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eureka迁移到nacos--双服务中心注册

eureka迁移到nacos--双服务中心注册

作者: Java_Explorer | 来源:发表于2023-08-29 13:37 被阅读0次

    服务注册中心的迁移有多种方式,官网使用nacos sync,还有民间开发的双注册中心组件eureka-nacos-proxy,但是我用了不太顺利,所以用的是阿里巴巴的双注册中心组件edas-sc-migration-starter

    spring boot:2.5.3

    1. 引入依赖
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-actuator</artifactId>
    </dependency>
    <dependency>
        <groupId>com.alibaba.cloud</groupId>
        <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        <version>2.0.4.RELEASE</version>
    </dependency>
    <!-- https://mvnrepository.com/artifact/com.alibaba.cloud/spring-cloud-starter-alibaba-nacos-config -->
    <dependency>
        <groupId>com.alibaba.cloud</groupId>
        <artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
        <version>2.0.4.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>com.alibaba.edas</groupId>
        <artifactId>edas-sc-migration-starter</artifactId>
        <version>1.0.2</version>
    </dependency>
    
    1. 正常启动即可发现两边都已经注册

    2. 如果要用open feign,需要在启动类排除ribbon自动配置,否则服务间调用会报错

    2021-08-18 16:00:58.368 ERROR 351892 --- [nio-8081-exec-1] o.a.c.c.C.[.[.[/].[dispatcherServlet]    : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Handler dispatch failed; nested exception is java.lang.AbstractMethodError: org.springframework.cloud.netflix.ribbon.RibbonLoadBalancerClient.choose(Ljava/lang/String;Lorg/springframework/cloud/client/loadbalancer/Request;)Lorg/springframework/cloud/client/ServiceInstance;] with root cause
    
    java.lang.AbstractMethodError: org.springframework.cloud.netflix.ribbon.RibbonLoadBalancerClient.choose(Ljava/lang/String;Lorg/springframework/cloud/client/loadbalancer/Request;)Lorg/springframework/cloud/client/ServiceInstance;
        at org.springframework.cloud.openfeign.loadbalancer.FeignBlockingLoadBalancerClient.execute(FeignBlockingLoadBalancerClient.java:88) ~[spring-cloud-openfeign-core-3.0.3.jar:3.0.3]
    

    点进去可以看到 应该是负载均衡时选择服务出现错误

    解决方案1. 在启动类屏蔽ribbon自动配置类

    此时feign会默认调用nacos的服务

    方案2. 阿里云官网看的,但是我试了会报另一个错误,所以就采用方案1

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