[Openstack] Root disks with Ceph
mitch at metauser.net
Wed Sep 11 19:39:08 UTC 2013
I believe what you're referring to is talked about on this blog entry:
With a corresponding blueprint/code fix for havana?
Looked all this up a month or so ago... as I would personally also like to
use Ceph for both ephemeral, cinder and Object storage.
On Wed, Sep 11, 2013 at 12:39 PM, Greg Chavez <greg.chavez at gmail.com> wrote:
> John: I'm talking about primary root disk storage. Secondary storage
> would persist of course.
> Mike: Right, I just want to establish that if I set the default Cinder
> plugin to RBD volumes, and I do nothing else, root volumes are ephemeral.
> That seems to be the case anyway.
> Seems like some of these parameters become meaningless depending on your
> backing store. As another example, do you really need to specify a root
> disk parameter if you're booting from a volume? I would think not.
> Thanks for your responses.
> On Wed, Sep 11, 2013 at 1:29 PM, Mike Dawson <mike.dawson at cloudapt.com>wrote:
>> When you create an instance backed by an RBD Cinder volume, you can
>> specify which behavior you want. There is a check box in Horizon to toggle
>> the behavior.
>> Mike Dawson
>> On 9/11/2013 1:15 PM, Greg Chavez wrote:
>>> So if I use RBD as my storage backend for Cinder, what happens to the
>>> root disks of VMs that I terminate?
>>> Do they still exist as RBD volumes in Ceph or are they
>>> If the answer is that they get deleted, or at the very least OpenStack
>>> no longer keeps track of them, then there isn't much difference between
>>> the root and ephemeral disks in the flavors I am using. other than their
>>> being distinct disk devices. Or so it seems to me.
> --Greg Chavez
> Mailing list:
> Post to : openstack at lists.openstack.org
> Unsubscribe :
-------------- next part --------------
An HTML attachment was scrubbed...
More information about the Openstack