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

前言：

    在分布式系統中每個微服務會有不同的配置檔案，并且在生産環境、開發環境、測試環境等可能都對應不同的配置檔案，分布式配置中心可以對其進行統一管理。可以把配置檔案放在一個磁盤路徑下，也可以放在git倉庫中。當然還是放在git倉庫中好

代碼：

    在上一篇代碼的基礎上增加config-service工程

pom.xml

加入maven依賴

<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位址
         uri: https://github.com/xuhaixing/springCloudConfig
        #配置檔案所在的目錄
         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的位址，如果有使用者名密碼也可以配置上

啟動類：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);
    }
}      

然後建立一個微服務：

加入maven依賴包：

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

pom.xml

加入下面依賴包：

<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:
      #開啟配置服務發現
        enabled: true
      #配置服務執行個體名稱
        service-id: config-service
      #配置檔案所在分支
      label: master
      profile: prd
      #遠端配置中心的通路位址
      #uri: http://localhost:8888/
  application:
    name: eureka-service      

把application.yml放到git上

eureka-service是服務id,  dev/prd是profile

啟動類：

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);
    }
}      

可以先直接通路配置中心試一試：

localhost:8888/eureka-service-dev.yml

也可以用下面這種方式試試：

基本有這幾種方式：

/{application}/{profile}[/{label}]

 /{application}-{profile}.yml

 /{label}/{application}-{profile}.yml

/{application}-{profile}.properties

/{label}/{application}-{profile}.properties      

然後啟動eureka,啟動config,然後啟動eureka-service看看能不能拉遠端配置：