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Hi, Javier.<br>
<br>
I have double checked, that the root has access to both disk.0 and
to the base image from the hosting node. It is apparently not a
problem. What could be the difference between the qcow2 images
booting and the raw images booting from the access rights
perspective? The raw images are starting fine.<br>
<br>
Best,<br>
Alex<br>
<br>
<br>
-------- Original Message --------
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<th nowrap="nowrap" align="RIGHT" valign="BASELINE">Subject: </th>
<td>Re: [one-users] Problems with qcow2 images</td>
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<th nowrap="nowrap" align="RIGHT" valign="BASELINE">Date: </th>
<td>Wed, 26 Jan 2011 15:41:51 +0100</td>
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<th nowrap="nowrap" align="RIGHT" valign="BASELINE">From: </th>
<td>Alexander Fedulov
<a class="moz-txt-link-rfc2396E" href="mailto:alexander.fedulov@fokus.fraunhofer.de"><alexander.fedulov@fokus.fraunhofer.de></a></td>
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<th nowrap="nowrap" align="RIGHT" valign="BASELINE">To: </th>
<td><a class="moz-txt-link-abbreviated" href="mailto:users@lists.opennebula.org">users@lists.opennebula.org</a></td>
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<br>
<pre>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@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
>> <a class="moz-txt-link-rfc2396E" href="mailto:alexander.fedulov@fokus.fraunhofer.de"><alexander.fedulov@fokus.fraunhofer.de></a> 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
>>> <a class="moz-txt-link-freetext" href="https://support.opennebula.pro/entries/348847-using-qcow-images">https://support.opennebula.pro/entries/348847-using-qcow-images</a>
>>> 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
>>> <a class="moz-txt-link-abbreviated" href="mailto:Users@lists.opennebula.org">Users@lists.opennebula.org</a>
>>> <a class="moz-txt-link-freetext" href="http://lists.opennebula.org/listinfo.cgi/users-opennebula.org">http://lists.opennebula.org/listinfo.cgi/users-opennebula.org</a>
>>>
>>
>>
>
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</pre>
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