总结之SpringCloud之配置中心—

config简介

Spring Cloud Config 支持服务端与客户端
是一个分布式配置中心
提供配置信息多环境切换
配置信息更新，实时同步

实现步骤

GitHub创建存放配置信息的config-repository目录与配置信息config-client-dev.properties、config-another-client-test.properties，可通过demo中的config-repository模块关联GitHub上的配置。
实现config-server：关键是启动Spring Cloud Config Server功能，指定配置仓库的配置信息
实现config-client：从配置仓库读取配置信息
实现config-repository：放置配置信息

config-server

config-server实现步骤

pom.xml引入spring-cloud-config-server
application.yml指定配置仓库连接信息
启动类使用注解启动类使用注解@EnableConfigServer开启配置服务功能

<dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-config-server</artifactId>
        </dependency>
spring:
  application:
    name: config-server
  cloud:
    config:
      server:
        git:
          uri: https://github.com/000000/config
          searchPaths: config-repository
          username:000000
          password:000000
      label: dev-20180827

启动项

mport org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.config.server.EnableConfigServer;
@EnableConfigServer
@SpringBootApplication
public class ConfigServerApplication {
    public static void main(String[] args) {
        SpringApplication.run(ConfigServerApplication.class, args);
    }
}

config-client

实现步骤

pom.xml文件中引入依赖spring-cloud-starter-config
bootstrap.yml中指定Config Server连接信息以及需要访问配置中心的具体配置信息
ConfigClientApplication常规Spring Boot启动类

spring:
application:

name: config-client

cloud:

config:
  label: dev-20180827
  profile: dev
  uri: http://localhost:8769/

server:
port: 8771

config-repository

保存的配置文件，把它上传到github中
如下：

#\u670d\u52a1\u540d
cloud.application.name=spring-cloud-op-data-service
#\u670d\u52a1\u7aef\u53e3
spring.server.port=8884
#\u6570\u636e\u5e93\u914d\u7f6e
spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://127.0.0.1:3306/paascloud_uac?characterEncoding=UTF-8&autoReconnect=true&useUnicode=true&useSSL=false
spring.datasource.username=root
spring.datasource.password=123456
#spring.datasource.publickey=MFwwDQYJKoZIhvcNAQEBBQADSwAwSAJBAKhMXHchtHKmZGRlf1e5290MJ8DFDkQ/D+sgdxX5JNe4njexg07TZivfsOKl1leFEoPH5KVnfKDmA3sljNIrE6MCAwEAAQ==
spring.datasource.initialSize=5
spring.datasource.minIdle=5
spring.datasource.maxActive=20
spring.datasource.maxWait=60000
spring.datasource.timeBetweenEvictionRunsMillis=60000
spring.datasource.minEvictableIdleTimeMillis=300000
spring.datasource.validationQuery=SELECT 1 FROM DUAL
spring.datasource.testWhileIdle=true
spring.datasource.testOnBorrow=false
spring.datasource.testOnReturn=false
spring.datasource.poolPreparedStatements=true
spring.datasource.maxOpenPreparedStatements=20
spring.datasource.maxPoolPreparedStatementPerConnectionSize=20
#spring.datasource.filters=stat,wall,log4j,config
#spring.datasource.connectionProperties=druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000;config.decrypt=true;config.decrypt.key=${spring.datasource.publickey}
spring.enable.swagger=true 
#sop
spring.swagger.host = 10.237.55.148
#Hystrix timeout config
hystrix.command.default.execution.timeout.enabled=true
#\u4e3a\u4e86\u6d4b\u8bd5Hystrix\u7684fallback\u6548\u679c\uff0c\u6b64\u5904\u5c06\u8d85\u65f6\u65f6\u95f4\u8bbe\u7f6e\u62101\u6beb\u79d2
hystrix.command.default.execution.isolation.thread.timeoutInMilliseconds=100000
##\u5e76\u53d1\u6267\u884c\u7684\u6700\u5927\u7ebf\u7a0b\u6570\uff0c\u9ed8\u8ba410
hystrix.threadpool.default.coreSize=coreSize
##BlockingQueue\u7684\u6700\u5927\u961f\u5217\u6570
hystrix.threadpool.default.maxQueueSize=1000
##\u5373\u4f7fmaxQueueSize\u6ca1\u6709\u8fbe\u5230\uff0c\u8fbe\u5230queueSizeRejectionThreshold\u8be5\u503c\u540e\uff0c\u8bf7\u6c42\u4e5f\u4f1a\u88ab\u62d2\u7edd
hystrix.threadpool.default.queueSizeRejectionThreshold=500
hystrix.command.default.circuitBreaker.requestVolumeThreshold=400
lock.mysql.expireTime=7200000
#redis cluster
spring.redis.hostName=10.237.55.188
spring.redis.port=6379
spring.redis.password=
spring.redis.pool.maxActive=8  
#spring.redis.pool.maxWait=-1  
spring.redis.pool.maxIdle=8  
spring.redis.pool.minIdle=0  
#spring.redis.timeout=0
#spring.redis.pool.maxTotal=200
#spring.redis.pool.maxActive=300
spring.redis.pool.maxWaitMillis=10000
redis.sale.saleDatabase=1
redis.normal.normalDatabase=0

服务端通过@Value可以去查看远程配置文件信息

@Value("${xxxx}")
    private String xxxx;

如何读取远程配置的

启动之后可以根据指定规则访问远程配置完整信息，/{name}/{profile}/{label}
name：spring.application.name
profile：spring.application.profile，即 application-{profile}.yml中的profile值，如application-dev.yml文件的profile是dev。
label：application.yml配置文件中spring.cloud.config.label的值，这里是dev
查看config-client的bootstrap.properties信息可知，其对应的远程配置文件为https://github.com/000000/config-repository/config-client-dev.properties