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

[Michal Privoznik]

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