When you have your own RESTful API, you will start to think about how to run each service independently and control them inside their own medium. Microservices is a hot topic nowadays and we will start from the definition of what a microservice is and is not. Then, we will continue on to the isolation of APIs within the environment so that they can run autonomously. We will also explore the possibilities for splitting an existing API into a smaller, more scalable microservice. 

The following topics will be covered in this chapter:

• What are microservices?
• Isolation and resilience
• Scalability
• API Portal