問題描述

config

spring:cloud:gateway:routes:- id: myRouteuri: lb://servicepredicates:- Path=/service/**

dependencyManagement

<dependencyManagement><dependencies><!--Spring Boot--><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-dependencies</artifactId><version>${spring.boot.version}</version><type>pom</type><scope>import</scope></dependency><!--Spring Cloud--><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-dependencies</artifactId><version>${spring.cloud.version}</version><type>pom</type><scope>import</scope></dependency><!--Spring Cloud Alibaba--><dependency><groupId>com.alibaba.cloud</groupId><artifactId>spring-cloud-alibaba-dependencies</artifactId><version>2021.1</version><type>pom</type><scope>import</scope></dependency><!--Alibaba Aliyun--><dependency><groupId>com.alibaba.cloud</groupId><artifactId>aliyun-spring-boot-dependencies</artifactId><version>1.0.0</version><type>pom</type><scope>import</scope></dependency></dependencies></dependencyManagement>

問題分析

spring-cloud-starter-gateway不再依賴默認的LoadBalancer，需要引入spring-cloud-starter-loadbalancer，并且無法解析http服務名稱，例如：http://servicename,也無法訪問。

- id: useruri: http://userpredicates:- Path=/user/**filters:- StripPrefix=1

解決方案

<dependencies><dependency><groupId>com.alibaba.cloud</groupId><artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId></dependency><dependency><groupId>com.alibaba.cloud</groupId><artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId></dependency><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-bootstrap</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></dependencies>

參考文章

• springcloud 2020 gateway 503 錯誤代碼
• springcloud2020版本gateway+nacos，服務報錯503 Service Unavailable

總結

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