Dmitriy, As Miroslav has mentioned, images in Glance should be in RAW for copy-on-write cloning to be done when a new Cinder volume is created from image. You will also come across this limitation (which, unlike other Ceph related limitations, isn't yet addressed in our patch series for Nova): https://bugs.launchpad.net/nova/+bug/1262914
Regards, -DmitryB On Wed, Jun 25, 2014 at 8:08 AM, Dmitriy Novakovskiy < [email protected]> wrote: > Hi Fuelers, > > One of my customers is testing Fuel 5.0 w/ Ceph. He's trying to boot a VM > from a volume, using qcow2 image as a source for volume creation. What > we're seeing (Nikita in CC was helping w/ troubleshooting) is: > - image is copied from Glance (which uses Ceph as backend) > - image is converted from qcow2 to raw > - new RBD volume is created from raw image > > Looks kinda suboptimal - given both image and boot volume being hosted on > Ceph I'd expect copy-on-write cloning to work. > > Q1) Are there some limitations here, like images stored on Ceph should be > in RAW initially? > Q2) Would the same (images should be in raw) apply to boot from image > scenario, when VM's ephemeral disk is stored on Ceph? > > Thoughts much appreciated. If necessary I can arrange for someone to take > a look at customer's pod > > --- > Regards, > Dmitriy > > -- > Mailing list: https://launchpad.net/~fuel-dev > Post to : [email protected] > Unsubscribe : https://launchpad.net/~fuel-dev > More help : https://help.launchpad.net/ListHelp > > -- Dmitry Borodaenko
-- Mailing list: https://launchpad.net/~fuel-dev Post to : [email protected] Unsubscribe : https://launchpad.net/~fuel-dev More help : https://help.launchpad.net/ListHelp
