Spring Cloud Config
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:
Install Groovy Environment Manager
$ gvm install springboot
$ spring --version
Spring Boot v1.2.5.RELEASE
A simple sample for Spring boot as below:
package hello;
import org.springframework.boot.*;
import org.springframework.boot.autoconfigure.*;
import org.springframework.stereotype.*;
import org.springframework.web.bind.annotation.*;
@Controller
@EnableAutoConfiguration
public class SampleController {
@RequestMapping("/")
@ResponseBody
String home() {
return "Hello World!";
}
public static void main(String[] args) throws Exception {
SpringApplication.run(SampleController.class, args);
}
}
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
- Start Config Server first
- Then start client app.
- After Config Server is down, Cient still works.
- Restarting Config Server will re-clone git properties
- use POST method instead of GET for curl command above
Setup Config Server
1. Start and visit config server
$ cd spring-cloud-config-server
$ mvn spring-boot:run
$ curl localhost:8888/foo/default
$ curl localhost:8888/foo/development
{"name":"development","label":"master","propertySources":[
{"name":"https://github.com/scratches/config-repo/foo-development.properties","source":{"bar":"spam"}}, # The priority of foo-development.properties is higher than foo.properties
{"name":"https://github.com/scratches/config-repo/foo.properties","source":{"foo":"bar"}}
]}
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
/spring-cloud-config-server$ tree
.
├── pom.xml
├── src
│ ├── main
│ │ ├── java
│ │ └── resources
│ │ ├── configserver.yml
The content of the configserver.yml
info:
component: Config Server
spring:
application:
name: configserver
jmx:
default_domain: cloud.config.server
cloud:
config:
server:
git:
uri: https://github.com/spring-cloud-samples/config-repo
repos:
- patterns: multi-repo-demo-*
uri: https://github.com/spring-cloud-samples/config-repo
server:
port: 8888
management:
context_path: /admin
The content of the git repository https://github.com/spring-cloud-samples/config-repo:
.
├── application.yml
├── bar.properties
├── configserver.yml
├── eureka.yml
├── foo-development.properties
├── foo.properties
├── processor.yml
├── samplebackendservice-development.properties
├── samplebackendservice.properties
├── samplefrontendservice.properties
├── stores.yml
└── 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.
├── pom.xml
├── src
│ ├── main
│ │ ├── java
│ │ │ └── sample
│ │ │ └── Application.java
│ │ └── resources
│ │ ├── application.yml
│ │ └── bootstrap.yml
$ cd spring-cloud-config-sample
$ mvn spring-boot:run
spring-cloud-config-sample/pom.xml
<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.cloud</groupId>
<artifactId>spring-cloud-starter-config</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
<!-- repositories also needed for snapshots and milestones -->
Main Client class:
spring-cloud-config-sample/src/main/java/sample/Application.java
@Configuration
@EnableAutoConfiguration
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}
spring-cloud-config-sample/src/main/resources/bootstrap.yml
spring:
application:
name: bar
cloud:
config:
env: default # optional
label: master # optional
uri: http://localhost:${config.port:8888}
where it specifies application name bar and the uri of spring cloud config server.
$ curl localhost:8080/env
{
"profiles":[],
"configService:https://github.com/scratches/config-repo/bar.properties":{"foo":"bar"},
"servletContextInitParams":{},
"systemProperties":{...},
...
}
Usage:
1. Get/Refresh properties (Fetch value on request API call)
$ curl localhost:8080/env/foo
bar
$ vi /tmp/config-repo-{id}/bar.properties
.. change value of "bars"
$ curl -X POST localhost:8080/refresh
["foo"]
$ curl localhost:8080/env/foo
bars
2. Usage of ClientAppClass
package demo;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@EnableAutoConfiguration
@ComponentScan
@RestController
public class ClientApp {
@Value("${bar:World!}")
String bar;
@RequestMapping("/")
String hello() {
return "Hello " + bar + "!";
}
public static void main(String[] args) {
SpringApplication.run(ClientApp.class, args);
}
}
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
- 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 ...
- 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 ...
- 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 ...
- 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 ...
- 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 ...
- 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 ...
- 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 ...
- 【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 ...
- .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
- 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 ...
- drawInRect:withAttributes:
- (void)drawRect:(CGRect)frame { NSMutableParagraphStyle *textStyle = [[NSMutableParagraphStyle defa ...
- 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;"); ...
- 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 ...
- 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.
- 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 ...
- 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 ...
- 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 ...
- 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: ...
- 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 ...