【SpringCloud】Zookeeper代替Eureka

太过爱你忘了你带给我的痛 2022-11-04 05:58 136阅读 0赞

凉凉了，Eureka 2.x 停止维护，Spring Cloud 何去何从？  
[Eureka源码地址][Eureka]  
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### Zookeeper代替Eureka ###

简单容易CentOS7 安装ZooKeeper教程地址：https://blog.csdn.net/xiangjunyes/article/details/114270903  
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Zookeeper是一个分布式协调工具，可以实现注册中心功能。  
关闭了linux服务器防火墙或启动zookeeper服务器。  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3hpYW5nanVueWVz_size_16_color_FFFFFF_t_70 2]

Zookeeper服务器取代eureka，zk作为服务注册中心。

我们现在的java程序在win10，注册中心zk在centos7，就要保证两台机器是互相ping通。  
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新建项目cloud-provider-payment8004  
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pom.xml

<dependencies>
            
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-web</artifactId>
            </dependency>
            <dependency>
                <groupId>com.atguigu.springcloud</groupId>
                <artifactId>cloud-api-commons</artifactId>
                <version>${project.version}</version>
            </dependency>
            
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-zookeeper-discovery</artifactId>
                
                <exclusions>
                    <exclusion>
                        <groupId>org.apache.zookeeper</groupId>
                        <artifactId>zookeeper</artifactId>
                    </exclusion>
                </exclusions>
            </dependency>
            
            <dependency>
                <groupId>org.apache.zookeeper</groupId>
                <artifactId>zookeeper</artifactId>
                <version>3.4.9</version>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-devtools</artifactId>
                <scope>runtime</scope>
                <optional>true</optional>
            </dependency>
            <dependency>
                <groupId>org.projectlombok</groupId>
                <artifactId>lombok</artifactId>
                <optional>true</optional>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-test</artifactId>
                <scope>test</scope>
            </dependency>
        </dependencies>

添加application.yml

server:
      port: 8004
    
    
    spring:
      application:
        name: cloud-provider-payment
      cloud:
        zookeeper: 192.168.235.128:2181

主启动类

package com.xiang.springcloud;
    
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
    
    @SpringBootApplication
    @EnableDiscoveryClient
    public class PaymentMain8004 {
        
        public static void main(String[] args) {
        
            SpringApplication.run(PaymentMain8004.class,args);
        }
    }

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启动zkCli.sh  
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现在只有zookeeper结点  
![在这里插入图片描述][20210303220707796.png]  
![在这里插入图片描述][20210303220855549.png]  
启动微服务PaymentMain8004

结果启动失败  
错误界面截图  
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这是为什么了？  
jar包版本冲突  
服务器zookeeper版本为3.6.2 java程序为3zookeeper版本为.5.2

解决办法  
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重新启动  
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### 是临时结点还是永久结点 ###

![在这里插入图片描述][20210309212240710.png]

现在停掉payment8004服务  
![在这里插入图片描述][20210309212328275.png]  
停止服务后, 在心跳结束后, zookeeper把节点删除  
重新启动后, zookeeper会产生一个该服务的新流水号  
使用cp思想, 保持数据一致性.  
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[Eureka]: https://github.com/Netflix/eureka/wiki
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