[charms] placement charm

Corey Bryant corey.bryant at canonical.com
Fri Oct 4 15:53:35 UTC 2019

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

> 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:
> https://github.com/coreycb/charm-placement
> https://github.com/coreycb/charm-interface-placement
> https://review.opendev.org/#/q/topic:charms-train-placement+(status:open+OR+status:merged)
> 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.
> Thanks!
> Corey

In case anyone needs these for testing prior to the code getting merged
I've pushed placement and nova-cloud-controller charms to the charm store
under my namespace. I've released them to the edge channel.


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