rayzhou2017

please sign off your pr by using `-s` like ``` git commit -a -s ```

I will write a blog regarding the architecture of 4.0 after 3.0 released.

It seems the app not well developed. 

/cc @min-zh

Glad to hear that. We are busy on the new version release. @leoendless will get back to you soon.

Should we remove it? @faweizhao26

@Patrick-LuoYu @harrisonliu5 Please help review this PR.

check https://kubesphere.cloud/self-service/disaster-recovery/

@panzhaohui 有分类（category）功能，但没有标签（tag）功能，管理员可以定义类别，标签功能可以后续考虑一下。

This one belongs to [#125](https://github.com/openpitrix/openpitrix/issues/125)