SpringCloud：分布式配置中心——Spring Cloud Config

爱被打了一巴掌 2022-04-23 05:00 252阅读 0赞

一，Spring Cloud Config

Spring Cloud Config是Spring Cloud体系内部提供的分布式配置中心，用来进行配置信息统一处理。分布式配置中心整体流程如下图，用户推送配置信息到GIT/SVN版本控制中心，创建Config Server服务专门从GIT/SVN上获取配置文件到缓存中，Config Client客户端从Config Server读取配置信息进行项目信息配置；当GIT/SVN上配置文件发生变化时，可以在客户端通过Actuator进行手动刷新或者通过Spring Cloud Bus消息总线进行自动刷新处理（本文演示通过Actuator手动刷新处理）

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二，在GIT上创建配置中心仓库，并添加配置信息，如下图；此处需要注意，文件前缀必须与客户端服务的ApplicationName一致

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTE5NzYzODg_size_16_color_FFFFFF_t_70 1][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTE5NzYzODg_size_16_color_FFFFFF_t_70 2][]

三，整体服务架构

\* 使用Eureka注册中心进行服务注册，Eureka服务搭建参考之前的博文

![20190123224551383.png][]

四，Config Server端服务搭建

maven依赖

<parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.1.RELEASE</version>
      </parent>
      
      <dependencyManagement>
        <dependencies>
          <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-dependencies</artifactId>
            <version>Finchley.M7</version>
            <type>pom</type>
            <scope>import</scope>
          </dependency>
        </dependencies>
      </dependencyManagement>
      <dependencies>
        
        <dependency>
          <groupId>org.springframework.cloud</groupId>
          <artifactId>spring-cloud-config-server</artifactId>
        </dependency>
        
        <dependency>
          <groupId>org.springframework.cloud</groupId>
          <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>
    
      </dependencies>
      
      <repositories>
        <repository>
          <id>spring-milestones</id>
          <name>Spring Milestones</name>
          <url>https://repo.spring.io/libs-milestone</url>
          <snapshots>
            <enabled>false</enabled>
          </snapshots>
        </repository>
      </repositories>

1，配置文件 -- application.yml

###服务注册到eureka地址
    eureka:
      client:
        service-url:
               defaultZone: http://localhost:8000/eureka
    spring:
      application:
        ####注册中心应用名称
        name: server-config
      cloud:
        config:
          server:
            git:
              ###git环境地址
              uri: https://github.com/zpj0427/spring-cloud-config.git
              ####搜索目录
              search-paths:
                -
          ####读取分支
          label: master
    ####端口号
    server:
      port: 8100

2，启动类

package com.gupao;
    
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.cloud.config.server.EnableConfigServer;
    import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
    
    @SpringBootApplication
    @EnableEurekaClient
    // 开启分布式配置服务
    @EnableConfigServer
    public class SpringCloudConfigServerApp {
        public static void main( String[] args ) {
            SpringApplication.run(SpringCloudConfigServerApp.class, args);
        }
    }

3，访问路径：[http://localhost:8100/member-config-dev.properties][http_localhost_8100_member-config-dev.properties]

![20190123224820347.png][]

五，Config Client端搭建

maven依赖

<parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.1.RELEASE</version>
      </parent>
      
      <dependencyManagement>
        <dependencies>
          <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-dependencies</artifactId>
            <version>Finchley.M7</version>
            <type>pom</type>
            <scope>import</scope>
          </dependency>
    
        </dependencies>
      </dependencyManagement>
      <dependencies>
        
        <dependency>
          <groupId>org.springframework.boot</groupId>
          <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
          <groupId>org.springframework.cloud</groupId>
          <artifactId>spring-cloud-config-client</artifactId>
        </dependency>
        
        <dependency>
          <groupId>org.springframework.cloud</groupId>
          <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>
        
        <dependency>
          <groupId>org.springframework.boot</groupId>
          <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
      </dependencies>
      
      <repositories>
        <repository>
          <id>spring-milestones</id>
          <name>Spring Milestones</name>
          <url>https://repo.spring.io/libs-milestone</url>
          <snapshots>
            <enabled>false</enabled>
          </snapshots>
        </repository>
      </repositories>

1，注意：Config Client端服务名称必须为member-config，与配置文件前缀一致

2，配置文件 -- bootstrap.yml（此处application.yml调用不通）

spring:
      application:
        ####注册中心应用名称
        name: member-config
      cloud:
        config:
        ####读取后缀
          profile: dev
          ####读取config-server注册地址
          discovery:
            service-id: server-config
            enabled: true
    #####    eureka服务注册地址
    eureka:
      client:
        service-url:
               defaultZone: http://localhost:8000/eureka
    server:
      port: 8300
    ### 启动actuator所有监控节点
    management:
      endpoints:
        web:
          exposure:
            include: "*"

3，配置文件信息获取

package com.gupao.config.controller;
    
    import org.springframework.beans.factory.annotation.Value;
    import org.springframework.cloud.context.config.annotation.RefreshScope;
    import org.springframework.web.bind.annotation.PostMapping;
    import org.springframework.web.bind.annotation.RestController;
    
    /**
     * @author pj_zhang
     * @create 2019-01-23 21:46
     **/
    @RestController
    // 通过调用接口刷新配置中心配置文件，需要添加该注解进行识别
    @RefreshScope
    public class ConfigController {
    
        @Value("${spring-cloud-member-config}")
        private String configValue;
    
        @PostMapping("/getConfig")
        public String getConfig() {
            return configValue;
        }
    
    }

4，服务启动类

package com.gupao;
    
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
    
    @SpringBootApplication
    @EnableEurekaClient
    public class SpringCloudConfigClientApp {
        public static void main( String[] args ) {
            SpringApplication.run(SpringCloudConfigClientApp.class, args);
        }
    }

5，服务访问

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTE5NzYzODg_size_16_color_FFFFFF_t_70 3][]

六，配置信息更改

1，从git端修改配置信息

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTE5NzYzODg_size_16_color_FFFFFF_t_70 4][]

2，直接从服务端读取文件，如下图，文件信息修改成功

![20190123225543149.png][]

3，先从客户端读取文件，如下图，配置信息未发生变更

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTE5NzYzODg_size_16_color_FFFFFF_t_70 5][]

4，调用Actuator提供的/actuator/fresh接口刷新信息；如下图，刷新完成后，存在文件信息变更

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTE5NzYzODg_size_16_color_FFFFFF_t_70 6][]

5，重新读取配置新，如下图，配置信息已经更新

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTE5NzYzODg_size_16_color_FFFFFF_t_70 7][]

多环境变更不演示了，就这样吧，太TM卡了。。。

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTE5NzYzODg_size_16_color_FFFFFF_t_70]: /images/20220323/ecc839e24d7c4e39a3d09b732c56f585.png
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[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTE5NzYzODg_size_16_color_FFFFFF_t_70 2]: /images/20220323/994aa0d178be47bab72c4d2e4402793f.png
[20190123224551383.png]: /images/20220323/1486d7b9b5a24a5bb5116d11e3ddf8e9.png
[http_localhost_8100_member-config-dev.properties]: http://localhost:8100/member-config-dev.properties
[20190123224820347.png]: /images/20220323/8cfaaf2957f54eaab5ea582c5746e2ef.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTE5NzYzODg_size_16_color_FFFFFF_t_70 3]: /images/20220323/8f15c9a0cf864dc0876fe22f959027b9.png
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[20190123225543149.png]: /images/20220323/20f99b8f3e674b9e8571b76a8f2937b8.png
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