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[资源分享]     spring cloud 2020 gateway 报错503

  • By - 楼主

  • 2021-09-08 14:01:44
  • POM文件依赖

    <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter</artifactId> </dependency> <!--gateway fhadmin.org--> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-gateway</artifactId> <version>3.0.2</version> </dependency> <!--spring-boot fhadmin.org--> <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>${nacos.version}</version> </dependency> <!--alibaba fhadmin.org--> <dependency> <groupId>com.alibaba.cloud</groupId> <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId> <version>${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:

    #fhadmin.org
    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: http://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:
    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 fhadmin.cn--> <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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