On 20-04-20 11:51:52, Radosław Piliszek wrote:
Hi Fellow OpenStackers!
I have a question regarding nova-cinder-ceph deployment configuration. Most notably ephemeral storage.
So - if I configure Nova to use Ceph as ephemeral storage and Cinder's only backend is Ceph as well then how does ephemeral storage differ from persistent storage now except for interface from Cinder rather than Nova (and all that comes with that) and a different pool? Was Nova's Ceph integration added just to be able to avoid Cinder in certain scenarios?
The original change introducing support suggests this was due to Nova not supporting booting from volumes in 2013? Add RBD supporting to libvirt for creating local volume https://review.opendev.org/#/c/36042/
Other Cinder backends did not get support from Nova.
Yeah as since I've worked on Nova we've mostly pushed devs and users to Cinder for any additional exotic storage backend support. Cheers, -- Lee Yarwood A5D1 9385 88CB 7E5F BE64 6618 BCA6 6E33 F672 2D76