springcloud实战之10 分布式配置中心（config）

傷城~ 2022-06-03 01:43 177阅读 0赞

基于为服务群，如果为每个服务读取自己的配置文件，有点重复造轮子。spingcloud提供了一个git远程仓库来创建分布式配置中心。

## 构建Config Server ##

创建一个springcloud-server-config项目

### 添加依赖 ###

<parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.9.RELEASE</version>
        <relativePath />
    </parent>
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Edgware.RELEASE</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-eureka</artifactId>
        </dependency>
    </dependencies>

### 添加配置文件 ###

新建application.yml

server:
      port: 8001
    
    spring:
      application:
        name: springcloud-server-config
      cloud:
        config:
          server:
            git:
              uri: https://github.com/shiyuan2he/springcloud
              search-paths: springcloud-repo-config ## 配置仓库路径下的相对搜索位置，可以配置多个
              username:
              password:
          label: master
    
    eureka:
      client:
        service-url:
          defaultZone: http://peer1:8080/eureka/

### 添加入口类 ###

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

Server config已经配置完成

## 构建Config Client ##

### 添加依赖 ###

<parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.9.RELEASE</version>
        <relativePath />
    </parent>
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Edgware.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-config</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-eureka</artifactId>
        </dependency>
    </dependencies>

### 添加配置文件 ###

新建bootstrap.properties

spring.application.name=springcloud-service-config
    spring.cloud.config.label=master
    spring.cloud.config.profile=dev
    spring.cloud.config.uri= http://localhost:8001/
    server.port=8002
    
    eureka.client.serviceUrl.defaultZone=http://peer1:8080/eureka/
    ## 从配置中心读取文件
    spring.cloud.config.discovery.enabled=true
    ## 配置中心的servieId，即服务名。
    spring.cloud.config.discovery.serviceId=springcloud-config-server

### 创建入口类 ###

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

### 创建web层接口 ###

@RestController
    @RequestMapping(value = "/api/rest")
    public class RestfulController { 
    
        @Value("${user.name}")
        String name;
        @Value("${user.age}")
        String age ;
    
        @GetMapping("/name")
        public String getName(){
            return name +":"+ age;
        }
    }

### 构建仓库 ###

在[仓库][Link 1]下新建配置文件springcloud-service-config-dev.properties

内容：

user.name=hehe
    user.age=18

### 启动项目 ###

启动springcloud-service-config项目

## 测试项目 ##

调用[http://localhost:8002/api/rest/name][http_localhost_8002_api_rest_name]

效果图：  
![这里写图片描述][SouthEast]

[Link 1]: https://github.com/shiyuan2he/springcloud/tree/master/springcloud-config-repo
[http_localhost_8002_api_rest_name]: http://localhost:8002/api/rest/name
[SouthEast]: /images/20220603/d9c9672a3aad430c997b91505502bbf4.png