Spring Cloud Alibaba Tutorials | Nacos (c)

Nacos use as a distribution center

We have already introduced a filter Nacos is easier to build dynamic cloud-native application service discovery, configuration management and service management platform. So it can be used as registration centers and distribution center, as a registration center Nacos allows us the flexibility to configure a variety of environmental parameters, so that the project does not require too much attention to target environmental problems during packaging, a packaged achieve the project, many running aims. Today we'll explain how to use Nacos as a distribution center.

Demo

The first step : Configure the list of menu options click Nacos management platform "+" sign a new configuration, click the Publish button after the new configuration.

Here Insert Picture Description

Configuration Rules

dataId: format $ {prefix} - $ {spring.profiles.active} $ {file-extension}.
The default value for the prefix spring.application.name
spring.profiles.active profile corresponding to the current environment
file-extension format for the configuration data content, may be configured by the configuration item spring.cloud.nacos.config.file-extension. Currently only type properties.

group 默认DEFAULT_GROUP

When activeprofile empty fill spring.application.name direct value to the default properties

Here Insert Picture Description
Step Two : Create a new project (here nacos-provider prior to use), pom.xml added nacos dependent distribution center.

<!--Nacos注册中心-->
<dependency>
    <groupId>com.alibaba.cloud</groupId>
    <artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
</dependency>

Here Insert Picture Description
Step Three : Match Center Address.

spring:
  application:
    name: nacos-provider
  cloud:
    nacos:
      discovery:
        server-addr: 192.168.0.127:8848 #注册中心地址
      config:
        server-addr: 192.168.0.127:8848 #注册中心地址

server:
  port: 17357

Step four : using the configuration parameters center

@SpringBootApplication
@EnableDiscoveryClient
public class NacosProvider {

    public static void main(String[] args) {
        SpringApplication.run(NacosProvider.class,args);
    }
    
    @RestController
    @RefreshScope
    class ConfigController {

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

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

    }

}

Here Insert Picture Description
Step Five : After using @RefreshScope notes to refresh parameter value Nacos distribution center to modify in real time.

Here Insert Picture Description

Notes :

Nacos distribution center configuration items will be covered by the same key configuration items in the project.

No public attention for more original Bowen

Alt