一:主Maven项目创建
先创建一个maven工程,采用多模块结构,删除多余文件,结构如下:
|_springcloud
|_eureka-client
|_eureka-server
|_pom.xml
主Maven 的 pom.xml 的内容如下:
<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.springcloud</groupId>
<artifactId>springcloud-hx</artifactId>
<version>1.0-SNAPSHOT</version>
<name>springcloud-hx</name>
<description>Demo project for Spring Boot</description>
<packaging>pom</packaging>
<modules>
<module>eureka-client</module>
<module>eureka-server</module>
<module>springcloud-learn</module>
</modules>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.0.RELEASE</version>
<relativePath/>
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
<spring-cloud.version>Greenwich.RELEASE</spring-cloud.version>
</properties>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>${spring-cloud.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<!--供子服务调用的公共依赖-->
<dependencies>
<dependency>
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter-api</artifactId>
<version>RELEASE</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger2</artifactId>
<version>2.6.1</version>
</dependency>
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger-ui</artifactId>
<version>2.6.1</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
<!-- <build>
<plugins>
<!– jdk版本号 –>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.8</source>
<target>1.8</target>
<encoding>UTF-8</encoding>
</configuration>
</plugin>
</plugins>
</build>-->
</project>
二:创建 Eureka Server 服务注册中心
创建完主Maven工程且配置完主工程的 pom.xml 文件后,创建一个 Module 工程,命名为eureka-server。采用Spring Initializr 的方式的方式创建,作为服务注册中心 Eureka Server 的工程。
Eureka Server 的 pom.xml 的内容如下:
<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>com.springcloud</groupId> <!--跟主Maven的一样 -->
<artifactId>springcloud-hx</artifactId> <!--跟主Maven的一样 -->
<version>1.0-SNAPSHOT</version> <!--跟主Maven的一样 -->
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.example</groupId>
<artifactId>eureka-server</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>eureka-server</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<!--eureka-server 的 依赖 -->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
Eureka Server 的 配置文件 application.yml 的内容如下:
server:
port: 8761
eureka:
instance:
prefer-ip-address: true #提交ip信息
status-page-url-path: /actuator/info #信息查询的url link
health-check-url-path: /actuator/health #健康检查的url
hostname: localhost
client:
#在默认情况下,Eureka servce 会向自己注册,这时需要设置registerWithEureka和fetchRegistry 为false,防止自己注册自己
registerWithEureka: false
fetchRegistry: false
#服务注册地址
serviceUrl:
defaultZone:
http://${eureka.instance.hostname}:${server.port}/eureka/
在工程的启动类 EurekaServerApplication 上加上注解 @EnableEurekaServer ,开启Eureka Server的功能,代码如下:
package com.example.eurekaserver;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;
//开启Eureka Server的功能
@EnableEurekaServer
@SpringBootApplication
public class EurekaServerApplication {
public static void main(String[] args) {
SpringApplication.run(EurekaServerApplication.class, args);
}
}
启动项目,在浏览器中访问 http://localhost:8761,页面如下:
在界面上的 Instances currently registered with Eureka 这一项上没有任何注册的实例,没有是正常的,因为还没有Eureka Client 向注册中心Eureka Server 注册实例。
三:创建 Eureka Client
在主Maven工程中创建一个新的 Module 工程,命名为eureka-client。采用Spring Initializr 的方式的方式创建,该工程作为Eureka Client 向服务注册中心Eureka Server 注册。
Eureka Client 的 pom.xml 的内容如下:
<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>com.springcloud</groupId> <!--跟主Maven的一样 -->
<artifactId>springcloud-hx</artifactId> <!--跟主Maven的一样 -->
<version>1.0-SNAPSHOT</version> <!--跟主Maven的一样 -->
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.example</groupId>
<artifactId>eureka-client</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>eureka-client</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<!--eureka-client的 依赖 -->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>
<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>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
Eureka Clent 的 配置文件 application.yml 的内容如下:
server:
port: 8762
spring:
#配置程序名为eureka-client
application:
name: eureka-client
eureka:
client:
#服务注册地址
serviceUrl:
#注意: Eureka Server 的注册地址
defaultZone: http://localhost:8761/eureka/
在工程的启动类 EurekaClientApplication上加上注解 @EnableDiscoveryClient,开启服务注册于发现,代码如下:
package com.example.eurekaclient;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
//开启服务注册于发现
@EnableDiscoveryClient
@SpringBootApplication
public class EurekaClientApplication {
public static void main(String[] args) {
SpringApplication.run(EurekaClientApplication.class, args);
}
}
启动项目,在浏览器中访问 http://localhost:8761,页面如下:
在界面上的 Instances currently registered with Eureka 这一项上已经有一个实例被注册,APPLICATION 为 EUREKA-CLIENT, Status为 UP(上线),端口为8762.这就说明Eureka Client 已成功向 Eureka Server 注册。