Re: [Libguestfs] [PATCH v7 6/6] v2v: Add -o rhv-upload output mode (RHBZ#1557273).

On Thu, Mar 22, 2018 at 5:25 PM Richard W.M. Jones <rjones(a)redhat.com&gt; wrote: > PROBLEMS: > - -of qcow2 does not work, with multiple problems > * needs to set NBD size to something larger than virtual size > How is this related to the actual file size specified when you create a disk? In block storage, qcow2 image is always on a thin provisioned disk, which in oVirt is a regular logical volume, created at the requested "initial_size": From: https://github.com/oVirt/ovirt-engine-sdk/blob/aba2a83ec94ecac1594adfff62... if image_info["format"] == "qcow2": disk_format = types.DiskFormat.COW else: disk_format = types.DiskFormat.RAW disks_service = connection.system_service().disks_service() disk = disks_service.add( disk=types.Disk( name=os.path.basename(image_path), description='Uploaded disk', format=disk_format, initial_size=image_size, provisioned_size=image_info["virtual-size"], sparse=disk_format == types.DiskFormat.COW, storage_domains=[ types.StorageDomain( name='mydata' ) ] ) ) Internally we do allocated 10% more then the requested initial_size to leave room for qcow2 metadata.

[snipped] > + # Create the disk. > + disks_service = system_service.disks_service() > + if params['disk_format'] == "raw": > + disk_format = types.DiskFormat.RAW > + else: > + disk_format = types.DiskFormat.COW > + disk = disks_service.add( > + disk = types.Disk( > + name = params['disk_name'], > + description = "Uploaded by virt-v2v", > + format = disk_format, > + provisioned_size = params['disk_size'], > This must be the virtual size. You don't specify initial_size - in this case you get 1G, and most images will fail to upload.