網址：https://github.com/

配置中心

原理：

github上的配置，名為School-dev.yml

spring:
  application:
    name: userClient
  datasource:
    driver-class-name: com.mysql.jdbc.Driver
    url: jdbc:mysql://192.168.0.250/school
    username: root
    password: ps123456
server: 
  port: 80
eureka:
  instance:
    hostname:
 
 localhost
    #註冊到註冊中心的微服務都是IP地址
    preferIpAddress: true
  client:
    #是否註冊到註冊中心
    registerWithEureka: true
    #是否抓取註冊中心的註冊資訊
    fetchRegistry: true
    serviceUrl:
      #微服務和客戶端用來註冊和發現的地址,此處為linux虛擬機器執行地址
      defaultZone: http://192.168.174.129:8761/eureka/

application.yml 配置中心服務引用github倉庫(自己建立的)

spring:
  cloud:
    config:
      server:
        git:
          uri: https://github.com/qq1073674233/ConfigCenter  #github路徑
server:
  port: 8888 #不指定埠，預設為8080

###配置中心依賴

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

讀取資源的兩種型別均可:yml,properties

URL:http://localhost:8888/School-dev.yml
URL:http://localhost:8888/School-dev.properties

application.name錯誤

spring:
application:
name: Schoo
github上名字為：School-dev.yml
應為 School

    2018-12-04 00:11:23.183  WARN 7804 --- [  restartedMain] ationConfigEmbeddedWebApplicationContext :
    Exception encountered during context initialization - cancelling refresh attempt: 
    org.springframework.beans.factory.UnsatisfiedDependencyException: 
    Error creating bean with name 'inMemoryDatabaseShutdownExecutor' defined in class path resource 
    [org/springframework/boot/devtools/autoconfigure/DevToolsDataSourceAutoConfiguration.class]:
    Unsatisfied dependency expressed through method 'inMemoryDatabaseShutdownExecutor' parameter 0;
    nested exception is org.springframework.beans.factory.BeanCreationException:
    Error creating bean with name 'dataSource' defined in class path resource 

錯誤：服務啟動時間早於註冊中心

Cannot execute request on any known server

2018-12-04 08:11:31.965  WARN 5796 --- [nfoReplicator-0] com.netflix.discovery.DiscoveryClient: 
DiscoveryClient_USERSERVICE/OuYang:userService:8881 - registration failed Cannot execute request on any known server
com.netflix.discovery.shared.transport.TransportException: Cannot execute request on any known server

預設訪問方式：http://localhost:8888/School/dev，讀取的是properties格式

微服務啟動前配置bootstrap.yml

#註冊中心的位置在IP和埠
spring:
  application:
    name: School #github已定義的專案名
  profiles:
    active: dev  #github已定義的名字，推薦：開發環境dev,測試環境test,生產環境，gene
  cloud:
    config:
      uri: http://localhost:8888
#該檔案等同於http://localhost:8888/School-dev.yml
#此檔案需新增spring-cloud-starter-config依賴才會讀取

讀取bootstrap.yml檔案的依賴

<dependency>  <!--此依賴才可讀取配置資源bootstrap.yml-->
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-config</artifactId>
</dependency>

main類添加註解 @EnableConfigServer

異常：loc header execption 一定是jar包損壞

zuul

路由配置application.yml , 均衡配置客戶端，程式訪問的入口

spring:
  application:
    name: zuul
server:
  port: 80
eureka:
  instance:
    hostname: localhost
    #註冊到註冊中心的微服務都是IP地址
    preferIpAddress: true
  client:
    #是否註冊到註冊中心
    registerWithEureka: false
    #是否抓取註冊中心的註冊資訊
    fetchRegistry: true
    serviceUrl:
      #微服務和客戶端用來註冊和發現的地址
      defaultZone: http://192.168.174.129:8761/eureka/

訪問地址，服務名為全小寫userClient→userclient

http://localhost/userclient/userList.html