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 {
@Bean //将RestTemplate注册到容器中
@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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