Spring Cloud学习--spring cloud config配置中心

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归田归田 2022-08-25 17:43:16 博主文章分类：SpringCloud入门学习 ©著作权

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Spring Cloud Config是Spring Cloud团队创建的一个全新项目，用来为分布式系统中的基础设施和微服务应用提供集中化的外部配置支持，它分为服务端与客户端两个部分。其中服务端也称为分布式配置中心，它是一个独立的微服务应用，用来连接配置仓库并为客户端提供获取配置信息、加密/解密信息等访问接口；而客户端则是微服务架构中的各个微服务应用或基础设施，它们通过指定的配置中心来管理应用资源与业务相关的配置内容，并在启动的时候从配置中心获取和加载配置信息。Spring Cloud Config实现了对服务端和客户端中环境变量和属性配置的抽象映射，所以它除了适用于Spring构建的应用程序之外，也可以在任何其他语言运行的应用程序中使用。由于Spring Cloud Config实现的配置中心默认采用Git来存储配置信息，所以使用Spring Cloud Config构建的配置服务器，天然就支持对微服务应用配置信息的版本管理，并且可以通过Git客户端工具来方便的管理和访问配置内容。当然它也提供了对其他存储方式的支持，比如：SVN仓库、本地化文件系统。

Spring Cloud Config 服务端

注册中心配置内存存储方式采用Git方式。

1、pom.xml中添加config-server相关jar

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <parent>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-parent</artifactId>
      <version>1.5.10.RELEASE</version>
  </parent>
  
  <dependencyManagement>
      <dependencies>
          <dependency>
              <groupId>org.springframework.cloud</groupId>
              <artifactId>spring-cloud-dependencies</artifactId>
              <version>Edgware.SR3</version>
              <type>pom</type>
              <scope>import</scope>
          </dependency>
      </dependencies>
  </dependencyManagement>
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.tianjunwei</groupId>
  <artifactId>TJWspringCloud-config-server</artifactId>
  <version>1.0.0-SNAPSHOT</version>
  <packaging>jar</packaging>
  <name>TJWspringCloud-consumer</name>
  <dependencies>
      <dependency>
      <groupId>org.springframework.cloud</groupId>
      <artifactId>spring-cloud-config-server</artifactId>
    </dependency>
        <dependency>  
            <groupId>ch.qos.logback</groupId>  
            <artifactId>logback-core</artifactId>  
        </dependency>  
        <dependency>  
            <groupId>ch.qos.logback</groupId>  
            <artifactId>logback-classic</artifactId>  
        </dependency>  
        <dependency>  
            <groupId>ch.qos.logback</groupId>  
            <artifactId>logback-access</artifactId>  
        </dependency>  
  </dependencies>
  <build>
    <resources>
      <resource>
        <directory>src/main/java</directory>
        <includes>
          <include>**/*.xml</include>
        </includes>
      </resource>
      <resource>
        <directory>src/test/java</directory>
        <includes>
          <include>**/*.xml</include>
        </includes>
      </resource>
      <resource>
        <directory>src/main/resources</directory>
        <includes>
          <include>**/*.*</include>
        </includes>
      </resource>
    </resources>
    <plugins>  
      <plugin>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-maven-plugin</artifactId>
      </plugin>
      
          <plugin>  
              <groupId>org.apache.maven.plugins</groupId>  
              <artifactId>maven-compiler-plugin</artifactId>  
              <version>2.0.2</version>  
              <configuration>  
                  <source>1.8</source>  
                  <target>1.8</target>  
              </configuration>  
          </plugin>  
      </plugins>  
  </build>
</project>

2、application.yml中添加配置信息git地址等，并且在github地址下必须存在与应用名称spring-cloud-config-server一样的spring-cloud-config-server.yml的文件

spring:
  application:
    name: spring-cloud-config-server
  cloud:
    config:
      server:
        git:
#github地址，在此工程有一个和应用名一样的spring-cloud-config-server.yml的文件
          uri: https://github.com/IAMTJW/TJWspringCloud/
#          search-paths: repo
#          username:
#          password:

server:
  port: 1201

spring-cloud-config-server.yml配置文件中的信息如下：

database:
  port: 3306

3、启动配置中心

在启动类中添加注解@EnableConfigServer，这样服务在启动的时候就可以通过访问地址获取相关配置信息

@SpringBootApplication
@EnableConfigServer
@RestController
public class ConfigServerApplication {
    

    @RequestMapping(value = "/config-info", method = RequestMethod.GET)
    public String info() {
        return "success";
    }
    public static void main(String[] args) {
        SpringApplication.run(ConfigServerApplication.class, args);
    }
}

访问http://localhost:1201/spring-cloud-config-server/master就可以获取到配置中心的相关配置信息

Spring Cloud学习--spring cloud config配置中心_spring

Spring Cloud Config 客户端

配置客户端在启动的时候可以从配置中心获取到相关配置信息，当配置中心的配置修改时可以主动刷新修改。

1、pom.xml相关配置

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <parent>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-parent</artifactId>
      <version>1.5.10.RELEASE</version>
  </parent>
  
  <dependencyManagement>
      <dependencies>
          <dependency>
              <groupId>org.springframework.cloud</groupId>
              <artifactId>spring-cloud-dependencies</artifactId>
              <version>Edgware.SR3</version>
              <type>pom</type>
              <scope>import</scope>
          </dependency>
      </dependencies>
  </dependencyManagement>
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.tianjunwei</groupId>
  <artifactId>TJWspringCloud-config-client</artifactId>
  <version>1.0.0-SNAPSHOT</version>
  <packaging>jar</packaging>
  <name>TJWspringCloud-consumer</name>
  <dependencies>
      <dependency>
      <groupId>org.springframework.cloud</groupId>
      <artifactId>spring-cloud-starter-config</artifactId>
    </dependency>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-actuator</artifactId>
    </dependency>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
        <dependency>  
            <groupId>ch.qos.logback</groupId>  
            <artifactId>logback-core</artifactId>  
        </dependency>  
        <dependency>  
            <groupId>ch.qos.logback</groupId>  
            <artifactId>logback-classic</artifactId>  
        </dependency>  
        <dependency>  
            <groupId>ch.qos.logback</groupId>  
            <artifactId>logback-access</artifactId>  
        </dependency>  
  </dependencies>
  <build>
    <resources>
      <resource>
        <directory>src/main/java</directory>
        <includes>
          <include>**/*.xml</include>
        </includes>
      </resource>
      <resource>
        <directory>src/test/java</directory>
        <includes>
          <include>**/*.xml</include>
        </includes>
      </resource>
      <resource>
        <directory>src/main/resources</directory>
        <includes>
          <include>**/*.*</include>
        </includes>
      </resource>
    </resources>
    <plugins>  
      <plugin>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-maven-plugin</artifactId>
      </plugin>
      
          <plugin>  
              <groupId>org.apache.maven.plugins</groupId>  
              <artifactId>maven-compiler-plugin</artifactId>  
              <version>2.0.2</version>  
              <configuration>  
                  <source>1.8</source>  
                  <target>1.8</target>  
              </configuration>  
          </plugin>  
      </plugins>  
  </build>
</project>

2、在boostrap.yml中添加注册中心http://localhost:1201的相关配置信息

在bootstrap.yml中设置客户端名称spring.application.name和Config服务器的地址，注意spring.application.name要和配置文件名相符

spring:
  application:
    name: spring-cloud-config-server
  cloud:
    config:
      uri: http://localhost:1201/

3、启动客户端就可以获取到注册中心相关配置

import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.context.config.annotation.RefreshScope;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

@SpringBootApplication
@RestController
@RefreshScope
public class ConfigClientApplication {
    
     @Value("${database.port}")
     private int port;

    @RequestMapping(value = "/config-info", method = RequestMethod.GET)
    public int info() {
        return port;
    }
    
    public static void main(String[] args) {
        SpringApplication.run(ConfigClientApplication.class, args);
    }
}