Is the V3 api going to be a task API like nova desires (someday it will
happen in nova to)?
If so then it seems like a natural fit for this (aka submit a request,
get back a task json object that can be polled on, one of those polling
states it reports back is 'WAITING' or 'BLOCKED' or ...)
Dulko, Michal wrote:
That’s right, it might be painful. V3 API implememtation would be also a
hard, because then we would need different manager behavior for requests
from V2 and V3… So maybe we need some config flag with deprecation
procedure scheduled?
*From:*Duncan Thomas [mailto:[email protected]]
*Sent:* Monday, June 29, 2015 2:46 PM
*To:* OpenStack Development Mailing List (not for usage questions)
*Subject:* Re: [openstack-dev] [cinder][oslo] Locks for create from
volume/snapshot
On 29 June 2015 at 15:23, Dulko, Michal <[email protected]
<mailto:[email protected]>> wrote:
There’s also some similar situations when we actually don’t lock on
resources. For example – a cgsnapshot may get deleted while creating
a consistencygroup from it.
From my perspective it seems best to have atomic state changes and
state-based exclusion in API. We would need some kind of
currently_used_to_create_snapshot/volums/consistencygroups states to
achieve that. Then we would be also able to return VolumeIsBusy
exceptions so retrying a request would be on the user side.
I'd agree, except that gives quite a big behaviour change in the
tenant-facing API, which will break clients and scripts. Not sure how to
square that circle... I'd say V3 API except Mike might kill me...
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