Open Stack

Hi,

I can think of two alternative  solutions for maintaining uniqueness:

1.       DB look up: After generating a new MAC address, checking uniqueness by doing  a DB look up.

2.       Having a 'unique' constraint on the 'mac_address' column and handle the DB IntegrityError and retry generating a new MAC address.

I also think, initializing the 'random.seed' in start-up process of Quantum server (with a different value - configurable one; on each server) could help in reducing conflicts.

I think either of the above solutions could be used for fixing LP bug #1050924.

Thanks & Regards,
Unmesh Gurjar | Lead Engineer | NTT DATA Global Technology Services Private Limited | w. +91.20.6604.1500 x 379 | m. +91.982.324.7631 | unmesh.gurjar at nttdata.com<mailto:unmesh.gurjar at nttdata.com> | Learn more at nttdata.com/americas

From: openstack-bounces+unmesh.gurjar=nttdata.com at lists.launchpad.net [mailto:openstack-bounces+unmesh.gurjar=nttdata.com at lists.launchpad.net] On Behalf Of Neelakantam Gaddam
Sent: Friday, October 26, 2012 11:37 AM
To: mthode at mthode.org
Cc: openstack at lists.launchpad.net
Subject: Re: [Openstack] MAC address uniqueness in folsom

Hi,

We want unique MAC addresses in our environment only but across multiple tenants.

Thanks for quick reply.

---
Neelakantam
On Fri, Oct 26, 2012 at 9:38 AM, Matthew Thode <mthode at mthode.org<mailto:mthode at mthode.org>> wrote:
On 10/25/2012 11:02 PM, Neelakantam Gaddam wrote:
> Hi All,
>
> Does the MAC address generated in quantum is unique across tenants in
> folsom?
> I am developing an application that requires unique MAC address. If not
> unique, is there any way to make MAC address unique?
>
> Please help me. Thanks in advance.
>
>
>
>
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Do you need it to be globally unique (amongst all macs on earth) or
simply unique in your environment?

--
-- Matthew Thode


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Thanks & Regards
Neelakantam Gaddam

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