[Bug 691590] Re: libvirt restore exactly the old ownership of images

[Christian Ehrhardt ]

Hi Soren,
yeah I've seen your old youtube video on what is new in virtualization for Ubuntu since the name felt known :-).

The reason to not upload immediately is that I'd want to see if there are any other bad effects of attr being enabled that we might miss.
I'd want to see if e.g. migrations on disk images on shared storage run into trouble or something like that. To do so I'd run a bunch of regression tests in addition to what comes to my mind for this case in particular. Those tests need quite some time and allocation of systems - therefore they are most effective if coupled with a bunch of other big changes where the tests will cover "more new code".

In addition I'm away for quite some time in July, so if I break things
with an upload now I'm not around to clean up my mess.

And while the bug feels bad, it was open so long attracting only so few
people/reports that while it feels important for the two of us now it
might overall be not too urgent to squeeze it in asap.

I hope that explains why I have postponed the change to when I get to
merge a newer libvirt for groovy anyway.

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https://bugs.launchpad.net/bugs/691590

Title:
  libvirt restore exactly the old ownership of images

Status in libvirt:
  Fix Released
Status in libvirt package in Ubuntu:
  In Progress

Bug description:
  Natty (and it was also the same on Maverick, IIRC).

  When you assign an ISO to a VM, libvirt will take over onwership of
  the ISO. This creates problems if the ISO is updated.

  For example, I am daily updating the Natty server ISOs, and running
  tests on them via KVM (all automated). The ISO updates will fail
  because libvirt chowns them.

  I see no reason for this: libvirt only needs the ISO as input.

  WORKAROUND:
    edit /etc/libvirt/qemu.conf, change 'dynamic_ownership = 0', restart qemu/KVM.

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