Spring Cloud service discovery

The service discovery is one of the key points of the microservices architecture. The basis of the microservices architecture is to decouple the monolithic application into smaller pieces of software which have well-defined boundaries.

This impacts our system design in the monolithic application. In general, the application logic stays in a single place with regards to the code. It means the procedure or methods calls are invoked in the same context when the application is running.

When we adopt the microservices architectural style, these invocations are typically external, in other words, they will invoke the service through HTTP calls, for example, in another application context or web server.

Then, the services need to call other services through HTTP, for instance, but how do the services call the others if the instances of these services change with a considerable frequency? Remember, we are creating distributed and scalable systems, where the instances...