springcloud(第一篇)springcloud config 入门

spring cloud config 入门

简介

Spring cloud config 分为两部门 server client

config-server

创建config-server

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

<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>

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
@EnableConfigServer
public class Application {

public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}

@EnableConfigServer

resources

application.properties

server.port=8888

http://localhost:8888

bootstrap.properties

spring.cloud.config.server.git.uri: https://github.com/liaokailin/config-repo[/code] 
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
@RestController
public 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: foo
spring.cloud.config.env:default
spring.cloud.config.label:master
spring.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