Open Stack

On Wed, Aug 15, 2012 at 10:40 AM, Narayan Desai <narayan.desai at gmail.com> wrote:
> On Wed, Aug 15, 2012 at 9:35 AM, Thomas Vachon <vachon at sessionm.com> wrote:
>> On Wed, Aug 15, 2012 at 10:32 AM, Narayan Desai <narayan.desai at gmail.com> wrote:
>>> On Wed, Aug 15, 2012 at 9:31 AM, Thomas Vachon <vachon at sessionm.com> wrote:
>>>> On Wed, Aug 15, 2012 at 10:28 AM, Narayan Desai <narayan.desai at gmail.com> wrote:
>>>>> On Wed, Aug 15, 2012 at 9:16 AM, Thomas Vachon <vachon at sessionm.com> wrote:
>>>>>> On Wed, Aug 15, 2012 at 9:58 AM, Thomas Vachon <vachon at sessionm.com> wrote:
>>>>>>> On Wed, Aug 15, 2012 at 8:54 AM, Thomas Vachon <vachon at sessionm.com> wrote:
>>>>>>>>
>>>>>>>> On Wed, Aug 15, 2012 at 8:53 AM, Narayan Desai <narayan.desai at gmail.com> wrote:
>>>>>>>> > On Wed, Aug 15, 2012 at 7:24 AM, Thomas Vachon <vachon at sessionm.com> wrote:
>>>>>>>> >
>>>>>>>> >> I am also on Precise.  Downing/Up'ing the interface via VNC did work.
>>>>>>>> >> How exactly did you setup vhost_net, can you provide your libvirt?
>>>>>>>> >
>>>>>>>> > Hm, that might mean that isn't the problem, but this is an easy enough
>>>>>>>> > thing to check.
>>>>>>>> >
>>>>>>>> > Setting up vhost_net is pretty easy; it is auto-detected by kvm, so
>>>>>>>> > all you need to do is modprobe it on the hypervisor.
>>>>>>>> >  -nld
>>>>>>>>
>>>>>>>> Found the docs saying that.  It might help, I will report back on this
>>>>>>>> thread when I run the tests in a bit
>>>>>>>
>>>>>>> OK, I lost all connectivity between nova-network and my vm's.  DNSMasq
>>>>>>> is running and I added the vhost_net module (and confirmed libvirt
>>>>>>> sees it).  Do I need to do something to the guests now too?
>>>>>>
>>>>>> I think I found the root bug:
>>>>>> https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/997978
>>>>>
>>>>> Yeah, this is where i found the vhost_net workaround. (it seems to
>>>>> work for some people and not for others, so I suspect the problem is
>>>>> more complicated somehow)
>>>>>  -nld
>>>>
>>>> The workaround of adding it?  When I added it, I lose all connectivity
>>>> to the instances.
>>>
>>> Yeah, I think that all instances will need to be restarted. Or freshly
>>> spawned even.
>>>  -nld
>>
>> I rebooted the whole thing (physical and all).  I also launched a
>> Cirros image and it had no connectivity.  I removed it, rebooted the
>> physical and I can connect now at least.
>>
>> It seems to be highly related to bonding multiple nic's together on
>> the physical host for FT and HA.
>
> Hm. That could be. I wasn't doing that. Oddly enough, there was only
> one type of system (HP DL580G7) that had this issue; all of my other
> nodes didn't suffer from the same issue.
>  -nld

I'm using Dell R620's and seeing this.  They use Broadcom NetExtreme II's