Did you know there's a new major version in town for Puppet Core? You might have heard about it through the grapevine or in the Are You Ready for Puppet 9? webinar that @gpatton and I recently hosted. The wait is over and Puppet Core 9.0.0 is now available alongside Puppet Core 8.21.0.
Puppet Core 9 introduces significant runtime and platform changes, moving to Ruby 4.0, OpenSSL 3.5, and other changes, but the essential Puppet under the hood is largely unchanged from Puppet 8. The majority of upgrade effort will center on Ruby 4 compatibility and runtime dependency changes rather than Puppet language changes.
If you are staying on the Puppet Core 8.x release track, the latest Puppet Core 8.21 delivers the basic support fixes and security improvements you might need without the major dependency changes found in Puppet Core 9.
What matters most for the admins
Before upgrading to Puppet Core 9:
