[libvirt-users] Libvirt: dynamic ownership did not work

[Jonatan Schlag]

Am Do, 4. Aug, 2016 um 11:32 schrieb Michal Privoznik 
<mprivozn at redhat.com>:
> On 03.08.2016 21:17, Jonatan Schlag wrote:
>>  Hi,
>>  I have a very strange problem with libvirt. I work on some machines 
>> with
>>  libvirt (Debian/ Arch Linux) and libvirt set the ownership of images
>>  file automatically to the qemu user / group for example on Arch 
>> Linux to
>>  nobody:kvm.
>>  So when I copy an image file with root and use I then with qemu, 
>> libvirt
>>  change the owner/ group to nobody:kvm.
>> 
>>  But I also compiled libvirt for a machine (gcc 4.9.4 glibc 2.12) 
>> and on
>>  this machine libvirt did not change the ownership of the image files
>>  which results in this error:
>> 
>>  libvirtError: internal error: process exited while connecting to
>>  monitor: able-ticketing,seamless-migration=on -device
>>  
>> qxl-vga,id=video0,ram_size=67108864,vram_size=67108864,vram64_size_mb=0,vgamem_mb=16,bus=pci.0,addr=0x2
>>  -device intel-hda,id=sound0,bus=pci.0,addr=0x4 -device
>>  hda-duplex,id=sound0-codec0,bus=sound0.0,cad=0 -chardev
>>  spicevmc,id=charredir0,name=usbredir -device
>>  usb-redir,chardev=charredir0,id=redir0 -device
>>  virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x7 -msg timestamp=on
>>  2016-08-03T18:19:47.494512Z qemu-system-x86_64: -drive
>>  
>> file=/data/hdd1/libvirt/images/test.img,format=raw,if=none,id=drive-virtio-disk0:
>>  Could not open '/data/hdd1/libvirt/images/test.img': Permission 
>> denied
> 
> Can you please share the debug logs?
> 
> http://wiki.libvirt.org/page/DebugLogs
> 
> Also, my initial suspect, before diving any deeper is that usually, 
> when
> users compile libvirt on their own, they forget to set the correct
> prefix, therefore libvirt is looking for its config files NOT under
> /etc/libvirt but /usr/local/etc/ or whatever.
> 
> BTW: is the daemon running under root?
> 
> Michal

Hi,

The daemon runs under root.

I uploaded the debug logs to:

http://people.ipfire.org/~jschlag/1363864/1_libvirtd.log

The UID of the user nobody is 99, the GID of the group kvm is 1011.

I added my configure options to the bug report.

Following the log the ownership is changed but why is the file still 
owned by root:root?

Regards Jonatan


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