Let's go back to the previous chapter for a moment. There I have already described in detail the structure of a Spring Boot project. Configuration should be provided in YAML or a properties file with the application or the application-{profile} name. In contrast to a standard Spring Boot application, Spring Cloud is based on the configuration taken from a remote server. However, minimal settings are needed inside the application; for example, its name and config server address. That's why a Spring Cloud application creates a bootstrap context, which is responsible for loading properties from the external sources. Bootstrap properties are added with the highest priority and they cannot be overridden by local configuration. Bootstrap context, which is a parent for the main application context, uses bootstrap.yml instead of application.yml. Usually, we put the application name and Spring Cloud Config settings, as follows:
spring:
application:
name: person-service...
