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","variable":true},{"value":":","variable":false},{"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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