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SpringCloud集成zookeeper

啊陈晓 人气:0

SpringCloud整合zookeeper实现服务注册

前言:

zookeeper是一个分布式协调工具,可以实现注册中心功能。换而言之,zookeeper和eureka一样,是用于充当服务注册功能服务器的一个springcloud插件。而随着eureka停止更新,zookeeper也成为了市面大量使用的替代eureka的一门技术,为分布式项目实现注册中心的功能。

一.环境准备

1.linux环境下的zookeeper环境

如果还未配置zookeeper环境的同学可以移步我的另外一篇文章喔,那里对如何在Linux环境下安装zookeeper有着很详细的介绍~

linux上安装zookeeper 启动和关闭的教程

2.一个简单的springcloud父项目环境

在cloud2022项目中的pom.xml导入springcloud依赖和一些常规依赖

<?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">
    <modelVersion>4.0.0</modelVersion>
 
    <groupId>com.canrioyuan</groupId>
    <artifactId>cloud2022</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>pom</packaging>
    <!--父工程的打包方式必须为pom:表示父工程不写代码,只在父工程的pom.xml文件中使用配置版本,
        子工程的打包方式才是war:发布在服务器上的工程,如网站或者是服务,maven会自动帮助我们指明这个工程为web工程
                        jar:默认打程jar工程,相当于打包-->
 
    <modules>
        <module>cloud-provider-payment8001</module>
        <module>cloud-consumer-order80</module>
        <module>cloud-api-commons</module>
        <module>cloud-eureka-server7001</module>
        <module>cloud-eureka-server7002</module>
        <module>cloud-provider-payment8002</module>
        <module>cloud-provider-payment8004</module>
    </modules>
 
    <!-- 统一管理jar包版本 -->
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
        <junit.version>4.12</junit.version>
        <log4j.version>1.2.17</log4j.version>
        <lombok.version>1.18.24</lombok.version>
        <mysql.version>8.0.21</mysql.version>
        <druid.version>1.1.21</druid.version>
        <mybatis-plus.spring.boot.version>3.5.1</mybatis-plus.spring.boot.version>
    </properties>
 
    <!-- 子模块继承之后,提供作用:锁定版本+子module不用写groupId和version  -->
    <dependencyManagement>
        <!--只是声明依赖,并不实现引入-->
        <dependencies>
            <!--spring boot 2.2.2-->
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>2.2.2.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <!--spring cloud Hoxton.SR1-->
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Hoxton.SR1</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <!--spring cloud alibaba 2.1.0.RELEASE-->
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-alibaba-dependencies</artifactId>
                <version>2.1.0.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <dependency>
                <groupId>mysql</groupId>
                <artifactId>mysql-connector-java</artifactId>
                <version>${mysql.version}</version>
            </dependency>
            <dependency>
                <groupId>com.alibaba</groupId>
                <artifactId>druid-spring-boot-starter</artifactId>
                <version>${druid.version}</version>
            </dependency>
            <dependency>
                <groupId>com.baomidou</groupId>
                <artifactId>mybatis-plus-boot-starter</artifactId>
                <version>${mybatis-plus.spring.boot.version}</version>
            </dependency>
            <dependency>
                <groupId>junit</groupId>
                <artifactId>junit</artifactId>
                <version>${junit.version}</version>
            </dependency>
            <dependency>
                <groupId>log4j</groupId>
                <artifactId>log4j</artifactId>
                <version>${log4j.version}</version>
            </dependency>
            <dependency>
                <groupId>org.projectlombok</groupId>
                <artifactId>lombok</artifactId>
                <version>${lombok.version}</version>
                <optional>true</optional>
            </dependency>
 
        </dependencies>
    </dependencyManagement>
 
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <fork>true</fork>
                    <addResources>true</addResources>
                </configuration>
            </plugin>
        </plugins>
    </build>
 
</project>

二.编写服务提供者模块

1.在cloud2022下创建一个cloud-provider-payment8004作为服务提供者

2.在pom.xml文件中添加常规依赖和zookeeper、springboot整合zookeeper客户端等依赖

        <!-- 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>
            <!--除去自带的zookeeper依赖-->
            <exclusions>
                <exclusion>
                    <groupId>org.apache.zookeeper</groupId>
                    <artifactId>zookeeper</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
 
        <!--导入符合安装版本的zookeeper依赖-->
        <dependency>
            <groupId>org.apache.zookeeper</groupId>
            <artifactId>zookeeper</artifactId>
            <version>3.7.1</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>

3.编写application.yaml

#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
    #连接zookeeper
  cloud:
    zookeeper:
      connect-string: 192.168.154.133:2181  #此处为对应的zookeeper客户端地址

4.编写主启动类PaymentMain8004

package com.canrioyuan;
 
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.编写PaymentController

package com.canrioyuan.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;
 
@RestController
@Slf4j
public class PaymentController {
    
    //获取配置文件中端口对应的值
    @Value("${server.port}")
    private String serverPort;
 
    @RequestMapping(value = "/payment/zk")
    public String paymentzk()
    {
        return "springcloud with zookeeper: "+serverPort+"\t"+ UUID.randomUUID().toString();
    }
 
}

三.测试服务提供者模块是否搭建成功

1.运行zookeeper的客户端

进入zookeeper安装目录下的bin目录,启动zookeeper服务器

[root@zookeeper1 bin]# ./zkServer.sh start

启动zookeeper客户端

[root@zookeeper1 bin]# zkCli.sh

启动成功

可以看到,此时zookeeper中的节点只有locks和zookeeper:

2.运行PaymentMain8004

运行成功后如下图所示:

3.查看zookeeper中的节点

我们再一次查看zookeeper下的节点,可以看到services已经被注册且services下的节点即为我们application.yaml为该模块配置的名字

4.访问http://localhost:8004/payment/zk

出现如下字符串则证明搭建成功

四.编写服务消费者模块

1.在cloud2022下创建一个cloud-consumerzk-order80作为服务消费者

2.在pom.xml文件中添加常规依赖和zookeeper、springboot整合zookeeper客户端等依赖

 <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>3.7.1</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>

3.编写application.yaml

server:
  port: 80
 
spring:
  application:
    name: cloud-consumer-order
  cloud:
    #注册到zookeeper地址
    zookeeper:
      connect-string: 192.168.154.133:2181   #zookeeper环境所在的Ip地址

4.编写主启动类PaymentMain8004

package com.canrioyuan;
 
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
 
@SpringBootApplication
public class OrderZk80 {
    public static void main(String[] args) {
        SpringApplication.run(OrderZk80.class,args);
    }
}

5.编写配置类ApplicationContextConfig(用于注册RestTemplate)

package com.canrioyuan.controller;
 
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 {
    /**
     * RestTemplate是Spring提供的用于访问Rest服务的客户端,
     * 它提供了很多可以方便访问远程http服务的方法,这些方法可以帮助开发人员减少编写客户端代码的工作量。
     * @return
     */
    @Bean  //将RestTemplate注册到容器中
    /**
     * @LoadBalanced注解,我们在使用这个注解后,就能在调用其他微服务的时候,通过服务实例名称就能进行调用其他的微服务,
     * 而不是直接把要调用的微服务的ip和端口号写死在代码当中。
     */
    @LoadBalanced
    public RestTemplate getRestTemplate(){
        return new RestTemplate();
    }
}

6.编写OrderController

package com.canrioyuan.controller;
 
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
public class OrderZkController {
    //声明固定的服务访问前缀
    public static final String INVOKE_URL ="http://cloud-provider-payment";
    //注入容器中注册的RestTemplate
    @Resource
    private RestTemplate restTemplate;
 
    @GetMapping(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_result:"+result);
        return result;
    }
}

五.测试服务消费者模块是否搭建成功

1.启动该服务消费者模块

2.访问http://localhost/consumer/payment/zk

结果如下则搭建成功

至此,我们SpringCloud集成zookeeper实现服务注册的教程就结束啦~

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