springcloud-Eureka搭建服務註冊中心
阿新 • • 發佈：2018-11-21
目錄：
1、搭建服務註冊的服務端;
2、將Spring boot的一個專案做為服務註冊進去；
一、搭建服務註冊的服務端
1、首先通過IntelliJ IDEA或其它IDE建立一個spring boot 專案；
2、在pom.xml檔案中新增spring cloud的版本依賴和Eureka的服務端依賴，具體程式碼如下：
<?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"> <modelVersion>4.0.0</modelVersion> <groupId>com.lyq.demo</groupId> <artifactId>eureka-server</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>eureka-server</name> <description>eureka-server project for Spring Boot</description> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>1.5.9.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <java.version>1.8</java.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <!-- 新增springcloud-erueka服務端依賴 --> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-eureka-server</artifactId> </dependency> </dependencies> <!-- spring-cloud版本依賴 --> <dependencyManagement> <dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-dependencies</artifactId> <version>Dalston.SR1</version> <type>pom</type> <scope>import</scope> </dependency> </dependencies> </dependencyManagement> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>
3、通過註解@EnableEurekaServer啟動此為一個服務註冊中心提供給其它應用進行對話，具體程式碼如下：
package com.lyq.demo; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.boot.builder.SpringApplicationBuilder; import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer; /** * 通過@EnableEurekaServer開啟此端為服務註冊中心 */ @SpringBootApplication @EnableEurekaServer public class EurekaServerApplication { public static void main(String[] args) { SpringApplication.run(EurekaServerApplication.class, args); } }
4、在application.yml或者application.properties(格式自己去做對應的改變)檔案中進行註冊服務端的引數配置：
#配置埠 server: port: 1111 #配置為Eureka的服務端-服務註冊中心 eureka: instance: hostname: localhost client: #因為自己是註冊中心，設定為false，表示不向註冊中心註冊自己 register-with-eureka: false #因為自己是註冊中心，設定為false，表示不需要去檢索服務 fetch-registry: false #Eureka客戶端將要註冊的註冊中心的地址 serviceUrl: defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/
5、編譯執行專案即可，在瀏覽器輸入: http://localhost:1111出現Eureka資訊面板
二、將Spring boot的一個專案做為服務註冊進去
1、建立一個springboot專案eureka-clientone;
2、在pom.xml引入springcloud的依賴還有eureka-client的依賴，具體如下：
<?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">
<modelVersion>4.0.0</modelVersion>
<groupId>com.lyq.demo</groupId>
<artifactId>eureka-clientone</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>eureka-clientone</name>
<description>eureka-clientone project for Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.9.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<!-- springcloud-eureka-client依賴 -->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-eureka</artifactId>
</dependency>
</dependencies>
<!-- spring-cloud版本依賴 -->
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>Dalston.SR1</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
3、通過註解@EnableEurekaClient開啟註冊功能，啟用Eureka的DiscoveryClient實現，具體程式碼如下：
package com.lyq.demo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
/**
* 使用註解@EnableEurekaClient開啟註冊功能，啟用Eureka的DiscoveryClient實現
* @author : lyq
* @date : 2018/1/9
*/
@SpringBootApplication
@EnableEurekaClient
public class EurekaClientoneApplication {
public static void main(String[] args) {
SpringApplication.run(EurekaClientoneApplication.class, args);
}
}
4、在application.yml或者application.properties(格式自己去做對應的改變)檔案中進行註冊服務端的引數配置：
# 配置註冊到註冊中心的服務名稱
spring:
application:
name: hello-service
# 配置服務註冊中心的地址
eureka:
client:
serviceUrl:
defaultZone: http://localhost:1111/eureka/5、如果需要列印請求的日誌，在HelloController裡面註解DiscoveryClient物件來獲取資訊列印，具體如下：
package com.lyq.demo.controller;
import org.apache.log4j.Logger;
import org.omg.PortableInterceptor.SYSTEM_EXCEPTION;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
/**
* @author : lyq
* @date : 2018/1/9
*/
@RestController
public class HelloController {
private final Logger logger = Logger.getLogger(HelloController.class);
@Autowired
private DiscoveryClient discoveryClient;
@GetMapping("hello")
public String hello() {
ServiceInstance instance = discoveryClient.getLocalServiceInstance();
System.out.println("********************************************");
System.out.println("* request path: "+instance.getUri() + " host: "+instance.getHost()+" serviceid: "+instance.getServiceId());
System.out.println("********************************************");
return "Eureka-clientone";
}
}
6、先執行服務端，然後在執行此需要註冊的客戶端在控制檯可以見到如下注冊資訊：
7、或者在瀏覽器輸入:http://localhost:1111也可以看到註冊資訊
