[openstack-dev] [Heat] Precursor to Phase 1 Convergence

Zane Bitter zbitter at redhat.com
Fri Jan 9 13:49:07 UTC 2015

On 09/01/15 01:07, Angus Salkeld wrote:
> I am not in favor of the --continue as an API. I'd suggest responding to
> resource timeouts and if there is no response from the task, then
> re-start (continue)
> the task.

Yeah, I am not in favour of a new API either. In fact, I believe we 
already have this functionality: if you do another update with the same 
template and parameters then it will break the lock and continue the 
update if the engine running the previous update has failed. And when we 
switch over to convergence it will still do the Right Thing without any 
extra implementation effort.

There is one improvement we can make to the API though: in Juno, Ton 
added a PATCH method to stack update such that you can reuse the 
existing parameters without specifying them again. We should extend this 
to the template also, so you wouldn't have to supply any data to get 
Heat to start another update with the same template and parameters.

I'm not sure if there is a blueprint for this already; co-ordinate with 
Ton if you are planning to work on it.


More information about the OpenStack-dev mailing list