[Openstack-operators] [openstack-dev] [nova] Hard fail if you try to rename an AZ with instances in it?

Matt Riedemann mriedemos at gmail.com
Fri Sep 14 17:24:03 UTC 2018

On 3/28/2018 4:35 PM, Jay Pipes wrote:
> On 03/28/2018 03:35 PM, Matt Riedemann wrote:
>> On 3/27/2018 10:37 AM, Jay Pipes wrote:
>>> If we want to actually fix the issue once and for all, we need to 
>>> make availability zones a real thing that has a permanent identifier 
>>> (UUID) and store that permanent identifier in the instance (not the 
>>> instance metadata).
>>> Or we can continue to paper over major architectural weaknesses like 
>>> this.
>> Stepping back a second from the rest of this thread, what if we do the 
>> hard fail bug fix thing, which could be backported to stable branches, 
>> and then we have the option of completely re-doing this with aggregate 
>> UUIDs as the key rather than the aggregate name? Because I think the 
>> former could get done in Rocky, but the latter probably not.
> I'm fine with that (and was fine with it before, just stating that 
> solving the problem long-term requires different thinking)
> Best,
> -jay

Just FYI for anyone that cared about this thread, we agreed at the Stein 
PTG to resolve the immediate bug [1] by blocking AZ renames while the AZ 
has instances in it. There won't be a microversion for that change and 
we'll be able to backport it (with a release note I suppose).

[1] https://bugs.launchpad.net/nova/+bug/1782539




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