[Users] about live snapshot and qemu-kvm
Karli Sjöberg
Karli.Sjoberg at slu.se
Thu Feb 20 09:28:40 UTC 2014
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
--
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
More information about the Users
mailing list