@Bean
	@ConditionalOnMissingBean
	LoadBalancerZoneConfig zoneConfig(Environment environment) {
		return new LoadBalancerZoneConfig(environment.getProperty(LOADBALANCER_ZONE));
	}
Spring Cloud LoadBalancer Zone property name.
spring-cloud-netflix-eureka-client/src/main/java/org/springframework/cloud/netflix/eureka/loadbalancer/LoadBalancerEurekaAutoConfiguration.java