22.2. Environment variables for tracing

Use environment variables when you are enabling tracing for Kafka components or initializing a tracer for Kafka clients.

Tracing environment variables are subject to change. For the latest information, see the OpenTelemetry documentation.

The following tables describe the key environment variables for setting up a tracer.

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表 22.1. OpenTelemetry environment variables
Property	Required	Description
`OTEL_SERVICE_NAME`	Yes	The name of the Jaeger tracing service for OpenTelemetry.
`OTEL_EXPORTER_JAEGER_ENDPOINT`	Yes	The exporter used for tracing.
`OTEL_TRACES_EXPORTER`	Yes	The exporter used for tracing. Set to `otlp` by default. If using Jaeger tracing, you need to set this environment variable as `jaeger`. If you are using another tracing implementation, specify the exporter used.