springcloud配置中心CONFIG自动刷新

配置中心自动刷新的工作原理：

在git上修改配置文件，通过远程git配置的webhooks地址，通知本地，刷新本地缓存的配置信息，客户端调用配置

 

1.服务端配置（就是Config配置中心）

下面是我的config pom.xml,可以参考一下

<?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">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.5.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>ppc</groupId>
    <artifactId>config</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>config</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
        <spring-cloud.version>Greenwich.SR1</spring-cloud.version>
    </properties>

    <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>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-bus-amqp</artifactId>
        </dependency>
    </dependencies>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

2.配置中心启动类上加注解

@SpringBootApplication
@EnableDiscoveryClient 
@EnableConfigServer //
public class ConfigApplication {

    public static void main(String[] args) {
        SpringApplication.run(ConfigApplication.class, args);
    }

}

3.在config配置文件配置git地址

git信息、mq信息、注册中心、打开刷新本地git缓存开关

spring:
  application:
    name: config
  cloud:
    config:
      server:
        git:
          uri: https://github.com/******/springcloud.git //git地址
          username: *********@163.com //账号
          password: ******** //密码
    bus:
      trace:
        enabled: true
  rabbitmq: //rabbitmq
    host: 192.168.38.133
    port: 5672
    username: guest
    password: guest
eureka: //注册中心
  client:
    service-url:
      defaultZone: http://localhost:8761/eureka/
management: //打开刷新本地git仓库开关
  endpoints:
    web:
      exposure:
        include: "*"

4.在github上传配置文件，这个命名是有要求的是后面客户端的服务名加其他

/{name}-{profile}.yml
/{label}-{name}-{profile}.yml

name:即spring.application.name

profile: **的剖面

label: git分支,默认是master

5.客户端添加依赖，下面是我的pom仅供参考

<?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">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.5.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>fg</groupId>
    <artifactId>testfeign</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>testfeign</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
        <spring-cloud.version>Greenwich.SR1</spring-cloud.version>
        <product-client.version>0.0.1-SNAPSHOT</product-client.version>
        <order-common.version>0.0.1-SNAPSHOT</order-common.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.8</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-config-client</artifactId>
        </dependency>
        <dependency>
            <groupId>com.google.code.gson</groupId>
            <artifactId>gson</artifactId>
            <version>2.8.5</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-bus-amqp</artifactId> <!--添加依赖-->
        </dependency>
    </dependencies>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

6.配置客户端配置文件，配置中心信息等，并把文件名改成bootstrap.yml，如果不改有些配置会在加载配置中心文件之前加载，却找不到配置项，例如数据库配置 

此处寻找的配置文件名字 ：order-dev

spring:
  application:
    name: order
  cloud:
    config:
      discovery:
        enabled: true
        service-id: CONFIG //配置中心
      profile: dev //此处寻找的配置文件名字 ：order-dev
  rabbitmq:
    host: 192.168.38.133
    port: 5672
    username: guest
    password: guest
server:
  port: 8083

7.在代码中获取配置信息

这是git上的配置信息

第一种 ：在类上加@RefreshScope注解

@RestController
@RefreshScope
public class EnvController {

    @Value("${env}")//env是配置名
    private String env;

    @GetMapping("/print")
    public String print() {
        return env;
    }
}

第二种 

加注解@ConfigurationProperties("girl") 找到对应配置
@RefreshScope 刷新配置值

@Data
@Component
@ConfigurationProperties("girl")
@RefreshScope
public class GirlConfig {

    private String name;

    private int age;
}

8.配置webhooks

在settings里面找到Webhooks

添加地址（本地localhost不能用，可以用natapp免费版映射一下）