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[charms] placement charm

On Fri, Oct 4, 2019 at 9:41 AM Corey Bryant <corey.bryant at>

> Hi All,
> I'd like to see if I can get some input on the current state of the
> Placement API split.
> For some background, the nova placement API was removed from nova in
> train, and it's been split into its own project. It's mostly just a basic
> API charm. The tricky part is the migration of tables from the nova_api
> database to the placement database.
> Code is located at:
> Test scenarios I've been testing with:
> 1) deploy nova-cc et al train, configure keystonev3, deploy instance
> 2) deploy nova-cc et al stein, configure keystonev3, deploy instance 1,
> deploy placement train, deploy instance 2, upgrade nova-cc to train, deploy
> instance 3
> There is currently an issue with the second test scenario where instance 2
> creation errors because nova-scheduler can't find a valid placement
> candidate (not sure of the exact error atm). However if I delete instance 1
> before creating instance 2 it is created successfully. It feels like a DB
> related issue but I'm really not sure so I'll keep digging.
Nothing to see here. Small compute node with limited resources. So this is
not an issue.

> Corey
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