SpringCloud（十三）springCloud config 分布式配置中心

悠悠 2022-05-22 03:10 237阅读 0赞

##### 前言： #####

在分布式系统中每个微服务会有不同的配置文件，并且在生产环境、开发环境、测试环境等可能都对应不同的配置文件，分布式配置中心可以对其进行统一管理。可以把配置文件放在一个磁盘路径下，也可以放在git仓库中。当然还是放在git仓库中好

##### 代码： #####

在上一篇代码的基础上增加config-service工程

pom.xml

加入maven依赖

<dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-config-server</artifactId>
            </dependency>

application.yml

server:
      port: 8888
    spring:
      application:
        name: config-service
      cloud:
        config:
          server:
            git:
              #git地址
             uri: https://github.com/xuhaixing/springCloudConfig
            #配置文件所在的目录
             search-paths: /**
             #default-label: master
              #username:
              #password:
          label: master
         # username:
          #password:
    eureka:
      client:
        service-url:
          default-zone: http://localhost:8761/eureka

上面配置git的地址，如果有用户名密码也可以配置上

启动类：加上@EnableConfigServer

package com.xhx.springcloud;
    
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.cloud.config.server.EnableConfigServer;
    import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
    
    /**
     * xuhaixing
     * 2018/6/13 12:57
     */
    @SpringBootApplication
    @EnableEurekaClient
    @EnableConfigServer
    public class ConfigServiceApplication {
        public static void main(String[] args) {
            SpringApplication.run(ConfigServiceApplication.class,args);
        }
    }

然后创建一个微服务：

加入maven依赖包：

<dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-config</artifactId>
            </dependency>

pom.xml

加入下面依赖包：

<dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-config</artifactId>
            </dependency>

<?xml version="1.0" encoding="UTF-8"?>
    <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">
        <modelVersion>4.0.0</modelVersion>
    
        <artifactId>eureka-service</artifactId>
        <version>0.0.1-SNAPSHOT</version>
        <packaging>jar</packaging>
    
        <name>eureka-service</name>
    
        <parent>
            <groupId>com.xhx.springcloud</groupId>
            <artifactId>springcloud14-config</artifactId>
            <version>0.0.1-SNAPSHOT</version>
        </parent>
        
    
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-config</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-netflix-eureka-client</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-actuator</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-test</artifactId>
                <scope>test</scope>
            </dependency>
        </dependencies>
    
        <build>
            <plugins>
                <plugin>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-maven-plugin</artifactId>
                </plugin>
            </plugins>
        </build>
    
    
    </project>

bootstrap.yml

spring:
      cloud:
        config:
          discovery:
          #开启配置服务发现
            enabled: true
          #配置服务实例名称
            service-id: config-service
          #配置文件所在分支
          label: master
          profile: prd
          #远程配置中心的访问地址
          #uri: http://localhost:8888/
      application:
        name: eureka-service

把application.yml放到git上

![70][]

eureka-service是服务id,  dev/prd是profile

启动类：

package com.xhx.springcloud;
    
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
    
    @SpringBootApplication
    @EnableEurekaClient
    public class EurekaServiceApplication {
    
        public static void main(String[] args) {
            SpringApplication.run(EurekaServiceApplication.class, args);
        }
    }

可以先直接访问配置中心试一试：

localhost:8888/eureka-service-dev.yml

![70 1][]

也可以用下面这种方式试试：

![70 2][]

基本有这几种方式：

/{application}/{profile}[/{label}]
    
     /{application}-{profile}.yml
    
     /{label}/{application}-{profile}.yml
    
    /{application}-{profile}.properties
    
    /{label}/{application}-{profile}.properties

然后启动eureka,启动config,然后启动eureka-service看看能不能拉远程配置：

![70 3][]

证明么有问题，启动了

[70]: /images/20220522/8ff7de5a3b0d46fdbf6e50103ae7510c.png
[70 1]: /images/20220522/eaedf7bc30884abeb620d915dc51a0a2.png
[70 2]: /images/20220522/77b5efd435f84f668a849b093db44e79.png
[70 3]: /images/20220522/45a57868be8746c5b1a7a2718ad2907b.png