[Users] oVirt 3.3.3 RC EL6 Live Snapshot

Steve Dainard sdainard at miovision.com
Mon Feb 3 16:49:11 UTC 2014


FYI I'm running version 3.3.2, not the 3.3.3 beta.

*Steve Dainard *
IT Infrastructure Manager
Miovision <http://miovision.com/> | *Rethink Traffic*
519-513-2407 ex.250
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On Mon, Feb 3, 2014 at 11:24 AM, Dafna Ron <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 ex.250
>> 877-646-8476 (toll-free)
>>
>> *Blog <http://miovision.com/blog> | **LinkedIn <https://www.linkedin.com/
>> company/miovision-technologies>  | Twitter <https://twitter.com/miovision>
>>  | Facebook <https://www.facebook.com/miovision>*
>> ------------------------------------------------------------------------
>> Miovision Technologies Inc. | 148 Manitou Drive, Suite 101, Kitchener,
>> ON, Canada | N2C 1L3
>> This e-mail may contain information that is privileged or confidential.
>> If you are not the intended recipient, please delete the e-mail and any
>> attachments and notify us immediately.
>>
>>
>> On Sun, Feb 2, 2014 at 2:55 PM, Dafna Ron <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
>>         Miovision <http://miovision.com/> | /Rethink Traffic/
>>         519-513-2407 <tel:519-513-2407> ex.250
>>
>>         877-646-8476 <tel:877-646-8476> (toll-free)
>>
>>
>>         *Blog <http://miovision.com/blog> | **LinkedIn
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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 privileged or
>>         confidential. If you are not the intended recipient, please
>>         delete the e-mail and any attachments and notify us immediately.
>>
>>
>>         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>>> 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 Traffic/
>>         519-513-2407 <tel:519-513-2407> <tel:519-513-2407
>>         <tel:519-513-2407>> <tel:519-513-2407 <tel:519-513-2407>
>>                 <tel:519-513-2407 <tel:519-513-2407>>> ex.250
>>
>>         877-646-8476 <tel:877-646-8476> <tel:877-646-8476
>>         <tel:877-646-8476>> <tel:877-646-8476 <tel:877-646-8476>
>>
>>                 <tel:877-646-8476 <tel:877-646-8476>>> (toll-free)
>>
>>
>>                 *Blog <http://miovision.com/blog> | **LinkedIn
>>                        <https://www.linkedin.com/
>> company/miovision-technologies>  |
>>                 Twitter <https://twitter.com/miovision>  | Facebook
>>                 <https://www.facebook.com/miovision>*
>>                        ------------------------------
>> ------------------------------------------
>>
>>
>>                 Miovision Technologies Inc. | 148 Manitou Drive, Suite
>>         101,
>>                 Kitchener, ON, Canada | N2C 1L3
>>                 This e-mail may contain information that is privileged or
>>                 confidential. If you are not the intended recipient,
>>         please
>>                 delete the e-mail and any attachments and notify us
>>         immediately.
>>
>>
>>                 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>>>> 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?
>>
>>                         --
>>
>>                         Med Vänliga Hälsningar
>>
>>                                       ------------------------------
>> -------------------------------------------------
>>                         Karli Sjöberg
>>                         Swedish University of Agricultural Sciences
>>         Box 7079
>>                 (Visiting
>>                         Address
>>                         Kronåsvägen 8)
>>                         S-750 07 Uppsala, Sweden
>>                         Phone: +46-(0)18-67 15 66
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>>         karli.sjoberg at slu.se <mailto:karli.sjoberg at slu.se>
>>         <mailto:karli.sjoberg at slu.se <mailto:karli.sjoberg at slu.se>>
>>                 <mailto:karli.sjoberg at slu.se
>>         <mailto:karli.sjoberg at slu.se> <mailto:karli.sjoberg at slu.se
>>         <mailto:karli.sjoberg at slu.se>>>
>>
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>>
>>
>>             --     Dafna Ron
>>
>>
>>
>>
>>     --     Dafna Ron
>>
>>
>>
>
> --
> Dafna Ron
>
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