SpringCloud version: 3.0.2

刪除spring-cloud-starter-netflix-ribbon依賴

spring-cloud-starter-netflix-eureka-client 3.0版本的已經內置ribbon，再導入的spring-cloud-starter-netflix-ribbon可能會產生沖突

RestTemplate的Bean加入@LoadBalanced注解

@Bean
@LoadBalanced
public RestTemplate restTemplate() {
  return new RestTemplate();
}

消費者的配置文件中沒有加入注冊中心的地址

eureka:
  client:
    service-url:
      defaultZone: http://localhost:8888/eureka/
    fetch-registry: true
server:
  port: 8881
spring:
  application:
    name: service-ribbon

pom.xml添加ribbon-eureka依賴

<dependency>
  <groupId>com.netflix.ribbon</groupId>
  <artifactId>ribbon-eureka</artifactId>
  <version>2.7.18</version>
</dependency>