Springcloud-Config配置中心

ゝ一世哀愁。 2023-02-24 14:26 25阅读 0赞

## Config配置中心介绍 ##

[官网][Link 1]

> 通过全局的配置中心，来统一管理零散的微服务，使配置一处修改处处生效  
> 配置中心分为：服务端和客户端架构如下。

### 系统级配置和用户级配置 ###

> 创建bootstrap.yml为系统级配置  
> 创建application.yml为用户级别配置  
> 系统级别的配置优先级更高

### 配置流程 ###

> 1.在github上创建仓库–例如springcloud-config  
> 2.在仓库添加yml文件，例如config-dev.yml这里的命名规范必须加-号  
> 3.创建服务端配置  
> 4.在客户端配置

## 服务器端配置 ##

### pom配置 ###

<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>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-web</artifactId>
            </dependency>
    
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-actuator</artifactId>
            </dependency>
    
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-devtools</artifactId>
                <scope>runtime</scope>
                <optional>true</optional>
            </dependency>
    
            <dependency>
                <groupId>org.projectlombok</groupId>
                <artifactId>lombok</artifactId>
                <optional>true</optional>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-test</artifactId>
                <scope>test</scope>
            </dependency>
        </dependencies>

### yml配置 ###

server:
      port: 3344
    spring:
      application:
        name: cloud-config-center
      cloud:
        config:
          server:
            git:
              uri:  git@github.com:paulfuke/springcloud-config.git          # github的地址
              search-paths:
                - springcloud-config # github仓库名称
          label: master  #分支
          # 访问方式见文档
    eureka:
      client:
        service-url:
          defaultZone:  http://localhost:7001/eureka

### 启动类 ###

@SpringBootApplication
    @EnableConfigServer
    public class ConfigMain3344 { 
        public static void main(String[] args) { 
            SpringApplication.run(ConfigMain3344.class,args);
        }
    }

### 核心代码 ###

暂无

### url访问方式（5种） ###

推荐第三种

> 域名:端口号/github分支名/应用名/文件.yml  
> 例如范文springcloud-config仓库的master分支下的config-dev.yml就是localhost:端口号/master/config-dev.yml

/{application}/{profile}[/{label}]
    /{application}-{profile}.yml
    /{label}/{application}-{profile}.yml
    /{application}-{profile}.properties
    /{label}/{application}-{profile}.properties

## 客户端配置 ##

### pom配置 ###

<dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-config</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-web</artifactId>
            </dependency>
    
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-actuator</artifactId>
            </dependency>
    
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-devtools</artifactId>
                <scope>runtime</scope>
                <optional>true</optional>
            </dependency>
    
            <dependency>
                <groupId>org.projectlombok</groupId>
                <artifactId>lombok</artifactId>
                <optional>true</optional>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-test</artifactId>
                <scope>test</scope>
            </dependency>
        </dependencies>

### yml配置 ###

server:
      port: 3355
    spring:
      application:
        name: config-client
      cloud:
        config:
          label: master #分支名
          name: config #application名称
          profile: dev #profile名称 综合就是根据url进行访问github上的master/config-dev.yml
          uri: http://localhost:3344
    eureka:
      client:
        service-url:
          defaultZone: http://eureka7001.com:7001/eureka
    management:
      endpoints:
        web:
          exposure:
            include: "*"

### 启动类 ###

@SpringBootApplication
    @EnableEurekaClient
    public class ConfigClientMain3355 { 
        public static void main(String[] args) { 
            SpringApplication.run(ConfigClientMain3355.class, args);
        }
    }

### 核心代码 ###

@RestController
    @RequestMapping("/config")
    @RefreshScope
    public class ConfigClientController { 
        @Value("${config.info}")
        public String configInfo;
    
        @GetMapping("/info")
        public String configInfo(){ 
            return configInfo;
        }
    }

## config动态刷新 ##

> 注意：当github上的配置改变的时候服务端当下次请求时会立刻发生变化，但是客户端不会变化，客户端需要重启服务才能改变，如何做到动态刷新呢？

1.在yml中加入

management:
      endpoints:
        web:
          exposure:
            include: "*"

2.在controller上加入

@RefreshScope

3.发送post请求告诉客户端刷新一下

http://localhost:3355/actuator/refresh

### 存在的问题 ###

> 此时动态刷新需要一条条的执行，如何方便快捷的进行消息发送，需要用到BUS消息总线

[bus学习博客][bus]

[Link 1]: https://cloud.spring.io/spring-cloud-static/spring-cloud-config/2.2.1.RELEASE/reference/html/
[bus]: https://blog.csdn.net/weixin_44467251/article/details/107302231