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Posted to notifications@dubbo.apache.org by GitBox <gi...@apache.org> on 2022/07/27 07:43:18 UTC
[GitHub] [dubbo] zhaoqf-cq opened a new issue, #10374: dubbo 使用 k8s 为注册中心， 消费者@DubboReference providedby 不配置 提示没有服务提供者
zhaoqf-cq opened a new issue, #10374:
URL: https://github.com/apache/dubbo/issues/10374
我用的 dubbo3.0.7，参考 https://github.com/apache/dubbo-samples/tree/master/dubbo-samples-kubernetes 这个 demo 创建的spring boot 应用，运行一切正常
由于服务可能比较多， 我不太想 像 demo 里面一个个订阅服务 subscribed-services=dubbo-samples-apiserver-provider， 所以我取消了这个配置， 项目依旧可以运行， 但是我不太明白这个地址的配置能有那些， 取消了这个订阅有什么影响？
dubbo.registry.address=kubernetes://DEFAULT_MASTER_HOST?registry-type=service&duplicate=false&namespace=dubbo-demo&trustCerts=true&subscribed-services=dubbo-samples-apiserver-provider
然后在消费接口这里使用的是 @DubboReference(version = "1.0.0", providedBy = "dubbo-samples-apiserver-provider") 这样来引用接口，这里为什么需要声明应用呢？ 而且我尝试过不声明应用启动就会提示 没有服务提供者 导致启动失败，如果一个个加providedby， 就显得有点傻
求大佬解惑！！！
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[GitHub] [dubbo] zhaoqf-cq closed issue #10374: dubbo 使用 k8s 为注册中心， 消费者@DubboReference providedby 不配置 提示没有服务提供者
Posted by "zhaoqf-cq (via GitHub)" <gi...@apache.org>.
zhaoqf-cq closed issue #10374: dubbo 使用 k8s 为注册中心， 消费者@DubboReference providedby 不配置 提示没有服务提供者
URL: https://github.com/apache/dubbo/issues/10374
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[GitHub] [dubbo] zhaoqf-cq closed issue #10374: dubbo 使用 k8s 为注册中心， 消费者@DubboReference providedby 不配置 提示没有服务提供者
Posted by GitBox <gi...@apache.org>.
zhaoqf-cq closed issue #10374: dubbo 使用 k8s 为注册中心， 消费者@DubboReference providedby 不配置 提示没有服务提供者
URL: https://github.com/apache/dubbo/issues/10374
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[GitHub] [dubbo] AlbumenJ commented on issue #10374: dubbo 使用 k8s 为注册中心， 消费者@DubboReference providedby 不配置 提示没有服务提供者
Posted by GitBox <gi...@apache.org>.
AlbumenJ commented on issue #10374:
URL: https://github.com/apache/dubbo/issues/10374#issuecomment-1316573166
> 作为一个使用思维感觉上提个自己的建议，在消费者端指定providedBy没有在服务提供者端指定好，毕竟服务提供者是最知道自己的应用名的，所以可以在暴露出来的interface上带上这个应用名信息，小建议
一个不错的提议，或许我们可以调研下怎么支持
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[GitHub] [dubbo] zhaoqf-cq commented on issue #10374: dubbo 使用 k8s 为注册中心， 消费者@DubboReference providedby 不配置 提示没有服务提供者
Posted by GitBox <gi...@apache.org>.
zhaoqf-cq commented on issue #10374:
URL: https://github.com/apache/dubbo/issues/10374#issuecomment-1196801258
> 这里需要一个服务映射的功能。 因为dubbo本身是没法在消费端侧知道interface对应的appName是什么，在 Kubernetes 体系下，Service 对应的是 appName，没有 appName 就没法做订阅，所以才有了 providedBy 这个参数。 对于一些其他注册中心下的，比如 nacos 默认会开启元数据中心，元数据中心中会存有一份 interface to appName 的映射，所以不需要配 providedBy 参数。但是 Kubernetes 原生体系下没有这个元数据中心。
感谢大佬解惑，看到回复还第一时间试过 单独配置一个 元数据中心，居然真的可以... 惊喜， 非常感激
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[GitHub] [dubbo] zhaoqf-cq closed issue #10374: dubbo 使用 k8s 为注册中心， 消费者@DubboReference providedby 不配置 提示没有服务提供者
Posted by GitBox <gi...@apache.org>.
zhaoqf-cq closed issue #10374: dubbo 使用 k8s 为注册中心， 消费者@DubboReference providedby 不配置 提示没有服务提供者
URL: https://github.com/apache/dubbo/issues/10374
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[GitHub] [dubbo] zhaoqf-cq closed issue #10374: dubbo 使用 k8s 为注册中心， 消费者@DubboReference providedby 不配置 提示没有服务提供者
Posted by GitBox <gi...@apache.org>.
zhaoqf-cq closed issue #10374: dubbo 使用 k8s 为注册中心， 消费者@DubboReference providedby 不配置 提示没有服务提供者
URL: https://github.com/apache/dubbo/issues/10374
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[GitHub] [dubbo] AlbumenJ commented on issue #10374: dubbo 使用 k8s 为注册中心， 消费者@DubboReference providedby 不配置 提示没有服务提供者
Posted by GitBox <gi...@apache.org>.
AlbumenJ commented on issue #10374:
URL: https://github.com/apache/dubbo/issues/10374#issuecomment-1196494424
这里需要一个服务映射的功能。
因为dubbo本身是没法在消费端侧知道interface对应的appName是什么，在 Kubernetes 体系下，Service 对应的是 appName，没有 appName 就没法做订阅，所以才有了 providedBy 这个参数。
对于一些其他注册中心下的，比如 nacos 默认会开启元数据中心，元数据中心中会存有一份 interface to appName 的映射，所以不需要配 providedBy 参数。但是 Kubernetes 原生体系下没有这个元数据中心。
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[GitHub] [dubbo] zzps commented on issue #10374: dubbo 使用 k8s 为注册中心， 消费者@DubboReference providedby 不配置 提示没有服务提供者
Posted by GitBox <gi...@apache.org>.
zzps commented on issue #10374:
URL: https://github.com/apache/dubbo/issues/10374#issuecomment-1314719411
> 这里需要一个服务映射的功能。 因为dubbo本身是没法在消费端侧知道interface对应的appName是什么，在 Kubernetes 体系下，Service 对应的是 appName，没有 appName 就没法做订阅，所以才有了 providedBy 这个参数。 对于一些其他注册中心下的，比如 nacos 默认会开启元数据中心，元数据中心中会存有一份 interface to appName 的映射，所以不需要配 providedBy 参数。但是 Kubernetes 原生体系下没有这个元数据中心。
作为一个使用思维感觉上提个自己的建议，在消费者端指定providedBy没有在服务提供者端指定好，毕竟服务提供者是最知道自己的应用名的，所以可以在暴露出来的interface上带上这个应用名信息，小建议
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[GitHub] [dubbo] aamingaa commented on issue #10374: dubbo 使用 k8s 为注册中心， 消费者@DubboReference providedby 不配置 提示没有服务提供者
Posted by "aamingaa (via GitHub)" <gi...@apache.org>.
aamingaa commented on issue #10374:
URL: https://github.com/apache/dubbo/issues/10374#issuecomment-1407638355
look at this https://github.com/apache/dubbo/pull/11390
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[GitHub] [dubbo] zhaoqf-cq commented on issue #10374: dubbo 使用 k8s 为注册中心， 消费者@DubboReference providedby 不配置 提示没有服务提供者
Posted by GitBox <gi...@apache.org>.
zhaoqf-cq commented on issue #10374:
URL: https://github.com/apache/dubbo/issues/10374#issuecomment-1197576728
@AlbumenJ 大佬， 我昨天添加了 zk 作为 dubbo 元数据中心的依赖，使用也正常...
`
dubbo.metadata-report.address=zookeeper://ip:port
<dependency>
<groupId>org.apache.dubbo</groupId>
<artifactId>dubbo-metadata-report-zookeeper</artifactId>
</dependency>`
但是我刚刚尝试将元数据中心换成 redis，consumer 启动的时候就提示 no provider... 请问这是为什么呢？
`dubbo.metadata-report.address=redis://ip:port
<dependency>
<groupId>org.apache.dubbo</groupId>
<artifactId>dubbo-metadata-report-redis</artifactId>
</dependency>`
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[GitHub] [dubbo] robberphex commented on issue #10374: dubbo 使用 k8s 为注册中心， 消费者@DubboReference providedby 不配置 提示没有服务提供者
Posted by GitBox <gi...@apache.org>.
robberphex commented on issue #10374:
URL: https://github.com/apache/dubbo/issues/10374#issuecomment-1350825641
现在的搞法是：
```java
public interface GreetingService {
String sayHello(String name);
}
@Component("annotatedConsumer")
public class GreetingServiceConsumer {
@DubboReference(version = "1.0.0", providedBy = "dubbo-samples-xds-provider")
private GreetingService greetingService;
}
```
"在消费者端指定providedBy没有在服务提供者端指定好，毕竟服务提供者是最知道自己的应用名的，所以可以在暴露出来的interface上带上这个应用名信息"，我觉得这样是比较ok的。
代码上可以改成这样：
```java
@DubboProvidedbBy("dubbo-samples-xds-provider")
public interface GreetingService {
String sayHello(String name);
}
@Component("annotatedConsumer")
public class GreetingServiceConsumer {
@DubboReference(version = "1.0.0")
private GreetingService greetingService;
}
```
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