[one-users] reupload RBD images

[Vladislav Gorbunov]

You can create create image in open nebula pool radios from existing
rbd image rados/foo with command like:
oneimage create -d rados --name foo --type os --persistent --size `rbd
info rados/foo|awk '/size/ {print $5*4}'` --source rados/foo

2014/1/17 Matthew Richardson <m.richardson at ed.ac.uk>:
> On 17/01/14 04:23, Kenneth wrote:
>> So our frontend crashed yesterday and I can't recover any of data from it.
>>
>> All images are saved on ceph datastore. Now when I install the new
>> frontend, I know that the sunstone GUI will be empty, how can I reupload
>> the images from the ceph RBD?
>
> I'm not sure what opennebula will do if there is already a ceph rbd
> image with the name that it wants to use when creating a new image -
> however there is a safe, if a bit more laborious way to do it...
>
> 1) Rename all the images in ceph for safety before you start:
> rbd mv one-1 one-1-orig
>
> 2) Create new images from opennebula, using the same specs you used to
> create the original ones.  You should now see 'one-1' etc in ceph. It
> doesn't matter what the images contain (i.e. they can be empty) but you
> should make sure to create them with the same name, type, size,
> persistence etc.
>
> 3) Stop opennebula to prevent any more changes
>
> 4) Delete the empty images in ceph (Make sure you're not deleting the
> originals here!):
> rbd rm one-1
>
> 5) Move the original images back to the corresponding names:
> rbd mv one-1-orig one-1
>
> 6) Restart opennebula
>
>
> Hope this helps!
>
> Matthew
>
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