yahoo-eng-team team mailing list archive

[Lee Yarwood <lyarwood@xxxxxxxxxx>]

Public bug reported:

Description
===========
When using preallocated file based disks (preallocate_images = space) with the Libvirt virt driver the reported allocation for each disk appears doubled, leaving disk_available_least under reporting the amount of available resources on a compute node.

Originally reported and debugged by mschuppert and mdbooth:
https://bugzilla.redhat.com/show_bug.cgi?id=1554265

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

$ crudini --get /etc/nova/nova-cpu.conf DEFAULT preallocate_images
space

$ nova hypervisor-show eb515aa2-b79e-4f38-a6ea-d493a6e0657f
+---------------------------+------------------------------------------+
| Property                  | Value                                    |
+---------------------------+------------------------------------------+
[..]
| disk_available_least      | 43                                       |
| free_disk_gb              | 48                                       |
[..]
| local_gb                  | 48                                       |
| local_gb_used             | 0                                        |
[..]
+---------------------------+------------------------------------------+

$ nova flavor-show 2
+----------------------------+----------+
| Property                   | Value    |
+----------------------------+----------+
[..]
| disk                       | 20       |
[..]
+----------------------------+----------+

$ nova boot --image cirros-0.3.5-x86_64-disk --flavor 2 test
[..]
$ nova hypervisor-show eb515aa2-b79e-4f38-a6ea-d493a6e0657f
+---------------------------+------------------------------------------+
| Property                  | Value                                    |
+---------------------------+------------------------------------------+
[..]
| disk_available_least      | 3                                        |
| free_disk_gb              | 28                                       |
[..]
| local_gb                  | 48                                       |
| local_gb_used             | 20                                       |
[..]
+---------------------------+------------------------------------------+

Expected result
===============
The allocation for each preallocated disk is reported correctly and removed from disk_available_least.

Actual result
=============
The allocation for each preallocated disk appears doubled and removed from disk_available_least.

Environment
===========
1. Exact version of OpenStack you are running. See the following
  list for all releases: http://docs.openstack.org/releases/

   fb0b785169e5e422b06e82f2eb58e68f6d2008b3

2. Which hypervisor did you use?
   (For example: Libvirt + KVM, Libvirt + XEN, Hyper-V, PowerKVM, ...)
   What's the version of that?

   Libvirt + KVM

2. Which storage type did you use?
   (For example: Ceph, LVM, GPFS, ...)
   What's the version of that?

   file / qcow2

3. Which networking type did you use?
   (For example: nova-network, Neutron with OpenVSwitch, ...)

   N/A

Logs & Configs
==============
See above.

** Affects: nova
     Importance: Undecided
         Status: New


** Tags: libvirt

-- 
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Engineering Team, which is subscribed to OpenStack Compute (nova).
https://bugs.launchpad.net/bugs/1764489

Title:
  Preallocated disks are deducted twice from disk_available_least when
  using preallocated_images = space

Status in OpenStack Compute (nova):
  New

Bug description:
  Description
  ===========
  When using preallocated file based disks (preallocate_images = space) with the Libvirt virt driver the reported allocation for each disk appears doubled, leaving disk_available_least under reporting the amount of available resources on a compute node.

  Originally reported and debugged by mschuppert and mdbooth:
  https://bugzilla.redhat.com/show_bug.cgi?id=1554265

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

  $ crudini --get /etc/nova/nova-cpu.conf DEFAULT preallocate_images
  space

  $ nova hypervisor-show eb515aa2-b79e-4f38-a6ea-d493a6e0657f
  +---------------------------+------------------------------------------+
  | Property                  | Value                                    |
  +---------------------------+------------------------------------------+
  [..]
  | disk_available_least      | 43                                       |
  | free_disk_gb              | 48                                       |
  [..]
  | local_gb                  | 48                                       |
  | local_gb_used             | 0                                        |
  [..]
  +---------------------------+------------------------------------------+

  $ nova flavor-show 2
  +----------------------------+----------+
  | Property                   | Value    |
  +----------------------------+----------+
  [..]
  | disk                       | 20       |
  [..]
  +----------------------------+----------+

  $ nova boot --image cirros-0.3.5-x86_64-disk --flavor 2 test
  [..]
  $ nova hypervisor-show eb515aa2-b79e-4f38-a6ea-d493a6e0657f
  +---------------------------+------------------------------------------+
  | Property                  | Value                                    |
  +---------------------------+------------------------------------------+
  [..]
  | disk_available_least      | 3                                        |
  | free_disk_gb              | 28                                       |
  [..]
  | local_gb                  | 48                                       |
  | local_gb_used             | 20                                       |
  [..]
  +---------------------------+------------------------------------------+

  Expected result
  ===============
  The allocation for each preallocated disk is reported correctly and removed from disk_available_least.

  Actual result
  =============
  The allocation for each preallocated disk appears doubled and removed from disk_available_least.

  Environment
  ===========
  1. Exact version of OpenStack you are running. See the following
    list for all releases: http://docs.openstack.org/releases/

     fb0b785169e5e422b06e82f2eb58e68f6d2008b3

  2. Which hypervisor did you use?
     (For example: Libvirt + KVM, Libvirt + XEN, Hyper-V, PowerKVM, ...)
     What's the version of that?

     Libvirt + KVM

  2. Which storage type did you use?
     (For example: Ceph, LVM, GPFS, ...)
     What's the version of that?

     file / qcow2

  3. Which networking type did you use?
     (For example: nova-network, Neutron with OpenVSwitch, ...)

     N/A

  Logs & Configs
  ==============
  See above.

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