最近做spring cloud中的gateway组件与nacos的整合测试，application.yml的配置如下：

server:
  port: 8222 #服务端口
spring:
  application:
    name: service-gateway #服务名
  cloud:
    nacos:
      discovery:
        server-addr: 127.0.0.1:8848 #nacos服务地址
    gateway:
      discovery:
        locator:
          enabled: true #使用服务发现路由
      routes:
      - id: service-edu #路由的id
        uri: lb://service-edu #服务名
        predicates:
        - Path=/eduservice/** #路由的匹配路径

浏览器访问http://localhost:8222/eduservice/teacher/findAll，结果报503错误，nacos里面也有相应的服务，后来到网上查了发现是因为少了一个依赖

<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-loadbalancer</artifactId>
</dependency>

添加了依赖以后，重启服务，测试成功
完整的依赖如下

<dependency>
    <groupId>com.alibaba.cloud</groupId>
    <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
</dependency>
<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-openfeign</artifactId>
</dependency>
<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-loadbalancer</artifactId>
</dependency>
<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-gateway</artifactId>
</dependency>