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[OpenStack Infra <1821015@xxxxxxxxxxxxxxxxxx>]

Reviewed:  https://review.openstack.org/647519
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=44490142be5c20389703aeed54edca28f27c43c0
Submitter: Zuul
Branch:    master

commit 44490142be5c20389703aeed54edca28f27c43c0
Author: Sylvain Bauza <sbauza@xxxxxxxxxx>
Date:   Mon Mar 25 16:54:18 2019 +0100

    Add doc on VGPU allocs and inventories for nrp
    
    Now that we reshape inventories and allocations for VGPU resources in Stein,
    we think it's good for operators to know how to verify the resources using
    osc-placement.
    
    Change-Id: Ic58709aac2dd1f20f1b8440a3cea4f29eed9a965
    Closes-Bug: #1821015


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

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https://bugs.launchpad.net/bugs/1821015

Title:
  Attaching virtual GPU devices to guests in nova - libvirt reshaping

Status in OpenStack Compute (nova):
  Fix Released

Bug description:
  - [x] This is a doc addition request.

  This is coming up from discussion about what to document in the
  release notes for the libvirt VGPU reshaper work that happened in
  Stein:

  https://review.openstack.org/#/c/644412/4/releasenotes/notes/stein-
  prelude-b5fe92310e1e725e.yaml@57

  Specifically about the upgrade impact of VGPU inventory and
  allocations moving from the root compute node resource provider to a
  child resource provider.

  The release notes and docs for VGPUs are not very clear about this
  change (the docs don't actually mention anything about it). So this
  bug is for tracking that gap.

  I think it would be good to at the very least mention that starting in
  the Stein release, VGPU inventory and allocations are tracked on a
  child resource provider of the root compute node resource provider.
  And we could illustrate this using examples from openstack CLIs:

  https://docs.openstack.org/osc-placement/latest/index.html

  For example, list resource providers where there are two, one for the
  root compute node resource provider and one for a VGPU provider. Then
  list inventories on each and see there is VCPU/MEMORY_MB/DISK_GB on
  the compute node root provider and VGPU inventory on the child
  provider. Nothing fancy but something as a way to show, if you set
  this up correctly and things are working correctly, this is what you
  should expect to see.

  -----------------------------------
  Release: 18.1.0.dev1645 on 2019-02-27 13:28:37
  SHA: 592658aafcb5de8d31b19c8833a8d41ca86a5654
  Source: https://git.openstack.org/cgit/openstack/nova/tree/doc/source/admin/virtual-gpu.rst
  URL: https://docs.openstack.org/nova/latest/admin/virtual-gpu.html

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