Open Stack

This email is directed at anyone who maintains a 3rd-party Template 
plugin for Heat. (Do such people exist?)

Good news: you know how it's never been clear what parts of the Stack 
and Resource interfaces you could rely on to be stable? I'm proposing to 
fix that in Pike.

Bad news: you know how it's never been clear what parts of the Stack and 
Resource interfaces you could rely on to be stable? If you relied on 
stuff that wasn't used by the built-in HOT or Cfn plugins then you 
probably guessed wrong and your plugin will break.


Details here:

https://review.openstack.org/#/c/424359/3/specs/pike/stack-definition.rst

Please comment on that review if there's anything additional you'd like 
to see in the stable API. I'm happy to try to accommodate where that's 
possible (and not crazy-inefficient).

cheers,
Zane.