Open Stack

If you are deploying on CentOS (with RDO?), you can enable the CentOS
Virtualization special interest group [1] repository.

The repository contains qemu-kvm-ev >= 2.3 backported from RHEV.
It is recommended as the qemu-kvm version from base CentOS
repositories is not high enough and lacks some features (things like
snapshots, iirc).

qemu-kvm >= 2.3 is actually a requirement in RDO >= Newton and we'll
bundle the CentOS virtualization SIG repository in our release
packages.

[1]: https://wiki.centos.org/SpecialInterestGroup/Virtualization

David Moreau Simard
Senior Software Engineer | Openstack RDO

dmsimard = [irc, github, twitter]


On Thu, Sep 29, 2016 at 5:00 AM, William Josefsson
<william.josefson at gmail.com> wrote:
> thanks everyone, I verified setting mem_stats_period_seconds = 0 as
> suggested by Corbin in nova.conf libvirt section, and then restarting
> openstack-nova-compute service and it works!
>
> While this seems to be a workable workaround I'm not sure what's the plans
> to permanently fix this in CentOS7.2? thx will
>
>
>
> On Wed, Sep 28, 2016 at 11:37 PM, Corbin Hendrickson
> <corbin.hendrickson at endurance.com> wrote:
>>
>> Oh you can read it in the bug thread, but I forgot to mention, if you put
>> in your nova.conf under the libvirt section mem_stats_period_seconds = 0,
>> and restart nova on the destination (although i'd say just do it on both) it
>> will no longer hit the bug. I tested this a couple weeks back with success.
>>
>> Corbin Hendrickson
>> Endurance Cloud Development Lead - Manager
>> Cell: 801-400-0464
>>
>> On Wed, Sep 28, 2016 at 9:34 AM, Corbin Hendrickson
>> <corbin.hendrickson at endurance.com> wrote:
>>>
>>> It unfortunately is affecting virtually all of Redhat's latest qemu-kvm
>>> packages. The bug that was unintentionally introduced was done so in
>>> response to CVE-2016-5403  Qemu: virtio: unbounded memory allocation on host
>>> via guest leading to DoS.
>>>
>>> Late in the bug thread, they finally posted to a new bug created for the
>>> breaking of live migrate via Bug 1371943 - RHSA-2016-1756 breaks migration
>>> of instances.
>>>
>>> Based off their posts i've been following it's likely going to "hit the
>>> shelves" when RHEL 7.3 / CentOS 7.3 comes out. It does look like they are
>>> backporting it to all their versions of RHEL so that's good.
>>>
>>> But yes this does affect 2.3 as well.
>>>
>>> Corbin Hendrickson
>>> Endurance Cloud Development Lead - Manager
>>> Cell: 801-400-0464
>>>
>>> On Wed, Sep 28, 2016 at 9:13 AM, Van Leeuwen, Robert
>>> <rovanleeuwen at ebay.com> wrote:
>>>>
>>>> > There is a bug in the following:
>>>>
>>>> >
>>>>
>>>> > qemu-kvm-1.5.3-105.el7_2.7
>>>>
>>>> > qemu-img-1.5.3-105.el7_2.7
>>>>
>>>> > qemu-kvm-common-1.5.3-105.el7_2.7
>>>>
>>>>
>>>>
>>>> You might be better of using the RHEV qemu packages
>>>>
>>>> They are more recent (2.3) and have more features compiled into them.
>>>>
>>>>
>>>>
>>>> Cheers,
>>>>
>>>> Robert van Leeuwen
>>>>
>>>>
>>>> _______________________________________________
>>>> OpenStack-operators mailing list
>>>> OpenStack-operators at lists.openstack.org
>>>> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-operators
>>>>
>>>
>>
>
>
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