zookeeper代替eureka与springcloud整合
注册中心 zookeeper:
- zookeeper是一个分布式协调工具,可以实现注册中心功能
- 关闭Linux服务器防火墙后启动zookeeper服务器
- zookeeper服务器取代Eureka服务器,zk作为服务注册中心
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1、支付服务注册进zookeeper
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1.1 创建module cloud-provider-payment8004
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1.2 引入zookeeper依赖,代替eureka
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<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <parent> <artifactId>cloud2020</artifactId> <groupId>com.atguigu.springcloud</groupId> <version>1.0-SNAPSHOT</version> </parent> <modelVersion>4.0.0</modelVersion> <artifactId>cloud-provider-payment8004</artifactId> <dependencies> <!--springboot整合zookeeper客户端--> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-zookeeper-discovery</artifactId> </dependency> <!--Springboot整合web组件--> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <!--引入自定义的api通用包,可以使用payment支付Entity--> <dependency> <groupId>com.atguigu.springcloud</groupId> <artifactId>cloud-api-commons</artifactId> <version>${project.version}</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-devtools</artifactId> <scope>runtime</scope> <optional>true</optional> </dependency> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <optional>true</optional> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> </dependencies> </project>
1.3 写application.yml
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#8004表示注册到zookeeper服务器的支付服务提供者端口号 server: port: 8004 #服务别名----注册zookeeper到注册中心名称 spring: application: name: cloud-provider-payment cloud: zookeeper: connect-string: 192.168.88.131:2181
1.4主启动
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package com.atguigu.springcloud; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.cloud.client.discovery.EnableDiscoveryClient; @SpringBootApplication @EnableDiscoveryClient //该注解用于想使用consul或者zookeeper作为注册中心时注册服务 public class PaymentMain8004 { public static void main(String[] args) { SpringApplication.run(PaymentMain8004.class,args); } }
1.5业务类
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package com.atguigu.springcloud.controller; import lombok.extern.slf4j.Slf4j; import org.springframework.beans.factory.annotation.Value; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.RestController; import java.util.UUID; @RestController @Slf4j public class PaymentController { @Value("${server.port}") private String serverPort; @GetMapping(value = "/payment/zk") public String paymentzk(){ return "springcloud with zookeeper:"+serverPort+"\t"+ UUID.randomUUID().toString(); } }
1.6
./zkCli.sh
启动客户端,然后启动8004注册进zookeeper -
- 会发现启动类报错了,这是环境的问题。引入zookeeper依赖自带3.5.3 beta版,而我使用的是3.4.14,版本冲突了。
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解决办法:修改pom依赖,排除3.5.3版本的,并引入3.4.14版本的
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PS: 新版本的zookeeper还会遇到slf4j和log4j包冲突的问题,此时在zookeeper去掉slf4j的依赖
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这样,微服务提供者 支付模块就入驻进zookeeper服务器
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1.7 验证测试
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java程序在windows系统,服务注册中心在centos系统,说明程序调试成功。
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继续深挖测试:
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微服务作为一个znode节点放到zookeeper服务器上,这一大串就是在zookeeper上的基本信息的json串,就能看到zookeeper上8004微服务提供者的相关信息
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zookeeper作为服务注册中心,微服务作为节点注册进来,那这个节点是临时还是持久?
关于Eureka我们知道,偶尔有一时刻服务提供者出了点故障,Eureka会开启自我保护机制,微服务不会被删除,那现在关闭8004试一下zookeeper中的服务会有什么变化吗 -
可以看出,Zookeeper也是在一定时间内,不会剔除服务,超时才剔除,所以zookeeper具备的服务节点是临时的。当你再启动8004时,zookeeper还会自动监听服务状态,但是流水号是一个新的流水号。
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2.订单服务注册进zookeeper
2.1 创建module cloud-consumerzk-order80
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2.2 pom.xml
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<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <parent> <artifactId>cloud2020</artifactId> <groupId>com.atguigu.springcloud</groupId> <version>1.0-SNAPSHOT</version> </parent> <modelVersion>4.0.0</modelVersion> <artifactId>cloud-consumerzk-order80</artifactId> <dependencies> <!--springboot整合zookeeper客户端--> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-zookeeper-discovery</artifactId> <!--排除自带的zookeeper--> <exclusions> <exclusion> <groupId>org.apache.zookeeper</groupId> <artifactId>zookeeper</artifactId> </exclusion> </exclusions> </dependency> <!--添加zookeeper3.4.14版本--> <dependency> <groupId>org.apache.zookeeper</groupId> <artifactId>zookeeper</artifactId> <version>3.4.14</version> <exclusions> <exclusion> <groupId>log4j</groupId> <artifactId>log4j</artifactId> </exclusion> <exclusion> <groupId>org.slf4j</groupId> <artifactId>slf4j-log4j12</artifactId> </exclusion> </exclusions> </dependency> <!--springboot整合web组件--> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </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> </project>
2.5 业务类
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