[ptg][nova][cinder] x-p meeting minutes

Sylvain Bauza sbauza at redhat.com
Tue Nov 12 14:07:05 UTC 2019

Excerpts taken from https://etherpad.openstack.org/p/shanghai-ptg-cinder
We discussed two items :

1/ Improving replication

   - When a failover happens volumes are no longer usable in Nova.

   - Nova should start re-attaching volumes after a failover?

   - Why can't we detach and attach the volume?  Data that is in flight
   would be lost.

   - Question about boot from volume.  In that case the instance is dead
   anyway because access to the volume has been lost.

   - Could go through the shutdown, detach, attach, reboot path.

   - Problem is that detach is going to fail.  Need to force it or handle
   the failure.

   - We aren't sure that Nova will allow a detach of a boot volume.

   - Also don't currently have a force detach API.

   - AGREE:  Need to figure out how to pass the force to os-brick to detach
   volume and when rebooting a volume.

2/ Nova bug for images created from encrypted volumes

   - Nova is not creating a new key for encrypted images but the deletion
   policy metadata can allow a key to be deleted wehn it is still in use by
   other images or even volumes

   - Nova needs to clone the keys when doing create image.

   - The nova team thinks that we have found a bug that needs to be fixed.
   We just need to open a bug.

   - ACTION  Cinder to open a bug against Nova. (can you also ping lyarwood
   when it's open?)

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