为什么我需要部署一个“默认"?应用程序之前我可以在 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

但这似乎不是对 GAE 微服务如何工作的准确描述?是否有像主控制器默认"服务那样设置顶级配置或进行某种路由?如果我只是运行一堆非网络应用程序(意味着将在预定和处理数据上运行的应用程序)并且不需要用于接受网络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级配置，适用于所有服务/模块:

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

如果没有在 default 服务之后/一起部署，其中一些配置可能会出现问题.并且某些服务可能依赖于应用级别的配置.

首先部署default 的要求只是一种降低初始部署问题风险的措施.后续部署不再有此限制(因为 default 已部署)

是的，default 服务是强制性的(有点像厨房水槽，可以处理各种东西，例如与任何调度规则不匹配的请求被发送到 default服务).因此，只需将您的一个非网络应用程序声明为默认应用程序(default 服务实际执行的操作无关紧要).

以某种方式相关(主要用于示例):Google App Engine 应用中的默认服务/模块在文件夹结构方面可以是非默认服务/模块的同级吗?

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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