Hi Guys ,

Thanks for the Info .

I am trying to migrate my data from local to Storage domain . But it requires twice the effort in terms of space and time to copy the data to the local file system and then upload the disk to it . 

I created a storage domain and tried to expose it to the NBD server to write the data from the source Vm disk . But I'm facing an nbd permission issue  . Even a copy or write is restricted .

Actual Command
qemu-nbd -f qcow2 /rhev/data-center/mnt/192.168.108.27:_storage/d62b04f8-973f-4168-9e69-1f334a4968b6/images/cd6b9fc4-ef8a-4f40-ac8d-f18d355223d0/d2a57e6f-029e-46cc-85f8-ce151d027dcb

qemu-nbd: Failed to blk_new_open '/rhev/data-center/mnt/192.168.108.27:_storage/d62b04f8-973f-4168-9e69-1f334a4968b6/images/cd6b9fc4-ef8a-4f40-ac8d-f18d355223d0/d2a57e6f-029e-46cc-85f8-ce151d027dcb': Could not open '/rhev/data-center/mnt/192.168.108.27:_storage/d62b04f8-973f-4168-9e69-1f334a4968b6/images/cd6b9fc4-ef8a-4f40-ac8d-f18d355223d0/d2a57e6f-029e-46cc-85f8-ce151d027dcb': Permission denied


Please suggest me if Ovirt has any API  to open a disk from a storage domain and write data to it 

Regards
Shafi

On Wed, Mar 20, 2024 at 3:23 PM Nathanaël Blanchet <blanchet@abes.fr> wrote:
Le mercredi 20 mars 2024 à 12:19 +0530, Shafi Mohammed a écrit :
> Hi Team ,
Hi
>
> I am new to Ovirt and  have been using KVM off late . I use libvirt
> (virt or virsh commands) to create and manage Vms .
Welcome to oVirt community
>
> I have a pretty basic doubt in OVirt . I was trying to migrate a VM
> from my KVM host .I copied my .qcow2 virtual disk to the ovirt host.
you can do this but why not using the import native tool from KVM
provided into the UI?
>
> I am able to create a Vm after uploading the disk to a new storage
> domain and create a VM with the storage domain.
>
> Can I create a VM without using a storage domain ( By directly
> attaching the copied .qcow2 disk ) to the Vm
Storage domains are the local or shared LVM based space where all vms
and related metadata are stored. You can even configure a storage
domain as a backup domain because it contains enough informations
outside of the postgres database. SD is a masterpiece of oVirt so when
you upload a single disk, it is stored to the default storage domain.
That said, regular libvirt/kvm uses as well a SD equivalent by storing
qcow2 images into the default /var/lib/libvirt/images/
>
> Regards
> Shafi 
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--
Nathanaël Blanchet

Administrateur Systèmes et Réseaux
Service Informatique et REseau (SIRE)
Département des systèmes d'information
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