SpringCloud微服务高级

Posted 2021-02-10 虚极静笃

分布式配置中心

 

什么是配置中心

在分布式系统中，由于服务数量巨多，为了方便服务配置文件统一管理，实时更新，所以需要分布式配置中心组件。在Spring Cloud中，有分布式配置中心组件spring cloud config ，它支持配置服务放在配置服务的内存中（即本地），也支持放在远程Git仓库中。在spring cloud config 组件中，分两个角色，一是config server，二是config client。

创建git地址

1. 使用码云创建git地址 https://gitee.com/itmayi
2. config-client-dev.properties  ---dev环境
3. 上传配置文件

userName=yushengjun

 

4. http://localhost:8889/foo/dev 查询配置中心

创建config-server项目

<parent>         <groupId>org.springframework.boot</groupId>         <artifactId>spring-boot-starter-parent</artifactId>         <version>1.5.2.RELEASE</version>         <relativePath /> <!-- lookup parent from repository -->   </parent>     <properties>         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>         <java.version>1.8</java.version>   </properties>     <dependencies>         <dependency>               <groupId>org.springframework.cloud</groupId>               <artifactId>spring-cloud-config-server</artifactId>         </dependency>           <dependency>               <groupId>org.springframework.boot</groupId>               <artifactId>spring-boot-starter-test</artifactId>               <scope>test</scope>         </dependency>           <dependency>               <groupId>org.springframework.cloud</groupId>               <artifactId>spring-cloud-starter-eureka</artifactId>         </dependency>   </dependencies>     <dependencyManagement>         <dependencies>               <dependency>                     <groupId>org.springframework.cloud</groupId>                     <artifactId>spring-cloud-dependencies</artifactId>                     <version>Camden.SR6</version>                     <type>pom</type>                     <scope>import</scope>               </dependency>         </dependencies>   </dependencyManagement>       <build>         <plugins>               <plugin>                     <groupId>org.springframework.boot</groupId>                     <artifactId>spring-boot-maven-plugin</artifactId>               </plugin>         </plugins>   </build>     <repositories>         <repository>               <id>spring-milestones</id>               <name>Spring Milestones</name>               <url>https://repo.spring.io/milestone</url>               <snapshots>                     <enabled>false</enabled>               </snapshots>         </repository>   </repositories>

application.properties 配置文件

spring.application.name=config-server server.port=8889 spring.cloud.config.server.git.uri=https://gitee.com/itmayi/cfg2.git spring.cloud.config.server.git.searchPaths=respo spring.cloud.config.label=master spring.cloud.config.server.git.username= spring.cloud.config.server.git.password=

spring.cloud.config.server.git.uri：配置git仓库地址

spring.cloud.config.server.git.searchPaths：配置仓库路径

spring.cloud.config.label：配置仓库的分支

spring.cloud.config.server.git.username：访问git仓库的用户名

spring.cloud.config.server.git.password：访问git仓库的用户密码

 

启动config-server项目

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

 

 

创建config-client项目

<parent>         <groupId>org.springframework.boot</groupId>         <artifactId>spring-boot-starter-parent</artifactId>         <version>1.5.2.RELEASE</version>         <relativePath /> <!-- lookup parent from repository -->   </parent>     <properties>         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>         <java.version>1.8</java.version>   </properties>     <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.boot</groupId>               <artifactId>spring-boot-starter-test</artifactId>               <scope>test</scope>         </dependency>   </dependencies>     <dependencyManagement>         <dependencies>               <dependency>                     <groupId>org.springframework.cloud</groupId>                     <artifactId>spring-cloud-dependencies</artifactId>                     <version>Dalston.RC1</version>                     <type>pom</type>                     <scope>import</scope>               </dependency>         </dependencies>   </dependencyManagement>     <build>         <plugins>               <plugin>                     <groupId>org.springframework.boot</groupId>                     <artifactId>spring-boot-maven-plugin</artifactId>               </plugin>         </plugins>   </build>     <repositories>         <repository>               <id>spring-milestones</id>               <name>Spring Milestones</name>               <url>https://repo.spring.io/milestone</url>               <snapshots>                     <enabled>false</enabled>               </snapshots>         </repository>   </repositories>

 

bootstrap.properties

spring.application.name=config-client spring.cloud.config.label=master spring.cloud.config.profile=dev spring.cloud.config.uri= http://localhost:8888/ server.port=8881

• spring.cloud.config.label 指明远程仓库的分支
• spring.cloud.config.profile
  • dev开发环境配置文件
  • test测试环境
  • pro正式环境
  • spring.cloud.config.uri= http://localhost:8888/ 指明配置服务中心的网址。

 

@SpringBootApplication @RestController public class ConfigClientApplication {     public static void main(String[] args) {         SpringApplication.run(ConfigClientApplication.class, args);   }     @Value("${userName}")   String userName;     @RequestMapping(value = "/getUserName")   public String getUserName () {         return userName;   } }