1.spring cloud config是什么

  官网:https://cloud.spring.io/spring-cloud-static/spring-cloud-config/2.2.1.RELEASE/reference/html/

  Spring Cloud Config项目是一个解决分布式系统的配置管理方案。它包含了Client和Server两个部分,server提供配置文件的存储、以接口的形式将配置文件的内容提供出去,client通过接口获取数据、并依据此数据初始化自己的应用

  

2.使用

  实际使用过程中,我们把配置文件放在git上面,创建一个config的server端,实时同步git上的配置文件。再把配置文件的内容以接口的形式提供除去。client去获取server的配置数据。

2.1在git上创建一个项目

  里面放入配置文件,我这里有三个配置文件。注意文件的命名格式。

 

 

2.2创建一个模块作为server

 

2.2.1 依赖

<dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-config-server</artifactId>
 </dependency>

完整依赖

<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.atguigu.springcloud</groupId>
            <artifactId>cloud-api-commons</artifactId>
            <version>${project.version}</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-web -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-web  -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-devtools -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.projectlombok/lombok -->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-test -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

    </dependencies>

 

2.2.2配置文件

 

server:
  port: 3344

eureka:
  client:
    service-url:
      defaultZone: http://eureka7001.com:7001/eureka,http://eureka7002.com:7002/eureka  #集群版

spring:
  application:
    name: config-server
  cloud:
    config:
      server:
        git:
          uri: https://gitee.com/xxx/sprincloud-config.git #git仓库路径
          search-paths:
            - springcloud-config  #搜索路径
          username: xx
          password: xxx
      label: master

 

cloud.config.server.git:
  uri:配置文件项目的git的地址
  searc-paths:搜索路径,如下图
  

 

     username:git用户名

     password:git密码

  label:分支,如下图

    

 

 2.2.3主启动类

  注解 @EnableConfigServer

package com.atguigu.springcloud;


import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.config.server.EnableConfigServer;
import org.springframework.cloud.netflix.hystrix.EnableHystrix;


@SpringBootApplication
@EnableConfigServer
public class ConfigCenterMain3344 {
    public static void main(String[] args) {
        SpringApplication.run(ConfigCenterMain3344.class,args);
    }

}

 

2.2.4测试

  访问三个配置文件,都访问到了

  

 

 

  

2.3创建一个client端-也就是需要使用server端配置内容的服务

 

2.3.1pom文件

 <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-config</artifactId>
        </dependency>

完整依赖

<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.atguigu.springcloud</groupId>
            <artifactId>cloud-api-commons</artifactId>
            <version>${project.version}</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-web -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-web  -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-devtools -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.projectlombok/lombok -->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-test -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>


    </dependencies>

 

2.3.2配置文件

  注意文件名称为:bootstrap.yml
  
server:
  port: 3355

eureka:
  client:
    service-url:
      defaultZone: http://eureka7001.com:7001/eureka,http://eureka7002.com:7002/eureka  #集群版

spring:
  application:
    name: config-client
  cloud:
    config:
      label: master #分支名称
      name: config #配置文件名称
      profile: dev #读取配置文件的后缀名称
      uri: http://localhost:3344 #这几个组合就是 http://localhost:3344/master/config-dev.yml
cloud.config:
  label 分支名称
  name 配置文件名称
  profile 配置文件后缀名称
  uri:server地址
这几个配置合起来就是: http://localhost:3344/master/config-dev.yml


2.3.3 主启动类
  
package com.atguigu.springcloud;


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


@SpringBootApplication
@EnableEurekaClient
public class ConfigCenterMain3355 {
    public static void main(String[] args) {
        SpringApplication.run(ConfigCenterMain3355.class,args);
    }

}

2.3.4 业务类

 

package com.atguigu.springcloud.controller;

import com.atguigu.springcloud.entities.CommonResult;
import com.atguigu.springcloud.entities.Payment;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.cloud.context.config.annotation.RefreshScope;
import org.springframework.web.bind.annotation.*;

import javax.annotation.Resource;
import java.util.List;
import java.util.concurrent.TimeUnit;

@RestController
@Slf4j
public class PaymentController {

    @Value("${config.info}")
    private String configInfo;  //这里config.info是读取配置中心的配置

    @GetMapping("/configInfo")
    public String getConfigInfo(){
    return configInfo;
     }
}

 

  

 

 2.3.5测试

  表示配置读取成功

 

2.4若git上配置文件发生变化

2.4.1在git上修改config-dev的内容

 

 2.4.2访问server

  自动完成同步

 

 2.4.3访问client

  没有自动同步,只有重启client才完成同步

 

2.5自动同步配置

2.5.1在client加入依赖,加入actuator监控

  前面已经添加了

 <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>

 

2.5.2配置文件

加入以下配置,暴露监控端点

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

完整

server:
  port: 3355

eureka:
  client:
    service-url:
      defaultZone: http://eureka7001.com:7001/eureka,http://eureka7002.com:7002/eureka  #集群版

spring:
  application:
    name: config-client
  cloud:
    config:
      label: master #分支名称
      name: config #配置文件名称
      profile: dev #读取配置文件的后缀名称
      uri: http://localhost:3344 #这几个组合就是 http://localhost:3344/master/config-dev.yml

#暴露监控端点
management:
  endpoints:
    web:
      exposure:
        include: "*"

 

2.5.3在业务类加入注解@RefreshScope - 刷新配置

 

package com.atguigu.springcloud.controller;

import com.atguigu.springcloud.entities.CommonResult;
import com.atguigu.springcloud.entities.Payment;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.cloud.context.config.annotation.RefreshScope;
import org.springframework.web.bind.annotation.*;

import javax.annotation.Resource;
import java.util.List;
import java.util.concurrent.TimeUnit;

@RestController
@Slf4j
@RefreshScope //刷新配置
public class PaymentController {

    @Value("${config.info}")
    private String configInfo;

    @GetMapping("/configInfo")
    public String getConfigInfo(){
    return configInfo;
     }
}

 

2.5.4在修改配置文件后,需向client发送一个POST请求

  http://localhost:3355/actuator/refresh

 

2.5.5测试

 修改配置文件

  

发送post请求

 

 

 

 访问server,配置内容已更新

 

访问client,配置内容已更新

2.6还存在的缺陷

  每次修改配置都需要向client发送post请求,如果存在多个client,就比较麻烦。这里就用到spring cloud bus。config和bus是相互配合的好搭档,一般都是一起使用。

 

 3.使用spring cloud bus

3.1基本说明

  Spring Cloud Bus 对自己的定位是 Spring Cloud 体系内的消息总线,使用 message broker 来连接分布式系统的所有节点。

  bus有两种通知方式

  方式1:

    bus通知一个client,再有client把消息通知给其他client

 

 

 

  方式2:

  bus通知config的server端,再由server端通知client

 

方式二的架构显然更加合适,方式一不适合的原因如下:

  打破了微服务的职责单一性,因为微服务本身是业务模块,它本不应该承担配置刷新职责

  破坏了微服务各节点的对等性

  有一定的局限性。例如,微服务在迁移时,它的网络地址常常会发生变化,此时如果想要做到自动刷新,那就会增加更多的修改

所以我们采取方式二

 

3.1环境准备

  spring cloud bus不需具备Rabbitmq或者kafka

   RabbitMq安装:https://www.cnblogs.com/jthr/p/13786746.html

3.2修改cloud-config-center-3344

3.2.1 添加依赖

<dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-bus-amqp</artifactId>
        </dependency>

完整

<dependencies>


        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-config-server</artifactId>
        </dependency>


        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-bus-amqp</artifactId>
        </dependency>



        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>


        <dependency>
            <groupId>com.atguigu.springcloud</groupId>
            <artifactId>cloud-api-commons</artifactId>
            <version>${project.version}</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-web -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-web  -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-devtools -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.projectlombok/lombok -->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-test -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

    </dependencies>

3.2.2配置文件添加

  rabbitmq:
    host: localhost  #rabbitmq地址
    port: 5672      #端口
    username: guest #账号
    password: guest #密码

management:   #暴露bus刷新的端点
  endpoints:
    web:
      exposure:
        include: bus-refresh

完整

server:
  port: 3344

eureka:
  client:
    service-url:
      defaultZone: http://eureka7001.com:7001/eureka,http://eureka7002.com:7002/eureka  #集群版

spring:
  application:
    name: config-server
  cloud:
    config:
      server:
        git:
          uri: https://gitee.com/xxx/sprincloud-config.git #git仓库路径
          search-paths:
            - springcloud-config  #搜索路径
          username: xxx
          password: xxx
      label: master


  rabbitmq:
    host: localhost  #rabbitmq地址
    port: 5672      #端口
    username: guest #账号
    password: guest #密码

management:   #暴露bus刷新的端点
  endpoints:
    web:
      exposure:
        include: bus-refresh

 

3.3修改cloud-config-client-3355

3.3.1添加依赖

<dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-bus-amqp</artifactId>
        </dependency>

完整

<dependencies>


        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-config</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-bus-amqp</artifactId>
        </dependency>


        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-bus-amqp</artifactId>
        </dependency>


        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>


        <dependency>
            <groupId>com.atguigu.springcloud</groupId>
            <artifactId>cloud-api-commons</artifactId>
            <version>${project.version}</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-web -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-web  -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-devtools -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.projectlombok/lombok -->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-test -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>


    </dependencies>

3.3.2配置文件添加

 

  rabbitmq:
    host: localhost
    port: 5672
    username: guest
    password: guest

完整

server:
  port: 3355

eureka:
  client:
    service-url:
      defaultZone: http://eureka7001.com:7001/eureka,http://eureka7002.com:7002/eureka  #集群版

spring:
  application:
    name: config-client
  cloud:
    config:
      label: master #分支名称
      name: config #配置文件名称
      profile: dev #读取配置文件的后缀名称
      uri: http://localhost:3344 #这几个组合就是 http://localhost:3344/master/config-dev.yml

  rabbitmq:
    host: localhost
    port: 5672
    username: guest
    password: guest

#暴露监控端点

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

 

3.4新建cloud-config-client-3366

  前面有了cloud-config-client-3355,这里新建一个3366,这样子就有两个client,演示效果更好。

   3366和3355内容除了端口号,其它一模一样

3.4.1新建

 

3.4.2pom文件依赖

<dependencies>


        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-config</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-bus-amqp</artifactId>
        </dependency>


        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>


        <dependency>
            <groupId>com.atguigu.springcloud</groupId>
            <artifactId>cloud-api-commons</artifactId>
            <version>${project.version}</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-web -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-web  -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-devtools -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.projectlombok/lombok -->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-test -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>


    </dependencies>

 

3.4.3配置文件

名字:bootstrap.yml

server:
  port: 3366

eureka:
  client:
    service-url:
      defaultZone: http://eureka7001.com:7001/eureka,http://eureka7002.com:7002/eureka  #集群版

spring:
  application:
    name: config-client
  cloud:
    config:
      label: master #分支名称
      name: config #配置文件名称
      profile: dev #读取配置文件的后缀名称
      uri: http://localhost:3344 #这几个组合就是 http://localhost:3344/master/config-dev.yml

  rabbitmq:
    host: localhost
    port: 5672
    username: guest
    password: guest


#暴露监控端点
management:
  endpoints:
    web:
      exposure:
        include: "*"

 

3.4.4主启动类

 

package com.atguigu.springcloud;


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


@SpringBootApplication
@EnableEurekaClient
public class ConfigCenterMain3366 {
    public static void main(String[] args) {
        SpringApplication.run(ConfigCenterMain3366.class,args);
    }

}

 

3.4.5业务类

package com.atguigu.springcloud.controller;

import lombok.extern.slf4j.Slf4j;
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
@Slf4j
@RefreshScope //刷新配置
public class PaymentController {

    @Value("${config.info}")
    private String configInfo;

    @GetMapping("/configInfo")
    public String getConfigInfo(){
    return configInfo;
     }
}

 

3.5测试

  启动项目

3.5.1访问

   访问server3344

  

  访问3355

 

   

  访问3366

 

3.5.3修改git上的配置文件

 

3.5.4发送POST请求

http://localhost:3344/actuator/bus-refresh

 

3.5.5再次访问

  配置内容已经自动更新

 

 

 

 

 

 

 

 3.5.6说明

  上面的测试说明,在修改git上配置文件后,只需要发送一次POST请求到server,所有的client会更新配置文件内容。这样子就不用去对每个client端发送POST请求了。

3.6差异化通知

  如果我们只需要部分client更新而不是全部client更新,该怎么做,只需要对发送的POST请求进行修改

3.5.1修改git上配置文件

 

 

 

 

3.5.2发送POST请求

http://localhost:3344/actuator/bus-refresh/config-client:3355

config-client:微服务名称   3355:端口号

 

 

3.5.3再次访问

 

 

 

 

 

 

 

 

 

 

 

 server3344和client3355都更新了,client3366没有更新