springcloud(第一篇)springcloud config 入门

spring cloud config 入门

简介

Spring cloud config 分为两部分 server client 

• config-server 配置服务端，服务管理配置信息
• config-client 客户端，客户端调用server端暴露接口获取配置信息

config-server

创建config-server

首先创建config-server工程.

文件结构：

├── config-server.iml├── pom.xml└── src    ├── main    │   ├── java    │   │   └── com    │   │       └── lkl    │   │           └── springcloud    │   │               └── config    │   │                   └── server    │   │                       └── Application.java    │   └── resources    │       ├── application.properties    │       └── bootstrap.properties    └── test        └── java

pom.xml内容：

<?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>    <parent>        <groupId>org.springframework.boot</groupId>        <artifactId>spring-boot-starter-parent</artifactId>        <version>1.2.3.RELEASE</version>        <relativePath /> <!-- lookup parent from repository -->    </parent>    <groupId>com.lkl.springcloud</groupId>    <artifactId>spring-cloud-config-server</artifactId>    <version>1.0-SNAPSHOT</version>    <dependencyManagement>        <dependencies>            <dependency>                <groupId>org.springframework.cloud</groupId>                <artifactId>spring-cloud-config</artifactId>                <version>1.0.4.RELEASE</version>                <type>pom</type>                <scope>import</scope>            </dependency>        </dependencies>    </dependencyManagement>    <dependencies>        <dependency>            <groupId>org.springframework.cloud</groupId>            <artifactId>spring-cloud-starter-config</artifactId>        </dependency>        <!--表示为web工程-->        <dependency>            <groupId>org.springframework.boot</groupId>            <artifactId>spring-boot-starter-web</artifactId>        </dependency>        <!--暴露各种指标-->        <dependency>            <groupId>org.springframework.boot</groupId>            <artifactId>spring-boot-starter-actuator</artifactId>        </dependency>        <dependency>            <groupId>org.springframework.cloud</groupId>            <artifactId>spring-cloud-config-server</artifactId>        </dependency>    </dependencies>    <build>        <plugins>            <plugin>                <groupId>org.springframework.boot</groupId>                <artifactId>spring-boot-maven-plugin</artifactId>            </plugin>        </plugins>    </build></project>

创建启动类
Application.java

package com.lkl.springcloud.config.server;import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.EnableAutoConfiguration;import org.springframework.cloud.config.server.EnableConfigServer;import org.springframework.context.annotation.Configuration;import org.springframework.web.bind.annotation.RestController;/** * Created by liaokailin on 16/4/28. */@Configuration@EnableAutoConfiguration@RestController@EnableConfigServerpublic class Application {    public static void main(String[] args) {        SpringApplication.run(Application.class, args);    }}

其中 @EnableConfigServer为关键注解

在resources文件下创建application.properties

server.port=8888

配置工程监听端口8888，默认情况下client通过读取http://localhost:8888获取配置信息

创建bootstrap.properties

spring.cloud.config.server.git.uri: https://github.com/liaokailin/config-repo

该配置信息通过fork https://github.com/spring-cloud-samples/config-repo 得到
通过spring.cloud.config.server.git.uri指定配置信息存储的git地址

运行config-server

spring boot工程很方便启动，运行Application.java即可

获取git上的资源信息遵循如下规则：

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

• application:表示应用名称,在client中通过spring.config.name配置
• profile:表示获取指定环境下配置，例如开发环境、测试环境、生产环境 默认值default，实际开发中可以是 dev、test、demo、production等
• label: git标签，默认值master

如果application名称为foo，则可以采用如下方式访问：

http://localhost:8888/foo/default
http://localhost:8888/foo/development

只要是按照上面的规则配置即可访问.

config-client

创建config-client

目录结构如下：

├── pom.xml├── spring-cloud-config-client.iml└── src    ├── main    │   ├── java    │   │   └── com    │   │       └── lkl    │   │           └── springcloud    │   │               └── config    │   │                   └── client    │   │                       └── Application.java    │   └── resources    │       └── bootstrap.yml    └── test        └── java

pom.xml

<?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.lkl.springcloud</groupId>    <artifactId>spring-cloud-config-client</artifactId>    <version>1.0-SNAPSHOT</version>    <parent>        <groupId>org.springframework.boot</groupId>        <artifactId>spring-boot-starter-parent</artifactId>        <version>1.2.3.RELEASE</version>        <relativePath /> <!-- lookup parent from repository -->    </parent>    <dependencyManagement>        <dependencies>            <dependency>                <groupId>org.springframework.cloud</groupId>                <artifactId>spring-cloud-starter-parent</artifactId>                <version>1.0.1.RELEASE</version>                <type>pom</type>                <scope>import</scope>            </dependency>        </dependencies>    </dependencyManagement>    <dependencies>        <dependency>            <groupId>org.springframework.boot</groupId>            <artifactId>spring-boot-starter-web</artifactId>        </dependency>        <dependency>            <groupId>org.springframework.cloud</groupId>            <artifactId>spring-cloud-config-client</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>    <repositories>        <repository>            <id>spring-milestones</id>            <name>Spring Milestones</name>            <url>http://repo.spring.io/milestone</url>            <snapshots>                <enabled>false</enabled>            </snapshots>        </repository>    </repositories>    <pluginRepositories>        <pluginRepository>            <id>spring-milestones</id>            <name>Spring Milestones</name>            <url>http://repo.spring.io/milestone</url>            <snapshots>                <enabled>false</enabled>            </snapshots>        </pluginRepository>    </pluginRepositories>    <build>        <plugins>            <plugin>                <groupId>org.springframework.boot</groupId>                <artifactId>spring-boot-maven-plugin</artifactId>            </plugin>        </plugins>    </build></project>

创建启动类Application.java

package com.lkl.springcloud.config.client;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;/** * Created by liaokailin on 16/4/28. */@SpringBootApplication@RestControllerpublic class Application {    @Value("${name:World!}")    String bar;    @RequestMapping("/")    String hello() {        return "Hello " + bar + "!";    }    public static void main(String[] args) {        SpringApplication.run(Application.class, args);    }}

创建bootstrap.properties文件，其内容如下：

spring.application.name: foospring.cloud.config.env:defaultspring.cloud.config.label:masterspring.cloud.config.uri:http://localhost:8888

其中 spring.application.name 为应用名称，spring.cloud.config.uri 配置config-server暴露的获取配置接口,其默认值为http://localhost:8888
第二三项配置在前面已经提到过，配置的都为默认值，因此bootstrap.properties只需要配置应用名即可.

运行config-client

访问 http://localhost 得到 `Hello liaokailin` 获取到git上的配置信息访问 http://localhost/env 得到所有的配置信息，可以发现获取配置信息成功.

{profiles: [ ],configService:https://github.com/liaokailin/config-repo/foo.properties: {name: "liaokailin",foo: "devoxxfr"},configService:https://github.com/liaokailin/config-repo/application.yml: {info.description: "Spring Cloud Samples--lkl",info.url: "https://github.com/spring-cloud-samples",eureka.client.serviceUrl.defaultZone: "http://localhost:8761/eureka/"},commandLineArgs: {spring.output.ansi.enabled: "always"},servletContextInitParams: { },...}

ok ~ it’s work ! more about is here
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http://blog.csdn.net/liaokailin/article/details/51307215

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