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。
服务注册与发现
SpringCloud模块
spring-cloud-starter-eureka-server
工程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) {
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: registerWithEureka: true fetchRegistry: true service-url: defaultZone: http://aa:abcd@localhost:8761/eureka/
代码请移步 Github参考地址
