We should attempt to clean up and standardize how to determine the OS distribution version to output in node.yml files during tests. At present CentOS node.yml files seem to be missing the minor version (e.g. for centos 8.2 we display centos 8)

For each distro below this is what looks to be the best source of info at present:

RHEL/CentOS

/etc/redhat-release and /etc/centos-release both include the full version whereas /etc/os-release (the current default) may or may not

SUSE

/etc/os-release includes this info, there's a note in /etc/SuSE-release that this file is deprecated (the current default)

Ubuntu

/etc/os-release includes this info, which is also the current default