[Users] about live snapshot and qemu-kvm
Karli Sjöberg
Karli.Sjoberg at slu.se
Fri Feb 21 06:26:55 UTC 2014
On Thu, 2014-02-20 at 17:53 +0200, Itamar Heim wrote:
> On 02/20/2014 11:28 AM, Karli Sjöberg wrote:
> > On Mon, 2014-02-17 at 09:59 -0500, Douglas Schilling Landgraf wrote:
> >> On 02/17/2014 02:00 AM, Karli Sjöberg wrote:
> >>> On Thu, 2014-02-13 at 14:42 -0500, Douglas Schilling Landgraf wrote:
> >>>> On 01/01/2014 06:24 AM, Gianluca Cecchi wrote:
> >>>>> On Wed, Jan 1, 2014 at 4:38 AM, R P Herrold wrote:
> >>>>>
> >>>>>>
> >>>>>> Out of curiousity, _what_ build environment 'flags' do you
> >>>>>> all, participating in this thread, refer to? -- the thread
> >>>>>> does not enumerate them explicitly, and one cannot expect to
> >>>>>> hit by 'indirect fire', a target not exposed
> >>>>>>
> >>>>>> With best regards, this New Year's eve
> >>>>>
> >>>>> I'm far from being a programmer, but as I went to compare build
> >>>>> environments, between
> >>>>> qemu-kvm-rhev-0.12.1.2-2.415.el6_5.3.src.rpm
> >>>>> and
> >>>>> qemu-kvm-0.12.1.2-2.415.el6_5.3.src.rpm
> >>>>> in related spec file I see
> >>>>> [g.cecchi at tekkaman SPECS]$ diff qemu-kvm.spec.upstream qemu-kvm.spec.rhev
> >>>>> 3c3
> >>>>> < %define rhev 0
> >>>>> ---
> >>>>>> %define rhev 1
> >>>>> 12928a12929
> >>>>>>>>>>>>> rhel-6.5
> >>>>>
> >>>>> and apart other probably not trivial implications, such as guest agent
> >>>>> part, I see that the "configure" command takes one extra argument in
> >>>>> base RH EL 6.5, that is
> >>>>>
> >>>>> --disable-rhev-features
> >>>>>
> >>>>> The only patch file containing this keyword is
> >>>>>
> >>>>> kvm-Block-streaming-disable-for-RHEL.patch
> >>>>>
> >>>>> and inside it there are these lines that impacts configure options and
> >>>>> related built qemu-kvm:
> >>>>>
> >>>>> --- a/configure
> >>>>> +++ b/configure
> >>>>> @@ -286,6 +286,7 @@ spice=""
> >>>>> smartcard=""
> >>>>> smartcard_nss=""
> >>>>> live_snapshots="yes"
> >>>>> +block_stream="yes"
> >>>>> usb_redir=""
> >>>>>
> >>>>> # OS specific
> >>>>> @@ -686,10 +687,22 @@ for opt do
> >>>>> ;;
> >>>>> --enable-live-snapshots) live_snapshots="yes"
> >>>>> ;;
> >>>>> + --disable-block-stream) block_stream="no"
> >>>>> + ;;
> >>>>> + --enable-block-stream) block_stream="yes"
> >>>>> + ;;
> >>>>> --disable-usb-redir) usb_redir="no"
> >>>>> ;;
> >>>>> --enable-usb-redir) usb_redir="yes"
> >>>>> ;;
> >>>>> + --disable-rhev-features)
> >>>>> + live_snapshots="no";
> >>>>> + block_stream="no";
> >>>>> + ;;
> >>>>> + --enable-rhev-features)
> >>>>> + live_snapshots="yes";
> >>>>> + block_stream="yes";
> >>>>> + ;;
> >>>>> *) echo "ERROR: unknown option $opt"; show_help="yes"
> >>>>> ;;
> >>>>> esac
> >>>>> @@ -863,8 +876,12 @@ echo " --disable-smartcard-nss disable
> >>>>> smartcard nss support"
> >>>>> echo " --enable-smartcard-nss enable smartcard nss support"
> >>>>> echo " --disable-live-snapshots disable live block device snapshot support"
> >>>>> echo " --enable-live-snapshots enable live block device snapshot support"
> >>>>> +echo " --disable-block-stream disable block streaming support"
> >>>>> +echo " --enable-block-stream enable block streaming support"
> >>>>> echo " --disable-usb-redir disable usb network redirection support"
> >>>>> echo " --enable-usb-redir enable usb network redirection support"
> >>>>> +echo " --disable-rhev-features disable RHEV-only features"
> >>>>> +echo " --enable-rhev-features enable RHEV-only features"
> >>>>> echo ""
> >>>>> echo "NOTE: The object files are built at the place where configure
> >>>>> is launched"
> >>>>> exit 1
> >>>>> @@ -2271,6 +2288,7 @@ echo "Trace backend $trace_backend"
> >>>>> echo "spice support $spice"
> >>>>> echo "nss used $smartcard_nss"
> >>>>> echo "Live snapshots $live_snapshots"
> >>>>> +echo "Block streaming $block_stream"
> >>>>> echo "xfsctl support $xfs"
> >>>>> echo "usb net redir $usb_redir"
> >>>>>
> >>>>> @@ -2526,6 +2544,10 @@ if test "$live_snapshots" = "yes" ; then
> >>>>> echo "CONFIG_LIVE_SNAPSHOTS=y" >> $config_host_mak
> >>>>> fi
> >>>>>
> >>>>> +if test "$block_stream" = "yes" ; then
> >>>>> + echo "CONFIG_BLOCK_STREAM=y" >> $config_host_mak
> >>>>> +fi
> >>>>> +
> >>>>> if test "$usb_redir" = "yes" ; then
> >>>>> echo "CONFIG_USB_REDIR=y" >> $config_host_mak
> >>>>> fi
> >>>>>
> >>>>> I don't think the rhev argument has instead implications in upstream
> >>>>> source qemu-kvm-0.12.1.2.tar.gz
> >>>>> So I think that if you want to dig more and if you have more
> >>>>> competences, you have to see the full spec file and the full patch
> >>>>> above.
> >>>>>
> >>>>> Files downloaded here:
> >>>>>
> >>>>> upstream
> >>>>> http://ftp.redhat.com/redhat/linux/enterprise/6Server/en/os/SRPMS/qemu-kvm-0.12.1.2-2.415.el6_5.3.src.rpm
> >>>>>
> >>>>> rhev
> >>>>> http://ftp.redhat.com/redhat/linux/enterprise/6Server/en/RHEV/SRPMS/qemu-kvm-rhev-0.12.1.2-2.415.el6_5.3.src.rpm
> >>>>>
> >>>>
> >>>> Just for the record, we have setup a jenkins job to rebuild qemu-kvm for
> >>>> el6 until we get it officially from centos:
> >>>> http://jenkins.ovirt.org/view/Packaging/job/qemu-kvm-rhev_create_rpms_el6/
> >>>>
> >>>> --
> >>>> Cheers
> >>>> Douglas
> >>>> _______________________________________________
> >>>> Users mailing list
> >>>> Users at ovirt.org
> >>>> http://lists.ovirt.org/mailman/listinfo/users
> >>>
> >>> I think this calls for an oldschool question/statement;
> >>>
> >>> Who da man? ... You da man! :)
> >>>
> >>> Live snapshot now just works. Haven´t verified quiesce yet though, but
> >>> looks good as far as the events in webadmin is concerned. Next to test
> >>> is live disk migration.
> >>>
> >>>
> >> Thanks a lot for the feedback :)
> >>
> >> --
> >> Cheers
> >> Douglas
> >
> > Hey,
> >
> > have gone through the logs to verify quiescence and the only thing
> > actually mentioning it comes from vdsm.log:
> > Thread-127371::DEBUG::2014-02-19
> > 14:54:15,612::BindingXMLRPC::977::vds::(wrapper) return vmSnapshot with
> > {'status': {'message': 'Done', 'code': 0}, 'quiesce': False}
> >
> > What is it saying really? That quiescing failed, or that it was
> > deliberately taken without it, or what?
> >
> > Nothing in qemu-ga.log either, even if changed to "--verbose". Like it
> > never got any calls to quiesce in the first place. The guest does have
> > the device[1] attached at least. The guest is CentOS-6.4 or 5, if that
> > matters.
> >
> > [1]: /dev/virtio-ports/org.qemu.guest_agent.0
> >
> >
>
> libvirt log?
You know what, here, see for yourself:) It´s attached.
--
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
karli.sjoberg at slu.se
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