1. Zookeeper服务注册与发现
1.1 使用docker安装zookeeper
docker安装教程请查看这篇博客:docker安装教程
- 下载镜像
docker pull zookeeper:3.4.9
- 启动容器并添加映射:
docker run --privileged=true -d --name zookeeper --publish 2181:2181 -d zookeeper:3.4.9
- 查看是否启动
1.2 SpringCloud整合Zookeeper代替Eureka
zookeeper是一个分布式协调工具,可以实现注册中心功能
关闭Linux服务器防火墙后启动zookeeper服务器
zookeeper服务器取代Eureka服务器,zk作为服务注册中心
服务提供者
- 新建 cloud-provider-payment8004 模块
- 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>spring-cloud-demo</artifactId>
<groupId>com.lele.springcloud</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>cloud-provider-payment8004</artifactId>
<dependencies>
<!-- SpringBoot 整合 zookeeper 客户端-->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-zookeeper-discovery</artifactId>
</dependency>
<!-- 引入自定义的api通用包,可以使用Payment支付Entity -->
<dependency>
<groupId>com.lele.springcloud</groupId>
<artifactId>cloud-api-commons</artifactId>
<version>${project.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- <dependency>-->
<!-- <groupId>org.springframework.boot</groupId>-->
<!-- <artifactId>spring-boot-starter-actuator</artifactId>-->
<!-- </dependency>-->
<!-- <dependency>-->
<!-- <groupId>org.mybatis.spring.boot</groupId>-->
<!-- <artifactId>mybatis-spring-boot-starter</artifactId>-->
<!-- </dependency>-->
<!-- <dependency>-->
<!-- <groupId>com.alibaba</groupId>-->
<!-- <artifactId>druid-spring-boot-starter</artifactId>-->
<!-- <version>1.1.10</version>-->
<!-- </dependency>-->
<!-- <dependency>-->
<!-- <groupId>mysql</groupId>-->
<!-- <artifactId>mysql-connector-java</artifactId>-->
<!-- </dependency>-->
<!-- <dependency>-->
<!-- <groupId>org.springframework.boot</groupId>-->
<!-- <artifactId>spring-boot-starter-jdbc</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>
- 建 yml
#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: localhost:2181 #zookeeper所在的主机ip地址
- 主启动类
package com.lele.springcloud;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
/**
* @author: lele
* @date: 2021/3/9 22:24
* @description:
*/
@SpringBootApplication
@EnableDiscoveryClient
public class PaymentMain8004 {
public static void main(String[] args) {
SpringApplication.run(PaymentMain8004.class, args);
}
}
- Controller
package com.lele.springcloud.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;
/**
* @author: lele
* @date: 2021/3/10 7:00
* @description:
*/
@RestController
@Slf4j
public class PaymentController {
@Value("${server.port")
private String serverPort;
@RequestMapping(value = "/payment/zk")
public String paymentzk() {
return "spring cloud with zookeeper: " +serverPort+"\t"+ UUID.randomUUID().toString();
}
}
-
启动8004注册进zookeeper
-
解决zookeeper版本jar包冲突问题
-
修改pom
<!-- 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>
<exclusions>
<exclusion>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
</exclusion>
</exclusions>
</dependency>
- 访问:http://localhost:8003/payment/zk
- 验证测试:
docker exec -it 容器id /bin/bash
cd bin/
zkCli.sh
ls /
ls /services
这里node的名字就是yml配置的springapplication的名字
- 验证测试2:
ls /services/cloud-provider-payment
get /services/cloud-provider-payment/a855f6d9-cb61-478e-919d-660d62e9f951
思考:
服务节点是临时节点还是持久节点:
是临时节点。
服务消费者
- 新建 cloud-consumerzk-order80 模块
- 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>spring-cloud-demo</artifactId>
<groupId>com.lele.springcloud</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>cloud-consumerzk-order80</artifactId>
<dependencies>
<!-- 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>
<exclusions>
<exclusion>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
</exclusion>
</exclusions>
</dependency>
<!-- 引入自定义的api通用包,可以使用Payment支付Entity -->
<dependency>
<groupId>com.lele.springcloud</groupId>
<artifactId>cloud-api-commons</artifactId>
<version>${project.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</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>
- yml
server:
port: 80
spring:
application:
name: cloud-consumer-order
cloud:
#注册到zookeeper地址
zookeeper:
connect-string: localhost:2181 #zookeeper所在的主机ip地址
- 主启动类
package com.lele.springcloud;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
/**
* @author: lele
* @date: 2021/3/10 22:16
* @description:
*/
@SpringBootApplication
@EnableDiscoveryClient
public class OrderZKMain80 {
public static void main(String[] args) {
SpringApplication.run(OrderZKMain80.class, args);
}
}
- 配置RestTemplate:
package com.lele.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: lele
* @date: 2021/3/10 22:21
* @description:
*/
@Configuration
public class ApplicationContextConfig {
@Bean
@LoadBalanced
public RestTemplate getRestTemplate() {
return new RestTemplate();
}
}
- controller
package com.lele.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: lele
* @date: 2021/3/10 22:26
* @description:
*/
@RestController
@Slf4j
public class OrderZKController {
public static final String INVOKE_URL = "http://cloud-provider-payment";
@Resource
private RestTemplate restTemplate;
@GetMapping(value = "/consumer/payment/zk")
public String paymentInfo() {
String result = restTemplate.getForObject(INVOKE_URL+"/payment/zk", String.class);
return result;
}
}
启动80注册进zookeeper
- 访问:
http://localhost/consumer/payment/zk