protected boolean isAws(InstanceInfo selfInstanceInfo) {
		boolean result = DataCenterInfo.Name.Amazon == selfInstanceInfo.getDataCenterInfo().getName();
		log.info("isAws returned " + result);
		return result;
	}
Users can override to clean up the environment themselves.
@throws Exception - shutting down Eureka servers may result in an exception
spring-cloud-netflix-eureka-server/src/main/java/org/springframework/cloud/netflix/eureka/server/EurekaServerBootstrap.java