Spring Cloud之整合ZK作为注册中心

Posted 2021-01-19 toov5

Eureka已经闭源了，用zk可以替代之

Eureka 作为注册中心

Dubbo也是zk作为注册中心的

 Zookeeper简介

Zookeeper是一个分布式协调工具，可以实现服务注册与发现、注册中心、消息中间件、分布式配置中心等。

 

公共pom：

<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>2.0.1.RELEASE</version>
	</parent>
	<!-- 管理依赖 -->
	<dependencyManagement>
		<dependencies>
			<dependency>
				<groupId>org.springframework.cloud</groupId>
				<artifactId>spring-cloud-dependencies</artifactId>
				<version>Finchley.M7</version>
				<type>pom</type>
				<scope>import</scope>
			</dependency>
		</dependencies>
	</dependencyManagement>
	<dependencies>
		<!-- SpringBoot整合Web组件 -->
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>
		<!-- SpringBoot整合eureka客户端 -->
		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-zookeeper-discovery</artifactId>
		</dependency>

	</dependencies>
	<!-- 注意： 这里必须要添加， 否者各种依赖有问题 -->
	<repositories>
		<repository>
			<id>spring-milestones</id>
			<name>Spring Milestones</name>
			<url>https://repo.spring.io/libs-milestone</url>
			<snapshots>
				<enabled>false</enabled>
			</snapshots>
		</repository>
	</repositories>
  

　　

package com.toov5.controller;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
@SpringBootApplication
@EnableDiscoveryClient //如果服务使用consul或者zk使用这个注解 向注册中心注册服务
public class zkMemberApiController {
    @Value("${server.port}")
    private String serverPort;
    
    
    @RequestMapping("/getMember")
  public String getMember() {
        return "会员服务prot:"+serverPort;
  }
    
    public static void main(String[] args) {
        SpringApplication.run(zkMemberApiController.class, args);
    }
}

###订单服务的端口号
server:
port: 8003
###服务别名----服务注册到注册中心名称
spring:
application:
name: zk-member
cloud:
zookeeper:
connect-string: 192.168.91.7:2181

 

启动后: yml配置文件的别名

通过json解析工具：

{
	"name": "zk-member",
	"id": "c01a3167-71c4-4d8a-8584-332c659e2d57",
	"address": "localhost",
	"port": 8002,
	"sslPort": null,
	"payload": {
		"@class": "org.springframework.cloud.zookeeper.discovery.ZookeeperInstance",
		"id": "application-1",
		"name": "zk-member",
		"metadata": {}
	},
	"registrationTimeUTC": 1542086637317,
	"serviceType": "DYNAMIC",
	"uriSpec": {
		"parts": [{
			"value": "scheme",
			"variable": true
		}, {
			"value": "://",
			"variable": false
		}, {
			"value": "address",
			"variable": true
		}, {
			"value": ":",
			"variable": false
		}, {
			"value": "port",
			"variable": true
		}]
	}
}

　　

 yml

###订单服务的端口号
server:
  port: 8002
###服务别名----服务注册到注册中心名称 
spring:
  application:
    name: zk-order
  cloud:
    zookeeper:
      connect-string: 192.168.91.7:2181

　　controller

package com.toov5.api.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.client.loadbalancer.LoadBalanced;
import org.springframework.context.annotation.Bean;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

@RestController
@SpringBootApplication
@EnableDiscoveryClient //如果服务使用consul或者zk使用这个注解 向注册中心注册服务
public class zkOrderApiController {
    @Value("${server.port}")
    private String serverPort;
    @Autowired
    private RestTemplate restTemplate;
    
    @RequestMapping("/orderToMember")
  public String orderToMember() {
        String url ="http://zk-member/getMember"; 
        return restTemplate.getForObject(url, String.class);
  }
    
    public static void main(String[] args) {
        SpringApplication.run(zkOrderApiController.class, args);
    }
    @Bean
    @LoadBalanced
    RestTemplate restTemplate() {
        return new RestTemplate();
    }
}

可以实现轮询