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[Matt Riedemann <mriedem.os@xxxxxxxxx>]

The DiskFilter was deprecated in Stein
https://review.opendev.org/#/c/596502/ and this bug was reported before
the scheduler was using placement for disk filtering in Pike, so it may
not be valid anymore. If you think it is, please recreate on the latest
release of Stein 19.* and re-open with new details (or report a new
bug).

** Changed in: nova
       Status: In Progress => Invalid

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https://bugs.launchpad.net/bugs/1550098

Title:
  Disk resource consumption is inconsistent between scheduler and
  resource tracker

Status in OpenStack Compute (nova):
  Invalid

Bug description:
  The way scheduler consumes disk resources in host state is
  inconsistent with RT's way in compute service.

  The scheduler consumes "free_disk_mb" in its host state.
  https://github.com/openstack/nova/blob/master/nova/scheduler/host_manager.py#L266

  It comes from the min value of "free_disk_gb" and "disk_available_least" in ComputeNode object.
  https://github.com/openstack/nova/blob/master/nova/scheduler/host_manager.py#L189-L201

  But compute node changes "local_gb_used" instead in consuming
  resources from a request.
  https://github.com/openstack/nova/blob/master/nova/compute/resource_tracker.py#L709-L710


  There is a inconsistent gap(confirmed) of compute node state between
  scheduler and resource tracker, but somehow the compute node will be
  updated by virt driver to the consistent status after maybe 10
  seconds.

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