prometheus/documentation/examples/prometheus-kubernetes.yml

# A scrape configuration for running prometheus in cluster on kubernetes. It
# will create endpoints for node and master roles, as well as any service
# which is annotated with `prometheus_io_scrape=true`

scrape_configs:
- job_name: 'kubernetes'

  kubernetes_sd_configs:
  - masters:
    - 'https://kubernetes.default.svc'
    in_cluster: true
    tls_config:
      ca_file: /var/run/secrets/kubernetes.io/serviceaccount/ca.crt
    bearer_token_file: /var/run/secrets/kubernetes.io/serviceaccount/token

  relabel_configs:
  - source_labels: [__meta_kubernetes_role, __meta_kubernetes_service_annotation_prometheus_io_scrape]
    action: keep
    regex: ^(?:(?:master|node);.*|.*;true)$
  - source_labels: [__meta_kubernetes_service_annotation_prometheus_io_scheme]
    action: replace
    target_label: __scheme__
    regex: ^(https?)$
    replacement: $1
  - source_labels: [__meta_kubernetes_service_annotation_prometheus_io_path]
    action: replace
    target_label: __metrics_path__
    regex: ^(.+)$
    replacement: $1
  - source_labels: [__address__, __meta_kubernetes_service_annotation_prometheus_io_port]
    action: replace
    target_label: __address__
    regex: ^(.+)(?::\d+);(\d+)$
    replacement: $1:$2