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@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

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@kvm ~]# rpm -qf `which qemu-kvm` >qemu-system-x86-1.0-17.fc17.x86_64 > >[wdh@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

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@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 > > >_______________________________________________ >Users mailing list >Users(a)ovirt.org >http://lists.ovirt.org/mailman/listinfo/users

On 06/28/2012 07:07 AM, Dave Allan wrote: > 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 # snapshot-create RHEL55_NTP >>> Domain snapshot 1340871802 created That's a system-checkpoint snapshot, because you didn't use --disk-only. When you say 'live snapshot' were you intending the fast operation of just a disk snapshot (via the 'transaction' or 'blockdev-snapshot-sync' monitor command) or the slow operation of a checkpoint (via the 'savevm' monitor command)? >>> [root@kvm ~]# rpm -qf `which qemu-kvm` >>> qemu-system-x86-1.0-17.fc17.x86_64 >>> >>> [wdh@laptop-winfried ~]$ rpm -qf `which qemu-kvm` >>> qemu-system-x86-1.0-17.fc17.x86_64 This qemu does not support the 'transaction' monitor command, so libvirt has to fall back to the non-atomic 'blockdev-snapshot-sync', or else give up because of missing functionality. >> >> dave - who can help us elaborate on this libvirt error: >> reuse is not supported with >> this QEMU binary >>>> >>>> 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)) OK, so this is a case of VDSM driving a different use of the API than what you did with your virsh command line. VDSM is attempting to do the equivalent of 'virsh snapshot-create --disk-only --reuse-ext', but because your qemu doesn't support the 'transaction' command, libvirt can't make qemu do what VDSM wants. Basically, the 'blockdev-snapshot-sync' command in qemu 1.0 lacks the ability to reuse qcow2 metadata already present in the file pre-created by VDSM; this wasn't added until the 'transaction' command of qemu 1.1.

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@kvm ~]# rpm -qf `which qemu-kvm` > qemu-system-x86-1.0-17.fc17.x86_64 > > [wdh@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 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@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 > > > _______________________________________________ > Users mailing list > Users(a)ovirt.org > http://lists.ovirt.org/mailman/listinfo/users _______________________________________________ Users mailing list Users(a)ovirt.org http://lists.ovirt.org/mailman/listinfo/users