[one-users] QEMU Error: could not open disk image

[Ruben Diez]

Well: we just found a solution:

you must edit the "/etc/libvirt/qemu.conf" file and add the lines:
user = "oneadmin"
group = "cloud"

and, of course, restart the libvirt stuff....

Regards


Ruben Diez escribió:
> We found some problem that Huang....
>
> The issue seems to be related to how the virsh command works. Look to 
> this command sequence:
> =================
>
> oneadmin at nubacesga-09-2:~/var/339/images$ ls -l
> total 6291864
> -rwxrwxrwx 1 oneadmin cloud       1065 Sep 22 12:53 deployment.0
> -rwxrwxrwx 1 oneadmin cloud 1073741824 Sep 22 12:52 disk.0
> -rwxrwxrwx 1 oneadmin cloud 5368709120 Sep 22 12:53 disk.1
> -rwxrwxrwx 1 oneadmin cloud     405504 Sep 22 12:53 disk.2
> oneadmin at nubacesga-09-2:~/var/339/images$
>
> oneadmin at nubacesga-09-2:~/var/339/images$ virsh --connect 
> qemu:///system create deployment.0
> error: Failed to create domain from deployment.0
> error: internal error process exited while connecting to monitor: 
> qemu: could not open disk image /srv/cloud/one/var//339/images/disk.0: 
> Permission denied
>
> oneadmin at nubacesga-09-2:~/var/339/images$ ls -l
> total 6291864
> -rwxrwxrwx 1 oneadmin     cloud       1065 Sep 22 12:53 deployment.0
> -rwxrwxrwx 1 root         root  1073741824 Sep 22 12:52 disk.0
> -rwxrwxrwx 1 root         root  5368709120 Sep 22 12:53 disk.1
> -rwxrwxrwx 1 libvirt-qemu kvm       405504 Sep 22 12:53 disk.2
>
> =================
>
> As you can see, the virsh command change the file owned at some 
> point..., and then the original user (oneadmin) can't read the image file
>
> Anyone know how to arrange this issue????
>
> Regards
>
>
>
> Jaime Melis escribió:
>> Hello,
>>
>> It looks like the problem is the NFS configuration. KVM runs as root
>> and needs read/write acces to the disk image. It this disk image has
>> been exported by NFS with the root_squash option (by default) the
>> local root user of the worker node won't have the permissions it
>> needs. You might wan't to change your /etc/exports in the frontend (or
>> NFS server) and configure it with no_root_squash.
>>
>> Regards,
>> Jaime
>>
>> On Wed, Sep 1, 2010 at 3:56 PM, Huang Zhiteng <winston.d at gmail.com> 
>> wrote:
>>  
>>> Hi guys,
>>>
>>> I encountered a qemu error while using ONE 2.0b.  Does anyone have 
>>> any idea
>>> what is wrong?
>>> "error: internal error process exited while connecting to monitor: 
>>> qemu:
>>> could not open disk image /srv/cloud/one/var//16/images/disk.0: 
>>> Permission
>>> denied"
>>>
>>> My environment is:
>>> Hardware:
>>> Intel Xeon 2.93GHz x 2
>>> 12 GB memory
>>>
>>> Software:
>>> RHEL 6 beta (kernel 2.6.32)
>>> qemu-kvm-0.12.1.2
>>>
>>> SELinux is disabled on all nodes/front-end.  So the root cause 
>>> shouldn't be
>>> SELinux.  Below is error log from ONE.
>>>
>>> Wed Sep  1 18:46:47 2010 [DiM][I]: New VM state is ACTIVE.
>>> Wed Sep  1 18:46:50 2010 [LCM][I]: New VM state is PROLOG.
>>> Wed Sep  1 18:46:50 2010 [VM][I]: Virtual Machine has no context
>>> Wed Sep  1 18:47:40 2010 [TM][I]: tm_clone.sh:
>>> rhel6-nhm:/srv/cloud/one/var/images/9c2fea820bf6ec3793dfb6102e5834d41c4bd481 
>>>
>>> n5:/srv/cloud/one/var//16/images/disk.0
>>> Wed Sep  1 18:47:40 2010 [TM][I]: tm_clone.sh: DST:
>>> /srv/cloud/one/var//16/images/disk.0
>>> Wed Sep  1 18:47:40 2010 [TM][I]: tm_clone.sh: Creating directory
>>> /srv/cloud/one/var//16/images
>>> Wed Sep  1 18:47:40 2010 [TM][I]: tm_clone.sh: Executed "mkdir -p
>>> /srv/cloud/one/var//16/images".
>>> Wed Sep  1 18:47:40 2010 [TM][I]: tm_clone.sh: Executed "chmod a+w
>>> /srv/cloud/one/var//16/images".
>>> Wed Sep  1 18:47:40 2010 [TM][I]: tm_clone.sh: Cloning
>>> /srv/cloud/one/var/images/9c2fea820bf6ec3793dfb6102e5834d41c4bd481
>>> Wed Sep  1 18:47:40 2010 [TM][I]: tm_clone.sh: Executed "cp
>>> /srv/cloud/one/var/images/9c2fea820bf6ec3793dfb6102e5834d41c4bd481
>>> /srv/cloud/one/var//16/images/disk.0".
>>> Wed Sep  1 18:47:40 2010 [TM][I]: tm_clone.sh: Executed "chmod a+w
>>> /srv/cloud/one/var//16/images/disk.0".
>>> Wed Sep  1 18:47:55 2010 [LCM][I]: New VM state is BOOT
>>> Wed Sep  1 18:47:55 2010 [VMM][I]: Generating deployment file:
>>> /srv/cloud/one/var/16/deployment.0
>>> Wed Sep  1 18:47:58 2010 [VMM][I]: Command execution fail: 'mkdir -p
>>> /srv/cloud/one/var//16/images && cat >
>>> /srv/cloud/one/var//16/images/deployment.0 && virsh --connect
>>> qemu+tcp:///system create /srv/cloud/one/var//16/images/deployment.0'
>>> Wed Sep  1 18:47:58 2010 [VMM][I]: STDERR follows.
>>> Wed Sep  1 18:47:58 2010 [VMM][I]: error: Failed to create domain from
>>> /srv/cloud/one/var//16/images/deployment.0
>>> Wed Sep  1 18:47:58 2010 [VMM][I]: error: internal error process exited
>>> while connecting to monitor: qemu: could not open disk image
>>> /srv/cloud/one/var//16/images/disk.0: Permission denied
>>> Wed Sep  1 18:47:58 2010 [VMM][I]:
>>> Wed Sep  1 18:47:58 2010 [VMM][I]: ExitCode: 1
>>> Wed Sep  1 18:47:58 2010 [VMM][E]: Error deploying virtual machine
>>> Wed Sep  1 18:48:02 2010 [DiM][I]: New VM state is FAILED
>>> Wed Sep  1 18:48:03 2010 [TM][W]: Ignored: LOG - 16 tm_delete.sh: 
>>> Deleting
>>> /srv/cloud/one/var//16/images
>>>
>>> Wed Sep  1 18:48:03 2010 [TM][W]: Ignored: LOG - 16 tm_delete.sh: 
>>> Executed
>>> "rm -rf /srv/cloud/one/var//16/images".
>>>
>>> Wed Sep  1 18:48:03 2010 [TM][W]: Ignored: TRANSFER SUCCESS 16 -
>>>
>>>
>>> -- 
>>> Regards
>>> Huang Zhiteng
>>>
>>> _______________________________________________
>>> Users mailing list
>>> Users at lists.opennebula.org
>>> http://lists.opennebula.org/listinfo.cgi/users-opennebula.org
>>>
>>>
>>>     
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