Mastering Distributed Tracing

Exercise 4 – tracing RPC requests

I promised at the beginning of this chapter to make this application interesting. So far, it was just a single process and not particularly exciting as a testbed for distributed tracing. In this exercise, we will turn the Hello application from a monolith into a microservices-based application. While doing that, we will learn how to:

• Trace a transaction across more than one microservice
• Pass the context between processes using inject and extract trace points
• Apply OpenTracing-recommended tags

Step 1 – break up the monolith

Our main application internally performs two primary functions: retrieving a person's information from the database and formatting it into a greeting. We can extract these two functions into their ...