Spring Cloud之整合ZK作為注冊中心

Eureka已經閉源了，用zk可以替代之

Eureka 作為注冊中心

Dubbo也是zk作為注冊中心的

 Zookeeper簡介

Zookeeper是一個分布式協調工具，可以實現服務注冊與發現、注冊中心、消息中間件、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>
	<!-- 管理依賴 -->
	<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組件 -->
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>
		<!-- SpringBoot整合eureka客戶端 -->
		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-zookeeper-discovery</artifactId>
		</dependency>

	</dependencies>
	<!-- 注意： 這里必須要添加， 否者各種依賴有問題 -->
	<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 //如果服務使用consul或者zk使用這個注解 向注冊中心注冊服務
public class zkMemberApiController {
    @Value("${server.port}")
    private String serverPort;
    
    
    @RequestMapping("/getMember")
  public String getMember() {
        return "會員服務prot:"+serverPort;
  }
    
    public static void main(String[] args) {
        SpringApplication.run(zkMemberApiController.class, args);
    }
}

###訂單服務的端口號
server:
port: 8003
###服務別名----服務注冊到注冊中心名稱
spring:
application:
name: zk-member
cloud:
zookeeper:
connect-string: 192.168.91.7:2181

 

啟動后: yml配置文件的別名

通過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

###訂單服務的端口號
server:
  port: 8002
###服務別名----服務注冊到注冊中心名稱 
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 //如果服務使用consul或者zk使用這個注解 向注冊中心注冊服務
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();
    }
}

可以實現輪詢