为什么我需要部署一个“默认”应用程序才能在GAE中部署多个服务？ [英] Why do I need to deploy a "default" app before I can deploy multiple services in GAE?

问题描述

阅读

但这似乎并不是GAE微服务如何工作的准确描述？有没有像主控制器的默认服务，设置顶级配置或做某种路由？如果我只是运行一大堆非web应用程序（意味着可以在预定的流程数据上运行的应用程序）和用于接受Web请求的前端应用程序，那么为什么我仍然需要创建默认服务？

解决方案

原因是还有几个应用程序级配置，适用于所有服务/ modules：

• dispatch.yaml


• index.yaml


• queue.yaml


• cron.yaml

如果没有这些配置，有些配置可能会有问题在默认服务之后部署/一起部署。一些服务可能依赖于应用程序级别的配置。

首先部署 default 的要求只是简单的采取措施降低初始部署问题的风险。后续部署不再有此限制（因为已经部署了 default ）

是，默认服务是强制性的（有点像各种东西的厨房水槽，例如不符合任何调度规则的请求被发送到默认服务）。因此，只要将其中一个非web应用程序声明为默认的应用程序即可（默认的服务实际上并不重要）。

以某种方式相关（主要用于示例）： Google App Engine应用中的默认服务/模块可以是文件夹结构方面的非默认服务/模块吗？

Reading this doc it says "You must initially deploy a version of your app to the default service before you can create and deploy subsequent services."

I don't understand this because I thought the GAE microservices were separate things as in:

But it seems this is not an accurate depiction of how GAE microservices work? Is there like a master controller "default" service that sets top level config or does some kind of routing? If I'm just running a bunch of non web apps (meaning apps that wil run on a scheduled and process data) and a frontend "app" for accepting web requests isn't necessary than why do I still need to create the default service?

解决方案

The reason is that there are also several app-level configs, applicable to all services/modules:

• dispatch.yaml
• index.yaml
• queue.yaml
• cron.yaml

Some of these configs can have trouble if not deployed after/together with the default service. And some services may have dependencies on the app-level configs.

The requirement of deploying default first is simply a measure to reduce the risk of initial deployment problems. Subsequent deployments no longer have this restriction (since default is already deployed)

Yes, the default service is mandatory (sort of like a kitchen sink for all kinds of stuff, for example requests not matching any dispatch rule are sent to the default service). So just declare one of your non-web apps the default one (it doesn't matter what the default service actually does).

Somehow related (mostly for the examples): Can a default service/module in a Google App Engine app be a sibling of a non-default one in terms of folder structure?

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