SpringCloud教程七：高可用的分布式配置中心(SpringCloud Config)

<?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>

<groupId>com.springcloud</groupId>
<artifactId>config-eureka-server</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>

<name>config-eureka-server</name>
<description>Demo project for Spring Boot</description>

<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.9.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>
<spring-cloud.version>Edgware.RELEASE</spring-cloud.version>
</properties>

<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-eureka-server</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>${spring-cloud.version}</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>

</project>

@EnableEurekaServer
@SpringBootApplication
public class ConfigEurekaServerApplication {

public static void main(String[] args) {

SpringApplication.run(ConfigEurekaServerApplication.class, args);
}
}

server.port=8889
eureka.instance.hostname=localhost
#配置成服务
eureka.client.registerWithEureka= false
eureka.client.fetchRegistry=false
eureka.client.service-url.defaultZone= http://${eureka.instance.hostname}:${server.port}/eureka/[/code] 
2：修改之前的config-server工程

在pom中加入需要的依赖；

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


修改配置文件：

spring.application.name=config-server
server.port=8888

#配置文件在本地
#spring.profiles.active=native
#配置文件的目录
#spring.cloud.config.server.native.search-locations=D:/workspace/GitHub/spring-config/config-file

#spring.cloud.config.server.git.uri=https://github.com/forezp/SpringcloudConfig/
spring.cloud.config.server.git.uri=https://github.com/iot-wangshuyu/springcloud
#配置仓库路径
spring.cloud.config.server.git.searchPaths=SpringcloudConfig/respo/
#配置仓库的分支
spring.cloud.config.label=master
#访问git仓库的用户名
spring.cloud.config.server.git.username=
#访问git仓库的用户密码
spring.cloud.config.server.git.password=
#注册服务地址
eureka.client.service-url.defaultZone=http://localhost:8889/eureka/


修改启动类：

@SpringBootApplication
@EnableConfigServer
@EnableEurekaClient
public class ConfigServerApplication {

public static void main(String[] args) {

SpringApplication.run(ConfigServerApplication.class, args);
}
}


3：修改config-client工程

pom中添加相应的依赖：

<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>

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


修改配置文件名称为：bootstrap.properties

内容修改为：

#服务名称
spring.application.name=config-client
#仓库分支
spring.cloud.config.label=master
#dev开发环境配置文件
#test测试环境
#pro正式环境
spring.cloud.config.profile=dev
#使用eureka server的时候需要注释掉
#spring.cloud.config.uri= http://localhost:8888/ 
#服务注册地址
eureka.client.service-url.defaultZone=http://localhost:8889/eureka/
#从远程获取配置文件
spring.cloud.config.discovery.enabled=true
#订阅的服务名称
spring.cloud.config.discovery.service-id=config-server
server.port=8881


如果配置服务部署多份，通过负载均衡，从而高可用。

依次启动程序，config-eureka-server,config-server,config-client,浏览器访问：http://localhost:8889/可以查看服务注册情况；

浏览器访问：http://localhost:8881/hi；返回配置文件中的foo属性；

说明高可用分布式配置中心配置成功