Open Stack

It is merged in Mitaka but your glance images must be decorated with:

hw_vif_multiqueue_enabled='true'

when you do "openstack image show uuid"

in the property you should see this, and then you will have multiqueue

Saverio



2017-07-28 14:50 GMT+02:00 John Petrini <jpetrini at coredial.com>:

> Hi Saverio,
>
> Thanks for the info. The parameter is missing completely:
>
>     <interface type='bridge'>
>       <mac address='fa:16:3e:19:3d:b8'/>
>       <source bridge='qbrba20d1ab-30'/>
>       <target dev='tapba20d1ab-30'/>
>       <model type='virtio'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x03'
> function='0x0'/>
>     </interface>
>
> I've came across the blueprint for adding the image property
> hw_vif_multiqueue_enabled. Do you know if this feature is available in
> Mitaka?
>
> John Petrini
>
> Platforms Engineer   //   *CoreDial, LLC*   //   coredial.com   //   [image:
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>
> On Fri, Jul 28, 2017 at 3:59 AM, Saverio Proto <zioproto at gmail.com> wrote:
>
>> Hello John,
>>
>> a common problem is packets being dropped when they pass from the
>> hypervisor to the instance. There is bottleneck there.
>>
>> check the 'virsh dumpxml' of one of the instances that is dropping
>> packets. Check for the interface section, should look like:
>>
>>     <interface type='bridge'>
>>       <mac address='xx:xx:xx:xx:xx:xx'/>
>>       <source bridge='qbr5b3fc033-e2'/>
>>       <target dev='tap5b3fc033-e2'/>
>>       <model type='virtio'/>
>>       <driver name='vhost' queues='4'/>
>>       <alias name='net0'/>
>>       <address type='pci' domain='0x0000' bus='0x00' slot='0x03'
>> function='0x0'/>
>>     </interface>
>>
>> how many queues you have ??? Usually if you have only 1 or if the
>> parameter is missing completely is not good.
>>
>> in Mitaka nova should use 1 queue for every instance CPU core you
>> have. It is worth to check if this is set correctly in your setup.
>>
>> Cheers,
>>
>> Saverio
>>
>>
>>
>> 2017-07-27 17:49 GMT+02:00 John Petrini <jpetrini at coredial.com>:
>> > Hi List,
>> >
>> > We are running Mitaka with VLAN provider networking. We've recently
>> > encountered a problem where the UDP receive queue on instances is
>> filling up
>> > and we begin dropping packets. Moving instances out of OpenStack onto
>> bare
>> > metal resolves the issue completely.
>> >
>> > These instances are running asterisk which should be pulling these
>> packets
>> > off the queue but it appears to be falling behind no matter the
>> resources we
>> > give it.
>> >
>> > We can't seem to pin down a reason why we would see this behavior in
>> KVM but
>> > not on metal. I'm hoping someone on the list might have some insight or
>> > ideas.
>> >
>> > Thank You,
>> >
>> > John
>> >
>> > _______________________________________________
>> > OpenStack-operators mailing list
>> > OpenStack-operators at lists.openstack.org
>> > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-operators
>> >
>>
>
>
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