SpringCloudConfig配置中心
概述
就前面項(xiàng)目而言硼瓣，分布面臨的問題是配置問題，每一個(gè)項(xiàng)目都有一個(gè)yml文件置谦，不好運(yùn)維管理堂鲤，所有需要一套集中式，動(dòng)態(tài)的配置管理設(shè)施媒峡，SpringCloud提供了ConfigServer來解決這個(gè)問題瘟栖。
SpringCloud Config是為微服務(wù)架構(gòu)中的微服務(wù)提供集中化的外部配置支持，配置服務(wù)器為 各個(gè)不同的微服務(wù)應(yīng)用的環(huán)境提供了一個(gè) 中心化的外部配置谅阿。SpringCloud Config分為客戶端和服務(wù)端半哟，服務(wù)端也稱 分布式配置中心酬滤，它是一個(gè)獨(dú)立的微服務(wù)應(yīng)用，用來連接配置服務(wù)器并為客戶端提供獲取配置信息寓涨，加密和解密信息等訪問接口盯串，客戶端是通過指定的配置中心獲取和加載配置信息配置服務(wù)器默認(rèn)采用git來存儲(chǔ)配置信息，這樣就有助于對(duì)環(huán)境配置進(jìn)行版本管理戒良，并且可以通過git客戶端工具管理和訪問配置內(nèi)容体捏。
作用
- 集中管理配置文件
- 不同環(huán)境下不同配置，動(dòng)態(tài)化的配置更新蔬墩，分環(huán)境部署等
- 運(yùn)行期間動(dòng)態(tài)調(diào)整配置译打，不需要在每一個(gè)服務(wù)部署的機(jī)器編碼上編寫文件，服務(wù)會(huì)向配置中心拉取自己的配置信息
- 當(dāng)配置發(fā)生變動(dòng)時(shí)拇颅，服務(wù)不需要重啟即可感知配置的變化并應(yīng)用新的配置
- 將配置信息以REST接口的形式暴露
config服務(wù)端與GitHub通信
GitHUb上新建一個(gè)microservicecloud-config的Repository
本地硬盤目錄新建git倉庫并clone
在D:\workspace2018\micorservicecloude-config\microservicecloud-config新建application.yml文件
Spring:
profiles:
active:
- dev
---
Spring:
profiles: dev
application:
name: micorservicecloud-config-luo-dev
---
Spring:
profiles: test
application:
name: micorservicecloud-config-luo-test
注意保存為utf-8的文件格式
將yml文件推送到GitHub上
git add .
git commit -m""
git push origin master
新建項(xiàng)目microservicecloud-config-3344
POM.xml文件
<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.luo.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插件報(bào)錯(cuò)：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(jiān)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>
<!-- 熱部署插件 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>springloaded</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
</dependency>
</dependencies>
</project>
application.yml文件
server:
port: 3344
spring:
application:
name: microservicecloud-config
cloud:
config:
server:
git:
uri: git@github.com:luokangyuan/microservicecloud-config.git #GitHub上面的git倉庫名字
主啟動(dòng)類
@SpringBootApplication
@EnableConfigServer
public class Config_3344_StartSpringCloudApp {
public static void main(String[] args) {
SpringApplication.run(Config_3344_StartSpringCloudApp.class, args);
}
}
修改host文件
127.0.0.1 config-3344.com
測(cè)試通過config微服務(wù)從GitHub上獲取配置內(nèi)容
啟動(dòng)服務(wù)3344奏司，訪問http://config-3344.com:3344/application-dev.yml，http://config-3344.com:3344/application-test.yml
config客戶端獲取github配置
本地新建microservicecloud-config-client.yml文件,并推送到github
server:
port: 8201
spring:
profiles: dev
application:
name: microservicecloud-config-client
eureka:
client:
service-url:
defaultZone: http://eureka-dev.com:7001/eureka/
---
server:
port: 8202
spring:
profiles: test
application:
name: microservicecloud-config-client
eureka:
client:
service-url:
defaultZone: http://eureka-test.com:7001/eureka/
新建項(xiàng)目microservicecloud-config-client-3355樟插，pom.xml文件如下
<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.luo.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>
新建bootstrap.yml文件
spring:
cloud:
config:
name: microservicecloud-config-client #需要從github上讀取的資源名稱睛竣，注意沒有yml后綴名
profile: test #本次訪問的配置項(xiàng)
label: master
uri: http://config-3344.com:3344 #本微服務(wù)啟動(dòng)后先去找3344號(hào)服務(wù)朱盐，通過SpringCloudConfig獲取GitHub的服務(wù)地址
application.yml是用戶級(jí)的資源配置文件，bootstrap.yml是系統(tǒng)級(jí)，優(yōu)先級(jí)更高芹敌，保證不會(huì)被本地配置文件所覆蓋
修改host文件，增加映射
127.0.0.1 client-config.com
新建測(cè)試controller摘投，從github讀取配置信息
package com.luo.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()
{
String str = "applicationName: " + applicationName + "\t eurekaServers:" + eurekaServers + "\t port: " + port;
System.out.println("******str: " + str);
return "applicationName: " + applicationName + "\t eurekaServers:" + eurekaServers + "\t port: " + port;
}
}
新建主啟動(dòng)類
@SpringBootApplication
public class ConfigClient_3355_StartSpringCloudApp {
public static void main(String[] args) {
SpringApplication.run(ConfigClient_3355_StartSpringCloudApp.class, args);
}
}
測(cè)試
啟動(dòng)3344服務(wù)扣典，啟動(dòng)3355服務(wù)，bootstrap.yml中的profile值是什么流强，決定從github上讀取什么,ruguo
訪問http://client-config.com:8201/config得到是github上的microservicecloud-config-client.yml文件中dev相關(guān)的配置信息
訪問http://client-config.com:8202/config得到是github上的microservicecloud-config-client.yml文件中test相關(guān)的配置信息
