Which Ruby’s version is supported by Puppet?

An MRI Ruby interpreter is needed by Puppet. There are some variants of Ruby which are never tested while some variants are tested with puppet very thoroughly and is done much more than other variants of Ruby. Run the variant of Ruby on your system for checking it. Since Puppet agent packages bundle their self environment of Ruby, therefore it does not depend upon the variant of Ruby of the OS.

The Puppet agent can be installed on the system with any of Ruby's variant or without installing Ruby. Similarly, The Puppet Enterprise also does not depend on the variant of Ruby of the OS since it bundles the self environment of Ruby. Puppet Enterprise can be installed on the system without installing Ruby or with any of the variant of Ruby.