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[Rodolfo Alonso <1936408@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

Neutron quota change should check available existing resources. This is
done, for example, in Nova. When a quota resource limit is changed, the
available resource count is checked first. If the new quota upper limit
(lower than the previous one) is lower than the amount of resources in
use, the quota driver should raise an exception.

This RFE implies a change in the Neutron quota current behaviour. Some
users are expecting the new quota limit to be applied, regardless of
being lower than the current resource usage.

However, other users (Octavia) expect the quota driver to fail when
lowering the quota limit under the existing resource usage. My
recommendation is to use a config knob to decide the behaviour of the
quota driver; by default, the current behaviour will prevail.

Bugzilla reference: https://bugzilla.redhat.com/show_bug.cgi?id=1980728

** Affects: neutron
     Importance: Wishlist
     Assignee: Rodolfo Alonso (rodolfo-alonso-hernandez)
         Status: New

** Changed in: neutron
     Assignee: (unassigned) => Rodolfo Alonso (rodolfo-alonso-hernandez)

** Changed in: neutron
   Importance: Undecided => Critical

** Changed in: neutron
   Importance: Critical => Wishlist

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https://bugs.launchpad.net/bugs/1936408

Title:
  [RFE] Neutron quota change should check available existing resources

Status in neutron:
  New

Bug description:
  Neutron quota change should check available existing resources. This
  is done, for example, in Nova. When a quota resource limit is changed,
  the available resource count is checked first. If the new quota upper
  limit (lower than the previous one) is lower than the amount of
  resources in use, the quota driver should raise an exception.

  This RFE implies a change in the Neutron quota current behaviour. Some
  users are expecting the new quota limit to be applied, regardless of
  being lower than the current resource usage.

  However, other users (Octavia) expect the quota driver to fail when
  lowering the quota limit under the existing resource usage. My
  recommendation is to use a config knob to decide the behaviour of the
  quota driver; by default, the current behaviour will prevail.

  Bugzilla reference:
  https://bugzilla.redhat.com/show_bug.cgi?id=1980728

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