SpringBoot的服務注冊與發(fā)現(xiàn)示例

更新時間：2017年05月02日 16:59:40 作者：代碼行間的無聊生活

本篇文章主要介紹了SpringBoot的服務注冊與發(fā)現(xiàn)示例,具有一定的參考價值，感興趣的小伙伴們可以參考一下

微服務

實踐“微服務”自然要學習如何做服務注冊與發(fā)現(xiàn)

基于SpringBoot來進行微服務的學習，自然選擇了與之息息相關(guān)的SpringCloud;當然可以選擇其他的技術(shù)進行，比如dubbo

也可以用zookeeper來實現(xiàn)服務注冊與發(fā)現(xiàn)，至于zookeeper來實現(xiàn)此功能好還是不好，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等很多子項目。

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

服務注冊與發(fā)現(xiàn)

SpringCloud模塊

spring-cloud-starter-eureka-server

工程module

服務注冊中心
服務module

服務注冊中心

創(chuàng)建discovery module,并在 build.gradle中引入 spring-cloud-starter-eureka-server依賴

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'
}

通過注解 @EnableEurekaServer 提供注冊中心服務

/**
 * @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屬性

server:
 port: 8761
eureka:
 instance:
  hostname: discovery
 client:
  registerWithEureka: false
  fetchRegistry: false
  service-url:
   defaultZone: http://discovery:${server.port}/eureka/

訪問 http://localhost:8761

服務注冊

創(chuàng)建服務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'
}

通過注解 @EnableDiscoveryClient 進行服務注冊

@SpringBootApplication
@EnableDiscoveryClient
public class ApiGatewayBootcwenaoApplication {
  public static void main(String[] args) {
    SpringApplication.run(ApiGatewayBootcwenaoApplication.class, args);
  }
}

application.yml 配置eureka屬性

server:
 port: 10002
spring:
 application:
  name: apigateway
eureka:
 client:
  registerWithEureka: true
  fetchRegistry: true
  serviceUrl:
   defaultZone: http://localhost:8761/eureka/

注冊完成后，可以通過 spring.application.name 的配置來訪問該服務

訪問 http://localhost:8761 發(fā)現(xiàn)服務已經(jīng)在注冊中心上注冊

服務注冊中心啟用用戶名密碼

通過配置applicaiton.yml用戶名密碼

security:
 basic:
  enabled: true
 user:
  name: aa
  password: abcd

配置服務提供方application.yml

eureka:
 instance:
  hostname: configserver
  prefer-ip-address: true
 client:
  registerWithEureka: true
  fetchRegistry: true
  service-url:
   defaultZone: http://aa:abcd@localhost:8761/eureka/