SpringCloud 2020-Zookeeper服务注册与发现（笔记）
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Zookeeper服务注册与发现
-
- 1、准备
- 2、服务提供者注册进zookeeper
- 3、服务消费者注册进zookeeper
- 4、下一篇：SpringCloud 2020-Consul服务注册与发现
- 视频地址：
1、准备
需要在linux虚拟机上安装zookeeper
- 关闭防火墙
- 查看linux的ip地址
2、服务提供者注册进zookeeper
1、 新建cloud-provider-payment8004
2、pom.xml
<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>cloud2020artifactId>
<groupId>com.liukai.springcloudgroupId>
<version>1.0-SNAPSHOTversion>
parent>
<modelVersion>4.0.0modelVersion>
<artifactId>cloud-provider-payment8004artifactId>
<dependencies>
<dependency>
<groupId>com.liukai.springcloudgroupId>
<artifactId>cloud-api-commonsartifactId>
<version>${project.version}version>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-webartifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-actuatorartifactId>
dependency>
<dependency>
<groupId>org.springframework.cloudgroupId>
<artifactId>spring-cloud-starter-zookeeper-discoveryartifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-devtoolsartifactId>
<scope>runtimescope>
<optional>trueoptional>
dependency>
<dependency>
<groupId>org.projectlombokgroupId>
<artifactId>lombokartifactId>
<optional>trueoptional>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-testartifactId>
<scope>testscope>
dependency>
dependencies>
project>
3、yml
server:
port: 8004
spring:
application:
name: cloud-provider-payment
cloud:
zookeeper:
connect-string: 192.168.4.100:2181
4、主启动类PaymentMain8004
package com.liukai.springcloud;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
/**
* @author liukai
* @version 1.0.0
* @ClassName PaymentMain8004.java
* @Description TODO
* @createTime 2021年03月20日 21:54:00
*/
@SpringBootApplication
@EnableDiscoveryClient
public class PaymentMain8004 {
public static void main(String[] args) {
SpringApplication.run(PaymentMain8004.class);
}
}
5、PaymentController
package com.liukai.springcloud.controller;
import cn.hutool.core.lang.UUID;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
/**
* @author liukai
* @version 1.0.0
* @ClassName PaymentController.java
* @Description TODO
* @createTime 2021年03月20日 21:59:00
*/
@RestController
@Slf4j
public class PaymentController {
@Value("${server.port}")
private String serverPort;
@GetMapping(value = "/payment/zk")
public String paymentzk(){
return "springcloud with zookeeper:"+serverPort+"\t"+ UUID.randomUUID().toString();
}
}
6、启动zookeeper服务端
7、启动zookeeper客户端
8、用ls /命令查看zookeeper注册了哪些，目前只有一个默认的zookeeper节点
9、启动PaymentMain8004，发现报错了
解决zookeeper版本jar包冲突问题：将zookeeper依赖的版本修改成和linux上面的zookeeper版本一样。修改pom.xml为以下
<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>cloud2020artifactId>
<groupId>com.liukai.springcloudgroupId>
<version>1.0-SNAPSHOTversion>
parent>
<modelVersion>4.0.0modelVersion>
<artifactId>cloud-provider-payment8004artifactId>
<dependencies>
<dependency>
<groupId>com.liukai.springcloudgroupId>
<artifactId>cloud-api-commonsartifactId>
<version>${project.version}version>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-webartifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-actuatorartifactId>
dependency>
<dependency>
<groupId>org.springframework.cloudgroupId>
<artifactId>spring-cloud-starter-zookeeper-discoveryartifactId>
<exclusions>
<exclusion>
<groupId>org.apache.zookeepergroupId>
<artifactId>zookeeperartifactId>
exclusion>
exclusions>
dependency>
<dependency>
<groupId>org.apache.zookeepergroupId>
<artifactId>zookeeperartifactId>
<version>3.4.11version>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-devtoolsartifactId>
<scope>runtimescope>
<optional>trueoptional>
dependency>
<dependency>
<groupId>org.projectlombokgroupId>
<artifactId>lombokartifactId>
<optional>trueoptional>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-testartifactId>
<scope>testscope>
dependency>
dependencies>
project>
修改之后就能启动成功了
10、zookeeper客户端查看8004是否注册成功
11、测试：访问http://localhost:8004/payment/zk
服务节点是临时节点还是持久节点：是临时节点
关闭了8004端口等一会儿，zookeeper会清理掉8004的服务
3、服务消费者注册进zookeeper
1、新建cloud-consumerzk-order80
2、pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<parent>
<artifactId>cloud2020artifactId>
<groupId>com.liukai.springcloudgroupId>
<version>1.0-SNAPSHOTversion>
parent>
<modelVersion>4.0.0modelVersion>
<artifactId>cloud-provider-payment8004artifactId>
<dependencies>
<dependency>
<groupId>com.liukai.springcloudgroupId>
<artifactId>cloud-api-commonsartifactId>
<version>${project.version}version>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-webartifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-actuatorartifactId>
dependency>
<dependency>
<groupId>org.springframework.cloudgroupId>
<artifactId>spring-cloud-starter-zookeeper-discoveryartifactId>
<exclusions>
<exclusion>
<groupId>org.apache.zookeepergroupId>
<artifactId>zookeeperartifactId>
exclusion>
exclusions>
dependency>
<dependency>
<groupId>org.apache.zookeepergroupId>
<artifactId>zookeeperartifactId>
<version>3.4.11version>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-devtoolsartifactId>
<scope>runtimescope>
<optional>trueoptional>
dependency>
<dependency>
<groupId>org.projectlombokgroupId>
<artifactId>lombokartifactId>
<optional>trueoptional>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-testartifactId>
<scope>testscope>
dependency>
dependencies>
project>
3、yml
server:
port: 80
spring:
application:
name: cloud-consumer-order
cloud:
zookeeper:
connect-string: 192.168.4.100:2181
4、主启动类OrderZKMain80
package com.liukai.springcloud;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
/**
* @author liukai
* @version 1.0.0
* @ClassName OrderZKMain80.java
* @Description TODO
* @createTime 2021年03月20日 22:27:00
*/
@SpringBootApplication
@EnableDiscoveryClient
public class OrderZKMain80 {
public static void main(String[] args) {
SpringApplication.run(OrderZKMain80.class);
}
}
5、添加配置类ApplicationContextConfig.java
package com.liukai.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 liukai
* @version 1.0.0
* @ClassName ApplicationContextConfig.java
* @Description TODO
* @createTime 2021年03月20日 22:29:00
*/
@Configuration
public class ApplicationContextConfig {
// 注入RestTemplate
@Bean
@LoadBalanced // 使用@LoadBalanced注解赋予RestTemplate负载均衡的能力。
public RestTemplate getRestTemplate(){
return new RestTemplate();
}
}
6、controller
package com.liukai.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 liukai
* @version 1.0.0
* @ClassName OrderZKController.java
* @Description TODO
* @createTime 2021年03月20日 22:31:00
*/
@RestController
@Slf4j
public class OrderZKController {
public static final String INVOKE_URL = "http://cloud-provider-payment";
@Resource
private RestTemplate restTemplate;
@GetMapping("/consumer/payment/zk")
public String payment (){
String result = restTemplate.getForObject(INVOKE_URL+"/payment/zk",String.class);
return result;
}
}
7、zookeeper客户端查看，发现cloud-consumer-order注册成功
8、测试 ：访问http://localhost/consumer/payment/zk
搭建zookeeper的集群方式和eureka类似
4、下一篇：SpringCloud 2020-Consul服务注册与发现
SpringCloud 2020-Consul服务注册与发现
视频地址：
此笔记的视频地址：尚硅谷SprngCloud（H版&alibaba框架开发教程（大牛讲授SpringCloud））