SpringCloud微服务高级

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;

  }

}