Spring Cloud 服务治理

参考资料:
Service Discovery: Eureka Clients
Service Discovery: Eureka Server

建议：英语较好者先阅读上面两份资料再查看下面的例子，英语不好者看完下面的例子后最好还是能去看看上面那两份资料

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搭建服务注册中心
maven依赖

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.3.RELEASE</version>
    </parent>

    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
        </dependency>

    </dependencies>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Finchley.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

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spring boot 2.0之前的写法

spring-cloud-starter-eureka-server

spring boot 2.0+ 的写法

spring-cloud-starter-netflix-eureka-server

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application.properties配置文件

eureka.client.register-with-eureka=false
eureka.client.fetch-registry=false

java代码

package com.springcloud.demo;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;

@EnableEurekaServer
@SpringBootApplication
public class Application{

	public static void main(String[] args) {
		SpringApplication.run(Application.class, args);
	}
}

启动项目，在浏览器地址栏中输入http://localhost:8080

到这里服务注册中心已搭建完成

服务提供者需添加如下依赖

<dependencies>
	<dependency>
		<groupId>org.springframework.cloud</groupId>
		<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
	</dependency>
</dependencies>

<dependencyManagement>
	<dependencies>
		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-dependencies</artifactId>
			<version>Finchley.RELEASE</version>
			<type>pom</type>
			<scope>import</scope>
		</dependency>
	</dependencies>
</dependencyManagement>

application.properties属性文件配置

eureka.client.serviceUrl.defaultZone=http://localhost:8080/eureka
spring.application.name=hello-service
server.port=8081

package com.example.demo;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;

@SpringBootApplication
public class DemoApplication {

	public static void main(String[] args) {
		SpringApplication.run(DemoApplication.class, args);
	}
}