Fedora 18 / Rawhide switch over to using libvirt as the back end
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Just a note [possibly more of a warning] that I'm intending to switch
the default backend in Fedora 18+ to libvirt this week. For more
information about what this means, see:
https://rwmj.wordpress.com/2012/07/23/new-in-libguestfs-use-libvirt-to-la...
Barring any bugs, the change ought to be transparent. The reasons why
we're making this change in Fedora are:
- Because in RHEL 7 this will be the default and we want to test it.
- Improved encapsulation and security through sVirt.
- Allows us to implement advanced features, especially disk
hotplugging and access to remote disks.
Note there's no change upstream. libvirt still isn't required.
Rich.
--
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
virt-p2v converts physical machines to virtual machines. Boot with a
live CD or over the network (PXE) and turn machines into Xen guests.
http://et.redhat.com/~rjones/virt-p2v
On Sun, Aug 19, 2012 at 10:05:28PM +0100, Richard W.M. Jones wrote:
Just a note [possibly more of a warning] that I'm intending to
switch
the default backend in Fedora 18+ to libvirt this week. For more
information about what this means, see:
https://rwmj.wordpress.com/2012/07/23/new-in-libguestfs-use-libvirt-to-la...
Barring any bugs, the change ought to be transparent. The reasons why
we're making this change in Fedora are:
- Because in RHEL 7 this will be the default and we want to test it.
- Improved encapsulation and security through sVirt.
- Allows us to implement advanced features, especially disk
hotplugging and access to remote disks.
Note there's no change upstream. libvirt still isn't required.
It took a while, but this should happen today.
In Rawhide: libguestfs >= 1.19.36-1.fc19
In F18: libguestfs >= 1.19.36-1.fc18
To tell if your version of libguestfs uses libvirt do:
$ guestfish get-attach-method
libvirt
(If it prints 'appliance' instead of 'libvirt', then it's using the
non-libvirt direct launch method).
There ought to be no user-visible change. If you want you can switch
back to using the direct launch method by doing:
export LIBGUESTFS_ATTACH_METHOD=appliance
If you want to change the libvirt URI used, do something like:
export LIBGUESTFS_ATTACH_METHOD=libvirt:qemu:///system
(It sounds tempting, but this won't let you use Xen etc, although it
is now plausible that someone could patch libguestfs to make that work.)
Rich.
--
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
virt-df lists disk usage of guests without needing to install any
software inside the virtual machine. Supports Linux and Windows.
http://et.redhat.com/~rjones/virt-df/
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Richard W.M. Jones