配置信息

bootstrap.yml配置：

spring:
  cloud:
    nacos:
      discovery:
        server-addr: 192.168.1.4:8848
        username: nacos
        password: nacos
        namespace: public
        ip: 192.168.8.36
      config:
        server-addr: 192.168.1.4:8848
        username: nacos
        password: nacos

application.yml配置：

spring:
  application:
      name: app-test
  profiles:
    active: dev6
  config:
    import:
      - nacos:${spring.application.name}.yml?refresh=true

遇到的问题

更新nacos上的配置文件后，并没有更新配置值Refresh keys changed: []，日志输出如下：

2024-09-23 19:54:40  [INFO ] [nacos.client.cachedata.internal.notifier] c.c.p.c.c.e.CommonEnvironmentPostProcessor - add MapPropertySource {spring.main.allow-bean-definition-overriding:true} 
2024-09-23 19:54:40  [WARN ] [nacos.client.cachedata.internal.notifier] c.a.c.n.c.NacosPropertySourceBuilder - Ignore the empty nacos configuration and get it based on dataId[null.properties] & group[DEFAULT_GROUP] 
2024-09-23 19:54:40  [WARN ] [nacos.client.cachedata.internal.notifier] c.a.c.n.c.NacosPropertySourceBuilder - Ignore the empty nacos configuration and get it based on dataId[null-dev6.properties] & group[DEFAULT_GROUP] 
2024-09-23 19:54:40  [INFO ] [nacos.client.cachedata.internal.notifier] o.s.c.b.c.PropertySourceBootstrapConfiguration - Located property source: [BootstrapPropertySource {name='bootstrapProperties-null-dev6.properties,DEFAULT_GROUP'}, BootstrapPropertySource {name='bootstrapProperties-null.properties,DEFAULT_GROUP'}] 
2024-09-23 19:54:40  [INFO ] [nacos.client.cachedata.internal.notifier] o.s.b.SpringApplication - The following 1 profile is active: "dev6" 
2024-09-23 19:54:40  [INFO ] [nacos.client.cachedata.internal.notifier] o.s.b.SpringApplication - Started application in 1.175 seconds (JVM running for 59.572) 
2024-09-23 19:54:40  [INFO ] [nacos.client.cachedata.internal.notifier] o.s.c.e.e.RefreshEventListener - Refresh keys changed: [] 

经过测试发现，将application.yml中的配置信息放到bootstrap.yml就能动态获取配置的变更 😦 日志如下：

2024-09-23 20:15:49  [INFO ] [nacos.client.cachedata.internal.notifier] c.c.p.c.c.e.CommonEnvironmentPostProcessor - add MapPropertySource {spring.main.allow-bean-definition-overriding:true} 
2024-09-23 20:15:49  [INFO ] [nacos.client.cachedata.internal.notifier] c.a.c.n.c.NacosConfigDataLoader - [Nacos Config] Load config[dataId=app-test.yml, group=DEFAULT_GROUP] success 
2024-09-23 20:15:49  [WARN ] [nacos.client.cachedata.internal.notifier] c.a.c.n.c.NacosPropertySourceBuilder - Ignore the empty nacos configuration and get it based on dataId[app-test] & group[DEFAULT_GROUP] 
2024-09-23 20:15:49  [WARN ] [nacos.client.cachedata.internal.notifier] c.a.c.n.c.NacosPropertySourceBuilder - Ignore the empty nacos configuration and get it based on dataId[app-test.properties] & group[DEFAULT_GROUP] 
2024-09-23 20:15:49  [WARN ] [nacos.client.cachedata.internal.notifier] c.a.c.n.c.NacosPropertySourceBuilder - Ignore the empty nacos configuration and get it based on dataId[app-test-dev6.properties] & group[DEFAULT_GROUP] 
2024-09-23 20:15:49  [INFO ] [nacos.client.cachedata.internal.notifier] o.s.c.b.c.PropertySourceBootstrapConfiguration - Located property source: [BootstrapPropertySource {name='bootstrapProperties-app-test-dev6.properties,DEFAULT_GROUP'}, BootstrapPropertySource {name='bootstrapProperties-app-test.properties,DEFAULT_GROUP'}, BootstrapPropertySource {name='bootstrapProperties-app-test,DEFAULT_GROUP'}] 
2024-09-23 20:15:49  [INFO ] [nacos.client.cachedata.internal.notifier] o.s.b.SpringApplication - The following 1 profile is active: "dev6" 
2024-09-23 20:15:49  [INFO ] [nacos.client.cachedata.internal.notifier] o.s.b.SpringApplication - Started application in 1.253 seconds (JVM running for 142.763) 
2024-09-23 20:15:49  [INFO ] [nacos.client.cachedata.internal.notifier] o.s.c.e.e.RefreshEventListener - Refresh keys changed: [sysId] 

两边日志比对，发现是第一次未生效的配置没有获取到spring.application.name即application.yml中配置的app-test。查阅资料发现：

bootstrap.yml 和 application.yml 都可以用来配置参数。
bootstrap.yml 用来程序引导时执行，应用于更加早期配置信息读取。可以理解成系统级别的一些参数配置，这些参数一般是不会变动的。一旦bootStrap.yml 被加载，则内容不会被覆盖。
application.yml 可以用来定义应用级别的， 应用程序特有配置信息，可以用来配置后续各个模块中需使用的公共参数等。

顺便记录下Spring Cloud Config的配置文件加载顺序：bootstrap.yml -> application.yml -> application-{profile}.yml -> 配置中心的配置。