values.yaml -

fluentbit:
  # Installs a sub chart carrying the CRDs for the fluent-bit controller. The sub chart is enabled by default.
  crdsEnable: true
  enable: true
  serviceMonitor: 
    enable: false
    interval: 30s
    path: /api/v2/metrics/prometheus
    scrapeTimeout: 10s
    secure: false
    tlsConfig: {}
    relabelings: []
    metricRelabelings: []

Additional context

No response