Upgrading from 0.25.1 to 3.7.4

[James Perry]

I have been tasked to upgrade puppet 0.25.1 to 3.7.4.  There has been a lot of past admins tweaking this puppet server and most of the existing modules are all ad-hoc creations. I want to ensure I do not miss any expected dependencies, but I also do not have months to manually traverse the entire Puppet site.pp file by hand.

Is there some tool, script or puppet command that will show me a quick digestion for each node as to what modules it includes and inherits? 

Thanks!

[Hunter Haugen]

Wow, that's a pretty big jump :).

It's not super terribly helpful, but each node should have a "classfile" that is often in the $vardir/classes.txt or $statedir/classes.txt that contains all the classes a node has applied to it in the last puppet run. I think `puppetd --configprint classfile` on a node will mention where it is.

-Hunter

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[Martin Alfke]

Hi James,

a horrible task (I am still busy at a customer upgrading the puppet DSL code from 2.7.23).

You want to get rid of:
- non-scoped variables (in manifests, modules and templates)
- import in class files

You might need to:
- clean up node classification
- rewrite classes to have parameters
- rewrite self developed facts, functions, types, providers

And you definitely want to have rspec tests in place.

Good luck.

Martin

P.S. I know of at least one installation where they did not upgrade, but a complete rewrite and a new puppet master.