zookeeper代替eureka与springcloud整合

发布时间:2023-07-01 08:30

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
zookeeper代替eureka与springcloud整合_第1张图片
1、支付服务注册进zookeeper
1.1 创建module cloud-provider-payment8004zookeeper代替eureka与springcloud整合_第2张图片
1.2 引入zookeeper依赖,代替eureka

<?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

#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

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

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
zookeeper代替eureka与springcloud整合_第3张图片
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。
zookeeper代替eureka与springcloud整合_第4张图片
zookeeper代替eureka与springcloud整合_第5张图片
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

<!--springboot整合zookeeper客户端-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-zookeeper-discovery</artifactId>
            <!--先排除自带的zookeeper3.5.3-->
            <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>
        </dependency>

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

<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>

zookeeper代替eureka与springcloud整合_第6张图片
这样,微服务提供者 支付模块就入驻进zookeeper服务器

1.7 验证测试
zookeeper代替eureka与springcloud整合_第7张图片
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。

继续深挖测试:zookeeper代替eureka与springcloud整合_第8张图片
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
zookeeper代替eureka与springcloud整合_第9张图片
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zookeeper代替eureka与springcloud整合_第10张图片
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。
zookeeper代替eureka与springcloud整合_第11张图片
这与zookeeper的实现——监听机制有关,具另一篇博客有介绍:
https://blog.csdn.net/qq_41211642/article/details/104806959
2.订单服务注册进zookeeper
2.1 创建module cloud-consumerzk-order80
zookeeper代替eureka与springcloud整合_第12张图片
2.2 pom.xml

<?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>

2.3 application.yml

server:
  port: 80
spring:
  application:
    name: cloud-consumer-order
  cloud:
    #注册到zookeeper地址
    zookeeper:
      connect-string: 192.168.88.131:2181

2.4 主启动

package com.atguigu.springcloud;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
@SpringBootApplication
@EnableDiscoveryClient
public class OrderZKMain80 {

    public static void main(String[] args) {
        SpringApplication.run(OrderZKMain80.class,args);
    }
}

2.5 业务类

//没讲ribbon前使用RestTemplate完成
package com.atguigu.springcloud.config;
import org.springframework.cloud.client.loadbalancer.LoadBalanced;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.client.RestTemplate;

@Configuration
public class ApplicationContextConfig {
    @Bean
    @LoadBalanced
    public RestTemplate getRestTemplate(){
        return new RestTemplate();
    }
}

80服务controller代码:

package com.atguigu.springcloud.controller;
 
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;
 
import javax.annotation.Resource;
 
@RestController
@Slf4j
public class OrderZKController {
    public static final  String INVOKE_URL="http://cloud-provider-payment";
 
    @Resource
    private RestTemplate restTemplate;
 
    @GetMapping(value = "consumer/payment/zk")
    public String paymentInfo()
    {
        String result =restTemplate.getForObject(INVOKE_URL+"/payment/zk",String.class);
        return result;
    }
}

2.6 启动80 测试
zookeeper代替eureka与springcloud整合_第13张图片
订单服务也注册进zookeeper服务器,执行以下功能
zookeeper代替eureka与springcloud整合_第14张图片
则80调用8004成功。

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