[ovirt-users] Snapshot or not?

[Demeter Tibor]

Hi, 

Thank you for your reply. 

So. I have a disk with snapshot. Or - really - I just think that is a snapshot. It was attached originally to a VM (with other two disks, that is not have snapshot) I did a detach-attach-storage procedure, but after attach, - I don't know why - ovirt could not import the VM and disks from this (ovirt said it is not possible). After this I just wondered, I will make a new VM with same disk and I will copy the images (really just rename) from original to recreated. 

It was partial success because the VM can boot, but the disk, where there is a snapshot I can't read the LVM table. I see just it seems to corrupt. 
Now this disk in a very interested state: I can see the snapshot datas from the vm as raw disk. 
I think Ovirt don't know that is a snapshotted image and attach to VM as raw disk. 

So my really question, how can I add this disk image as good to ovirt? 

Please help me, it is very important me.:( 

Thanks in advance, 

Have a nice day, 

Tibor 

----- 2017. nov.. 16., 11:55, Ala Hino <ahino at redhat.com> írta: 

> Hi Tibor,
> I am not sure I completely understand the scenario.

> You have a VM with two disks and then you create a snapshot including the two
> disks?
> Before creating the snapshot, did the VM recognize the two disks?

> On Mon, Nov 13, 2017 at 10:36 PM, Demeter Tibor < [ mailto:tdemeter at itsmart.hu |
> tdemeter at itsmart.hu ] > wrote:

>> Dear Users,

>> I have a disk of a vm, that is have a snapshot. It is very interesting, because
>> there are two other disk of that VM, but there are no snapshots of them.
>> I found this while I've try to migrate a storage-domain between two datacenter.
>> Because, I didn't import that vm from the storage domain, I did an another
>> similar VM with exactly same sized thin-provisioned disks. I have renamed,
>> copied to here my originals.

>> The VM started successfully, but the disk that contain a snapshot did not
>> recognized by the os. I can see the whole disk as raw. (disk id, format in
>> ovirt, filenames of images, etc) . I think ovirt don't know that is a
>> snapshotted image and use as raw. Is it possible?
>> I don't see any snapshot in snapshots. Also I have try to list snapshots with
>> qemu-img info and qemu-img snapshot -l , but it does not see any snapshots in
>> the image.

>> Really, I don't know how is possible this.

>> [root at storage1 8d815282-6957-41c0-bb3e-6c8f4a23a64b]# qemu-img info
>> 5974fd33-af4c-4e3b-aadb-bece6054eb6b
>> image: 5974fd33-af4c-4e3b-aadb-bece6054eb6b
>> file format: qcow2
>> virtual size: 13T (13958643712000 bytes)
>> disk size: 12T
>> cluster_size: 65536
>> backing file:
>> ../8d815282-6957-41c0-bb3e-6c8f4a23a64b/723ad5aa-02f6-4067-ac75-0ce0a761627f
>> backing file format: raw
>> Format specific information:
>> compat: 0.10

>> [root at storage1 8d815282-6957-41c0-bb3e-6c8f4a23a64b]# qemu-img info
>> 723ad5aa-02f6-4067-ac75-0ce0a761627f
>> image: 723ad5aa-02f6-4067-ac75-0ce0a761627f
>> file format: raw
>> virtual size: 2.0T (2147483648000 bytes)
>> disk size: 244G

>> [root at storage1 8d815282-6957-41c0-bb3e-6c8f4a23a64b]# ll
>> total [ tel:(309)%20698-7560 | 13096987560 ]
>> -rw-rw----. 1 36 36 13149448896512 Nov 13 13:42
>> 5974fd33-af4c-4e3b-aadb-bece6054eb6b
>> -rw-rw----. 1 36 36 1048576 Nov 13 19:34
>> 5974fd33-af4c-4e3b-aadb-bece6054eb6b.lease
>> -rw-r--r--. 1 36 36 262 Nov 13 19:54 5974fd33-af4c-4e3b-aadb-bece6054eb6b.meta
>> -rw-rw----. 1 36 36 2147483648000 Jul 8 2016
>> 723ad5aa-02f6-4067-ac75-0ce0a761627f
>> -rw-rw----. 1 36 36 1048576 Jul 7 2016
>> 723ad5aa-02f6-4067-ac75-0ce0a761627f.lease
>> -rw-r--r--. 1 36 36 335 Nov 13 19:52 723ad5aa-02f6-4067-ac75-0ce0a761627f.meta

>> qemu-img snapshot -l 5974fd33-af4c-4e3b-aadb-bece6054eb6b

>> (nothing)

>> Because it is a very big (13 TB) disk I can't migrate to an another image,
>> because I don't have enough free space. So I just would like to use it in ovirt
>> like in the past.

>> I have a very old ovirt (3.5)

>> How can I use this disk?

>> Thanks in advance,

>> Regards,

>> Tibor

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