[PATCH 0/2] builder: Choose better weights in the planner.
by Richard W.M. Jones
It started out as "this'll be just a simple fix ..."
and turned into something a bit over-engineered in the end.
Here it is anyway.
Rich.
6 years, 7 months
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Re: [Libguestfs] relaunching libguestfs with the same overlay
by Richard W.M. Jones
On Mon, Oct 02, 2017 at 11:50:42AM +0300, Maxim Kozover wrote:
> Hi Richard!
> Could you tell me, please, if there is a way to relaunch libguestfs with
> the same overlay from the last run? The documentation tells the overlay is
> removed when the handle to libguestfs is closed.
Right, the overlay is created by libguestfs itself and thrown away
when the handle is closed:
https://github.com/libguestfs/libguestfs/blob/master/lib/drives.c#L68
https://github.com/libguestfs/libguestfs/blob/master/lib/launch-direct.c#L78
However you can simply create your own overlay and use that. Run
something like:
qemu-img create -b orig_disk -f qcow2 my_overlay
and change the guestfs_add_drive_opts call to use ‘my_overlay’ and
don't use the readonly flag.
> I'm talking about read-only mode so the real disks are not touched.
The above won't touch the original disk, as long as you do _not_ run
any commands such as ‘qemu-img commit’.
Rich.
--
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming and virtualization blog: http://rwmj.wordpress.com
virt-p2v converts physical machines to virtual machines. Boot with a
live CD or over the network (PXE) and turn machines into KVM guests.
http://libguestfs.org/virt-v2v
6 years, 7 months
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