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[Alan Pevec <1243796@xxxxxxxxxxxxxxxxxx>]

** Changed in: horizon/havana
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1243796

Title:
  charting of meters for all resource types other than instance is
  broken when not grouped by project

Status in OpenStack Dashboard (Horizon):
  Fix Released
Status in OpenStack Dashboard (Horizon) havana series:
  Fix Released

Bug description:
  The 'Group by' dropdown on the Stats tab of the admin/Resource Usage
  panel allows the statistics to be grouped by either Project or '--'.

  From the code, it seems the intent of the '--' option is to group by
  resource ID, as opposed to project ID.

  This works as expected for the Compute (Nova) meters, but is broken
  for all the meters associated with any other resource type (glance
  images, swift objects, etc.)

  This is because the strategy used to query statistics by resource is
  to first find all the resources of the relevant type, then iterate
  over the resources separately querying for the statistics associated
  with the meter in question for each individual resource.

  The problem is that this initial query to discover the relevant
  resources is hard-coded in the group-by resource case to only ever
  identify instances:

  https://github.com/openstack/horizon/blob/master/openstack_dashboard/dashboards/admin/metering/views.py#L124

  As a result, the panel attempts to retrieve statistics for non-
  instance meters (e.g. 'image.download' or 'storage.objects')
  constrained to a resource ID associated with an instance. All of those
  queries are guaranteed never to yield any data.

  Instead, this iterative strategy should be replaced with a *single*
  statistics query with the 'groupby=resource_id' param set.

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