nacos 配置中心加载配置启动 dubbo 报 error

[xd-luqiang]

加载配置的代码

        rootConfig := dubbo_config.NewRootConfigBuilder().
		SetConfigCenter(dubbo_config.NewConfigCenterConfigBuilder().
			SetProtocol("nacos").
			SetAddress(ip).    // 根据配置结构，设置配置中心
			SetDataID(DataID). // 设置配置ID
			SetGroup(Group).
			Build()).
		SetLogger(LoggerConfig).
		Build()

	if err := rootConfig.Init(); err != nil { // 框架启动
		panic(err)
	}

配置内容

dubbo:
  registries:
    my_nacos:
      protocol: nacos
      address: mse-31a78442-nacos-ans.mse.aliyuncs.com:8848
      group: myGroup
      params:
        nacos.logDir: ./log
        nacos.logLevel: error
  metrics:
    enable: true # default is true
    path: /metrics
    port: 9090 # default is 9090
    namespace: public # default is dubbo 作为数据上报 metrics 的前缀
  protocols:
    triple:
      name: tri
      port: 20000
  provider:
    services:
      Provider:
        interface: dubbo.model # must be compatible with grpc or dubbo-java
  shutdown:
    internal-signal: true

报错信息

2022-12-08T17:26:32.867+0800    ERROR   nacos_server/nacos_server.go:194        api</v1/cs/configs>,method:<GET>, params:<{"dataId":"dubbo.io.configurators","group":"dubbo"}>, call domain error:<[404] config data not exist
> , result:<config data not exist
>
2022-12-08T17:26:32.869+0800    ERROR   nacos_server/nacos_server.go:194        api</v1/cs/configs>,method:<GET>, params:<{"dataId":"dubbo.io.configurators","group":"dubbo"}>, call domain error:<[404] config data not exist
> , result:<config data not exist
>
2022-12-08T17:26:32.870+0800    INFO    config_client/config_proxy.go:180       [client.ListenConfig] request params:map[Listening-Configs:featuresdubbo9a050876b1eb3e07efaa73fd473e6885publictablesdubbo1604b55f395046d91e3ad6c9bcf833c8publicmodelsdubboe63c4f961630fabb73c6e22d61b9599fpublicrootdubbo5a7a2382126da03de55b3c9c32f0ef06public tenant:public] header:map[Content-Type:application/x-www-form-urlencoded;charset=utf-8 Long-Pulling-Timeout:30000 Long-Pulling-Timeout-No-Hangup:true accessKey: secretKey:] 

2022-12-08T17:26:32.871+0800    ERROR   nacos_server/nacos_server.go:194        api</v1/cs/configs>,method:<GET>, params:<{"dataId":"dubbo.io.configurators","group":"dubbo"}>, call domain error:<[404] config data not exist
> , result:<config data not exist
>
2022-12-08T17:26:32.871+0800    ERROR   config_client/config_client.go:191      get config from server error:[404] config data not exist
 
2022-12-08T17:26:32.871+0800    WARN    config_client/config_client.go:196      [client.GetConfig] config not found, dataId: dubbo.io.configurators, group: dubbo, namespaceId: .
2022-12-08T17:26:32.873+0800    INFO    config_client/config_client.go:423      [client.ListenConfig] config changed:models%02dubbo%02public%01root%02dubbo%02public%01features%02dubbo%02public%01tables%02dubbo%02public%01

2022-12-08T17:26:32.874+0800    ERROR   nacos_server/nacos_server.go:194        api</v1/cs/configs>,method:<GET>, params:<{"dataId":"dubbo.model.configurators","group":"dubbo"}>, call domain error:<[404] config data not exist
> , result:<config data not exist
>
2022-12-08T17:26:32.876+0800    ERROR   nacos_server/nacos_server.go:194        api</v1/cs/configs>,method:<GET>, params:<{"dataId":"dubbo.model.configurators","group":"dubbo"}>, call domain error:<[404] config data not exist
> , result:<config data not exist
>
2022-12-08T17:26:32.878+0800    ERROR   nacos_server/nacos_server.go:194        api</v1/cs/configs>,method:<GET>, params:<{"dataId":"dubbo.model.configurators","group":"dubbo"}>, call domain error:<[404] config data not exist
> , result:<config data not exist
>
2022-12-08T17:26:32.878+0800    ERROR   config_client/config_client.go:191      get config from server error:[404] config data not exist
 
2022-12-08T17:26:32.878+0800    WARN    config_client/config_client.go:196      [client.GetConfig] config not found, dataId: dubbo.model.configurators, group: dubbo, namespaceId: .

服务并不需要这两个配置，为什么要去加载它们？

自查定位到这行：

dubbo-go/registry/directory/directory.go

Line 485 in 7bba076

url.EncodedServiceKey()+constant.ConfiguratorSuffix,

dubbo-go/registry/directory/directory.go

Line 509 in 7bba076

application.Name+constant.ConfiguratorSuffix,

dubbo-go/registry/base_configuration_listener.go

Line 59 in 7bba076

config_center.WithGroup(constant.Dubbo)); err != nil {

为什么这里设置监听用的 key 是 url.EncodedServiceKey()+constant.ConfiguratorSuffix ？不能在配置里设置吗？我没建立叫这个名的配置。
为什么 listener.InitWith里默认用constant.Dubbo ? 不能在配置里设置吗？ 我没这个group。
为什么这里一定要设置listener？我配置不会变动，不需要监听。

如果是我这样使用不对，请问建议的使用方式是怎样的？

[AlexStocks]

@binbin0325

[binbin0325]

当使用了动态配置中心后，会在程序启动时从配置中心读取配置文件。 你代码里的SetConfigCenter就是开启了配置中心

dubbo.io.configurators 是默认的Application name+固定的后缀configurators, 可以按照如下方式修改

dubbo:
  application:
    name: myApp 

关于配置中心相关内容的参考链接：https://cn.dubbo.apache.org/zh/docs3-v2/golang-sdk/samples/config-center-dynamic/

如果你不需要配置中心,那么参考samples中的helloworld 启动方式就足够了：https://github.com/apache/dubbo-go-samples/tree/master/helloworld

[xd-luqiang]

意思是我的配置文件名要改成 myApp.configurators 吗？那读这个默认配置 dubbo.model.configurators ，怎么避免？

[binbin0325]

意思是我的配置文件名要改成 myApp.configurators 吗？那读这个默认配置 dubbo.model.configurators ，怎么避免？

是的，dubbo.model是你的配置文件中设置的。主要是当provider的参数发生变化时consumer可以感知,暂时可以忽略。

rovider:
    services:
      Provider:
        interface: dubbo.model # must be compatible with grpc or dubbo-java

[xd-luqiang]

我的配置文件名改成 myApp.configurators 加了application 仍然会报这两个error！为什么要去读这两个默认配置，group 还固定为dubbo？可不同应用的 group 不可能都是 dubbo 吧

[binbin0325]

上面解释过了，读这两个默认配置的原因，group 也是可以配置的，你仔细看下上面说的配置中心文档：https://github.com/apache/dubbo-go-samples/tree/master/helloworld。

[binbin0325]

这段代码逻辑目前看没有用，后续将考虑删掉

[AlexStocks]

志信：监听了配置文件，但是没有后续处理。目前删掉相关逻辑代码。

[chickenlj]

我的配置文件名改成 myApp.configurators 加了application 仍然会报这两个error！为什么要去读这两个默认配置，group 还固定为dubbo？可不同应用的 group 不可能都是 dubbo 吧

这部分是 Dubbo 内置的服务治理流程。

2022-12-08T17:26:32.867+0800    ERROR   nacos_server/nacos_server.go:194        api</v1/cs/configs>,method:<GET>, params:<{"dataId":"dubbo.io.configurators","group":"dubbo"}>, call domain error:<[404] config data not exist
> , result:<config data not exist
>
2022-12-08T17:26:32.869+0800    ERROR   nacos_server/nacos_server.go:194        api</v1/cs/configs>,method:<GET>, params:<{"dataId":"dubbo.io.configurators","group":"dubbo"}>, call domain error:<[404] config data not exist
> , result:<config data not exist
>
2022-12-08T17:26:32.870+0800    INFO    config_client/config_proxy.go:180       [client.ListenConfig] request params:map[Listening-Configs:featuresdubbo9a050876b1eb3e07efaa73fd473e6885publictablesdubbo1604b55f395046d91e3ad6c9bcf833c8publicmodelsdubboe63c4f961630fabb73c6e22d61b9599fpublicrootdubbo5a7a2382126da03de55b3c9c32f0ef06public tenant:public] header:map[Content-Type:application/x-www-form-urlencoded;charset=utf-8 Long-Pulling-Timeout:30000 Long-Pulling-Timeout-No-Hangup:true accessKey: secretKey:] 

2022-12-08T17:26:32.871+0800    ERROR   nacos_server/nacos_server.go:194        api</v1/cs/configs>,method:<GET>, params:<{"dataId":"dubbo.io.configurators","group":"dubbo"}>, call domain error:<[404] config data not exist
> , result:<config data not exist
>
2022-12-08T17:26:32.871+0800    ERROR   config_client/config_client.go:191      get config from server error:[404] config data not exist
 
2022-12-08T17:26:32.871+0800    WARN    config_client/config_client.go:196      [client.GetConfig] config not found, dataId: dubbo.io.configurators, group: dubbo, namespaceId: .
2022-12-08T17:26:32.873+0800    INFO    config_client/config_client.go:423      [client.ListenConfig] config changed:models%02dubbo%02public%01root%02dubbo%02public%01features%02dubbo%02public%01tables%02dubbo%02public%01

2022-12-08T17:26:32.874+0800    ERROR   nacos_server/nacos_server.go:194        api</v1/cs/configs>,method:<GET>, params:<{"dataId":"dubbo.model.configurators","group":"dubbo"}>, call domain error:<[404] config data not exist
> , result:<config data not exist
>
2022-12-08T17:26:32.876+0800    ERROR   nacos_server/nacos_server.go:194        api</v1/cs/configs>,method:<GET>, params:<{"dataId":"dubbo.model.configurators","group":"dubbo"}>, call domain error:<[404] config data not exist
> , result:<config data not exist
>
2022-12-08T17:26:32.878+0800    ERROR   nacos_server/nacos_server.go:194        api</v1/cs/configs>,method:<GET>, params:<{"dataId":"dubbo.model.configurators","group":"dubbo"}>, call domain error:<[404] config data not exist
> , result:<config data not exist
>
2022-12-08T17:26:32.878+0800    ERROR   config_client/config_client.go:191      get config from server error:[404] config data not exist
 
2022-12-08T17:26:32.878+0800    WARN    config_client/config_client.go:196      [client.GetConfig] config not found, dataId: dubbo.model.configurators, group: dubbo, namespaceId: .

这个是哪里的报错？理论上 Dubbo 框架应该能屏蔽这个读取报错，不影响正常的启动过程，甚至不应该打印 Error 级别日志。