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What CentOS images are you using? These have worked for me:

https://github.com/rackerjoe/oz-image-build


On Wed, Apr 3, 2013 at 2:13 PM, Lorin Hochstein <lorin at nimbisservices.com>wrote:

> Hi Joe:
>
> It happens immediately thereafter. CentOS images have never worked on our
> setup.
>
> Lorin
>
>
> On Wed, Apr 3, 2013 at 3:30 PM, Joe Topjian <joe.topjian at cybera.ca> wrote:
>
>> Hi Lorin,
>>
>> Does this happen shortly after the guests were created? Or usually a few
>> hours/days later? If the latter, are these guests seeing large amounts of
>> bandwidth?
>>
>> Thanks,
>> Joe
>>
>>
>> On Wed, Apr 3, 2013 at 1:16 PM, Lorin Hochstein <lorin at nimbisservices.com
>> > wrote:
>>
>>> Hi all:
>>>
>>> I'm having a strange issue where networking on my CentOS guests isn't
>>> working properly, but things are working fine with my Ubuntu guests.
>>>
>>> I'm running Folsom on Ubuntu 12.04, nova-network, not multi-host.
>>>
>>> The first symptom is that CentOS instances don't get IP addresses via
>>> DHCP. If I trace the DHCP requests and replies using tcpdump, I can see the
>>> reply from dnsmasq reach the vnetX interface of the compute host, but it
>>> doesn't get to the eth0 interface of the compute host. (I'm at a loss here
>>> about how to debug something like that).
>>>
>>> If I try to statically configure an IP address on the guest instead,
>>> networking still doesn't work. I can't ping anything on the subnet, and I
>>> don't even see the icmp traffic on vnetX of the host.
>>>
>>> I've tried this twiddling the following options, but no change in
>>> behavior:
>>>
>>> * Adding the following rule to nova-network node: iptables -A
>>> POSTROUTING -t mangle -p udp --dport bootpc -j CHECKSUM --checksum-fill
>>> * Adding the same rule to nova-compute node
>>> * Setting libvirt_use_virtio_for_bridge to "yes" and "no" (restarting
>>> nova-compute, re-launching instances)
>>> * With and without vhost_net loaded in nova-compute (restarting
>>> nova-compute, re-launching instances)
>>> * Disabling iIpv6 inside of the CentOS guest
>>>
>>> Has anybody encountered this before?
>>>
>>> Lorin
>>>
>>> --
>>> Lorin Hochstein
>>> Lead Architect - Cloud Services
>>> Nimbis Services, Inc.
>>> www.nimbisservices.com
>>>
>>> _______________________________________________
>>> OpenStack-operators mailing list
>>> OpenStack-operators at lists.openstack.org
>>> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-operators
>>>
>>>
>>
>>
>> --
>> Joe Topjian
>> Systems Administrator
>> Cybera Inc.
>>
>> www.cybera.ca
>>
>> Cybera is a not-for-profit organization that works to spur and support
>> innovation, for the economic benefit of Alberta, through the use
>> of cyberinfrastructure.
>>
>
>
>
> --
> Lorin Hochstein
> Lead Architect - Cloud Services
> Nimbis Services, Inc.
> www.nimbisservices.com
>



-- 
Joe Topjian
Systems Administrator
Cybera Inc.

www.cybera.ca

Cybera is a not-for-profit organization that works to spur and support
innovation, for the economic benefit of Alberta, through the use
of cyberinfrastructure.
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