1. 注册中心eureka

1.1 eureka server

1，引入pom依赖

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

2，启动类上加@EnableEurekaServer注解

@SpringCloudApplication
@EnableEurekaServer //启动一个服务注册中心提供给其他应用进行对话
public class Application {

    public static void main(String[] args) {
        //new SpringApplicationBuilder(ServiceRegistryApplication.class).web(true).run(args);
        SpringApplication.run(Application.class, args);
    }

}

3，加上properties配置

spring:
  application:
    name: scfl-eureka-server
#---------------------------------------------------------------------    
server:
  port: 50000
#---------------------------------------------------------------------
eureka:
  instance:
    prefer-ip-address: true
    status-page-url-path: /actuator/info #eureka注册中心的url link
    health-check-url-path: /actuator/health #健康检查的url
    hostname: localhost
  client:
    register-with-eureka: true #是否注册到注册中心
    fetch-registry: false #是否从注册中心拉取注册服务列表
    service-url:
      defaultZone: http://localhost:50000/eureka/

1.2 eureka client

1，引入pom依赖

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

2，启动类上加@EnableDiscoveryClient注解

@SpringCloudApplication已经包含@EnableDiscoveryClient注解

@SpringCloudApplication
public class Application {

    public static void main(String[] args) {
        //new SpringApplicationBuilder(ServiceRegistryApplication.class).web(true).run(args);
        SpringApplication.run(Application.class, args);
    }

}

3，加上properties配置

spring:
  application:
    name: scfl-comm-jdbc

server:
  port: 50001
  servlet:
    context-path: /jdbc

eureka:
  instance:
    prefer-ip-address: true
    status-page-url-path: /actuator/info
    health-check-url-path: /actuator/health
  client:
    register-with-eureka: true
    fetch-registry: true
    service-url:
      defaultZone: http://localhost:50000/eureka/

2. 配置中心config

2.1 config server

1，引入pom依赖

<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-config-server</artifactId>
</dependency>

2，启动类上加@EnableConfigServer注解

@SpringCloudApplication
@EnableConfigServer
public class Application {

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

}

3，加上properties配置,可以从local，git，svn取配置文件

git

spring.cloud.config.server.git.uri=http://git.oschina.net/didispace/SpringCloud-Learning/
spring.cloud.config.server.git.searchPaths=Chapter1-1-8/config-repo
spring.cloud.config.server.git.username=username
spring.cloud.config.server.git.password=password

本地

#Config Server会默认从应用的src/main/resource目录下检索配置文件
spring.profiles.active=native
#指定配置文件的位置
spring.cloud.config.server.native.searchLocations=file:F:/properties/

2.2 config client

1，引入pom依赖

<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-config</artifactId>
</dependency>

2，不需要单独的启动注解

3，加上properties配置

通过config server的service id来去配置

spring.cloud.config.name=${spring.application.name},db,redis,rabbitmq
#spring.cloud.config.profile=${spring.profiles.active}

#spring.cloud.config.uri=http://localhost:7001/
spring.cloud.config.discovery.enabled=true
spring.cloud.config.discovery.serviceId=config-server

eureka.client.serviceUrl.defaultZone=http://localhost:1111/eureka/

配置文件加载顺序，先加载配置中心的{name}-{profile}.yml,再加载本项目的application.yml，如果遇到重名的key，会以第一个为准。

3. 配置文件动态刷新bus

1，引入pom依赖

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-bus-amqp</artifactId>
</dependency>

spring-boot-starter-actuator包含刷新端点
spring-cloud-starter-bus-amqp可以通过rabbitmq通知所有config client重新获取配置文件

2，不需要单独的启动注解

3，加上properties配置

#开启端点以及跨域,默认web只开启了health和info
management:
  endpoints:
    web:
      exposure: 
        include: "*"
      cors:
        allowed-origins: "*"
        allowed-methods: "*"

4，通过curl -X POST http://ip:port/context-path//actuator/bus-refresh来动态重新获取配置文件内容即可

5，bus流程图

4. spring cloud常用的starter

Name	Description
spring-cloud-starter-config	config客户端
spring-cloud-config-server	@EnableConfigServer
spring-cloud-starter-bus-amqp	/bus/refresh
spring-cloud-starter-bus-kafka	/bus/refresh
spring-cloud-starter-netflix-eureka-client	eureka-client
spring-cloud-starter-netflix-eureka-server	@EnableEurekaServer eureka-server
spring-cloud-starter-netflix-hystrix	@EnableCircuitBreaker hystrix
spring-cloud-starter-netflix-hystrix-dashboard	@EnableHystrixDashboard /hystrix
spring-cloud-starter-netflix-turbine	@EnableTurbine
spring-cloud-starter-netflix-ribbon	.ribbon.*
spring-cloud-starter-netflix-zuul	zuul
spring-cloud-starter-openfeign	@EnableFeignClients @FeignClient(“stores”)
spring-cloud-starter-sleuth	sleuth
spring-cloud-starter-zipkin	zipkin
pring-cloud-starter-gateway	gateway