Simple way to activate live merge in FC20 cluster

Thursday, 20 November 2014

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Hi Bob,=0A=
=0A=
if your are on a cluster with FC20 hypervisor nodes wthout virt-preview =0A=
(like we run it with qemu 1.6.2) the simplest way to get live merge feature=
s =0A=
should be - beware NOT FULLY TESTED!=0A=
=0A=
1) choose a single host (we only need a single one if we think about the re=
quired setup)=0A=
2) Install libvirt from virt-preview repos. DON'T UPDATE QEMU AS YOU BREAK =
LIVE MIGRATION!=0A=
3) migrate VMs you want to live merge to the host=0A=
4) do the live merge=0A=
5) migrate VMs back to original host=0A=
=0A=
A quick test revealed:=0A=
=0A=
# systemctl stop vdsmd=0A=
# systemctl stop libvirtd=0A=
# cd /etc/yum.repos.d=0A=
# wget http:/wget http://fedorapeople.org/groups/virt/virt-preview/fedora-v=
irt-preview.repo=0A=
# yum update libvirt=0A=
...=0A=
# systemctl start libvirtd=0A=
# systemctl start vdsmd=0A=
# =0A=
# vdsClient -s 0 getVdsCaps | grep -i merge=0A=
---> liveMerge =3D 'true'=0A=
=0A=
Best regards.=0A=
=0A=
Markus=0A=
________________________________________=0A=
Von: Bob Doolittle [bob(a)doolittle.us.com]=0A=
Gesendet: Donnerstag, 20. November 2014 16:49=0A=
An: Markus Stockhausen=0A=
Cc: s k; users(a)ovirt.org; Daniel Helgenberger; Coffee Chou=0A=
Betreff: Re: [ovirt-users] Live Merge Functionality disabled on CentOS 6.6 =
Node and oVirt 3.5.0=0A=
=0A=
On 11/20/2014 10:32 AM, Markus Stockhausen wrote:=0A=
...
 Iirc you simply need libvirt 1.2.9=0A= =0A=
Thanks!=0A=
=0A=
Would you know how one could track to see if there is a plan for e,g.=0A=
Fedora 20 to include that version at some point? I suspect every distro=0A=
is different. F20 at this point includes 1.1.3. I'd like to know if I'll=0A=
have to upgrade to Fedora 21 in order to get this functionality, as this=0A=
will require some planning on my part.=0A=
=0A=
Thanks again,=0A=
    Bob=0A=
=0A=
=0A=
...
=0A=
 Am 20.11.2014 16:20 schrieb Bob Doolittle <bob@doolittle.us.com>:=0A=
=0A=
     Are there any bugs related to the changes in question that we can tra= ck=0A=
...
     so we know when the changes are reflected in our distros of
interest?= =0A=
...
=0A=
     Thanks,=0A=
         Bob=0A=
=0A=
     On 11/20/2014 03:51 AM, s k wrote:=0A=
     > Hi,=0A=
     >=0A=
     >=0A=
     > Live snapshot indeed works, only live merge is not working. I guess= 
we=0A=
...
     > will have to wait until is available on CentOS.=0A=
     >=0A=
     > Thanks!=0A=
     >=0A=
     > Sokratis=0A=
     >=0A=
     >=0A=
     >=0A=
     ---------------------------------------------------------------------= ---=0A=
...
     > Date: Thu, 20 Nov 2014 09:49:40 +0800=0A=
     > Subject: Re: [ovirt-users] Live Merge Functionality disabled on Cen=
tOS=0A=
...
     > 6.6 Node and oVirt 3.5.0=0A=
     > From: coffee.zyr(a)gmail.com=0A=
     > To: daniel.helgenberger(a)m-box.de=0A=
     > CC: sokratis123k(a)outlook.com; users(a)ovirt.org=0A=
     >=0A=
     > Hi,=0A=
     >     as i know, live merge is only available from the versions in th=
e=0A=
...
     > fedora virt-preview repo. please see[1]=0A=
     >=0A=
     > [1] http://www.ovirt.org/Features/Live_Merge#Current_status=0A=
     >=0A=
     > 2014-11-20 2:11 GMT+08:00 Daniel Helgenberger=0A=
     > <daniel.helgenberger(a)m-box.de <mailto:daniel.helgenberger@m-box.de>=
:=0A=
     >=0A=
     >     On 19.11.2014 14:06, s k wrote:=0A=
     >     > Hello,=0A=
     >     >=0A=
     >     > I performed a full yum upgrade on a CentOS 6.5 Node which was=
=0A=
...
     >     upgraded to 6.6=0A=
     >     > and I currently the following RPM versions are installed:=0A=
     >     >=0A=
     >     > [root@node01 ~]# uname -a=0A=
     >     > Linux node01 2.6.32-504.1.3.el6.x86_64 #1 SMP Tue Nov 11=0A=
     17:57:25=0A=
     >     UTC 2014=0A=
     >     > x86_64 x86_64 x86_64 GNU/Linux=0A=
     >     > [root@node01 ~]# rpm -qa |grep libvirt=0A=
     >     > libvirt-python-0.10.2-46.el6_6.1.x86_64=0A=
     >     > libvirt-client-0.10.2-46.el6_6.1.x86_64=0A=
     >     > libvirt-lock-sanlock-0.10.2-46.el6_6.1.x86_64=0A=
     >     > libvirt-0.10.2-46.el6_6.1.x86_64=0A=
     >     > [root@node01 ~]#=0A=
     >     > [root@node01 ~]# rpm -qa |grep kvm=0A=
     >     > qemu-kvm-rhev-debuginfo-0.12.1.2-2.415.el6_5.14.x86_64=0A=
     >     > qemu-kvm-rhev-tools-0.12.1.2-2.415.el6_5.14.x86_64=0A=
     >     > qemu-kvm-rhev-0.12.1.2-2.415.el6_5.14.x86_64=0A=
     >     > [root@node01 ~]# rpm -qa |grep qemu=0A=
     >     > gpxe-roms-qemu-0.9.7-6.12.el6.noarch=0A=
     >     > qemu-kvm-rhev-debuginfo-0.12.1.2-2.415.el6_5.14.x86_64=0A=
     >     > qemu-img-rhev-0.12.1.2-2.415.el6_5.14.x86_64=0A=
     >     > qemu-kvm-rhev-tools-0.12.1.2-2.415.el6_5.14.x86_64=0A=
     >     > qemu-kvm-rhev-0.12.1.2-2.415.el6_5.14.x86_64=0A=
     >     > [root@node01 ~]# rpm -qa |grep vdsm=0A=
     >     > vdsm-jsonrpc-4.16.7-1.gitdb83943.el6.noarch=0A=
     >     > vdsm-python-zombiereaper-4.16.7-1.gitdb83943.el6.noarch=0A=
     >     > vdsm-yajsonrpc-4.16.7-1.gitdb83943.el6.noarch=0A=
     >     > vdsm-xmlrpc-4.16.7-1.gitdb83943.el6.noarch=0A=
     >     > vdsm-4.16.7-1.gitdb83943.el6.x86_64=0A=
     >     > vdsm-python-4.16.7-1.gitdb83943.el6.noarch=0A=
     >     > vdsm-cli-4.16.7-1.gitdb83943.el6.noarch=0A=
     >     >=0A=
     >     > The host reports that  Live Snapsnot Support is Active on the=
=0A=
...
     >     General Tab but=0A=
     >     > I'm unable to delete a snapshot.=0A=
     >     >=0A=
     >     > Any ideas?=0A=
     >     Hm could it be you mix up live snapshot and live merge? Live=0A=
     snapshot=0A=
     >     works since 3.4.3 quite will. Live merge however is still=0A=
     unsupported as=0A=
     >     I think it requires some quite new stuff from libvirt. It will= =0A=
...
     >     eventually work on EL7 [1].=0A=
     >=0A=
     >     [1] https://bugzilla.redhat.com/show_bug.cgi?id=3D1062142=0A=
     >     >=0A=
     >     > Thank you,=0A=
     >     >=0A=
     >     > Sokratis=0A=
     >     >=0A=
     >=0A=
     >     --=0A=
     >     Daniel Helgenberger=0A=
     >     m box bewegtbild GmbH=0A=
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