SpringCloud config分布式配置中心
分布式系统面临的配置问题
springcloud听过的config可以完美的解决上述的问题，springcloud config是什么
是什么
怎么玩‘
能干嘛
集中管理配置文件
不同环境不同配置，动态化的配置更新，分环境部署比如dev/test/prod/beta/release
运行期间动态调整配置，不再需要在每个服务部署的机器上编写配置文件，服务会向配置中心统一拉取配置自己的信息
当配置发生变动时，服务不需要重启即可感知到配置的变化并应用新的配置
将配置信息以REST接口的形式暴露
与Github整合配置
由于SpringCloud Config默认使用Git来存储配置文件（也有其它方式，比如支持svn和本地文件，但最推荐的还是Git，而且使用的是http/https访问的形式）
Config服务端配置与测试
在自己的github创建一个仓库，并在本地下载
这些前提条件搞好了之后创建cloud-config-center-3344服务端
pom文件引入依赖
<?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热部署配置 -->
<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
启动类
@SpringBootApplication
@EnableConfigServer
public class ConfigCenterApplicaton3344 {
public static void main(String[] args) {
SpringApplication.run(ConfigCenterApplicaton3344.class,args);
}
}
测试http://localhost:3344/main/application-dev.yml
Config客户端配置与测试 创建cloud-config-client-3355客户端
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热部署配置 -->
<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
启动类
@SpringBootApplication
@EnableEurekaClient
public class ConfigClientApplication {
public static void main(String[] args) {
SpringApplication.run(ConfigClientApplication.class,args);
}
}
编写controller获取github application-dev.yml的内容
@RestController
@RequestMapping("/client")
public class ConfigClientController {
@Value("${config.info}")
private String configInfo;
@GetMapping("/getConfigInfo")
public String getConfigInfo(){
return configInfo;
}
}
测试http://localhost:3355/client/getConfigInfo
发现问题，当github 上application-dev.yml的内容发生改变后，在不重启服务的情况下，服务端3344内容可以实时更新，但是3355获得的内容没有发生改变。只有重启3355客户端才会刷新改变
Config客户端之动态刷新
cloud-config-client-3355客户端
pom文件加入依赖
<!--config客户端动态刷新需要引入的-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
修改bootstrap.yml配置文件暴露端口
server:
port: 3355
spring:
application:
name: config-client
cloud:
config:
label: main
name: application
profile: dev
uri: http://localhost:3344
eureka:
client:
service-url:
defaultZone: http://localhost:7001/eureka
#暴露端口
management:
endpoints:
web:
exposure:
include: "*"
controller添加注解@RefreshScope
@RestController
@RequestMapping("/client")
@RefreshScope
public class ConfigClientController {
@Value("${config.info}")
private String configInfo;
@GetMapping("/getConfigInfo")
public String getConfigInfo(){
return configInfo;
}
}
一切搞好之后重启服务，然后修改github上配置文件的内容，在访问http://localhost:3355/client/getConfigInfo内容还是没有更新
这时需要先发送一次post请求，http://localhost:3355/actuator/refresh刷新一下服务
再次请求
内容已经发生了改变
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