Spring-Cloud之Eureka排坑之旅

1 快速demo

1.0 环境说明

Intelli IDEA+Spring Boot

1.1 新建工程chap52（通过New Project->Spring Initializer->web）

修改pom文件：

<groupId>com.chen4du</groupId>

<artifactId>chap52</artifactId>

<version>0.0.1-SNAPSHOT</version>

<packaging>pom</packaging>

<name>chap52</name>

<description>Demo project for Spring Boot</description>

<parent>

	<groupId>org.springframework.boot</groupId>

	<artifactId>spring-boot-starter-parent</artifactId>

	<version>1.5.2.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>

	<spring-cloud.version>Dalston.SR1</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>

1.2 新建module：eurekaserver（通过New Project->Spring Initializer->web），修改pom文件

<parent>

	<groupId>com.chen4du</groupId>

	<artifactId>chap52</artifactId>

	<version>0.0.1-SNAPSHOT</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.cloud</groupId>

		<artifactId>spring-cloud-starter-eureka-server</artifactId>

	</dependency>

	<dependency>

		<groupId>org.springframework.boot</groupId>

		<artifactId>spring-boot-starter-test</artifactId>

		<scope>test</scope>

	</dependency>

</dependencies>

添加application.yml文件

server:

  port: 8761

eureka:

  instance:

hostname: localhost

  client:

	registerWithEureka: false

	fetchRegistry: false

	serviceUrl:

  		defaultZone:

			http://${eureka.instance.hostname}:${server.port}/eureka/

为EurekaserverApplication文件添加注解

@EnableEurekaServer

@SpringBootApplication

public class EurekaserverApplication {

	public static void main(String[] args) {

		SpringApplication.run(EurekaserverApplication.class, args);

	}

}

1.3 新建module：eurekaclient（通过New Project->Spring Initializer->web），修改pom文件

<parent>

	<groupId>com.chen4du</groupId>

	<artifactId>chap52</artifactId>

	<version>0.0.1-SNAPSHOT</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.cloud</groupId>

		<artifactId>spring-cloud-starter-eureka</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>

添加文件bootstrap.yml

eureka:

 	client:

		serviceUrl:

  			defaultZopne: http://localhost:8761/eureka/

server:

  	port: 8762

spring:

  	application:

		name: eureka-client

为EurekaclientApplication添加注解

@SpringBootApplication

@EnableEurekaClient

public class EurekaclientApplication {

	public static void main(String[] args) {

		SpringApplication.run(EurekaclientApplication.class, args);

	}

}

1.4 调试

运行EurekaserverApplication，访问http:localhost:8761

运行EurekaclientApplication，访问http:localhost:8761 可以看到服务已注册

2 排坑之旅

2.1 注解添加无效

开始以为是包之间冲突，各种调版本，后来发现是因为chap52的pom文件中打包方式有误，默认是jar，要改成pom，后续子模块才能依赖到父模块的包

2.2 yml文件格式

注意value和key之间有个空格，勿丢。

巴特西