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Exporting OpenTelemetry Data

Cloudflare Workers supports exporting OpenTelemetry (OTel)-compliant telemetry data to any compatible destination, allowing you to integrate with your existing monitoring and observability stack.

Supported telemetry types

You can export the following types of telemetry data:

  • Traces - Traces showing request flows through your Worker and connected services
  • Logs - Application logs including console.log() output and system-generated logs
  • Metrics - Performance metrics and custom measurements (not yet supported - coming soon)

Supported destinations

Cloudflare Workers can export data to any platform that supports the OpenTelemetry Protocol (OTLP), including:

  • Datadog
  • Honeycomb
  • Grafana Cloud
  • Sentry
  • Custom OTLP endpoints

Setting up OpenTelemetry-compatible destinations

Before you can export telemetry data, you need to create and configure a destination in the Cloudflare dashboard.

Creating a destination

  1. Head to your account's Workers Observability section of the dashboard and add a new destination.
  2. Configure your destination:
    • Destination Name - A descriptive name (e.g., "Datadog APM", "Honeycomb Logs")
    • Destination Type - Choose between "Traces" or "Logs"
    • OTLP Endpoint - The URL where your observability platform accepts OTLP data. This endpoint should end in /logs or /traces`
    • Custom Headers (Optional) - Add any authentication headers or other required headers

Enabling OpenTelemetry export for your Worker

After setting up destinations in the dashboard, configure your Worker to export telemetry data by updating your wrangler.jsonc configuration.

wrangler.jsonc
{
  "observability": {
    "traces": {
      "enabled": true,
      "destinations": ["honeycomb-apm", "datadog-apm"],
      "head_sample_rate": 0.05
    },


    "logs": {
      "enabled": true,
      "destinations": ["datadog-logs", "honeycomb-logs"],
      "head_sample_rate": 0.5
    }
  }
}

Then redeploy your Worker for new configurations to take effect.

Configuration options

  • enabled - Enable or disable telemetry collection
  • head_sample_rate - Percentage of requests to sample (0.0 to 1.0)
  • destinations - Array of destination names to export data to. These should be from the destination names created in the dashboard. Include "cloudflare" in this array to also send traces and logs to the Workers Dashboard.