Can virtual hosting serve as a CDN node?

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Please note that the premise is crucial, just discussing, please do not come in blindly for your own reason, thank you all." "As stated, how to achieve it, just upload a program on virtual space can control substation (virtual host) and store files or even reverse proxy mirrors directly." "Nodes stations directly php programs mirror or reverse proxy, this kind of thing isn't really feasible because I want the main station whatever domain name or ip address can use key or other way to connect to the substation." "If using reverse proxy or mirror later also need to return to modify the substation, too troublesome." "I hope only deploy once, after the main station can realize direct control of the substation.