Receives metric data in Prometheus format. See the Design for additional information on this receiver.

Note: This component is currently work in progress. It has several limitations and please don't use it if the following limitations is a concern:

• Collector cannot auto-scale the scraping yet when multiple replicas of the collector is run.
• When running multiple replicas of the collector with the same config, it will scrape the targets multiple times.
• Users need to configure each replica with different scraping configuration if they want to manually shard the scraping.
• The Prometheus receiver is a stateful component.

The Prometheus receiver is meant to minimally be a drop-in replacement for Prometheus. However, there are advanced features of Prometheus that we don't support and thus explicitly will return an error for if the receiver's configuration YAML/code contains any of the following

• alert_config.alertmanagers
• alert_config.relabel_configs
• remote_read
• remote_write
• rule_files

This receiver is a drop-in replacement for getting Prometheus to scrape your services. It supports the full set of Prometheus configuration in scrape_config, including service discovery. Just like you would write in a YAML configuration file before starting Prometheus, such as with:

Note: Since the collector configuration supports env variable substitution $ characters in your prometheus configuration are interpreted as environment variables. If you want to use $ characters in your prometheus configuration, you must escape them using $$.

prometheus --config.file=prom.yaml

Feature gates:

• receiver.prometheusreceiver.UseCreatedMetric: Start time for Summary, Histogram and Sum metrics can be retrieved from _created metrics. Currently, this behaviour is disabled by default. To enable it, use the following feature gate option:

"--feature-gates=receiver.prometheusreceiver.UseCreatedMetric"

You can copy and paste that same configuration under:

receivers:
  prometheus:
    config:

For example:

receivers:
    prometheus:
      config:
        scrape_configs:
          - job_name: 'otel-collector'
            scrape_interval: 5s
            static_configs:
              - targets: ['0.0.0.0:8888']
          - job_name: k8s
            kubernetes_sd_configs:
            - role: pod
            relabel_configs:
            - source_labels: [__meta_kubernetes_pod_annotation_prometheus_io_scrape]
              regex: "true"
              action: keep
            metric_relabel_configs:
            - source_labels: [__name__]
              regex: "(request_duration_seconds.*|response_duration_seconds.*)"
              action: keep

Additional to this static job definitions this receiver allows to query a list of jobs from the OpenTelemetryOperators TargetAllocator or a compatible endpoint.

receivers:
  prometheus:
    target_allocator:
      endpoint: http:https://my-targetallocator-service
      interval: 30s
      collector_id: collector-1

This receiver accepts exemplars coming in Prometheus format and converts it to OTLP format.

1. Value is expected to be received in float64 format
2. Timestamp is expected to be received in ms
3. Labels with key span_id in prometheus exemplars are set as OTLP span id and labels with key trace_id are set as trace id
4. Rest of the labels are copied as it is to OTLP format