Trying out distributed tracing

With the necessary changes to the source code in place, we can try out distributed tracing! We will do this by performing the following steps:

1. Build, start, and verify the system landscape with RabbitMQ as the queue manager.
2. Send a successful API request and see what trace information we can find in Zipkin related to this API request.
3. Send an unsuccessful API request and see what the trace information in Zipkin looks like.
4. Send a successful API request that triggers asynchronous processing and see how its trace information is represented in Zipkin.
5. Investigate how we can monitor trace information that's passed to Zipkin in RabbitMQ.
6. Switch the queue manager to Kafka and repeat the preceding steps.

We will discuss these steps in detail in the upcoming sections.

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