[one-users] Problems with qcow2 images

[Alexander Fedulov]

I have modified the nfs exports on my ON manager host by adding 
no_root_squash:
     /srv/cloud      192.168.144.21(rw,no_root_squash)
     /srv/cloud      192.168.144.22(rw,no_root_squash)

- no changes, the same error:
     qemu: could not open disk image 
/srv/cloud/one/var//41/images/disk.0: Permission denied

Permissions of the disk.0 before the failure seem to be fine:
     -rw-rw-rw- 1 oneadmin cloud 262144 2011-01-26 15:29 disk.0


During the deployment, before disk.0 was erased, I was able to access 
the disk image from the executing host as root.
     root at brandy:/var/log/libvirt/qemu# qemu-img info 
/srv/cloud/one/var/41/images/disk.0
     image: /srv/cloud/one/var/41/images/disk.0
     file format: qcow2
     ...

I am really stuck and hope for your help. Many  thanks in advance.

Yours sincerely,
Alexander


On 24.01.2011 15:00, Alexander Fedulov wrote:
> Here are permissions for the image and for the base image:
>> -rw-r--r--  1 oneadmin cloud     262144 2011-01-20 19:23 qcow.img
>> -rw-r--r--  1 oneadmin cloud 2147483648 2010-11-19 12:22 ubuntu10-04.img
>
> ...and for the folders (/srv/cloud/temp and up):
>
>> drwxr-xr-x  3 oneadmin cloud       4096 2011-01-24 14:32 .
>> drwxr-xr-x 12 oneadmin cloud       4096 2011-01-18 12:01 ..
>
>
> These are the permissions for disk.0 before it is deleted due to failure:
>> -rw-rw-rw- 1 oneadmin cloud 262144 2011-01-24 14:45 disk.0
>
> Any thoughts?
>
> On 24.01.2011 12:10, Javier Fontan wrote:
>> 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?
>>>
>>> _______________________________________________
>>> Users mailing list
>>> Users at lists.opennebula.org
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>>>
>>
>>
>
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