做谷粒商城練習時P46，發(fā)現(xiàn)網(wǎng)關(guān)gateway轉(zhuǎn)發(fā)到renren-fast獲取驗證碼報503，原因是我在commom模塊里引入的nacos排除了ribbon，所以無法通過lb路由到指定微服務(wù)

      <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
            <exclusions>
                <exclusion>
                    <groupId>org.springframework.cloud</groupId>
                    <artifactId>spring-cloud-starter-netflix-ribbon</artifactId>
                </exclusion>
            </exclusions>
      </dependency>

解決方法：在gateway里引入loadbalancer依賴

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