Using OpenTelemetry Collector to collect traces

How to use Dapr to push trace events through the OpenTelemetry Collector.

Dapr directly writes traces using the OpenTelemetry (OTLP) protocol as the recommended method. For observability tools that support the OTLP directly, it is recommended to use the OpenTelemetry Collector, as it allows your application to quickly offload data and includes features, such as retries, batching, and encryption. For more information, read the Open Telemetry Collector documentation.

Dapr can also write traces using the Zipkin protocol. Prior to supporting the OTLP protocol, the Zipkin protocol was used with the OpenTelemetry Collector to send traces to observability tools such as AWS X-Ray, Google Cloud Operations Suite, and Azure Monitor. Both protocol approaches are valid, however the OpenTelemetry protocol is the recommended choice.

Using OpenTelemetry Collect to integrate with many backend

前期准备

Set up OTEL Collector to push to your trace backend

  1. Check out the open-telemetry-collector-generic.yaml.

  2. Replace the <your-exporter-here> section with the correct settings for your trace exporter.

  3. Apply the configuration with:

    kubectl apply -f open-telemetry-collector-generic.yaml

Set up Dapr to send traces to OTEL Collector

Set up a Dapr configuration file to turn on tracing and deploy a tracing exporter component that uses the OpenTelemetry Collector.

  1. Use this collector-config.yaml file to create your own configuration.

  2. Apply the configuration with:

    kubectl apply -f collector-config.yaml

Deploy your app with tracing

Apply the appconfig configuration by adding a dapr.io/config annotation to the container that you want to participate in the distributed tracing, as shown in the following example:

apiVersion: apps/v1
kind: Deployment
metadata:
  ...
spec:
  ...
  template:
    metadata:
      ...
      annotations:
        dapr.io/enabled: "true"
        dapr.io/app-id: "MyApp"
        dapr.io/app-port: "8080"
        dapr.io/config: "appconfig"

You can register multiple tracing exporters at the same time, and the tracing logs are forwarded to all registered exporters.

That’s it! There’s no need to include any SDKs or instrument your application code. Dapr automatically handles the distributed tracing for you.

View traces

Deploy and run some applications. Wait for the trace to propagate to your tracing backend and view them there.