SpringCloud集成zookeeper
啊陈晓 人气:0SpringCloud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~
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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