How to update CentOS 7 to version 8 from an image without internet connection?

Question

linux

Need to upgrade CentOS 7 server to version 8, server in lAN without internet connection.
The CentOS 8 image is mounted, is it possible to update the system using this image without connecting to external repositories?
If anyone has come across such a problem, please provide a link.

Answer 1

You don't have a bare server. Dependencies will be updated accordingly. Deploy the local repository and update.

Answer 2

Bore mode ON - centos does not officially support updating between versions, what you will do is at your own peril and risk. The time spent on fixing possible problems can easily exceed the time spent on installing a clean centos 8 and transferring services, configs, data from the old centos 7.