[one-users] management of qcow2 images

[Rolandas Naujikas]

Hi,

On 2013-07-15 14:35, Ruben S. Montero wrote:
> Hi Rolandas
>
> So the problem is how to update the version of an image, right? We are
> currently copying the new file to the SOURCE of the image something like:
>
> cp debian_new.qcow2 `oneimage show debian |  | grep SOURCE | cut -d':' -f2`
>
> This way you do not need to modify the qcow driver.

As I wrote in http://mif.vu.lt/~rolnas/stsc/qcow2.txt we cannot simple 
replace qcow2 image with cp or mv, because original image could still be 
in use by some VM (referenced as backed file in snapshot qcow2). Until 
VM is running it is OK, because original file is still open by kvm, but 
when VM is stopped or turned off (power off), kvm process is terminated 
and original file is deleted, but snapshot qcow2 is still referencing 
original file by pathname.

Regards
Rolandas Naujikas

> Does it make sense in your setup?
>
> Cheers
>
> Ruben
>
>
> On Fri, Jul 5, 2013 at 9:42 AM, Rolandas Naujikas
> <rolandas.naujikas at mif.vu.lt <mailto:rolandas.naujikas at mif.vu.lt>> wrote:
>
>     Hi,
>
>     For management of master images in qcow2 format we created a
>     solution described here http://mif.vu.lt/~rolnas/stsc/__qcow2.txt
>     <http://mif.vu.lt/%7Erolnas/stsc/qcow2.txt>. Hope it could solve
>     some management troubles and we are looking for improvements in
>     OpenNebula also.
>
>     Regards, Rolandas Naujikas
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>     Ruben S. Montero, PhD
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