Spring Cloud Config provides server and client-side support for externalized configuration in a distributed system.

Spring Cloud Config Quick Start Page

1. Preparation

Install Spring boot by following Spring boot getting started

Linux for example:

  1. Install Groovy Environment Manager
  2. $ gvm install springboot
  3. $ spring --version
  4. Spring Boot v1.2.5.RELEASE

A simple sample for Spring boot as below:

  1. package hello;
  2. import org.springframework.boot.*;
  3. import org.springframework.boot.autoconfigure.*;
  4. import org.springframework.stereotype.*;
  5. import org.springframework.web.bind.annotation.*;
  6. @Controller
  7. @EnableAutoConfiguration
  8. public class SampleController {
  9. @RequestMapping("/")
  10. @ResponseBody
  11. String home() {
  12. return "Hello World!";
  13. }
  14. public static void main(String[] args) throws Exception {
  15. SpringApplication.run(SampleController.class, args);
  16. }
  17. }

Git Clone the Sample Code of Srping Cloud Config

https://github.com/spring-cloud/spring-cloud-config/tree/1.0.2.RELEASE

.
├── docs
├── Guardfile
├── pom.xml
├── README.adoc
├── sample.groovy
├── spring-cloud-config-client
├── spring-cloud-config-sample
└── spring-cloud-config-server

2. The basic architecture of Spring Cloud Config

Setup Tips

  1. Start Config Server first
  2. Then start client app.
  3. After Config Server is down, Cient still works.
  4. Restarting Config Server will re-clone git properties
  5. use POST method instead of GET for curl command above

Setup Config Server

1. Start and visit config server

  1. $ cd spring-cloud-config-server
  2. $ mvn spring-boot:run
  3. $ curl localhost:8888/foo/default
  4. $ curl localhost:8888/foo/development
  5. {"name":"development","label":"master","propertySources":[
  6. {"name":"https://github.com/scratches/config-repo/foo-development.properties","source":{"bar":"spam"}}, # The priority of foo-development.properties is higher than foo.properties
  7. {"name":"https://github.com/scratches/config-repo/foo.properties","source":{"foo":"bar"}}
  8. ]}

localhost:8888/foo/development is following this convention:

/{application}/{profile}[/{label}]
application: foo
profile: development (environment like develop/qa/release/production)
label: "master" (master branch by default)

Explain more below.

2. Configurations in config server

  1. /spring-cloud-config-server$ tree
  2. .
  3. ├── pom.xml
  4. ├── src
  5. │   ├── main
  6. │   │   ├── java
  7. │   │   └── resources
  8. │   │   ├── configserver.yml

The content of the configserver.yml

  1. info:
  2. component: Config Server
  3. spring:
  4. application:
  5. name: configserver
  6. jmx:
  7. default_domain: cloud.config.server
  8. cloud:
  9. config:
  10. server:
  11. git:
  12. uri: https://github.com/spring-cloud-samples/config-repo
  13. repos:
  14. - patterns: multi-repo-demo-*
  15. uri: https://github.com/spring-cloud-samples/config-repo
  16. server:
  17. port: 8888
  18. management:
  19. context_path: /admin

The content of the git repository https://github.com/spring-cloud-samples/config-repo:

  1. .
  2. ├── application.yml
  3. ├── bar.properties
  4. ├── configserver.yml
  5. ├── eureka.yml
  6. ├── foo-development.properties
  7. ├── foo.properties
  8. ├── processor.yml
  9. ├── samplebackendservice-development.properties
  10. ├── samplebackendservice.properties
  11. ├── samplefrontendservice.properties
  12. ├── stores.yml
  13. └── zuul.properties

Will be cloned to /tmp/config-repo-{id} in Linux

localhost:8888/foo/development refer to foo-development.properties 

localhost:8888/foo/default refer to foo.properties

Updating git repostiory will reflect to localhost:8888 like /tmp/config-repo-{id}

3. Client Side Usage

Simple structure for client side.

  1. ├── pom.xml
  2. ├── src
  3. │   ├── main
  4. │   │   ├── java
  5. │   │   │   └── sample
  6. │   │   │   └── Application.java
  7. │   │   └── resources
  8. │   │   ├── application.yml
  9. │   │   └── bootstrap.yml
  1. $ cd spring-cloud-config-sample
  2. $ mvn spring-boot:run

spring-cloud-config-sample/pom.xml

  1. <parent>
  2. <groupId>org.springframework.boot</groupId>
  3. <artifactId>spring-boot-starter-parent</artifactId>
  4. <version>1.2.3.RELEASE</version>
  5. <relativePath /> <!-- lookup parent from repository -->
  6. </parent>
  7. <dependencyManagement>
  8. <dependencies>
  9. <dependency>
  10. <groupId>org.springframework.cloud</groupId>
  11. <artifactId>spring-cloud-starter-parent</artifactId>
  12. <version>1.0.1.RELEASE</version>
  13. <type>pom</type>
  14. <scope>import</scope>
  15. </dependency>
  16. </dependencies>
  17. </dependencyManagement>
  18. <dependencies>
  19. <dependency>
  20. <groupId>org.springframework.cloud</groupId>
  21. <artifactId>spring-cloud-starter-config</artifactId>
  22. </dependency>
  23. <dependency>
  24. <groupId>org.springframework.boot</groupId>
  25. <artifactId>spring-boot-starter-test</artifactId>
  26. <scope>test</scope>
  27. </dependency>
  28. </dependencies>
  29. <build>
  30. <plugins>
  31. <plugin>
  32. <groupId>org.springframework.boot</groupId>
  33. <artifactId>spring-boot-maven-plugin</artifactId>
  34. </plugin>
  35. </plugins>
  36. </build>
  37. <!-- repositories also needed for snapshots and milestones -->

Main Client class:

spring-cloud-config-sample/src/main/java/sample/Application.java

  1. @Configuration
  2. @EnableAutoConfiguration
  3. public class Application {
  4. public static void main(String[] args) {
  5. SpringApplication.run(Application.class, args);
  6. }
  7. }

spring-cloud-config-sample/src/main/resources/bootstrap.yml

  1. spring:
  2. application:
  3. name: bar
  4. cloud:
  5. config:
  6. env: default # optional
  7. label: master # optional
  8. uri: http://localhost:${config.port:8888}

where it specifies application name bar and the uri of spring cloud config server.

  1. $ curl localhost:8080/env
  2. {
  3. "profiles":[],
  4. "configService:https://github.com/scratches/config-repo/bar.properties":{"foo":"bar"},
  5. "servletContextInitParams":{},
  6. "systemProperties":{...},
  7. ...
  8. }

Usage:

1. Get/Refresh properties (Fetch value on request API call)

  1. $ curl localhost:8080/env/foo
  2. bar
  3. $ vi /tmp/config-repo-{id}/bar.properties
  4. .. change value of "bars"
  5. $ curl -X POST localhost:8080/refresh
  6. ["foo"]
  7. $ curl localhost:8080/env/foo
  8. bars

2. Usage of ClientAppClass

  1. package demo;
  2. import org.springframework.beans.factory.annotation.Value;
  3. import org.springframework.boot.SpringApplication;
  4. import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
  5. import org.springframework.context.annotation.ComponentScan;
  6. import org.springframework.web.bind.annotation.RequestMapping;
  7. import org.springframework.web.bind.annotation.RestController;
  8. @EnableAutoConfiguration
  9. @ComponentScan
  10. @RestController
  11. public class ClientApp {
  12. @Value("${bar:World!}")
  13. String bar;
  14. @RequestMapping("/")
  15. String hello() {
  16. return "Hello " + bar + "!";
  17. }
  18. public static void main(String[] args) {
  19. SpringApplication.run(ClientApp.class, args);
  20. }
  21. }

You can also see a single property.

$ curl http://localhost:8080/env/bar
123456

When you access to the controller,

$ curl http://localhost:8080
Hello 123456!

you can find the property on Config Server is injected.

See more usage samples here: http://qiita.com/making@github/items/704d8e254e03c5cce546

Spring Cloud Config的更多相关文章

  1. 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serve ...

  2. Spring Cloud官方文档中文版-Spring Cloud Config(上)

    官方文档地址为:http://cloud.spring.io/spring-cloud-static/Dalston.SR2/#spring-cloud-feign 文中例子我做了一些测试在:http ...

  3. Spring Cloud官方文档中文版-Spring Cloud Config(下)-客户端等

    官方文档地址为:http://cloud.spring.io/spring-cloud-static/Dalston.SR2/#_serving_alternative_formats 文中例子我做了 ...

  4. SpringCloud的配置管理:Spring Cloud Config

    演示如何使用ConfigServer提供统一的参数配置服务 ###################################################################一.概 ...

  5. 搭建spring cloud config

    很久没更新了,因为不是专职研究spring cloud,因此更新速度得看工作强度大不大,每天能抽出的时间不多,如果更新太慢了,并且有小伙伴看的话,请见谅了. Spring Cloud简介 Spring ...

  6. Spring Cloud Config - RSA简介以及使用RSA加密配置文件

    简介 RSA非对称加密有着非常强大的安全性,HTTPS的SSL加密就是使用这种方法进行HTTPS请求加密传输的.因为RSA算法会涉及Private Key和Public Key分别用来加密和解密,所以 ...

  7. Spring Cloud Config 分布式配置中心使用教程

    一.简介 在分布式系统中,由于服务数量巨多,为了方便服务配置文件统一管理,实时更新,所以需要分布式配置中心组件.在Spring Cloud中,有分布式配置中心组件spring cloud config ...

  8. 【spring实战第五版遇到的坑】第14章spring.cloud.config.uri和token配置项无效

    本文使用的Spring Boot版本为:2.1.4.RELEASE Spring Cloud版本为:Greenwich.SR1 按照书上的做法,在application.yml中配置配置服务器的地址和 ...

  9. .NET Core微服务之基于Steeltoe使用Spring Cloud Config统一管理配置

    Tip: 此篇已加入.NET Core微服务基础系列文章索引 =>  Steeltoe目录快速导航: 1. 基于Steeltoe使用Spring Cloud Eureka 2. 基于Steelt ...

随机推荐

  1. 我的Python成长之路---第八天---Python基础(25)---2016年3月5日(晴)

    多进程 multiprocessing模块 multiprocessing模块提供了一个Process类来代表一个进程对象 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 ...

  2. drawInRect:withAttributes:

    - (void)drawRect:(CGRect)frame { NSMutableParagraphStyle *textStyle = [[NSMutableParagraphStyle defa ...

  3. Qt setStyleSheet 添加背景色/背景图片(取消背景色,读取本地文件作为背景色)

    容易搞定,mainWindow 是一个QWidget.// 设置背景色为蓝色mainWindow.setStyleSheet("background-color:blue;"); ...

  4. Qt 学习 之 二进制文件读写

    在上一章中,我们介绍了有关QFile和QFileInfo两个类的使用.我们提到,QIODevice提供了read().readLine()等基本的操作.同时,Qt 还提供了更高一级的操作:用于二进制的 ...

  5. 安装好maven后,在cmd中运行mvn报一下的错误

    当然报错,你这个路径下并没有pom.xml文件.你可以运行这个命令: mvn -version.

  6. poj 1256 Anagram(dfs)

    题目链接:http://poj.org/problem?id=1256 思路分析:该题为含有重复元素的全排列问题:由于题目中字符长度较小,采用暴力法解决. 代码如下: #include <ios ...

  7. PendingIntent.getBroadcast第四个参数flags

    (1) android.app.PendingIntent.FLAG_UPDATE_CURRENT 如果PendingIntent已经存在,保留它并且只替换它的extra数据. (2) android ...

  8. CentOS 6.4安装(超级详细图解教程)

    链接地址:http://www.osyunwei.com/archives/5855.html CentOS 6.4安装(超级详细图解教程) 附:CentOS 6.4下载地址 32位:http://m ...

  9. 安装 unixbench 报错解决方法

    一.准备工作 1.首先使用root用户登陆. 2.运行Unixbeanch需要GCC的支持,在安装Unixbeanch之前,需要先安装GCC,在Debian中,直接执行如下命令: 复制代码 代码如下: ...

  10. video.js的使用

    跨浏览器地播放视频,在网上找了一下,找到了video.js,记录一下video.js的简单用法. ? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 2 ...