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【SpringCloud】Zookeeper服务注册与发现

发布时间：2021-05-21 06:35:57 所属栏目：大数据 来源： https://www.jb51.cc
导读：Zookeeper服务注册与发现 Eureka停止更新了,你怎么办 https://github.com/Netflix/eureka/wiki SpringCloud整合Zookeeper替代Eureka 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 1.

Zookeeper服务注册与发现

Eureka停止更新了,你怎么办

https://github.com/Netflix/eureka/wiki

SpringCloud整合Zookeeper替代Eureka

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

1. linux
systemctl stop firewalld
systemctl status firewalld
 
2.windows

Zookeeper服务器取代Eureka服务器,zk作为服务注册中心

服务提供者

新建cloud-provider-payment8004

POM

<?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>
    <description>Zookeeper服务提供者</description>

    <dependencies>
        <dependency>
            <groupId>com.atguigu.springcloud</groupId>
            <artifactId>cloud-api-common</artifactId>
            <version>${project.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!--SpringBoot整合Zookeeper客户端-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-zookeeper-discovery</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</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>

YML

server:
  # 8004表示注册到zookeeper服务器的支付服务提供者端口号
  port: 8004
spring:
  application:
    # 服务别名---注册zookeeper到注册中心的名称
    name: cloud-provider-payment
  cloud:
    zookeeper:
      # 默认localhost:2181
      connect-string: localhost:2181

主启动类

@EnableDiscoveryClient

@SpringBootApplication
@EnableDiscoveryClient //该注解用于向使用consul或者zookeeper作为注册中心时注册服务
public class Payment8004 {

    public static void main(String[] args) {
        SpringApplication.run(Payment8004.class,args);
    }
}

Controller

package com.atguigu.springcloud.controller;

import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.UUID;

/**
 * @author zzyy
 * @create 2020-01-30 16:55
 **/
@RestController
@Slf4j
public class PaymentController {
    @Value("${server.port}")
    private String serverPort;

    @RequestMapping(value = "payment/zk")
    public String paymentZk() {
        return "SpringCloud with zookeeper:" + serverPort + "t" + UUID.randomUUID().toString();
    }
}

启动8004注册进zookeeper

启动zk

zkServer.sh start

启动后问题

why

如果不排除自带的3.5.3-zookeeper-beat会报jar包冲突

解决zookeeper版本jar包冲突问题

排除zk冲突后的新POM
<?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>
    <description>Zookeeper服务提供者</description>

    <dependencies>
        <dependency>
            <groupId>com.atguigu.springcloud</groupId>
            <artifactId>cloud-api-common</artifactId>
            <version>${project.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!--SpringBoot整合Zookeeper客户端-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-zookeeper-discovery</artifactId>
            <exclusions>
                <!--先排除自带的zookeeper3.5.3-->
                <exclusion>
                    <groupId>org.apache.zookeeper</groupId>
                    <artifactId>zookeeper</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <!--添加zookeeper3.4.9版本-->
        <dependency>
            <groupId>org.apache.zookeeper</groupId>
            <artifactId>zookeeper</artifactId>
            <version>3.4.9</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</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>

验证测试

http://localhost:8004/payment/zk

验证测试2

获得json串后用在线工具查看试试

{"name":"cloud-provider-payment","id":"acb59c28-4624-411e-acb0-9098ce6c6877","address":"DESKTOP-VRN53RH","port":8004,"sslPort":null,"payload":{"@class":"org.springframework.cloud.zookeeper.discovery.ZookeeperInstance","id":"application-1","name":"cloud-provider-payment","Metadata":{}},"registrationTimeUTC":1583464388896,"serviceType":"DYNAMIC","uriSpec":{"parts":[{"value":"scheme","variable":true},{"value":"://","variable":false},{"value":"address",{"value":":",{"value":"port","variable":true}]}}

https://tool.lu/json/

思考

服务节点是临时节点还是持久节点？
答：临时节点

服务消费者

新建cloud-consumerzk-order80

POM

<?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>
    <description>订单消费者之注册中心zookeeper</description>

    <dependencies>
        <dependency>
            <groupId>com.atguigu.springcloud</groupId>
            <artifactId>cloud-api-common</artifactId>
            <version>${project.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!--SpringBoot整合Zookeeper客户端-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-zookeeper-discovery</artifactId>
            <exclusions>
                <!--先排除自带的zookeeper3.5.3-->
                <exclusion>
                    <groupId>org.apache.zookeeper</groupId>
                    <artifactId>zookeeper</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <!--添加zookeeper3.4.9版本-->
        <dependency>
            <groupId>org.apache.zookeeper</groupId>
            <artifactId>zookeeper</artifactId>
            <version>3.4.9</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</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>

YML

server:
  port: 80
spring:
  application:
    # 服务别名
    name: cloud-consumer-order
  cloud:
    zookeeper:
      # 注册到zookeeper地址
      connect-string: localhost:2181

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;

/**
 * @author zzyy
 * @date 2020/02/18 17:20
 **/
@SpringBootApplication
@EnableDiscoveryClient
public class OrderZkMain80 {
    public static void main(String[] args) {
        SpringApplication.run(OrderZkMain80.class,args);
    }
}

业务类

配置bean

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;

/**
 * @author zzyy
 * @date 2020-02-18 17:27
 **/
@Configuration
public class ApplicationContextConfig {
    @Bean
    @LoadBalanced
    public RestTemplate getRestTemplate() {
        return new RestTemplate();
    }
}

controller

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;

/**
 * @author zzyy
 * @create 2020-02-18 17:23
 **/
@RestController
@Slf4j
public class OrderZkController {

    public static final String INVOKE_URL = "http://cloud-provider-payment";
    @Resource
    private RestTemplate restTemplate;


    /**
     * http://localhost/consumer/payment/zk
     *
     * @return
     */
    @GetMapping("/consumer/payment/zk")
    public String paymentInfo() {
        return restTemplate.getForObject(INVOKE_URL + "/payment/zk",String.class);
    }
}

验证测试

访问测试地址

http://localhost/consumer/payment/zk

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