The OpenTelemetry Collector, when configured with a Prometheus receiver, provides an integration with ExternalDNS to scrape Prometheus metrics. The Collector uses the Prometheus receiver to fetch metrics from the ExternalDNS endpoint. From there, the metrics are processed and exported to Lightstep Observability.

To complete the integration, perform the following steps:

  • Configure ExternalDNS
  • Configure the Collector to use the ExternalDNS endpoint as a scrape target for the Prometheus receiver
  • Enable the integration by adding it to a pipeline

Prerequisites

  • ExternalDNS running in a Kubernetes environment.
  • You’ve configured the Collector to export metric data to Lightstep Observability.

Configure ExternalDNS reporting

ExternalDNS exposes metrics using a Prometheus HTTP endpoint by default. See the ExternalDNS example for an integration inside a Kubernetes cluster.

Configure the Collector receiver

In the Collector configuration file, specify ExternalDNS Prometheus endpoint as a scrape target.

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receivers:
  prometheus:
    config:
      scrape_configs:
        - job_name: otel-external-dns
          static_configs:
            - targets: [external-dns:7979]

The OpenTelemetry repository readme provides additional details about Prometheus receiver configuration.

Complete information about the Prometheus scrape configuration can be found in the Prometheus documentation.

Enable the Collector receiver

After the ExternalDNS receiver is configured, enable it by adding it to one or more pipelines as described in the Collector configuration documentation.

Validate metrics are reporting to Lightstep

You can validate that the metrics are reporting to Lightstep from the Metric details section of the Project Settings page.

  1. Open the Project settings page and scroll to the Metric details section.

  2. Search for ExternalDNS metric names. Search for metric

    See the ExternalDNS documentation for a complete list of emitted metrics.

  3. If needed, select the metric to edit the description and how the units are displayed in Lightstep.

Create a dashboard for the metrics

Use the Lightstep Terraform Provider to create a dashboard for the metrics.

Additional resources

  • For a complete example that’s ready to run, see the ExternalDNS integration in Lightstep OpenTelemetry Examples.