prometheus.yml中定义了keep, drop, update等状态

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- job_name: 'kubernetes-service-endpoints'

  tls_config:
    ca_file: /var/run/secrets/kubernetes.io/serviceaccount/ca.crt
    # TODO: this should be per target
    insecure_skip_verify: true

  kubernetes_sd_configs:
  - role: endpoints

  relabel_configs:
    # only scrape infrastructure components
    - source_labels: [__meta_kubernetes_namespace]
      action: keep
      regex: 'default|logging|metrics|kube-.+|openshift|openshift-.+'
    # drop infrastructure components managed by other scrape targets
    - source_labels: [__meta_kubernetes_service_name]
      action: drop
      regex: 'prometheus-node-exporter'
    # only those that have requested scraping
    - source_labels: [__meta_kubernetes_service_annotation_prometheus_io_scrape]
      action: keep
      regex: true
    - source_labels: [__meta_kubernetes_service_annotation_prometheus_io_scheme]
      action: replace
      target_label: __scheme__
      regex: (https?)
    - source_labels: [__meta_kubernetes_service_annotation_prometheus_io_path]
      action: replace
      target_label: __metrics_path__
      regex: (.+)
    - source_labels: [__address__, __meta_kubernetes_service_annotation_prometheus_io_port]
      action: replace
      target_label: __address__
      regex: (.+)(?::\d+);(\d+)
      replacement: $1:$2
    - action: labelmap
      regex: __meta_kubernetes_service_label_(.+)
    - source_labels: [__meta_kubernetes_namespace]
      action: replace
      target_label: kubernetes_namespace
    - source_labels: [__meta_kubernetes_service_name]
      action: replace
      target_label: kubernetes_name

创建自定义的Service，添加指定的annotationsprometheus.io/scrape: "true",prometheus.io/port: "9128"

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apiVersion: v1
kind: Service
metadata:
  name: ceph-monitor
  annotations:
    prometheus.io/scrape: "true"
    prometheus.io/port: "9128"
spec:
  ports:
    - port: 9128
      name: ceph-monitor
      protocol: TCP
      targetPort: 9128
  type: ClusterIP

---
kind: Endpoints
apiVersion: v1
metadata:
  name: ceph-monitor
subsets:
  - addresses:
      - ip: 99.248.82.31
    ports:
      - port: 9128
        name: ceph-monitor