ray.serve.get_trace_context

ray.serve.get_trace_context() → Dict[str, str] | None

Get the current OpenTelemetry trace context.

This can be used inside a deployment to create child spans that are linked to the Serve request trace. Requires tracing to be enabled via the RAY_SERVE_TRACING_EXPORTER_IMPORT_PATH environment variable.

Returns:

The current OpenTelemetry context, or None if tracing is not enabled.

Example:

from opentelemetry import trace
from ray import serve

tracer = trace.get_tracer(__name__)

@serve.deployment
class MyDeployment:
    def __call__(self, request):
        with tracer.start_as_current_span(
            "my_span", context=serve.get_trace_context()
        ):
            ...

PublicAPI (alpha): This API is in alpha and may change before becoming stable.