opentelemetry-instrumentation-oslo-messaging 0.4.0

OpenStack oslo.messaging instrumentation for OpenTelemetry

OpenTelemetry oslo.messaging Instrumentation

OpenStack oslo.messaging instrumentation for OpenTelemetry.

It patches two thin layers to produce end-to-end producer → consumer traces.

Producer — context injection. Transport._send and Transport._send_notification inject the current W3C trace context into the message's on-the-wire context dictionary:

• This runs after the serializer, so it is serializer-agnostic — it works with any Serializer (including production's RequestContextSerializer, whose to_dict() would otherwise drop unknown keys).
• It is a single chokepoint covering every send path: RPC calls, casts, fanout, replies, and notifications.
• No producer span is created; the trace linkage rides on whatever span is already active in the caller (e.g. the WSGI request span).

Consumer — spans. The dispatchers open CONSUMER spans parented to the producer, extracting context from the incoming message:

• RPCDispatcher.dispatch → a CONSUMER span oslo.messaging.rpc.process
• NotificationDispatcher.dispatch → a CONSUMER span oslo.messaging.notification.process

The span is scoped to the dispatch call, so the remote context is never attached beyond message handling. Message payloads are never recorded as span attributes. The batch notification dispatcher is not instrumented.

Usage

from opentelemetry.instrumentation.oslo_messaging import (
    OsloMessagingInstrumentor,
)

OsloMessagingInstrumentor().instrument()