分布式配置
分布式配置:配置管理工具包,让你可以把配置放到远程服务器,集中化管理集群配置,目前支持本地存储、Git以及Subversion。
在生产环境,由于配置繁多,造成运维人员或开发人员配置上的不便,springcloud提供了分布式配置中心组建,支持从远程配置仓库(git)中读取配置。
读取配置流程如下图:
config-server从git中读取远程配置,config-client在从config-server中读取配置。
新建项目config-server,pom文件中加入config-server依赖,完整代码如下:
<?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.dalaoyang</groupId>
<artifactId>springcloud_config_server</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>springcloud_config_server</name>
<description>springcloud_config_server</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.SR1</spring-cloud.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-eureka</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-config-server</artifactId>
</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>
启动类加入@EnableConfigServer注解,表明这是一个config-server并开启配置服务器功能。代码如下:
package com.dalaoyang;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.config.server.EnableConfigServer;
@SpringBootApplication
@EnableConfigServer
public class SpringcloudConfigServerApplication {
public static void main(String[] args) {
SpringApplication.run(SpringcloudConfigServerApplication.class, args);
}
}
application.properties配置如下:
##端口号
server.port=9000
##服务名称
spring.application.name=config_server
##注册中心地址
eureka.client.service-url.defaultZone=http://eureka.dalaoyang.cn/eureka/
##远程仓库配置
##git仓库地址
spring.cloud.config.server.git.uri=https://gitee.com/dalaoyang/SpringCloudConfig.git
##git仓库配置路径
spring.cloud.config.server.git.searchPaths=config
##git仓库分支
spring.cloud.config.label=master
##如果为公开仓库,用户名密码可不填
##git仓库用户名
##spring.cloud.config.server.git.username=
##git仓库密码
##spring.cloud.config.server.git.password=
config-server到这里构建完成,然后新建一个config-client服务。pom文件代码如下:
<?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.dalaoyang</groupId>
<artifactId>springcloud_config_client</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>springcloud_config_client</name>
<description>springcloud_config_client</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.SR1</spring-cloud.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-eureka</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-config</artifactId>
</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>
然后新建一个配置文件,这里需要说明一下,config-client默认会去找8888端口的配置中心,如果配置中心使用8888端口,config-client可以使用application.properties配置文件。如果配置中心没有使用8888端口,那么config-client要使用bootstrap.properties,原因是bootstrap.* 命名的文件会被优先读取和配置。由于这个例子的项目使用端口为9000,所以新建一个bootstrap.properties,代码如下:
spring.application.name=config-client
spring.cloud.config.label=master
spring.cloud.config.profile=test
spring.cloud.config.uri= http://localhost:9000/
##注册中心地址
eureka.client.service-url.defaultZone=http://eureka.dalaoyang.cn/eureka/
然后做一个测试类,修改一下application,代码如下:
package com.dalaoyang;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@SpringBootApplication
@RestController
public class SpringcloudConfigClientApplication {
public static void main(String[] args) {
SpringApplication.run(SpringcloudConfigClientApplication.class, args);
}
@Value("${title}")
String title;
@RequestMapping("/getTitle")
public String getTitle(){
return title;
}
}
到这里就全部构建完成了,依次启动config-server和config-client。
先访问一下http://eureka.dalaoyang.cn/
可以看到服务构建成功,然后访问http://localhost:8080/getTitle,可以看到:
源码下载 :大老杨码云