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一、介绍

（1）bus搭配config可以实现客户端配置自动刷新
（2）bus支持两种消息代理，rabbitmq和kafka
（3）使用topic模式分发消息

二、项目搭建（广播）

（1）客户端和服务配置中心pom.xml增加依赖

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

（2）修改客户端的bootstrap.yml，添加rabbitmq配置、暴露actuator的refresh端点

server:port: 3355spring:application:name: cloud-config-client-servicecloud: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rabbitmq:host: 192.168.0.166port: 5672username: guestpassword: guesteureka:client:#    客户端设置为trueregister-with-eureka: true#    客户端设置为truefetch-registry: trueservice-url:#      defaultZone: http://localhost:7001/eurekadefaultZone: http://eureka1.com:7001/eureka, http://eureka2.com:7002/eurekainstance:instance-id: configClient3355prefer-ip-address: truemanagement:endpoints:web:exposure:include: "*"

（3）修改配置中心服务端的bootstrap.yml，暴露actuator的bus-refresh端点

server:port: 3344spring:application:name: cloud-config-servicecloud:config:server:git:uri: https://gitee.com/feifanwsh/config.gitlabel: masterrabbitmq:host: 192.168.0.166port: 5672username: guestpassword: guesteureka:client:#    客户端设置为trueregister-with-eureka: true#    客户端设置为truefetch-registry: trueservice-url:#      defaultZone: http://localhost:7001/eurekadefaultZone: http://eureka1.com:7001/eureka, http://eureka2.com:7002/eurekainstance:instance-id: config3344prefer-ip-address: truemanagement:endpoints:web:exposure:include: "bus-refresh"

（4）运行

curl -X POST "http://localhost:3344/actuator/bus-refresh"

三、单播

运行

curl -X POST "http://localhost:3344/actuator/bus-refresh/服务名:端口号"