Hands-On Enterprise Application Development with Python

Distributed tracing

Inside the microservices world, the requests may travel from one service to another before a final response is generated. Even our simple example of a todo list management application shows this behavior, where the todo manager service frequently makes a request to the user service to implement user authentication, and to gather the details about the user, thus creating a new todo list.

The distributed tracing system aims to enable the tracing of the requests while they travel from one microservice to another.

To achieve this, the tracing systems utilize a number of mechanisms, the easiest of which is to embed a unique tracing key into the HTTP headers of every request that is being made. The tracing system is then able ...