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> The patch [2] proposes changing the default DNS driver from
> 'nova.network.noop_dns_driver.NoopDNSDriver' to other that verifies if
> DNS entries already exists before adding them, such as the
> 'nova.network.minidns.MiniDNS'.

Changing a default setting in a way that isn't backwards compatible when the cloud admin can already make that config change if they want it doesn't seem like the right thing to do. I think you need to do this in two stages:
1) In Juno deprecate the existing default value first (i.e add a waning for one cycle that says that the default will change) 
2) In K change the default

 

> -----Original Message-----
> From: samuel [mailto:samuel at lsd.ufcg.edu.br]
> Sent: 04 June 2014 15:01
> To: openstack-dev at lists.openstack.org
> Subject: [openstack-dev] [Nova] Different tenants can assign the same
> hostname to different machines without an error
> 
> Hi everyone,
> 
> Concerning the bug described at [1], where n different machines may have
> the same hostname and then n different DNS entries with that hostname are
> written; some points have to be discussed with the nova community.
> 
> On the bug review [2], Andrew Laski pointed out that we should discuss
> about having users getting errors due to the display name they choose.
> He thinks that name should be used purely for aesthetic purposes so I think a
> better approach to this problem would be to decouple display name and DNS
> entries. And display name has never needed to be globally unique before.
> 
> The patch [2] proposes changing the default DNS driver from
> 'nova.network.noop_dns_driver.NoopDNSDriver' to other that verifies if
> DNS entries already exists before adding them, such as the
> 'nova.network.minidns.MiniDNS'.
> 
> What are your thoughts up there?
> 
> Sincerely,
> Samuel Queiroz
> 
> [1] https://bugs.launchpad.net/nova/+bug/1283538
> [2] https://review.openstack.org/#/c/94252/
> 
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