prometheus.yml

  - job_name: 'envoy'
    consul_sd_configs:
     - server: 'consul:8500'
    metrics_path: '/stats'
    params:
      format: ['prometheus']
    relabel_configs:
    - source_labels: ['__meta_consul_tags']
      regex: '.*,has_envoy,.*' # We tag service instances that have envoy with the tag "has_envoy" in Consul
      action: 'keep'
    - source_labels: ['__meta_consul_service']
      regex: '(.+)'
      replacement: '${1}'
      target_label: 'local_cluster' # Label to identify the type of service of the target host
    - source_labels: ['__meta_consul_service_port']
      regex: '.*'
      replacement: '9901'
      target_label: '__meta_consul_service_port' # Poll the port of the Envoy admin interface, not the service.
    - source_labels: ['__address__']
      regex: '(.*):.*'
      replacement: '$1:9901'
      target_label: '__address__' # Poll the port of the Envoy admin interface, not the service.
    - source_labels: ['__meta_consul_node']
      regex: '(.+)'
      target_label: 'instance' # Overwrite instance to not have the port number in it
      replacement: '$1'
    metric_relabel_configs: # We don't like the envoy_ prefixes on label names, they're unnecessary. So strip them.
    - action: 'labelmap'
      regex: 'envoy_(.*)'
      replacement: '$1'
    - action: 'labeldrop'
      regex: 'envoy_(.*)'
  - job_name: 'envoy_statsd' # Histograms have to come from statsd still. Config is basically the same as above but with port 9102 instead of 9901.
    consul_sd_configs:
     - server: 'consul:8500'
    relabel_configs:
    - source_labels: ['__meta_consul_tags']
      regex: '.*,has_envoy,.*'
      action: 'keep'
    - source_labels: ['__meta_consul_service']
      regex: '(.+)'
      replacement: '${1}'
      target_label: 'local_cluster'
    - source_labels: ['__meta_consul_service_port']
      regex: '.*'
      replacement: '9102'
      target_label: '__meta_consul_service_port'
    - source_labels: ['__address__']
      regex: '(.*):.*'
      replacement: '$1:9102'
      target_label: '__address__'
    - source_labels: ['__meta_consul_node']
      regex: '(.+)'
      target_label: 'instance'
      replacement: '$1'