Spring Cloud在Docker映象中的Zookeeper服務
阿新 • • 發佈：2021-02-04
技術標籤：JAVA框架學習分散式javaspringspring bootzookeeper
Spring Cloud在Docker映象中的Zookeeper服務
文章目錄
一、什麼是Zookeeper
ZooKeeper是一個分散式的，開放原始碼的分散式應用程式協調服務，是Google的Chubby一個開源的實現，是Hadoop和Hbase的重要元件。它是一個為分散式應用提供一致性服務的軟體，提供的功能包括：配置維護、域名服務、分散式同步、組服務等。
ZooKeeper的目標就是封裝好複雜易出錯的關鍵服務，將簡單易用的介面和效能高效、功能穩定的系統提供給使用者。
ZooKeeper包含一個簡單的原語集，提供Java和C的介面。
註冊中心zookeeper
-
zookeeper是一個分散式協調工具，可以實現註冊中心功能
-
關閉Linux伺服器防火牆後啟動zookeeper伺服器systemctl stop firewalld
-
zookeeper伺服器取代Eureka伺服器，zk作為服務註冊中心
二、配置使用步驟
服務提供者
1.新建cloud-provider-payment8004 Maven專案
2.POM檔案
<?xml version="1.0" encoding="UTF-8"?> 3.application.yml檔案
#8004表示註冊到zookeeper伺服器的支付服務提供者埠號
server:
port: 8004
#服務別名----註冊zookeeper到註冊中心名稱
spring:
application:
name: cloud-provider-payment
cloud:
zookeeper:
connect-string: 192.168.1.123:2181
4.主啟動類 PaymentMain8004
package com.cloud.springcloud;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
@SpringBootApplication
@EnableDiscoveryClient
public class PaymentMain8004 {
public static void main(String[] args) {
SpringApplication.run(PaymentMain8004.class, args);
}
}
5.controller
package com.cloud.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;
@RestController
@Slf4j
public class PaymentController {
@Value("{server.port}")
private String serverPort;
@RequestMapping(value = "/payment/zk")
public String paymentzk(){
return "springcloud with zookeeper: " + serverPort + "\t" + UUID.randomUUID().toString();
}
}
6. 在Docker中加入Zookeeper映象
7.驗證測試
服務消費者
1.新建cloud-consumerzk-order80 Maven專案
2.POM檔案
<?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>cloud2020</artifactId>
<groupId>com.cloud.springcloud</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>cloud-consumerzk-order80</artifactId>
<properties>
<maven.compiler.source>12</maven.compiler.source>
<maven.compiler.target>12</maven.compiler.target>
</properties>
<dependencies>
<!-- SpringBoot整合Web元件 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- SpringBoot整合zookeeper客戶端 -->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-zookeeper-discovery</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>
3.application.yml
server:
port: 80
spring:
application:
name: cloud-consumer-order
cloud:
#註冊到zookeeper地址
zookeeper:
connect-string: 192.168.1.123:2181
4.主啟動類 OrderZKMain80
package com.cloud.springcloud;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
@SpringBootApplication
@EnableDiscoveryClient
public class OrderZKMain80 {
public static void main(String[] args) {
SpringApplication.run(OrderZKMain80.class, args);
}
}
5.config
package com.cloud.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;
@Configuration
public class ApplicationContextConfig {
@Bean
@LoadBalanced
public RestTemplate getRestTemplate(){
return new RestTemplate();
}
}
6.controller
package com.cloud.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;
@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;
}
}
7.驗證測試
