On Mon, Apr 11, 2016 at 12:01:08PM +0300, Michael Ravits wrote: > Hi, > > My use case involves creating duplicates of saved virtual machines. While I realize you want to trivially clone VMs with some state at random point in time, you might want to look into `virt-builder` about cloning VMs. It has some sensible advice: http://libguestfs.org/virt-builder.1.html#clones Using `virt-builder` to clone images, will 'sysprep' the images, which will ensure that (a) each VM copy gets a fresh pair of SSH host keys; (b) a new random seed; (c) all security/sensitive information is removed; (d) log files are cleaned (in the below URL, look up the string "logfiles *" to see what all it removes), and much more. Take a look here for what all it does: http://libguestfs.org/virt-sysprep.1.html#operations http://libguestfs.org/virt-sysprep.1.html#security > Tried with virt-manager and with virsh but so far it seems like this > case is not supported by these tools. Does anyone know how I could > achieve the above? With 'virsh', you _can_ save the live disk and memory state: $ virsh snapshot-create-as \ --domain myvm snap1 \ --diskspec vda,file=./disk-snap.qcow2,snapshot=external \ --memspec file=./mem-snap.qcow2,snapshot=external \ --atomic -- /kashyap

-----Oorspronkelijk bericht----- Van: libvirt-users-bounces(a)redhat.com [mailto:libvirt-users- bounces(a)redhat.com] Namens Kashyap Chamarthy Verzonden: woensdag 13 april 2016 14:12 Aan: Michael Ravits CC: libvirt-users(a)redhat.com Onderwerp: Re: [libvirt-users] Clone VM with saved state On Tue, Apr 12, 2016 at 03:15:16PM +0300, Michael Ravits wrote: > Hi Kashyap, > > Thanks for your answer! > > Unfortunately my use case requires cloning the exact memory state, so > I won't be able to use virt-sysprep. > But the snapshot command looks like something I could use. > Could you suggest how to proceed and create/start a new vm from that > snapshot? Afraid, I don't know of a trivial way to create a new VM from the kind of snapshot ('external system checkpoint' snapshot) where you have two files: disk state, and memory state. You might have to play around a bit and construct a script + XML definition file that allows you to create a new VM from these files. Maybe Eric Blake has better suggestions.

If you _just_ want to save memory state, then you can try `virsh save` and `virsh restore` (read more about them here: `man virsh`). [...] > > With 'virsh', you _can_ save the live disk and memory state: > > > > $ virsh snapshot-create-as \ > > --domain myvm snap1 \ > > --diskspec vda,file=./disk-snap.qcow2,snapshot=external \ > > --memspec file=./mem-snap.qcow2,snapshot=external \ > > --atomic > > > > > > -- > > /kashyap > > -- /kashyap _______________________________________________ libvirt-users mailing list libvirt-users(a)redhat.com https://www.redhat.com/mailman/listinfo/libvirt-users