SpringCloud-Config

一、介绍

（1）服务注册中心
（2）管理各个服务上的application.yml，支持动态修改，但不会影响客户端配置
（3）一般将application.yml文件放在git上，客户端通过http/https方式拉取

二、项目搭建

（1）建个远程仓库，创建两个配置文件application.yml

（2）编写pom.xml

<?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>demo20220821</artifactId>
        <groupId>com.wsh.springcloud</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>cloud-config-config3344</artifactId>

    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-config-server</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>
        <dependency>
            <groupId>com.wsh.springcloud</groupId>
            <artifactId>cloud-api-common</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>
</project>

（3）编写application.yml文件

server:
  port: 3344

spring:
  application:
    name: cloud-config-service
  cloud:
    config:
      server:
        git:
          uri: https://gitee.com/xxx/config.git
      label: master

eureka:
  client:
    #    客户端设置为true
    register-with-eureka: true
    #    客户端设置为true
    fetch-registry: true
    service-url:
      #      defaultZone: http://localhost:7001/eureka
      defaultZone: http://eureka1.com:7001/eureka, http://eureka2.com:7002/eureka
  instance:
    instance-id: config3344
    prefer-ip-address: true

（4）编写启动类

package com.wsh.springcloud;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.config.server.EnableConfigServer;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;

/**
 * @ClassName ConfigMain3344
 * @Description: TODO
 * @Author wshaha
 * @Date 2023/10/15
 * @Version V1.0
 **/
@SpringBootApplication
@EnableEurekaClient
@EnableConfigServer
public class ConfigMain3344 {
    public static void main(String[] args) {
        SpringApplication.run(ConfigMain3344.class, args);
    }
}

（5）运行

三、客户端读取

（1）application.yml是用户级的，bootstrap.yml是系统级的，优先级更高
（2）编写pom.xml

<?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>demo20220821</artifactId>
        <groupId>com.wsh.springcloud</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>cloud-config-client3355</artifactId>

    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-config</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>
        <dependency>
            <groupId>com.wsh.springcloud</groupId>
            <artifactId>cloud-api-common</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>
</project>

（3）编写bootstrap.yml

server:
  port: 3355

spring:
  application:
    name: cloud-config-client-service
  cloud:
    config:
      label: master #分支名
      name: application # - 号前缀
      profile: prod # - 号后缀
      uri: http://localhost:3344 #配置中心地址

eureka:
  client:
    #    客户端设置为true
    register-with-eureka: true
    #    客户端设置为true
    fetch-registry: true
    service-url:
      #      defaultZone: http://localhost:7001/eureka
      defaultZone: http://eureka1.com:7001/eureka, http://eureka2.com:7002/eureka
  instance:
    instance-id: configClient3355
    prefer-ip-address: true

（4）编写启动类

package com.wsh.springcloud;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;

/**
 * @ClassName ConfigMain3344
 * @Description: TODO
 * @Author wshaha
 * @Date 2023/10/15
 * @Version V1.0
 **/
@SpringBootApplication
@EnableEurekaClient
public class ConfigClientMain3355{
    public static void main(String[] args) {
        SpringApplication.run(ConfigClientMain3355.class, args);
    }
}

（5）编写Controller

package com.wsh.springcloud.controller;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * @ClassName ConfigClientController
 * @Description: TODO
 * @Author wshaha
 * @Date 2023/10/15
 * @Version V1.0
 **/
@RestController
public class ConfigClientController {

    @Value("${teset.name}")
    private String name;

    @RequestMapping("/getConfig")
    public String getConfig(){
        return name;
    }
}

（6）运行

四、手动刷新客户端配置

（1）暴露actuator

server:
  port: 3355

spring:
  application:
    name: cloud-config-client-service
  cloud:
    config:
      label: master #分支名
      name: application # - 号前缀
      profile: prod # - 号后缀
      uri: http://localhost:3344 #配置中心地址

eureka:
  client:
    #    客户端设置为true
    register-with-eureka: true
    #    客户端设置为true
    fetch-registry: true
    service-url:
      #      defaultZone: http://localhost:7001/eureka
      defaultZone: http://eureka1.com:7001/eureka, http://eureka2.com:7002/eureka
  instance:
    instance-id: configClient3355
    prefer-ip-address: true

management:
  endpoints:
    web:
      exposure:
        include: "*"

（2）Controller增加注解@RefreshScope

package com.wsh.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.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * @ClassName ConfigClientController
 * @Description: TODO
 * @Author wshaha
 * @Date 2023/10/15
 * @Version V1.0
 **/
@RestController
@RefreshScope
public class ConfigClientController {

    @Value("${teset.name}")
    private String name;

    @RequestMapping("/getConfig")
    public String getConfig(){
        return name;
    }
}

（3）执行命令，必须是POST请求

curl -X POST "http://localhost:3355/actuator/refresh"