总结之SpringCloud之配置中心——config

拼搏现实的明天。 2023-07-24 05:42 34阅读 0赞

## 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`