Open Stack

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
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstack.org/pipermail/openstack-operators/attachments/20130403/99367f76/attachment.html>