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[Elod Illes <1893284@xxxxxxxxxxxxxxxxxx>]

** Changed in: nova/ussuri
       Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/1893284

Title:
  Per-user quotas not scoped correctly when creating a server

Status in OpenStack Compute (nova):
  Fix Released
Status in OpenStack Compute (nova) pike series:
  New
Status in OpenStack Compute (nova) queens series:
  New
Status in OpenStack Compute (nova) rocky series:
  New
Status in OpenStack Compute (nova) stein series:
  New
Status in OpenStack Compute (nova) train series:
  New
Status in OpenStack Compute (nova) ussuri series:
  Fix Released

Bug description:
  While looking into an issue reported on the ML [1] around per-user
  quotas not working properly, I found a bug where quota checking is not
  scoped correctly when creating a server.

  This causes per-user quota limits not to be honored during these API
  requests.

  The problem is in a utility function we use for checking quota when
  creating servers:

  https://github.com/openstack/nova/blob/f521f4dbace0e35bedd089369da6f6969da5ca32/nova/compute/utils.py#L1104-L1120

  The Quotas.check_deltas method needs a user_id keyword arg in order to
  scope a quota check to a particular user. However, when we call
  check_num_instances_quota we don't pass a project_id or user_id
  because at the time of the quota check, we have not yet created an
  instance record and thus will not use that to determine the
  appropriate project and user. Instead, we should rely on the
  RequestContext.project_id and RequestContext.user_id as defaults in
  this case, but check_num_instances_quota only defaults project_id and
  not user_id.

  check_num_instances_quota should also default user_id to the
  RequestContext.user_id when user_id is not explicitly passed.

  [1] http://lists.openstack.org/pipermail/openstack-
  discuss/2020-August/016861.html

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