springcloud实战之14动态刷新分布式配置中心属性配置（config）

深碍√TFBOYSˉ_ 2022-06-03 07:09 268阅读 1赞

[springcloud实战之10 分布式配置中心（config）][springcloud_10 _config]介绍了如何用spring cloud config和git仓库读取配置文件，当配置文件里的属性发生变化，按照以往的惯例，必须重启服务才能够读取到新的配置属性。但springcloud config为我们提供了springcloud bus（消息总线）能够实现动态刷新配置文件。

## 重构（springcloud-server-config）工程 ##

### 添加依赖 ###

<parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.9.RELEASE</version>
        <relativePath />
    </parent>
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Edgware.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-config-server</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-eureka</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-bus-amqp</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
    </dependencies>

### 改造入口类 ###

@SpringBootApplication
    @EnableConfigServer
    @EnableDiscoveryClient
    public class SpringCloudServerConfigApplication { 
        public static void main(String[] args) {
            SpringApplication.run(SpringCloudServerConfigApplication.class,args) ;
        }
    }

### 修改配置文件 ###

server:
      port: 8001
    management:
      security:
        enabled: false
    spring:
      application:
        name: springcloud-server-config
      cloud:
        config:
          server:
            git:
              uri: https://github.com/shiyuan2he/springcloud
              search-paths: springcloud-repo-config
              username:
              password:
              force-pull: true
          label: master
      rabbitmq:
        host: 192.168.175.128
        port: 5672
        username: admin
        password: admin
    eureka:
      client:
        service-url:
          defaultZone: http://peer1:8080/eureka/

## 重构springcloud-service-config项目 ##

### 添加依赖 ###

<parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.9.RELEASE</version>
        <relativePath />
    </parent>
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Edgware.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-config</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-eureka</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-bus-amqp</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
    </dependencies>

### 重构入口类 ###

@SpringBootApplication
    @EnableDiscoveryClient
    public class SpringCloudServiceConfigApplication { 
        public static void main(String[] args) {
            SpringApplication.run(SpringCloudServiceConfigApplication.class,args) ;
        }
    }

### 改造web层接口 ###

@RestController
    @RefreshScope
    @RequestMapping(value = "/api/rest")
    public class RestfulController { 
    
        @Value("${user.name}")
        String name;
        @Value("${user.age}")
        String age ;
    
        @GetMapping("/name")
        public String getName(){
            return name +":"+ age;
        }
    }

### 新建配置文件bootstrap.properties ###

spring.application.name=springcloud-service-config
    spring.cloud.config.label=master
    spring.cloud.config.profile=dev
    spring.cloud.config.uri= http://localhost:8001/
    server.port=8003
    
    eureka.client.serviceUrl.defaultZone=http://peer1:8080/eureka/
    ## 从配置中心读取文件
    spring.cloud.config.discovery.enabled=true
    ## 配置中心的servieId，即服务名。
    spring.cloud.config.discovery.serviceId=springcloud-server-config
    spring.cloud.config.fail-fast=true
    
    spring.rabbitmq.host=192.168.175.128
    spring.rabbitmq.port=5672
    spring.rabbitmq.username=admin
    spring.rabbitmq.password=admin
    
    management.security.enabled=false

## 启动项目 ##

1.启动服务注册中心集群（springcloud-server-eureka）

2.启动服务配置中心（springcloud-server-config）

3.启动springcloud-service-config集群

启动后的服务注册图如下:

![这里写图片描述][SouthEast]

分别调用两个读取配置文件得集群：

![这里写图片描述][SouthEast 1]

![这里写图片描述][SouthEast 2]

去github仓库修改配置文件，并访问之前的集群服务，还没有立马生效

![这里写图片描述][SouthEast 3]

调用[http://localhost:8001/bus/refresh][http_localhost_8001_bus_refresh] 接口刷新配置中心服务

![这里写图片描述][SouthEast 4]

再次查看集群服务，如下图

![这里写图片描述][SouthEast 5]

![这里写图片描述][SouthEast 6]

## 源码 ##

[springcloud-server-eureka][]

[springcloud-server-config][]

[springcloud-service-config][]

## 历史文章 ##

[springcloud实战之1 技术选型：dubbo还是springcloud][springcloud_1 _dubbo_springcloud]

[springcloud实战之2 服务注册与发现（eureka实现）][springcloud_2 _eureka]

[springcloud实战之3 高可用服务注册中心（eureka集群）][springcloud_3 _eureka]

[springcloud实战之5 服务消费者（ribbon）][springcloud_5 _ribbon]

[springcloud实战之6 服务消费者（Feign）][springcloud_6 _Feign]

[springcloud实战之7 断路器（Hystrix）][springcloud_7 _Hystrix]

[springcloud实战之8 断路器-仪表盘-单例监控（Hystrix）][springcloud_8 _-_-_Hystrix]

[springcloud实战之9断路器-集群监控（turbine）][springcloud_9_-_turbine]

[springcloud实战之10 分布式配置中心（config）][springcloud_10 _config]

[springcloud实战之11路由网关（zuul）][springcloud_11_zuul]

[springcloud实战之12 路由网关拦截器][springcloud_12]

[springcloud实战之13 rabbitmq消息总线（bus）][springcloud_13 rabbitmq_bus]

[springcloud_10 _config]: http://blog.csdn.net/u012806787/article/details/78803198
[SouthEast]: /images/20220603/8720975a6818484185d7f123862307d7.png
[SouthEast 1]: /images/20220603/ca68465dae204f1886539135ca4c17eb.png
[SouthEast 2]: /images/20220603/08b1a8debb4a476e917322f529074816.png
[SouthEast 3]: /images/20220603/5d06868004f44297aec983d1fbfea487.png
[http_localhost_8001_bus_refresh]: http://localhost:8001/bus/refresh
[SouthEast 4]: /images/20220603/387cfc5c4ea24cbfaadbb9295d5aea13.png
[SouthEast 5]: /images/20220603/c169a0f9c71d414193406a8b7420d215.png
[SouthEast 6]: /images/20220603/7b533164677744549b66f97f9bea6fad.png
[springcloud-server-eureka]: https://github.com/shiyuan2he/springcloud/tree/master/springcloud-server-eureka
[springcloud-server-config]: https://github.com/shiyuan2he/springcloud/tree/master/springcloud-server-config
[springcloud-service-config]: https://github.com/shiyuan2he/springcloud/tree/master/springcloud-service-config
[springcloud_1 _dubbo_springcloud]: http://blog.csdn.net/u012806787/article/details/78789312
[springcloud_2 _eureka]: http://blog.csdn.net/u012806787/article/details/78790958
[springcloud_3 _eureka]: http://blog.csdn.net/u012806787/article/details/78793639
[springcloud_5 _ribbon]: http://blog.csdn.net/u012806787/article/details/78796605
[springcloud_6 _Feign]: http://blog.csdn.net/u012806787/article/details/78798951
[springcloud_7 _Hystrix]: http://blog.csdn.net/u012806787/article/details/78801119
[springcloud_8 _-_-_Hystrix]: http://blog.csdn.net/u012806787
[springcloud_9_-_turbine]: http://blog.csdn.net/u012806787/article/details/78862637
[springcloud_11_zuul]: http://blog.csdn.net/u012806787/article/details/78863867
[springcloud_12]: http://blog.csdn.net/u012806787/article/details/78864281
[springcloud_13 rabbitmq_bus]: http://blog.csdn.net/u012806787/article/details/78864867