[resending to the list]
On 10/12/2015 06:46 PM, Cory Hawkless wrote:
In my setup I have one Ceph cluster but 2 different pools, one for
images which is on SATA disks and one for volumes which is on faster SAS
disks.
Given this setup I don’t imagine there is any way to thin provision an
image to a volume? It would need to be a complete copy from one pool to
another, yes?
In ceph cloning between pools is possible, and is a common
configuration. Your setup sounds like it should be doing this, since
you have the images in raw format. Compare your cinder and glance
config files and your ceph auth settings with this:
http://docs.ceph.com/docs/master/rbd/rbd-openstack/#setup-ceph-client-authentication
Josh
I’m certainly not in a position to be able to contribute to a code
change, I’m surprised this hasn’t been done already, it seems terribly
inefficient to have to copy the images twice?
Regards,
Cory
*From:*Avishay Traeger [mailto:avis...@stratoscale.com]
*Sent:* Monday, 12 October 2015 9:55 PM
*To:* Cory Hawkless <c...@hawkless.id.au>
*Cc:* openstack@lists.openstack.org
*Subject:* Re: [Openstack] Volume from image question
The flow for all images for this process is to download from Glance to a
temporary file, and then write to volume. This is not necessary for raw
images, but that optimization has not been done. I did leave a comment
about that in the code though 2.5 years ago, but never implemented it -
you can give it a go if you'd like :-)
Are you using two different Ceph clusters, one for images and one for
volumes? Otherwise it should just be doing a thin provisioned clone of
the image (no download, no temp space, no upload).
On Mon, Oct 12, 2015 at 12:27 PM, Cory Hawkless <c...@hawkless.id.au
<mailto:c...@hawkless.id.au>> wrote:
Hi all,
When creating a volume from an image(Using Horizon), why does the
Cinder server need to do what appears to be a conversion of the
image before it can create the volume?
All of my images in Glance are uploaded in RAW format, images and
volumes are stored in Ceph.
The reason I know the images are being processed on my glance server
is because it runs out of disk space when trying to make volumes
from large images and the process fails. I can see the temporary
file in /var/lib/cinder/conversion
Is it not possible to have glance simply copy the image form the
images store into the volumes store? I am going to regularly be
creating new Windows Server instances, so it would take quite some
time for a 20gb image to be processed by Cinder before it can be
uploaded into Ceph.
Regards,
Cory
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