[one-users] Problems with qcow2 images

[Javier Fontan]

Is /srv/cloud/temp/ubuntu10-04/qcow.img readable by root? It needs to
be readable by root in the execution node. Also check the permissions
in for the directories where it is stored.

tm_clone.sh should have changed permissions for
"/srv/cloud/one/var//24/images/disk.0" check if that is correct. root
is the user that is accessing these files but with NFS sharing you
have to give the permissions for all or add no_root_squash to the
exporting parameters.

On Thu, Jan 20, 2011 at 8:17 PM, Alexander Fedulov
<alexander.fedulov at fokus.fraunhofer.de> wrote:
> I created a qcow2 image from a raw image like this:
>>
>> qemu-img create -f qcow2 -b ubuntu10-04.img qcow.img
>
> The DISC section of of my deployment descriptor looks like this:
>>
>> DISK   = [
>>  source   = "/srv/cloud/temp/ubuntu10-04/qcow.img",
>>  target   = "sda",
>>  readonly = "no" ,
>>  DRIVER = qcow2]
>
> I have edited the ~/lib/tm_commands/nfs/th_clone.sh file according to this
> https://support.opennebula.pro/entries/348847-using-qcow-images without the
> SSH part:
>
>> *)
>>    log "Cloning $SRC_PATH"
>>    exec_and_log "qemu-img create -f qcow2 -o backing_file=$SRC_PATH
>> $DST_PATH"
>>    ;;
>> esac
>
> Unfortunately deployment fails and this is what I find in the one-*.log
> files in the /var/log/libvirt/qemu folder of a target host.
>
>> LC_ALL=C PATH=/usr/local/sbin:/usr/local/bin:/usr/bin:/usr/sbin:/sbin:/bin
>> QEMU_AUDIO_DRV=none /usr/bin/kvm -S -M pc-0.12 -enable-kvm -m 768 -smp 1
>> -name one-24 -uuid 9f3d9ed7-d17f-e6d1-d997-5fed5a84aa47 -chardev
>> socket,id=monitor,path=/var/lib/libvirt/qemu/one-24.monitor,server,nowait
>> -monitor chardev:monitor -no-acpi -boot c -drive
>> file=/srv/cloud/one/var//24/images/disk.0,if=scsi,index=0,boot=on,format=qcow2
>> -drive
>> file=/srv/cloud/one/var//24/images/disk.1,if=scsi,media=cdrom,index=2,format=raw
>> -net nic,macaddr=02:00:c0:a8:90:22,vlan=0,name=nic.0 -net
>> tap,fd=54,vlan=0,name=tap.0 -serial none -parallel none -usb -vnc 0.0.0.0:20
>> -k de -vga cirrus
>> qemu: could not open disk image /srv/cloud/one/var//24/images/disk.0:
>> Permission denied
>
> Deployment of raw images works fine. The version of ON is 2.0.1.
>
> I was wondering, whether there is some chmod operation that has to be added
> to the tm_clone.sh script or is the problem in something else?
>
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>



-- 
Javier Fontan, Grid & Virtualization Technology Engineer/Researcher
DSA Research Group: http://dsa-research.org
Globus GridWay Metascheduler: http://www.GridWay.org
OpenNebula Virtual Infrastructure Engine: http://www.OpenNebula.org