[Users] Online snapshot

[Dave Allan]

On Thu, Jun 28, 2012 at 06:34:25AM -0400, Itamar Heim wrote:
> On 06/28/2012 04:40 AM, Winfried de Heiden wrote:
> >Hi all,
> >
> >It seems live snapshot is available in the Fedora 17 qemu-kvm. On my
> >laptop with kvm, virt-manager, libvirt, virsh etc. I created a virtual
> >machine and tried  to make a live snapshot:
> >
> >virsh -c qemu:///system
> >Welcome to virsh, the virtualization interactive terminal.
> >
> >Type:  'help' for help with commands
> >        'quit' to quit
> >
> >virsh # list
> >  Id    Name                           State
> >----------------------------------------------------
> >  1     RHEL55_NTP                     running
> >
> >virsh # snapshot-create RHEL55_NTP
> >Domain snapshot 1340871802 created
> >virsh # snapshot-list RHEL55_NTP
> >  Name                 Creation Time             State
> >------------------------------------------------------------
> >  1340871724           2012-06-28 10:22:04 +0200 running
> >  1340871802           2012-06-28 10:23:22 +0200 running
> >
> >Both my laptop and the Virtio vdsm machine are using the same package:
> >
> >[root at kvm ~]# rpm -qf `which qemu-kvm`
> >qemu-system-x86-1.0-17.fc17.x86_64
> >
> >[wdh at laptop-winfried ~]$ rpm -qf `which qemu-kvm`
> >qemu-system-x86-1.0-17.fc17.x86_64
> 
> dave - who can help us elaborate on this libvirt error:
> reuse is not supported with
> this QEMU binary

Eric, can you answer that?

Thanks,
Dave

> Thanks,
>    Itamar
> 
> >
> >
> >
> >
> >
> >Op 28-06-12 03:29, Itamar Heim schreef:
> >>On 06/27/2012 10:47 AM, Winfried de Heiden wrote:
> >>>Hi all,
> >>>
> >>>
> >>>Trying to create an online (vm still running) fails; attachted is de
> >>>vdsm logfile trying to create a live snapshot.
> >>>
> >>>Some details:
> >>>
> >>>hypervisor = Fedora 17 + vdsm, all the latest updates etc.
> >>>
> >>>[root at kvm vdsm]# rpm -qi vdsm
> >>>Name        : vdsm
> >>>Version     : 4.10.0
> >>>Release     : 2.fc17
> >>>Architecture: x86_64
> >>>Install Date: wo 27 jun 2012 12:08:20 CEST
> >>>Group       : Applications/System
> >>>Size        : 2425943
> >>>License     : GPLv2+
> >>>Signature   : (none)
> >>>Source RPM  : vdsm-4.10.0-2.fc17.src.rpm
> >>>Build Date  : vr 22 jun 2012 12:52:54 CEST
> >>>Build Host  : x86-11.phx2.fedoraproject.org
> >>>Relocations : (not relocatable)
> >>>Packager    : Fedora Project
> >>>Vendor      : Fedora Project
> >>>URL         : http://www.ovirt.org/wiki/Vdsm
> >>>Summary     : Virtual Desktop Server Manager
> >>>Description :
> >>>The VDSM service is required by a Virtualization Manager to manage the
> >>>Linux hosts. VDSM manages and monitors the host's storage, memory and
> >>>networks as well as virtual machine creation, other host administration
> >>>tasks, statistics gathering, and log collection.
> >>>
> >>>BTL, sanlock is disabled in qemu.conf (#lock_manager="sanlock"), I
> >>>cannot install a vm when it's enabled. Is that related?
> >>
> >>this is the relevant error coming from libvirt.
> >>maybe fedora 17 qemu-kvm does not have live snapshot support?
> >>
> >>Thread-306::ERROR::2012-06-27
> >>12:46:40,178::libvirtvm::1782::vm.Vm::(snapshot)
> >>vmId=`ef978066-09c8-40aa-8e0b-4accfacc15bd`::Unable to take snapshot
> >>Traceback (most recent call last):
> >>   File "/usr/share/vdsm/libvirtvm.py", line 1780, in snapshot
> >>     libvirt.VIR_DOMAIN_SNAPSHOT_CREATE_REUSE_EXT))
> >>   File "/usr/share/vdsm/libvirtvm.py", line 491, in f
> >>     ret = attr(*args, **kwargs)
> >>   File "/usr/lib/python2.7/site-packages/vdsm/libvirtconnection.py",
> >>line 82, in wrapper
> >>     ret = f(*args, **kwargs)
> >>   File "/usr/lib64/python2.7/site-packages/libvirt.py", line 1443, in
> >>snapshotCreateXML
> >>     if ret is None:raise libvirtError('virDomainSnapshotCreateXML()
> >>failed', dom=self)
> >>libvirtError: unsupported configuration: reuse is not supported with
> >>this QEMU binary
> >
> >
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