[ovirt-users] Simple way to activate live merge in FC20 cluster

Bob Doolittle bob at doolittle.us.com
Thu Nov 20 18:38:37 UTC 2014


Thanks Markus, but I have a single, self-hosted node, so cannot migrate VMs.

Is it your assumption that F20 will never be updated with libvirt 1.2.9?

If that's the case, my best course (in a month or so when F21 is
released) is probably to export all my VMs, install F21,
reinstall/reconfigure oVirt, import the old Export Domain, and then
import my VMs again.

-Bob

On 11/20/2014 01:20 PM, Markus Stockhausen wrote:
> Hi Bob,
> 
> if your are on a cluster with FC20 hypervisor nodes wthout virt-preview 
> (like we run it with qemu 1.6.2) the simplest way to get live merge features 
> should be - beware NOT FULLY TESTED!
> 
> 1) choose a single host (we only need a single one if we think about the required setup)
> 2) Install libvirt from virt-preview repos. DON'T UPDATE QEMU AS YOU BREAK LIVE MIGRATION!
> 3) migrate VMs you want to live merge to the host
> 4) do the live merge
> 5) migrate VMs back to original host
> 
> A quick test revealed:
> 
> # systemctl stop vdsmd
> # systemctl stop libvirtd
> # cd /etc/yum.repos.d
> # wget http:/wget http://fedorapeople.org/groups/virt/virt-preview/fedora-virt-preview.repo
> # yum update libvirt
> ...
> # systemctl start libvirtd
> # systemctl start vdsmd
> # 
> # vdsClient -s 0 getVdsCaps | grep -i merge
> ---> liveMerge = 'true'
> 
> Best regards.
> 
> Markus
> ________________________________________
> Von: Bob Doolittle [bob at doolittle.us.com]
> Gesendet: Donnerstag, 20. November 2014 16:49
> An: Markus Stockhausen
> Cc: s k; users at ovirt.org; Daniel Helgenberger; Coffee Chou
> Betreff: Re: [ovirt-users] Live Merge Functionality disabled on CentOS 6.6 Node and oVirt 3.5.0
> 
> On 11/20/2014 10:32 AM, Markus Stockhausen wrote:
>> Iirc you simply need libvirt 1.2.9
> 
> Thanks!
> 
> Would you know how one could track to see if there is a plan for e,g.
> Fedora 20 to include that version at some point? I suspect every distro
> is different. F20 at this point includes 1.1.3. I'd like to know if I'll
> have to upgrade to Fedora 21 in order to get this functionality, as this
> will require some planning on my part.
> 
> Thanks again,
>     Bob
> 
> 
>>
>> Am 20.11.2014 16:20 schrieb Bob Doolittle <bob at doolittle.us.com>:
>>
>>     Are there any bugs related to the changes in question that we can track
>>     so we know when the changes are reflected in our distros of interest?
>>
>>     Thanks,
>>         Bob
>>
>>     On 11/20/2014 03:51 AM, s k wrote:
>>     > Hi,
>>     >
>>     >
>>     > Live snapshot indeed works, only live merge is not working. I guess we
>>     > will have to wait until is available on CentOS.
>>     >
>>     > Thanks!
>>     >
>>     > Sokratis
>>     >
>>     >
>>     >
>>     ------------------------------------------------------------------------
>>     > Date: Thu, 20 Nov 2014 09:49:40 +0800
>>     > Subject: Re: [ovirt-users] Live Merge Functionality disabled on CentOS
>>     > 6.6 Node and oVirt 3.5.0
>>     > From: coffee.zyr at gmail.com
>>     > To: daniel.helgenberger at m-box.de
>>     > CC: sokratis123k at outlook.com; users at ovirt.org
>>     >
>>     > Hi,
>>     >     as i know, live merge is only available from the versions in the
>>     > fedora virt-preview repo. please see[1]
>>     >
>>     > [1] http://www.ovirt.org/Features/Live_Merge#Current_status
>>     >
>>     > 2014-11-20 2:11 GMT+08:00 Daniel Helgenberger
>>     > <daniel.helgenberger at m-box.de <mailto:daniel.helgenberger at m-box.de>>:
>>     >
>>     >     On 19.11.2014 14:06, s k wrote:
>>     >     > Hello,
>>     >     >
>>     >     > I performed a full yum upgrade on a CentOS 6.5 Node which was
>>     >     upgraded to 6.6
>>     >     > and I currently the following RPM versions are installed:
>>     >     >
>>     >     > [root at node01 ~]# uname -a
>>     >     > Linux node01 2.6.32-504.1.3.el6.x86_64 #1 SMP Tue Nov 11
>>     17:57:25
>>     >     UTC 2014
>>     >     > x86_64 x86_64 x86_64 GNU/Linux
>>     >     > [root at node01 ~]# rpm -qa |grep libvirt
>>     >     > libvirt-python-0.10.2-46.el6_6.1.x86_64
>>     >     > libvirt-client-0.10.2-46.el6_6.1.x86_64
>>     >     > libvirt-lock-sanlock-0.10.2-46.el6_6.1.x86_64
>>     >     > libvirt-0.10.2-46.el6_6.1.x86_64
>>     >     > [root at node01 ~]#
>>     >     > [root at node01 ~]# rpm -qa |grep kvm
>>     >     > qemu-kvm-rhev-debuginfo-0.12.1.2-2.415.el6_5.14.x86_64
>>     >     > qemu-kvm-rhev-tools-0.12.1.2-2.415.el6_5.14.x86_64
>>     >     > qemu-kvm-rhev-0.12.1.2-2.415.el6_5.14.x86_64
>>     >     > [root at node01 ~]# rpm -qa |grep qemu
>>     >     > gpxe-roms-qemu-0.9.7-6.12.el6.noarch
>>     >     > qemu-kvm-rhev-debuginfo-0.12.1.2-2.415.el6_5.14.x86_64
>>     >     > qemu-img-rhev-0.12.1.2-2.415.el6_5.14.x86_64
>>     >     > qemu-kvm-rhev-tools-0.12.1.2-2.415.el6_5.14.x86_64
>>     >     > qemu-kvm-rhev-0.12.1.2-2.415.el6_5.14.x86_64
>>     >     > [root at node01 ~]# rpm -qa |grep vdsm
>>     >     > vdsm-jsonrpc-4.16.7-1.gitdb83943.el6.noarch
>>     >     > vdsm-python-zombiereaper-4.16.7-1.gitdb83943.el6.noarch
>>     >     > vdsm-yajsonrpc-4.16.7-1.gitdb83943.el6.noarch
>>     >     > vdsm-xmlrpc-4.16.7-1.gitdb83943.el6.noarch
>>     >     > vdsm-4.16.7-1.gitdb83943.el6.x86_64
>>     >     > vdsm-python-4.16.7-1.gitdb83943.el6.noarch
>>     >     > vdsm-cli-4.16.7-1.gitdb83943.el6.noarch
>>     >     >
>>     >     > The host reports that  Live Snapsnot Support is Active on the
>>     >     General Tab but
>>     >     > I'm unable to delete a snapshot.
>>     >     >
>>     >     > Any ideas?
>>     >     Hm could it be you mix up live snapshot and live merge? Live
>>     snapshot
>>     >     works since 3.4.3 quite will. Live merge however is still
>>     unsupported as
>>     >     I think it requires some quite new stuff from libvirt. It will
>>     >     eventually work on EL7 [1].
>>     >
>>     >     [1] https://bugzilla.redhat.com/show_bug.cgi?id=1062142
>>     >     >
>>     >     > Thank you,
>>     >     >
>>     >     > Sokratis
>>     >     >
>>     >
>>     >     --
>>     >     Daniel Helgenberger
>>     >     m box bewegtbild GmbH
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