[chef] Re: Chef 10 -> 12 upgrade (cookbook scorched earth)

[Lamont Granquist < >]

On 07/14/2015 07:50 AM, Erik Ogan wrote:
>   * What are the perils of serving a Chef 12 client data from a Chef 
> 10 server?

So you probably want to do this the other way around.  Hosted Chef still 
serves Chef 10 clients from a Chef-12 codebase fine so that is currently 
in production use and will work.

There are going to be gotchas in upgrading from old private chef through 
EC10/EC11, and you will not be able to do that in one upgrade, but I'm 
not an expert on which versions you should target. You should reach out 
to Chef support for help with that one, they can dig up the right 
resources to directly help you with that.

Once your server is on 12, then the process will become a somewhat more 
straightforwards process of fixing your cookbooks and upgrading clients.