ExternalDNS metrics

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 Cloud 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 Cloud 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.

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 Cloud Observability

You can validate that metrics are reporting to Cloud Observability on the Metrics details page in Settings.

In Cloud Observability, click Settings > Metric details.
Search for ExternalDNS metric names.

See the ExternalDNS documentation for a complete list of emitted metrics.
If needed, select the metric to edit the description and how the units are displayed in Cloud Observability.

Create a dashboard for the metrics

Use the Cloud Observability 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 Cloud Observability OpenTelemetry Examples.