The CentOS project heralded the end of a CentOS Linux as you knew it some time ago, ending an era of CentOS as an RHEL reconstruction. CentOS 8 will continue as a Stream version that you should update before the end of 2021.
If you want to migrate to another RHEL or CentOS Stream fork, here's how:
Migrate Centos 8 to CentOS Stream 8:
$ sudo dnf install centos-release-stream
Last metadata expiration check: 1:27:40 ago on Tue 08 Dec 2020 01:58:10 PM UTC.
Dependencies resolved.
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Package Arch Version Repository Size
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Installing:
centos-release-stream x86_64 8.1-1.1911.0.7.el8 extras 11 k
Transaction Summary
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Install 1 Package
Total download size: 11 k
Installed size: 6.6 k
Is this ok [y/N]:
Then run:
$ sudo dnf distro-sync
Migrate CentOS 6, 7, and 8 to Oracle ( Oracle Linux is a Red Hat Enterprise Linux rebuild, with some Oracle patches):
$ curl -O https://linux.oracle.com/switch/centos2ol.sh
$ sh centos2ol.sh
The following packages will be removed:
Depending on the version, new packages are installed: