SpringBoot的服务注册与发现示例

SpringBoot的服务注册与发现示例

微服务

实践“微服务”自然要学习如何做服务注册与发现

基于SpringBoot来进行微服务的学习，自然选择了与之息息相关的SpringCloud;当然可以选择其他的技术进行，比如dubbo

也可以用zookeeper来实现服务注册与发现，至于zookeeper来实现此功能好还是不好，各家之言都有

SpringCloud

Spring Cloud provides tools for developers to quickly build some of the common patterns in distributed systems .SpringCloud

SpringCloud 包含了 Distributed/versioned configuration、Distributed/versioned configuration等很多子项目。

Distributed/versioned configuration

Service registration and discovery

Routing

Service-to-service calls

Load balancing

Circuit Breakers

Global locks

Leadership election and cluster state

Distributed messaging

服务注册与发现

SpringCloud模块

spring-cloud-starter-eureka-server

工程module

服务注册中心

服务module

服务注册中心

创建discovery module,并在 build.gradle中引入 spring-cloud-starter-eureka-server依赖

apply plugin: 'org.springframework.boot'

dependencyManagement {

imports {

mavenBom "org.springframework.cloud:spring-cloud-dependencies:"+ springCloudVersion

}

}

repositories {

mavenCentral()

}

dependencies {

compile ('org.springframework.cloud:spring-cloud-starter-eureka-server')

}

jar {

baseName = 'discovery-bootcwenao'

}

通过注解 @EnableEurekaServer 提供注册中心服务

/**

* @author cwenao

* @version $Id DiscoveryBootcwenaoApplication.java, v 0.1 2017-01-12 9:56 cwenao Exp $$

*/

@EnableEurekaServer

@SpringBootApplication

public class DiscoveryBootcwenaoApplication {

public static void main(String[] args) {

new SpringApplicationBuilder(DiscoveryBootcwenaoApplication.class).web(true).run(args);

}

}

application.yml 配置eureka属性

server:

port: 8761

eureka:

instance:

hostname: discovery

client:

registerWithEureka: false

fetchRegistry: false

service-url:

defaultZone: http://discovery:${server.port}/eureka/

访问 http://localhost:8761

服务注册

创建服务module, 在build.gradle中引入 spring-cloud-starter-eureka

apply plugin: 'org.springframework.boot'

dependencyManagement {

imports {

mavenBom "org.springframework.cloud:spring-cloud-dependencies:"+ springCloudVersion

}

}

dependencies {

compile('org.springframework.cloud:spring-cloud-starter-eureka')

compile('org.springframework.cloud:spring-cloud-stream')

}

sourceSets {

main {

resources.srcDirs = ['src/main/resources', 'src/main/java']

resources.includes = ['**/*.xml', '**/*.yml']

}

}

jar {

baseName = 'apigateway-bootcwenao'

}

通过注解 @EnableDiscoveryClient 进行服务注册

@SpringBootApplication

@EnableDiscoveryClient

public class ApiGatewayBootcwenaoApplication {

public static void main(String[] args)http:// {

SpringApplication.run(ApiGatewayBootcwenaoApplication.class, args);

}

}

application.yml 配置eureka属性

server:

port: 10002

spring:

application:

name: apigateway

eureka:

client:

registerWithEureka: true

fetchRegistry: true

serviceUrl:

defaultZone: http://localhost:8761/eureka/

注册完成后，可以通过 spring.application.name 的配置来访问该服务

访问 http://localhost:8761 发现服务已经在注册中心上注册

服务注册中心启用用户名密码

通过配置applicaiton.yml用户名密码

security:

basic:

enabled: true

user:

name: aa

password: abcd

配置服务提供方application.yml

eureka:

instance:

hostname: configserver

prefer-ip-address: true

client:

regihttp://sterWithEureka: true

fetchRegistry: true

service-url:

defaultZone: http://aa:abcd@localhost:8761/eureka/

代码请移步 github参考地址

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