yahoo-eng-team team mailing list archive

[Claudiu Belu <cbelu@xxxxxxxxxxxxxxxxxxxxxx>]

Public bug reported:

Description
===========

PCI devices are requested through flavor extra_specs, and they can de
attached / detached by resizing to a flavor having more / fewer PCI
devices in the extra_specs.

But, if all the PCI devices have been claimed, they cannot be detached
anymore as cold resize will fail.


Steps to reproduce
==================

* Let's say we have 2 PCI devices whitelisted on a compute node.
* Create a flavor which requires both PCI devices.
* Create an instance with said flavor.
* Resize the instance to a flavor without any PCI devices.


Expected result
===============

The instance should be resized, and have no PCI devices attached.


Actual result
=============

The instance is in ERROR state, the cold resize failed.


Logs & Configs
==============

[1] resize attempt, n-api.log, n-sch.log: http://paste.openstack.org/show/598884/
[2] #openstack-nova discussion: http://eavesdrop.openstack.org/irclogs/%23openstack-nova/%23openstack-nova.2017-02-14.log.html#t2017-02-14T19:45:02

** Affects: nova
     Importance: Undecided
         Status: New


** Tags: pci resize scheduler

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https://bugs.launchpad.net/bugs/1666949

Title:
  PCI devices cannot be detached if all the PCI devices are claimed

Status in OpenStack Compute (nova):
  New

Bug description:
  Description
  ===========

  PCI devices are requested through flavor extra_specs, and they can de
  attached / detached by resizing to a flavor having more / fewer PCI
  devices in the extra_specs.

  But, if all the PCI devices have been claimed, they cannot be detached
  anymore as cold resize will fail.

  
  Steps to reproduce
  ==================

  * Let's say we have 2 PCI devices whitelisted on a compute node.
  * Create a flavor which requires both PCI devices.
  * Create an instance with said flavor.
  * Resize the instance to a flavor without any PCI devices.

  
  Expected result
  ===============

  The instance should be resized, and have no PCI devices attached.

  
  Actual result
  =============

  The instance is in ERROR state, the cold resize failed.

  
  Logs & Configs
  ==============

  [1] resize attempt, n-api.log, n-sch.log: http://paste.openstack.org/show/598884/
  [2] #openstack-nova discussion: http://eavesdrop.openstack.org/irclogs/%23openstack-nova/%23openstack-nova.2017-02-14.log.html#t2017-02-14T19:45:02

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