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spring cloud alibaba gateway  nacos  503错误代码

 2 years ago
source link: https://blog.51cto.com/u_14622073/5252576
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spring cloud alibaba gateway  nacos  503错误代码

原创

fhspringcloud 2022-04-25 10:53:19 ©著作权

文章标签 spring 客户端 服务端 文章分类 Java 编程语言 阅读数143

POM文件依赖

<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>

<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-gateway</artifactId>
<version>3.0.2</version>
</dependency>

<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>

我在父组件中加入的nacos的相关依赖如下：

<dependency>
<groupId>com.alibaba.cloud</groupId>
<artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
<version>${nacos.version}</version>
</dependency>
<dependency>
<groupId>com.alibaba.cloud</groupId>
<artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
<version>${nacos.version}</version>
</dependency>

nacos的版本如下：

<properties>
<nacos.version>2021.1</nacos.version>
</properties>

gateway的application.yml文件配置如下：

server:
port: 9040

spring:
application:
name: gateway
cloud:
gateway:
routes:
- id: consumer
uri: lb://consumer
# uri: http://localhost:9010
predicates:
- Path=/**
nacos:
discovery:
server-addr: localhost:8848
metadata:
preserved.heart.beat.interval: 3 #心跳间隔。时间单位:秒。心跳间隔
preserved.heart.beat.timeout: 6 #心跳暂停。时间单位:秒。 即服务端6秒收不到客户端心跳，会将该客户端注册的实例设为不健康：
preserved.ip.delete.timeout: 9 #Ip删除超时。时间单位:秒。即服务端9秒收不到客户端心跳，会将该客户端注册的实例删除：

当我通过uri: localhost:9010去调用服务时，是可以调用的，但是当我用uri lb://consumer时就无法调用服务，报错503.

解决办法是：（实例项目fhadmin.cn）

加入feign依赖。

<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>

<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-gateway</artifactId>
<version>3.0.2</version>
</dependency>

<!--fegin组件-->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-openfeign</artifactId>
<version>3.0.2</version>
</dependency>
<!-- Feign Client for loadBalancing -->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-loadbalancer</artifactId>
<version>3.0.2</version>
</dependency>

<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>

猜测原因：nacos兼容feign，feign集成ribbon，默认实现负载均衡；或许是nacos不兼容springcloud gateway自带的ribbon。

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