feature: Support rpm installation

[GabrielCFigueira]

Summary

I saw the message in

ansible-role-rke2/vars/main.yml

Lines 3 to 4 in cbe285b

	# RKE2 installation method (do not change this option)
	rke2_method: tar

but is there a reason for not using it? It would still use the supported install script by rke2.

I was able to install rke2 with the rpm method using this role with a minimal amount of changes:

• Masking the rke2 services only if they exist
• Fetching cis provided kernel params from /usr/share/rke2 instead of /usr/share/local/rke2 in case of the rpm install
• Passing the INSTALL_RKE2_TYPE="{{ rke2_method }}" variable to the install script

Beyond the benefits of using rpm, it would support enabling selinux in the rke2 parameters, something the tarball install does not support: rancher/rke2#3381

Issue Type

Feature Idea