So far, we have briefly reviewed a number of different application models (monolith, SOAP, and the new microservices architecture) and we have defined microservices as the minimum piece of software with functionality that we can build as a component for an application.
With this definition, we will associate a microservice with a process. This is the most common way of running microservices. A process with full functionality can be described as a microservice.
An application is composed of microservices, and hence processes, as expected. The interaction between them will usually be made using HTTP/HTTPS/API REST.
This is, of course, a definition, but we recommend this approach to ensure proper microservice health management.
