[nova] Per-instance serial number implementation question

Matt Riedemann mriedemos at gmail.com
Fri Jan 25 16:09:11 UTC 2019

On 1/25/2019 9:03 AM, Stephen Finucane wrote:
> At the
> risk of rehasing what's in the spec, if there aren't cases where users
> would want 'hw_unique_serial=False' then what is the upside of ever
> supporting non-unique serials going forward? Could we not just default
> to unique serials, avoiding these knobs?

The answer to this, and Jay's same question elsewhere in this thread, is 
likely going to need to come from danpb who I think originally added the 
serial stuff in the libvirt driver. I could not find discussions about 
why the serial was per-host rather than per-guest in the original code 
changes. So besides "this is the way it's always been" and I'm risk 
averse to backward incompatible changes, I don't have a good answer.




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