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

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>

<?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">
    <parent>
        <artifactId>springcloud14-config</artifactId>
        <groupId>com.xhx.springcloud</groupId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>config-service</artifactId>

    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-config-server</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>
    </dependencies>

</project>

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

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

也可以用下面这种方式试试：

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：

证明么有问题，启动了