This chapter will explore the need for API Manager in distributed systems, set up the KONG open source API Manager, configure the API endpoints built in the previous chapters in KONG API Manager, introduce you to Swagger for API standards, and end by demonstrating rate limiting and logging using KONG.

In the previous chapters, we learned about the container architecture and its advantages and challenges. We also created Docker containers and deployed the Account and Customer microservices on the Docker containers. Now we will discuss API management and the tools used for it, such as Swagger and KONG. I will use an example of the microservices system using Spring, Spring Boot, and Spring Cloud.

By the end of this chapter, you will have a better understanding of KONG and Swagger, and how to use these tools to manage and document the REST API.

This chapter will cover the following points:

• API Management
• Rate limiting
• KONG
• Swagger

Let's look at these topics in detail.