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Configuring the OpenTelemetry Collector metrics

The following list shows some of these metrics:

  • Collector memory usage

  • CPU utilization

  • Number of active traces and spans processed

  • Dropped spans, logs, or metrics

  • Exporter and receiver statistics

The Red Hat build of OpenTelemetry Operator automatically creates a service named <instance_name>-collector-monitoring that exposes the Collector’s internal metrics. This service listens on port 8888 by default.

You can use these metrics for monitoring the Collector’s performance, resource consumption, and other internal behaviors. You can also use a Prometheus instance or another monitoring tool to scrape these metrics from the mentioned <instance_name>-collector-monitoring service.

When the spec.observability.metrics.enableMetrics field in the OpenTelemetryCollector custom resource (CR) is set to true, the OpenTelemetryCollector CR automatically creates a Prometheus ServiceMonitor or PodMonitor CR to enable Prometheus to scrape your metrics.
Prerequisites

  • Monitoring for user-defined projects is enabled in the cluster.

Procedure

  • To enable metrics of an OpenTelemetry Collector instance, set the spec.observability.metrics.enableMetrics field to true:

    apiVersion: opentelemetry.io/v1alpha1
kind: OpenTelemetryCollector
metadata:
  name: <name>
spec:
  observability:
    metrics:
      enableMetrics: true
Verification

You can use the Administrator view of the web console to verify successful configuration:

  1. Go to Observe → Targets.

  2. Filter by Source: User.

  3. Check that the ServiceMonitors or PodMonitors in the opentelemetry-collector-<instance_name> format have the Up status.

Additional resources