Spring Cloud Config介紹+案例
測試中使用到的程式碼到在這裡https://download.csdn.net/download/zhou920786312/10853300
介紹
是一個解決分散式系統的配置管理方案
包含兩個部分
- server提供配置檔案的儲存、以介面的形式將配置檔案的內容提供出去，
- client通過介面獲取資料、並依據此資料初始化自己的應用。
Spring cloud使用git或svn存放配置檔案，預設情況下使用git
一個配置中心提供的核心功能
- 提供服務端和客戶端支援
- 集中管理各環境的配置檔案
- 配置檔案修改之後，可以快速的生效
- 可以進行版本管理
- 支援大的併發查詢
- 支援各種語言
圖解
案例
步驟
1在github上建立一個倉庫microservicecloud-config,
得到[email protected]:zhou920786312/microservicecloud-config.git
2複製倉庫到本地
git clone [email protected]:zhou920786312/microservicecloud-config.git
3將配置檔案application.yml上傳到遠端倉庫
application.yml
spring:
profiles:
active:
- dev
---
spring:
profiles: dev #開發環境
application:
name: microservicecloud-config-dev
---
spring:
profiles: test #測試環境
application:
name: microservicecloud-config-test
$ git status
$ git add .
$ git commit -m "init file"
$ git push origin master
4建立microservicecloud-config-3344（相當於第一幅圖的config-server）
<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>com.atguigu.springcloud</groupId>
<artifactId>microservicecloud</artifactId>
<version>0.0.1-SNAPSHOT</version>
</parent>
<artifactId>microservicecloud-config-3344</artifactId>
<dependencies>
<!-- springCloud Config -->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-config-server</artifactId>
</dependency>
<!-- 避免Config的Git外掛報錯：org/eclipse/jgit/api/TransportConfigCallback -->
<dependency>
<groupId>org.eclipse.jgit</groupId>
<artifactId>org.eclipse.jgit</artifactId>
<version>4.10.0.201712302008-r</version>
</dependency>
<!-- 圖形化監控 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<!-- 熔斷 -->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-hystrix</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-eureka</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-config</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jetty</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
</dependency>
<!-- 熱部署外掛 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>springloaded</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
</dependency>
</dependencies>
</project>
server:
port: 3344
spring:
application:
name: microservicecloud-config
cloud:
config:
server:
git:
uri: [email protected]:zhou920786312/microservicecloud-config.git #GitHub上面的git倉庫名字
package com.atguigu.springcloud;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.config.server.EnableConfigServer;
@SpringBootApplication
@EnableConfigServer
public class Config_3344_StartSpringCloudApp
{
public static void main(String[] args)
{
SpringApplication.run(Config_3344_StartSpringCloudApp.class, args);
}
}
host新增
127.0.0.1 config-3344.com
啟動microservicecloud-config-3344測試
http://config-3344.com:3344/application-dev.yml
讀取檔案的方式
5將配置檔案microservicecloud-config-client.yml上傳到遠端倉庫
spring:
profiles:
active:
- dev
---
server:
port: 8201
spring:
profiles: dev
application:
name: microservicecloud-config-client
eureka:
client: #客戶端註冊進eureka服務列表內
service-url:
defaultZone: http://eureka-dev.com:7001/eureka/
---
server:
port: 8202
spring:
profiles: test
application:
name: microservicecloud-config-client
eureka:
client: #客戶端註冊進eureka服務列表內
service-url:
defaultZone: http://eureka-test.com:7001/eureka/
6建立microservicecloud-config-client-3355（相當於第一幅圖的客戶端）
<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>com.atguigu.springcloud</groupId>
<artifactId>microservicecloud</artifactId>
<version>0.0.1-SNAPSHOT</version>
</parent>
<artifactId>microservicecloud-config-client-3355</artifactId>
<dependencies>
<!-- SpringCloud Config客戶端 -->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-config</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-hystrix</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-eureka</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-config</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jetty</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>springloaded</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
</dependency>
</dependencies>
</project>
spring:
application:
name: microservicecloud-config-client
spring:
cloud:
config:
#name實際內容是github的檔案：microservicecloud-config-client.yml
name: microservicecloud-config-client #需要從github上讀取的資源名稱，注意沒有yml字尾名
profile: test #本次訪問的配置項
label: master
uri: http://config-3344.com:3344 #本微服務啟動後先去找3344號服務，通過SpringCloudConfig獲取GitHub的服務地址
#上面的功能是：通過uri獲取配置中心的所有內容，通過name獲取具體的內容，通過profile獲取哪個環境的內容Host配置
127.0.0.1 client-config.com
@SpringBootApplication
public class ConfigClient_3355_StartSpringCloudApp
{
public static void main(String[] args)
{
SpringApplication.run(ConfigClient_3355_StartSpringCloudApp.class, args);
}
}
package com.atguigu.springcloud.rest;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class ConfigClientRest
{
@Value("${spring.application.name}")
private String applicationName;
@Value("${eureka.client.service-url.defaultZone}")
private String eurekaServers;
@Value("${server.port}")
private String port;
@RequestMapping("/config")
public String getConfig()
{
return "服務名稱: " + applicationName + "---- eureka服務名稱:" + eurekaServers + "---- 埠: " + port;
}
}
測試
啟動3344
http://config-3344.com:3344/microservicecloud-config-client-test.yml
啟動3355
http://client-config.com:8202/config
注意：如果需要改配置，只要bootstrap.yml改
測試
