Distributed Tracing with Spring Cloud Sleuth

Spring Cloud Sleuth is one of the projects under the spring cloud umbrella.

The objective of this project is to enable tracing in a distributed system and to make it easily configurable in a Spring Boot project.

Internally, Zipkin OSS is used to generate and report traces. Zipkin is an OSS that was initially developed by Twitter and is now maintained by the Zipkin community and volunteers.

Tracing becomes a challenge in distributed systems when there is no unique reference to trace a particular activity across multiple systems and services.

Spring Cloud Sleuth addresses this challenge and generates trace headers accordingly.

Each trace includes these three key information:

If one microservice calls another microservice then the trace headers will continue in the called service.

Let’s see the implementation using a SpringBoot application (and compare it with an application that doesn’t use Sleuth)

Start the application mentioned above and you will see the logs generated as given below,

Stop the application and let’s make the following changes to add cloud dependencies.

Note that, if you are using a different codebase then add a cloud version corresponding to your Spring Boot version.

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