On Aug 10, 2012, at 6:24 AM, Patrick Petit <patrick.michel.pe...@gmail.com> wrote:
> Hi, > So, if I paraphrase correctly what is meant out of the stacker jargon. > > min_count and max_count doc will go in the API doc as an extension item once > the DisableServerExtension cleanup is done. Right? Correct. > > However, the original question was about the num_instances property of the > RPC request spec. I do not see a direct relationship with min_count and > max_count. So, is num_instances another undocumented API extension parameter > or something else? The RPC code is internal and undocumented at the moment. The num_instances parameter is generated from min_count and max_count based on quota: 399 num_instances, quota_reservations = self._check_num_instances_quota( 400 context, instance_type, min_count, max_count) so if you have min_count = 3, max_count = 9: whith a quota of 10 you num_instances = 5 with a quota of 10, num_instances = 9 with a quota of 2, you will get a QuotaExceeded exception. I hope that clarifies things. > > I can see also that DisableServerExtensions proposal mentions a > reservation_id parameter... Can someone explain what it is ? Is it to support > server reservation like in AWS EC2? And so, would a user be able to create a > reservation (that is, not to actually create the reserve servers but to > reserve the) with say additional min_count max_count parameters in the > request. The reservation would fail if min_count cannot be honored by > OpenStack. If the reservation can be honored, would return a reservation_id > along with a value between min_count and max_count. Is this a correct > understanding of the behavior or complete speculation? return_reservation_id will tell the server create request to return reservation_ids instead of a single server instance, it will be part of the os-multiple-instances extension along with min_count and max_count: https://review.openstack.org/#/c/11090/ Vish
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