[fedora-virt] guestfish, libguestfs, ext4 and bad perms on /dev/kvm
Robert P. J. Day
rpjday at crashcourse.ca
Wed Apr 22 21:27:12 UTC 2009
On Wed, 22 Apr 2009, Richard W.M. Jones wrote:
> On Wed, Apr 22, 2009 at 03:20:14PM -0400, Robert P. J. Day wrote:
> > in short, ext4 filesystem support now appears to work, but
> > there's still the issue (perhaps addressed earlier) that non-root
> > users don't have access to KVM support but, from the perspective
> > of libguestfs, does that really matter?
>
> KVM makes things do a lot faster, which is always nice.
which inspires the obvious question -- is kvm *required* for any
libquestfs functionality? speed is always nice, but it's important to
know that, even if things are slow, they will still work equally well.
> You can
> do the following:
>
> # chmod o+rw /dev/kvm
>
> You have to do (just) that command as root, but after that qemu-kvm
> and guestfish itself can all be run as non-root, and will benefit
> from KVM acceleration.
or, for permanence, add the appropriate udev rule, which is what i
prefer, since it persists across reboots.
> > p.s. i could have sworn i didn't get that /dev/kvm perms error
> > yesterday. did something about that change since version 1.0.4?
>
> Yes, libguestfs changed to detect and enable KVM by default.
> Before today it wasn't using KVM at all.
gotcha, thanks.
rday
--
========================================================================
Robert P. J. Day Waterloo, Ontario, CANADA
Linux Consulting, Training and Annoying Kernel Pedantry.
Web page: http://crashcourse.ca
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