Knife ec2 instance create --user-data (HELP!)

Hi all

I asked on IRC but there seems to be a flood of chat about the new version
of chef ATM.

I’m trying to follow the datastax launch guide:

This guide follows along using the actual ec2 console, not chef. I’m
trying to replicate this where they specify “user data” is “raw text” - is
there a way to do this same thing with the --user-data option to the
ec2 plugin?

Any examples?