❝❞
- 微服务意味着要将单体应用中的业务拆分成一个个子服务,每个服务的粒度相对较小,因此系统中会出现大量的服务。由于每个服务都需要必要的配置信息才能运行,所以一套集中式的、动态的配置管理设施是必不可少的。
- SpringCloud提供了ConfigServer来解决这个问题,我们每一个微服务自己带着一个application.yml,上百个配置文件的管理......
- /(ㄒoㄒ)/~~
❝SpringCloud Config为微服务架构中的微服务提供集中化的外部配置支持,配置服务器为各个不同微服务应用的所有环境提供了一个中心化的外部配置。
❞
❝SpringCloud Config分为服务端和客户端两部分。
❞
git clone git@giteeGit:/kobebryant81/springcloud-config
giteeGit-->gitee.com
git clone [email protected]:kobebryant81/springcloud-config
❝新建Module模块cloud-config-center-3344作为Cloud的配置中心模块CloudConfig Center
❞
<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>cloud2023artifactId>
<groupId>top.ljzstudy.springcloudgroupId>
<version>1.0-SNAPSHOTversion>
parent>
<modelVersion>4.0.0modelVersion>
<artifactId>cloud-config-center-3344artifactId>
<dependencies>
<dependency>
<groupId>org.springframework.cloudgroupId>
<artifactId>spring-cloud-config-serverartifactId>
dependency>
<dependency>
<groupId>org.springframework.cloudgroupId>
<artifactId>spring-cloud-starter-netflix-eureka-clientartifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-webartifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-actuatorartifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-devtoolsartifactId>
<scope>runtimescope>
<optional>trueoptional>
dependency>
<dependency>
<groupId>org.projectlombokgroupId>
<artifactId>lombokartifactId>
<optional>trueoptional>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-testartifactId>
<scope>testscope>
dependency>
dependencies>
project>
server:
port: 3344
spring:
application:
name: cloud-config-center #注册进Eureka服务器的微服务名
cloud:
config:
server:
git:
# uri: git@giteeGit:/kobebryant81/springcloud-config #Gitee上面的git仓库名字
uri: https://gitee.com/kobebryant81/springcloud-config.git #Gitee上面的git仓库名字
####搜索目录
search-paths:
- springcloud-config
####读取分支
label: master
#服务注册到eureka地址
eureka:
client:
service-url:
defaultZone: http://localhost:7001/eureka
package top.ljzstudy.springcloud;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.config.server.EnableConfigServer;
@SpringBootApplication
@EnableConfigServer
public class ConfigCenterMain3344 {
public static void main(String[] args) {
SpringApplication.run(ConfigCenterMain3344.class, args);
}
}
127.0.0.1 config-3344.com
C:\Windows\System32\drivers
GET http://config-3344.com:3344/master/config-dev.yml
HTTP/1.1 200
Content-Type: text/plain
Content-Length: 74
Date: Wed, 20 Sep 2023 08:56:06 GMT
Keep-Alive: timeout=60
Connection: keep-alive
config:
info: master branch,springcloud-config/config-dev.yml version=6
Response code: 200; Time: 1359ms; Content length: 74 bytes
/{label}/{application}-{profile}.yml
(最为常用)
/{application}-{profile}.yml
(比较常用)
/{application}/{profile}[/{label}]
❝成功实现了用SpringCloud Config通过GitHub获取配置信息
❞
<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>cloud2023artifactId>
<groupId>top.ljzstudy.springcloudgroupId>
<version>1.0-SNAPSHOTversion>
parent>
<modelVersion>4.0.0modelVersion>
<artifactId>cloud-config-client-3355artifactId>
<dependencies>
<dependency>
<groupId>org.springframework.cloudgroupId>
<artifactId>spring-cloud-starter-configartifactId>
dependency>
<dependency>
<groupId>org.springframework.cloudgroupId>
<artifactId>spring-cloud-starter-netflix-eureka-clientartifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-webartifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-actuatorartifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-devtoolsartifactId>
<scope>runtimescope>
<optional>trueoptional>
dependency>
<dependency>
<groupId>org.projectlombokgroupId>
<artifactId>lombokartifactId>
<optional>trueoptional>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-testartifactId>
<scope>testscope>
dependency>
dependencies>
project>
❝❞
- applicaiton.yml是用户级的资源配置项
- bootstrap.yml是系统级的,优先级更加高
- Spring Cloud会创建一个“Bootstrap Context”,作为Spring应用的Application Context
的父上下文。初始化的时候,
Bootstrap Context负责从外部源加载配置属性并解析配置。这两个上下文共享一个从外部获取的
Environment`。Bootstrap
属性有高优先级,默认情况下,它们不会被本地配置覆盖。Bootstrap context
和Application Context
有着不同的约定,所以新增了一个bootstrap.yml文件,保证
Bootstrap Context和
Application Context`配置的分离。- 要将Client模块下的application.yml文件改为bootstrap.yml,这是很关键的,
- 因为bootstrap.yml是比application.yml先加载的。bootstrap.yml优先级高于application.yml
server:
port: 3355
spring:
application:
name: config-client
cloud:
#Config客户端配置
config:
label: master #分支名称
name: config #配置文件名称
profile: dev #读取后缀名称 上述3个综合:master分支上config-dev.yml的配置文件被读取http://config-3344.com:3344/master/config-dev.yml
uri: http://localhost:3344 #配置中心地址k
#服务注册到eureka地址
eureka:
client:
service-url:
defaultZone: http://localhost:7001/eureka
package top.ljzstudy.springcloud;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
@EnableEurekaClient
@SpringBootApplication
public class ConfigClientMain3355 {
public static void main(String[] args) {
SpringApplication.run(ConfigClientMain3355.class, args);
}
}
package top.ljzstudy.springcloud.controller;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.cloud.context.config.annotation.RefreshScope;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
@RefreshScope
public class ConfigClientController {
@Value("${config.info}")
private String configInfo;
@GetMapping("/configInfo")
public String getConfigInfo() {
return configInfo;
}
}
❝成功实现了客户端3355访问SpringCloud Config3344通过GitHub获取配置信息
❞
❝问题随时而来,分布式配置的动态刷新问题
❞
❝避免每次更新配置都要重启客户端微服务3355
❞
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-actuatorartifactId>
dependency>
# 暴露监控端点
management:
endpoints:
web:
exposure:
include: "*"
package top.ljzstudy.springcloud.controller;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.cloud.context.config.annotation.RefreshScope;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
@RefreshScope
public class ConfigClientController {
@Value("${config.info}")
private String configInfo;
@GetMapping("/configInfo")
public String getConfigInfo() {
return configInfo;
}
}
POST http://localhost:3355/actuator/refresh
HTTP/1.1 200
Content-Type: application/vnd.spring-boot.actuator.v3+json
Transfer-Encoding: chunked
Date: Wed, 20 Sep 2023 09:44:25 GMT
Keep-Alive: timeout=60
Connection: keep-alive
[
"config.client.version",
"config.info"
]
Response code: 200; Time: 6922ms; Content length: 39 bytes
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