SpringCloud config分散式配置中心
阿新 • • 發佈：2020-10-27
分散式系統面臨的配置問題
springcloud聽過的config可以完美的解決上述的問題，springcloud config是什麼
是什麼
怎麼玩‘
能幹嘛
集中管理配置檔案
不同環境不同配置，動態化的配置更新，分環境部署比如dev/test/prod/beta/release
執行期間動態調整配置，不再需要在每個服務部署的機器上編寫配置檔案，服務會向配置中心統一拉取配置自己的資訊
當配置發生變動時，服務不需要重啟即可感知到配置的變化並應用新的配置
將配置資訊以REST介面的形式暴露
與Github整合配置
由於SpringCloud Config預設使用Git來儲存配置檔案（也有其它方式，比如支援svn和本地檔案，但最推薦的還是Git，而且使用的是http/https訪問的形式）
Config服務端配置與測試
在自己的github建立一個倉庫，並在本地下載
這些前提條件搞好了之後建立cloud-config-center-3344服務端
pom檔案引入依賴
<?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">
<parent>
<artifactId>springcloud</artifactId>
<groupId>org.example</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>cloud-config-center-3344</artifactId>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.example</groupId>
<artifactId>cloud-api-conmmon</artifactId>
<version>1.0-SNAPSHOT</version>
</dependency>
<!--springcloud-config-->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-config-server</artifactId>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework.cloud/spring-cloud-starter-netflix-eureka-client -->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>
<!--SpringBoot熱部署配置 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<executions>
<execution>
<goals>
<goal>repackage</goal>
</goals>
</execution>
</executions>
<configuration>
<fork>true</fork>
</configuration>
</plugin>
</plugins>
</build>
</project>
application.yml
server:
port: 3344
spring:
application:
name: cloud-config-center
cloud:
config:
server:
git:
uri: https://github.com/changtoufadeguniang/springcloud-config
search-paths:
- springcloud-config
label: main
eureka:
client:
service-url:
defaultZone: http://localhost:7001/eureka
啟動類
@SpringBootApplication
@EnableConfigServer
public class ConfigCenterApplicaton3344 {
public static void main(String[] args) {
SpringApplication.run(ConfigCenterApplicaton3344.class,args);
}
}
測試http://localhost:3344/main/application-dev.yml
Config客戶端配置與測試 建立cloud-config-client-3355客戶端
pom
<?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">
<parent>
<artifactId>springcloud</artifactId>
<groupId>org.example</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>cloud-config-client-3355</artifactId>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.example</groupId>
<artifactId>cloud-api-conmmon</artifactId>
<version>1.0-SNAPSHOT</version>
</dependency>
<!--springcloud-config-client-->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-config</artifactId>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework.cloud/spring-cloud-starter-netflix-eureka-client -->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>
<!--SpringBoot熱部署配置 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<executions>
<execution>
<goals>
<goal>repackage</goal>
</goals>
</execution>
</executions>
<configuration>
<fork>true</fork>
</configuration>
</plugin>
</plugins>
</build>
</project>
bootstrap.yml
server:
port: 3355
spring:
application:
name: config-client
cloud:
config:
label: main
name: application
profile: dev
uri: http://localhost:3344
eureka:
client:
service-url:
defaultZone: http://localhost:7001/eureka
啟動類
@SpringBootApplication
@EnableEurekaClient
public class ConfigClientApplication {
public static void main(String[] args) {
SpringApplication.run(ConfigClientApplication.class,args);
}
}
編寫controller獲取github application-dev.yml的內容
@RestController
@RequestMapping("/client")
public class ConfigClientController {
@Value("${config.info}")
private String configInfo;
@GetMapping("/getConfigInfo")
public String getConfigInfo(){
return configInfo;
}
}
測試http://localhost:3355/client/getConfigInfo
發現問題，當github 上application-dev.yml的內容發生改變後，在不重啟服務的情況下，服務端3344內容可以實時更新，但是3355獲得的內容沒有發生改變。只有重啟3355客戶端才會重新整理改變
Config客戶端之動態重新整理
cloud-config-client-3355客戶端
pom檔案加入依賴
<!--config客戶端動態重新整理需要引入的-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
修改bootstrap.yml配置檔案暴露埠
server:
port: 3355
spring:
application:
name: config-client
cloud:
config:
label: main
name: application
profile: dev
uri: http://localhost:3344
eureka:
client:
service-url:
defaultZone: http://localhost:7001/eureka
#暴露埠
management:
endpoints:
web:
exposure:
include: "*"
controller添加註解@RefreshScope
@RestController
@RequestMapping("/client")
@RefreshScope
public class ConfigClientController {
@Value("${config.info}")
private String configInfo;
@GetMapping("/getConfigInfo")
public String getConfigInfo(){
return configInfo;
}
}
一切搞好之後重啟服務，然後修改github上配置檔案的內容，在訪問http://localhost:3355/client/getConfigInfo內容還是沒有更新
這時需要先發送一次post請求，http://localhost:3355/actuator/refresh重新整理一下服務
再次請求
內容已經發生了改變