(16) Integrate Spring Cloud architecture-refresh configuration with spring Cloud bus

We made the B2B2C e-commerce system with the spring Cloud distributed micro-service cloud architecture, in addition to the architecture itself with the system services, we have B2B2C business services to a fine-grained split, made a different business microservices.

As our business systems become more and more complex, the variety of configurations increases. As soon as a configuration file is modified, the Commonservice-config Configuration center stops the service and then restarts, finally making the configuration effective.

If the service is small, we can start it manually, but there must be some impact on the stability of the business and the system.

If hundreds of thousands of services are done by hand, I estimate that OPS or technicians will go insane.

In response to the above issues, the Commonservice-config server and the business microservices are configured separately, and the server is responsible for configuring the configuration files stored in git (SVN or local file system) (we use a local configuration scheme, Easy to update the configuration file directly to Linux),

The business microservices are configured to get the relevant configuration from the server-side configuration center, and if the configuration file changes, the latest configuration information is obtained by refreshing the business micro-service.

Spring Cloud Bus connects the nodes of a distributed system through a lightweight message broker. This can be used for broadcast state changes (such as configuration changes) or other management directives.

Next, we'll implement a dynamic refresh of the server configuration through the Spring Cloud bus scenario, with the following steps:

1. Commonservice-config service configuration can refer to the previous

2. Business Micro-service configuration (take Honghu-member-servcie member service as an example):

Pom File configuration:

<span style= "FONT-SIZE:16PX;" >        <dependency>            <groupId>org.springframework.boot</groupId>            <artifactId> <span style= "FONT-SIZE:16PX;" >spring-boot-starter-actuator</span></artifactId>        </dependency>            <dependency >         <groupId>org.springframework.cloud</groupId>             <artifactid><span style= " font-size:16px; " >spring-cloud-starter-bus-amqp</span></artifactId>    </dependency></span>

YML File configuration:

<span style= "FONT-SIZE:16PX;" >Server:port:5012Spring:application:name:honghu-member-client profiles:active:dev,discoveryclient cloud:config:discovery:enabled:trueService-id:commonservice-config-Server<span style= "color: #ff0000;" ><strong>name:honghu-member Profile:dev bus:trace:enabled:true#开启消息跟踪 </strong> <strong>Rabbitmq:host:192.168.1.254Port:5672Username:honghu Password:honghu</strong> </span>eureka:client:serviceUrl:defaultZone:http://Honghu:[email protected]:8761/eureka/Instance:prefer-ip-address:trueLogging:level:root:INFO org.springframework.security:INFOmanagement:security:enabled:falsesecurity:basic:enabled:false</span>

Write a test Class (Membercontroller.java) to get the configuration items

<span style= "FONT-SIZE:16PX;" > PackageCom.honghu.cloud.controller;ImportOrg.springframework.beans.factory.annotation.Value;ImportOrg.springframework.cloud.context.config.annotation.RefreshScope;Importorg.springframework.web.bind.annotation.GetMapping;ImportOrg.springframework.web.bind.annotation.RestController;<strong> @RefreshScope </strong>@RestController Public classMembercontroller {@Value ("${profile}")    PrivateString profile; @GetMapping ("/profile")     PublicString GetProfile () {return  This. Profile; }}</span>

3. Check the registration center, Commonservice-config, Honghu-member-service Service has been registered successfully

4. Access profile to obtain configuration information (original configuration):

Visit Http://localhost:7071/profile = = "Access results: 123456

5. Modify the configuration file in Config Configuration Center to change the profile=123456 to honghu123456

Visit Http://localhost:7071/profile = = "Access results: 123456

6. Use the Spring Cloud Bus refresh scenario (test with the Post Man Test tool)

Http://localhost:7071/bus/refresh

Visit Http://localhost:7071/profile = = "Access Result: honghu123456

To this, the entire Commonservice-config Configuration Center dynamic Refresh solution finished!

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(16) Integrate Spring Cloud architecture-refresh configuration with spring Cloud bus