Document kubeadm for RHEL 8

[quindar83]

This is a Feature Request

What would you like to be added
The site 'Installing kubeadm' does not list RHEL 8 or CentOS 8 as a supported os. Only RHEL 7 / CentOS 7 is listed.
Both os versions released over a year ago and Google provides a lot of guides for how to install Kubernetes on CentOS 8.

Please
a) add RHEL 8 / CentOS 8 to the list of supported platforms
or
b) if there is a reason for this, explain it on the website.

Why is this needed
It is confusing when only an old os version ist supported without any further explanation.

Comments

[neolit123]

it's a matter of users testing and confirming these distros work fine.
if you have tested them feel free to send a pull request to update.

/sig cluster-lifecycle
/help

[k8s-ci-robot]

@neolit123:
This request has been marked as needing help from a contributor.

Please ensure the request meets the requirements listed here.

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In response to this:

it's a matter of users testing and confirming these distros work fine.
if you have tested them feel free to send a pull request to update.

/sig cluster-lifecycle
/help

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[neolit123]

/triage accepted

[sftim]

/kind feature
/retitle Document kubeadm for RHEL 8

[ydFu]

@quindar83
I had a look at it and sent in a pull request for this.
Add forward compatibility in RHEL / CentOS to the list of supported platforms.

[ydFu]

/assign
Fixes #26020