SpringCloud系列十四：Config-基本使用

た入场券 2022-02-05 03:11 331阅读 0赞

一、配置文件托管到GitLab  
1、新建文件夹springcloud-config  
2、在文件夹下新建配置文件application.yml

spring:
      profiles:
        active: 
        - dev
    ---
    spring:
      profiles: dev   #开发环境
      application:
        name: springcloud-config-atguigu-dev
    ---
    spring:
      profiles: test   #测试环境
      application:
        name: springcloud-config-atguigu-test
    #必须保存为UTF-8格式

3、在文件夹下新建配置文件springcloud-config-client.yml

spring:
      profiles:
        active: 
        - dev
    ---
    server:
      port: 8201
    spring:
      profiles: dev  
      application:
        name: springcloud-config-client
    eureka:
      client:
        service-url: 
          defaultZone: http://eureka-dev.com:7001/eureka/
    ---
    server:
      port: 8202
    spring:
      profiles: test  
      application:
        name: springcloud-config-client
    eureka:
      client:
        service-url: 
          defaultZone: http://eureka-test.com:7001/eureka/
    #必须保存为UTF-8格式

4、推送到GitLab上  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpemhpcWlhbmcxMjE3_size_16_color_FFFFFF_t_70]  
二、配置中心服务端  
1、新建配置中心服务端microservicecloud-config-3344工程  
2、引入依赖

<dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jetty</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-test</artifactId>
        </dependency>
        
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>springloaded</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
        </dependency>
        
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-eureka</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-config</artifactId>
        </dependency>
        
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-hystrix</artifactId>
        </dependency>
        
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-config-server</artifactId>
        </dependency>
    </dependencies>

3、yml配置

server:
      port: 3344
    
    spring:
      application:
        name: springcloud-config
      cloud:
        config:
          server:
            git:
              uri: http://192.168.106.130:8090/root/springcloud-config.git    #GitLab上面的git仓库地址
              username: root
              password: lizhiqiang1217

4、在主启动类上添加@EnableConfigServer注解

/**
     *访问配置信息的URL与配置文件（本地或者git里的配置文件，不是项目里的配置文件的内容）的映射关系如下：
     *   application就是文件名的前半部分或yml中配置的应用名，profile就是开发版本 label就是git分支
     *   /{application}/{profile}[/{label}]
     *   /{application}-{profile}.yml
     *   /{label}/{application}-{profile}.yml
     *   /{application}-{profile}.properties
     *   /{label}/{application}-{profile}.properties
     * 上面的url会映射{application}-{profile}.properties对应的配置文件，其中{label}对应Git上不同的分支，默认为master。
     * 我们可以尝试构造不同的url来访问不同的配置内容，比如，要访问master分支，config-client应用的dev环境，就可以访问这个url：
     *   http://config3344.com:3344/springcloud-config/dev/master
     *   http://config3344.com:3344/application-dev.yml
     *   http://config3344.com:3344/master/application-dev.yml
     *   http://config3344.com:3344/application-dev.properties
     *   http://config3344.com:3344/develop/application-dev.properties
     */
    @SpringBootApplication
    @EnableConfigServer
    public class SpringCloudConfig3344_App {
        public static void main(String[] args) {
            SpringApplication.run(SpringCloudConfig3344_App.class, args);
        }
    }

5、找到C:\\Windows\\System32\\drivers\\etc路径下的hosts文件。添加域名映射

127.0.0.1  config3344.com

6、启动服务。  
 [http://config3344.com:3344/application-dev.yml][http_config3344.com_3344_application-dev.yml]  
![在这里插入图片描述][20190504160923527.png]  
 [http://config3344.com:3344/application-test.yml][http_config3344.com_3344_application-test.yml]  
![在这里插入图片描述][20190504161056542.png]  
三、配置中心客户端  
1、新建配置中心客户端microservicecloud-config-client-3355工程  
2、引入依赖

<dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jetty</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-test</artifactId>
        </dependency>
        
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>springloaded</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
        </dependency>
        
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-eureka</artifactId>
        </dependency>
        
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-config</artifactId>
        </dependency>
        
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-hystrix</artifactId>
        </dependency>
        
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-config</artifactId>
        </dependency>
    </dependencies>

3、application.yml配置

spring:
      application:
        name: springcloud-config-client

4、bootstrap.yml配置。主要负责从从外部源加载配置属性并解析配置。

#application.yml是用户级的资源配置项
    #bootstrap.yml是系统级的资源配置项，优先级更高
    spring:
      cloud:
        config:
          name: springcloud-config-client    #需要从GitLab上读取的资源名称，注意没有yml后缀名
          profile: dev    #本次访问的配置项
          label: master
          uri: http://config3344.com:3344    #该微服务启动后先去找服务配置中心3344，通过SpringCloudConfig获取GitLab地址

5、找到C:\\Windows\\System32\\drivers\\etc路径下的hosts文件。添加域名映射

127.0.0.1  client-config.com

6、创建类ConfigClientRest用来验证能否从GitLab上获取到配置信息

@RestController
    public class ConfigClientRest {
    
        @Value("${spring.application.name}")
        private String applicationName;
    
        @Value("${eureka.client.service-url.defaultZone}")
        private String eurekaServers;
    
        @Value("${server.port}")
        private String port;
    
        @RequestMapping("/config")
        public String getConfig() {
            String str = "applicationName: " + applicationName + "\t eurekaServers:" + eurekaServers + "\t port: " + port;
            System.out.println("从服务配置中心3344中获取的信息: " + str);
            return "applicationName: " + applicationName + "\t eurekaServers:" + eurekaServers + "\t port: " + port;
        }
    }

7、启动配置中心服务端，再启动配置中心客户端。  
 [http://client-config.com:8201/config][http_client-config.com_8201_config]  
![在这里插入图片描述][20190504163609277.png]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpemhpcWlhbmcxMjE3_size_16_color_FFFFFF_t_70]: /images/20220205/55f091fb2e4b48f889a6db968adc7657.png
[http_config3344.com_3344_application-dev.yml]: http://config3344.com:3344/application-dev.yml
[20190504160923527.png]: /images/20220205/3e477d1d00fc4950a9fbf7bf11f36df8.png
[http_config3344.com_3344_application-test.yml]: http://config3344.com:3344/application-test.yml
[20190504161056542.png]: /images/20220205/52fe4499696344a7927f04b995fca3d9.png
[http_client-config.com_8201_config]: http://client-config.com:8201/config
[20190504163609277.png]: /images/20220205/00df5bfae0904a86b143f99a27add62e.png