[Users] oVirt 3.3.3 RC EL6 Live Snapshot

Dafna Ron dron at redhat.com
Mon Feb 3 11:54:12 EST 2014


Can you also put the vdsm, libvirt and qemu packages?

Thanks,
Dafna


On 02/03/2014 04:49 PM, Steve Dainard wrote:
> FYI I'm running version 3.3.2, not the 3.3.3 beta.
>
> *Steve Dainard *
> IT Infrastructure Manager
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> On Mon, Feb 3, 2014 at 11:24 AM, Dafna Ron <dron at redhat.com 
> <mailto:dron at redhat.com>> wrote:
>
>     Thanks Steve.
>
>     from the logs I can see that the create snapshot succeeds and that
>     the vm is resumed.
>     the vm moves to pause as part of libvirt flows:
>
>     2014-02-02 14:41:20.872+0000: 5843: debug :
>     qemuProcessHandleStop:728 : Transitioned guest snapshot-test to
>     paused state
>     2014-02-02 14:41:30.031+0000: 5843: debug :
>     qemuProcessHandleResume:776 : Transitioned guest snapshot-test out
>     of paused into resumed state
>
>     There are bugs here but I am not sure yet if this is libvirt
>     regression or engine.
>
>     I'm adding Elad and Maor since in engine logs I can't see anything
>     calling for live snapshot (only for snapshot) - Maor, shouldn't
>     live snapshot command be logged somewhere in the logs?
>     Is it possible that engine is calling to create snapshot and not
>     create live snapshot which is why the vm pauses?
>
>     Elad, if engine is not logging live snapshot anywhere I would open
>     a bug for engine (to print that in the logs).
>     Also, there is a bug in vdsm log for sdc where the below is logged
>     as ERROR and not INFO:
>
>     Thread-23::ERROR::2014-02-02
>     09:51:19,497::sdc::137::Storage.StorageDomainCache::(_findDomain)
>     looking for unfetched domain a52938f7-2cf4-4771-acb2-0c78d14999e5
>     Thread-23::ERROR::2014-02-02
>     09:51:19,497::sdc::154::Storage.StorageDomainCache::(_findUnfetchedDomain)
>     looking for domain a52938f7-2cf4-4771-acb2-0c78d14999e5
>
>     If the engine was sending live snapshot or if there is no
>     difference in the two commands in engine side than I would open a
>     bug for libvirt for pausing the vm during live snapshot.
>
>     Dafna
>
>
>     On 02/03/2014 02:41 PM, Steve Dainard wrote:
>
>         [root at ovirt002 ~]# vdsClient -s 0 getStorageDomainInfo
>         a52938f7-2cf4-4771-acb2-0c78d14999e5
>         uuid = a52938f7-2cf4-4771-acb2-0c78d14999e5
>         pool = ['fcb89071-6cdb-4972-94d1-c9324cebf814']
>         lver = 5
>         version = 3
>         role = Master
>         remotePath = gluster-store-vip:/rep1
>         spm_id = 2
>         type = NFS
>         class = Data
>         master_ver = 1
>         name = gluster-store-rep1
>
>
>         *Steve Dainard *
>         IT Infrastructure Manager
>         Miovision <http://miovision.com/> | /Rethink Traffic/
>         519-513-2407 <tel:519-513-2407> ex.250
>         877-646-8476 <tel:877-646-8476> (toll-free)
>
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>         On Sun, Feb 2, 2014 at 2:55 PM, Dafna Ron <dron at redhat.com
>         <mailto:dron at redhat.com> <mailto:dron at redhat.com
>         <mailto:dron at redhat.com>>> wrote:
>
>             please run vdsClient -s 0 getStorageDomainInfo
>             a52938f7-2cf4-4771-acb2-0c78d14999e5
>
>             Thanks,
>
>             Dafna
>
>
>
>             On 02/02/2014 03:02 PM, Steve Dainard wrote:
>
>                 Logs attached with VM running on qemu-kvm-rhev
>         packages installed.
>
>                 *Steve Dainard *
>                 IT Infrastructure Manager
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>         519-513-2407 <tel:519-513-2407> <tel:519-513-2407
>         <tel:519-513-2407>> ex.250
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>                 On Sun, Feb 2, 2014 at 5:05 AM, Dafna Ron
>         <dron at redhat.com <mailto:dron at redhat.com>
>                 <mailto:dron at redhat.com <mailto:dron at redhat.com>>
>         <mailto:dron at redhat.com <mailto:dron at redhat.com>
>
>                 <mailto:dron at redhat.com <mailto:dron at redhat.com>>>> wrote:
>
>                     can you please upload full engine, vdsm, libvirt
>         and vm's
>                 qemu logs?
>
>
>                     On 02/02/2014 02:08 AM, Steve Dainard wrote:
>
>                         I have two CentOS 6.5 Ovirt hosts (ovirt001,
>         ovirt002)
>
>                         I've installed the applicable qemu-kvm-rhev
>         packages
>                 from this
>                         site:
>         http://www.dreyou.org/ovirt/vdsm32/Packages/ on
>                 ovirt002.
>
>                         On ovirt001 if I take a live snapshot:
>
>                         Snapshot 'test qemu-kvm' creation for VM
>                 'snapshot-test' was
>                         initiated by admin at internal.
>                         The VM is paused
>                         Failed to create live snapshot 'test qemu-kvm'
>         for VM
>                         'snapshot-test'. VM restart is recommended.
>                         Failed to complete snapshot 'test qemu-kvm'
>         creation
>                 for VM
>                         'snapshot-test'.
>                         The VM is then started, and the status for the
>         snapshot
>                         changes to OK.
>
>                         On ovirt002 (with the packages from dreyou) I
>         don't
>                 get any
>                         messages about a snapshot failing, but my VM
>         is still
>                 paused
>                         to complete the snapshot. Is there something else
>                 other than
>                         the qemu-kvm-rhev packages that would enable this
>                 functionality?
>
>                         I've looked for some information on when the
>         packages
>                 would be
>                         built as required in the CentOS repos, but I
>         don't see
>                         anything definitive.
>
>         http://lists.ovirt.org/pipermail/users/2013-December/019126.html
>                         Looks like one of the maintainers is waiting for
>                 someone to
>                         tell him what flags need to be set.
>
>                         Also, another thread here:
>         http://comments.gmane.org/gmane.comp.emulators.ovirt.arch/1618
>                         same maintainer, mentioning that he hasn't seen
>                 anything in
>                         the bug tracker.
>
>                         There is a bug here:
>         https://bugzilla.redhat.com/show_bug.cgi?id=1009100 that seems
>                         to have ended in finding a way for qemu to expose
>                 whether it
>                         supports live snapshots, rather than figuring
>         out how
>                 to get
>                         the CentOS team the info they need to build the
>                 packages with
>                         the proper flags set.
>
>                         I have bcc'd both dreyou (packaged the
>         qemu-kvm-rhev
>                 packages
>                         listed above) and Russ (CentOS maintainer
>         mentioned in the
>                         other threads) if they wish to chime in and
>         perhaps
>                         collaborate on which flags, if any, should be
>         set for the
>                         qemu-kvm builds so we can get a CentOS bug report
>                 going and
>                         hammer this out.
>
>                         Thanks everyone.
>
>                         **crosses fingers and hopes for live snapshots
>         soon**
>
>
>
>                         *Steve Dainard *
>                         IT Infrastructure Manager
>                         Miovision <http://miovision.com/> | /Rethink
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>
>                         Miovision Technologies Inc. | 148 Manitou
>         Drive, Suite
>                 101,
>                         Kitchener, ON, Canada | N2C 1L3
>                         This e-mail may contain information that is
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>                         On Fri, Jan 31, 2014 at 1:26 PM, Steve Dainard
>                         <sdainard at miovision.com
>         <mailto:sdainard at miovision.com>
>                 <mailto:sdainard at miovision.com
>         <mailto:sdainard at miovision.com>>
>         <mailto:sdainard at miovision.com <mailto:sdainard at miovision.com>
>                 <mailto:sdainard at miovision.com
>         <mailto:sdainard at miovision.com>>>
>                         <mailto:sdainard at miovision.com
>         <mailto:sdainard at miovision.com>
>                 <mailto:sdainard at miovision.com
>         <mailto:sdainard at miovision.com>>
>
>                         <mailto:sdainard at miovision.com
>         <mailto:sdainard at miovision.com>
>                 <mailto:sdainard at miovision.com
>         <mailto:sdainard at miovision.com>>>>> wrote:
>
>
>                                 How would you developers, speaking for the
>                         oVirt-community,
>                                 propose to
>                                 solve this for CentOS _now_ ?
>
>                                 I would imagine that the easiest way
>         is that
>                 you build and
>                                 host this one
>                                 package(qemu-kvm-rhev), since you´ve
>         basically
>                 already
>                         have
>                                 the source
>                                 and recipe (since you´re already
>         providing it
>                 for RHEV
>                                 anyway). Then,
>                                 once that´s in place, it´s more a
>         question of
>                 where to
>                         host the
>                                 packages, in what repository. Be it
>         your own,
>                 or some
>                         other
>                                 repo set up
>                                 for the SIG.
>
>                                 This is my view, how I as a user view
>         this issue.
>
>
>
>                             I think this is a pretty valid view.
>
>                             What would it take to get the correct qemu
>         package
>                 hosted
>                         in the
>                             ovirt repo?
>
>                                 --
>
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>                     --     Dafna Ron
>
>
>
>
>             --     Dafna Ron
>
>
>
>
>     -- 
>     Dafna Ron
>
>


-- 
Dafna Ron


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