SpringCloud(第六章 Zookeeper服务注册与发现)

文章目录

  • 一、Eureka停止更新了你怎么办
  • 二、SpringCloud整合Zookeeper代替Eureka
    • 1.liunx环境中zookeeper的部署
    • 2.注册中心Zookeeper
    • 3.服务提供者
    • 4.服务消费者

一、Eureka停止更新了你怎么办

https://github.com/Netflix/eureka/wiki
ps:官网提示不再更新SpringCloud(第六章 Zookeeper服务注册与发现)_第1张图片

二、SpringCloud整合Zookeeper代替Eureka

ps:zookeeper架构图:

SpringCloud(第六章 Zookeeper服务注册与发现)_第2张图片

1.liunx环境中zookeeper的部署

ps:zookeeper的启动依赖于java,所以安装zookeeper之前先安装java(此章节不详细介绍安装步骤,下面附上安装连接)

linux环境卸载openjdk
linux环境安装jdk
linux环境部署zookeeper

2.注册中心Zookeeper

前提条件:
1.在centos系统上安装成功zookeeper并启动成功
2.在本机win10和centos7都使用ping命令看是否可以ping通,ping不通关闭两端的防火墙试试,ping通后在可以做以下的注册操作。(zookeeper在centos7上,java程序在win10上)

1.zookeeper是一个分布式协调工具,可以实现注册中心功能。
2.关闭linux服务器防火墙后启动zookeeper服务器。
3.zookeeper服务器取代Eureka服务器,zk作为服务注册中心。

3.服务提供者

1.新建模块

新建cloud-provider-payment8004

2.改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>mscloud03</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Web组件 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency><!-- 引入自己定义的api通用包,可以使用Payment支付Entity -->
            <groupId>com.atguigu.springcloud</groupId>
            <artifactId>cloud-api-commons</artifactId>
            <version>${project.version}</version>
        </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-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>

3.新建yml文件

#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: 192.168.111.144:2181

4.主启动类

package com.atguigu.springcloud;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;

/**
 * @auther zzyy
 * @create 2020-01-30 16:54
 */
@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 PaymentMain8004
{
    public static void main(String[] args)
    {
        SpringApplication.run(PaymentMain8004.class,args);
    }

}

5.controller

package com.atguigu.springcloud.controller;

import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.beans.factory.annotation.Value;

import java.util.UUID;

/**
 * @auther zzyy
 * @create 2020-01-30 16:55
 */
@RestController
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();
    }
}

6.启动8004注册进zookeeper

1.启动后问题:
SpringCloud(第六章 Zookeeper服务注册与发现)_第3张图片
2.why
2.1zookeeper版本jar包冲突问题(项目进入版本与centos7中zookeeper版本不一样)
在这里插入图片描述
SpringCloud(第六章 Zookeeper服务注册与发现)_第4张图片
2.2解决方案:排出zk冲突后的新pom如下:

<?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>mscloud03</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Web组件 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency><!-- 引入自己定义的api通用包,可以使用Payment支付Entity -->
            <groupId>com.atguigu.springcloud</groupId>
            <artifactId>cloud-api-commons</artifactId>
            <version>${project.version}</version>
        </dependency>
        <!-- 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zookeeper3.4.9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-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>

7.验证测试:

http://localhost:8004/payment/zk

SpringCloud(第六章 Zookeeper服务注册与发现)_第5张图片
8.验证测试2

获得json串后用在线工具查看试试

SpringCloud(第六章 Zookeeper服务注册与发现)_第6张图片
9.思考

服务节点是临时节点还是持久节点?

SpringCloud(第六章 Zookeeper服务注册与发现)_第7张图片
由上图可以看出服务停止,zookeeper就将服务移除,在下次重新注入节点,所以zookeeper服务节点是临时节点。

4.服务消费者

1.新建module

新建cloud-consumerzk-order80

2.改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>mscloud</artifactId>
        <groupId>com.atguigu.springcloud</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>cloud-consumerzk-order81</artifactId>


    <dependencies>
        <!-- SpringBoot整合Web组件 -->
        <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>
            <!--先排除自带的zookeeper-->
            <exclusions>
                <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-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>

3.添加yml文件

server:
  port: 80

spring:
  application:
    name: cloud-consumer-order
  cloud:
  #注册到zookeeper地址
    zookeeper:
      connect-string: 192.168.111.144:2181

4.主启动

package com.atguigu.springcloud;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

/**
 * @auther zzyy
 * @create 2020-01-30 17:32
 */
@SpringBootApplication
public class OrderZK80
{
    public static void main(String[] args)
    {
        SpringApplication.run(OrderZK80.class,args);
    }
}

5.业务类
5.1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;

/**
 * @auther zzyy
 * @create 2020-01-30 17:33
 */
@Configuration
public class ApplicationContextBean
{
    @Bean
    @LoadBalanced
    public RestTemplate getRestTemplate()
    {
        return new RestTemplate();
    }
}

5.2controller

package com.atguigu.springcloud.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

/**
 * @auther zzyy
 * @create 2020-01-30 17:34
 */
@RestController
public class OrderZKController
{
    public static final String INVOKE_URL = "http://cloud-provider-payment";

    @Autowired
    private RestTemplate restTemplate;

    @RequestMapping(value = "/consumer/payment/zk")
    public String paymentInfo()
    {
        String result = restTemplate.getForObject(INVOKE_URL+"/payment/zk", String.class);
        System.out.println("消费者调用支付服务(zookeeper)--->result:" + result);
        return result;
    }

}

6.验证测试
SpringCloud(第六章 Zookeeper服务注册与发现)_第8张图片
7.访问测试地址

http://localhost/consumer/payment/zk
页面展示如下:在这里插入图片描述

ps:尚硅谷SpringCloud学习笔记

SpringCloud(第一章 零基础理论入门)
SpringCloud(第二章 从2.2.x和H版开始说起)
SpringCloud(第三章 关于Cloud各种组件的停更/升级/替换)
SpringCloud(第四章 服务架构编码构建)
SpringCloud(第五章 Eureka服务注册与发现)
SpringCloud(第六章 Zookeeper服务注册与发现)
SpringCloud(第七章 Consul服务注册与发现)
SpringCloud(第八章 Ribbon负载均衡服务调用)
SpringCloud(第九章 OpenFeign服务接口调用)
SpringCloud(第十章 Hystrix断路器)
SpringCloud(第十一章 Gateway新一代网关)
SpringCloud(第十二章 SpringCloud Config 分布式配置中心)
SpringCloud(第十三章 SpringCloud Bus 消息总线)
SpringCloud(第十四章 SpringCloud Stream 消息驱动)
SpringCloud(第十五章 SpringCloud Sleuth 分布式请求链路跟踪)
SpringCloud(第十六章 SpringCloud Alibaba 入门简介)
SpringCloud(第十七章 SpringCloud Alibaba Nacos服务注册和配置中心)
SpringCloud(第十八章 SpringCloud Alibaba Sentinel实现熔断与限流)
SpringCloud(第十九章 SpringCloud Alibaba Seata处理分布式事务)
SpringCloud(第二十章 SpringCloud之雪花算法)

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