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Virt SIG Meeting minutes
by Lars Kurth 13 Jan '15

13 Jan '15

See * http://centos.org/minutes/2015/january/centos-devel.2015-01-13-14.06.html * http://centos.org/minutes/2015/january/centos-devel.2015-01-13-14.06.log.ht…

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Reminder: CentOS Virt SIG meeting on IRC tomorrow (13 Jan), 2pm GMT
by George Dunlap 12 Jan '15

12 Jan '15

Hey all, Just a reminder that we'll be resuming our bi-weekly Virt SIG meeting on IRC tomorrow at 2pm. Basic agenda: * Xen update * Docker update * oVirt update * FOSDEM? * Any other business Please let me know if you have any other topics you'd like to bring up. -George

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Libvirt save problem
by Cristian Del Carlo 12 Jan '15

12 Jan '15

Hi list, i use a centos 7 as virtual host with two guests with windows 2012 standard ( as storage i use RAW files). My problem is that sometime during the bakup my server reboot without leaving information in the log files ( /var/log/messages ). The backup does this steps: 1) Save the state of the virtual guest ( with the command "virsh save " ) 2) Make a snapshot of the filesystem ( with lvm2 ) 3) Make a backup of the snapshot I found that the problem is related with the save of the state, without saving the state i have no problem. Could you help me? Thanks. [root@kvm1 ~]# rpm -aq | grep libvirt libvirt-daemon-driver-interface-1.1.1-29.el7_0.3.x86_64 libvirt-daemon-config-nwfilter-1.1.1-29.el7_0.3.x86_64 libvirt-daemon-driver-storage-1.1.1-29.el7_0.3.x86_64 libvirt-daemon-driver-qemu-1.1.1-29.el7_0.3.x86_64 libvirt-daemon-1.1.1-29.el7_0.3.x86_64 libvirt-daemon-driver-secret-1.1.1-29.el7_0.3.x86_64 libvirt-daemon-driver-network-1.1.1-29.el7_0.3.x86_64 libvirt-client-1.1.1-29.el7_0.3.x86_64 libvirt-daemon-driver-nwfilter-1.1.1-29.el7_0.3.x86_64 libvirt-1.1.1-29.el7_0.3.x86_64 libvirt-daemon-driver-nodedev-1.1.1-29.el7_0.3.x86_64 libvirt-daemon-config-network-1.1.1-29.el7_0.3.x86_64 libvirt-daemon-driver-lxc-1.1.1-29.el7_0.3.x86_64 Kernel 3.10.0-123.8.1.el7.x86_64 #1 SMP. [root@kvm1 ~]# rpm -aq | grep qemu libvirt-daemon-driver-qemu-1.1.1-29.el7_0.3.x86_64 qemu-kvm-1.5.3-60.el7_0.7.0.1.x86_64 qemu-system-x86-2.0.0-1.el7.1.x86_64 ipxe-roms-qemu-20130517-5.gitc4bce43.el7.noarch qemu-img-1.5.3-60.el7_0.7.0.1.x86_64 qemu-common-2.0.0-1.el7.1.x86_64 qemu-kvm-common-1.5.3-60.el7_0.7.0.1.x86_64 [root@kvm1 ~]# rpm -aq | grep lvm2 lvm2-2.02.105-14.el7.x86_64 lvm2-libs-2.02.105-14.el7.x86_64 -- -------------------------------------------------------- Cristian Del Carlo Il testo e gli eventuali documenti trasmessi contengono informazioni riservate al destinatario indicato. La seguente e-mail è confidenziale e la sua riservatezza è tutelata legalmente dal Decreto Legislativo 196 del 30/06/2003 (Codice di tutela della privacy). La lettura, copia o altro uso non autorizzato o qualsiasi altra azione derivante dalla conoscenza di queste informazioni sono rigorosamente vietate. Qualora abbiate ricevuto questo documento per errore siete cortesemente pregati di darne immediata comunicazione al mittente e di provvedere, immediatamente, alla sua distruzione. --------------------------------------------------------

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CPU Hot Plug/Unplug with KVM on CentOS
by roy simkes 08 Jan '15

08 Jan '15

Hello, I'm trying to plug and unplug cpus with a host CentOS 7 on a guest machine with CentOS too. I have created the guest with virt-install command, modified my domxml to have maximum 4 vcpus and updated the current cpu to 2. After that I open the virsh console, and used command setvcpus to add/remove cpus. I was able to increase the vcpu count until 4 but can't increase it after 4 as it exceeds maximum vcpu count. However when I want to remove vcpus, again by using setvcpus command, I noticed that it's not possbile. I have looked around and found a changelog related to CentOS 6.5 where unplugging was supported. To check that, I have installed CentOS 6.5 on the host machine and tried again and noticed that it worked. I used the commands as this: virsh -c qemu:///system setvcpus myguest 3 setvcpus myguest 2 (Caused an error on CentOS 7 but not on 6.5) The excerpt from my domxml related to the cpus is like this: <vcpu placement='static' current="2">4</vcpu> I can again see those cpus being plugged and unplugged using the /proc/cpuinfo I have looked around a little bit but I was unable to find why this happened. Can you direct me to the right place to look or tell me if this is a bug or not? Or is it something related to the libvirt and not kvm/qemu? Thanks roy

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Joining the SIG - oVirt project
by Sandro Bonazzola 08 Jan '15

08 Jan '15

Hi, I just joined the CentOS-virt call yesterday for the first time and it was a pleasure to meet you there. My name is Sandro Bonazzola[1] and I'm a member of the integration team and the release engineering manager for oVirt project[2]. oVirt is an open source alternative to VMware vSphere, and provides an excellent KVM management interface for multi-node virtualization. On each release we provide packages for Fedora and CentOS 6 and starting with the upcoming release 3.5.1 we're going to provide packages also for CentOS 7. We started looking at the CentOS virt SIG a few months ago and we finally decided to join. With me there is also David Caro (in CC), he's member of the oVirt infra and CI team and he's also in oVirt release engineering team. As discussed in the call today, a first thing we're looking at is getting live snapshot capability in qemu-kvm package provided within CentOS. Currently we're delivering qemu-kvm-rhev within oVirt repositories, taking the src.rpm from CentOS repo and rebuilding it with the rhev flag for enabling the capability. Another interesting point for us is providing a live image with oVirt pre-installed. We're now composing oVirt Live[3] iso images using CentOS 6 packages as base also if original kickstart files came from Scientific Linux. We would like to make it fully CentOS based and hopefully move to CentOS 7. We also provide oVirt Node[4] which is also based on CentOS 6 and is a small, robust operating system image using minimal resources while providing the ability to control virtual machines running upon it. Both the spins can take advantage of having packages like qemu-kvm-rhev or in some cases glusterfs or libvirt or other dependencies updates as well as other projects that may rely on the CentOS virt SIG. On the other hand, having latest oVirt RPMs within CentOS will allow CentOS and oVirt users to work with a single repository. We're now looking at CentOS site gathering info about the SIG, how to join and how to contribute. [1] https://fedoraproject.org/wiki/User:Sbonazzo [2] http://www.ovirt.org [3] http://www.ovirt.org/OVirt_Live [4] http://www.ovirt.org/Node Thanks, -- Sandro Bonazzola Better technology. Faster innovation. Powered by community collaboration. See how it works at redhat.com

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CentOS 6 Xen 4.4.1 packages available on virt6-testing
by George Dunlap 07 Jan '15

07 Jan '15

At long last, I've got some beta CentOS 6 4.4.1 packages up on the CBS. Major updates include: * Update to Xen 4.4.1. Also includes all XSAs through 114 * Update to latest blktap 2.5 * Updated libvirt packages (1.2.10), which work well with libxl To use, add the following to a file in /etc/yum.repos.d: [virt-testing] name=CentOS-$releasever - virt-testing baseurl=http://cbs.centos.org/repos/virt6-testing/$basearch/os/ gpgcheck=0 enabled=1 Notes: * git repo with all the changes to xen can be found here: https://github.com/gwd/sig-virt-xen out/virt6/update-4.4.1-4 * The signing infrastructure is not in place, so the binaries are not signed. * xend is now disabled by default. You can enable it by running chkconfig. xend has been removed from the tree entirely in Xen 4.5, so this should (hopefully) serve as a "wake-up-call" for people to begin the transition over to xend. * A lot have things have changed -- please to test this so we can get a good idea what may have broken. -George

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Re: [CentOS-virt] Xen4CentOS python-virtinst version issue, blktap2 problem
by Johnny Hughes 07 Jan '15

07 Jan '15

On 01/06/2015 08:38 AM, Philippe-A. Lemelin wrote: > > > On 15-01-06 09:21 AM, George Dunlap wrote: >> On Tue, Jan 6, 2015 at 11:42 AM, Pasi Kärkkäinen <pasik(a)iki.fi> wrote: >>> Hello, >>> >>> It seems currently when you "yum update" CentOS 6.6 Xen host you end >>> up getting python-virtinst from c6 base repo: >>> python-virtinst-0.600.0-24.el6.noarch >>> >>> and not from Xen4CentOS repo, because the version there is "older": >>> 0.600.0-19. >>> >>> .. which means the centos/xen-specific patch in python-virtinst is >>> "lost". (default to tap2 instead of tap1, to make blktap2 work >>> out-of-the-box with virt-install and virt-manager when using file >>> based images as disks for VMs). >>> >>> So.. who can build a new version of python-virtinst, with the blktap2 >>> patch applied? >> >> Looks like Johnny's built an updated version and placed it here: >> >> http://people.centos.org/hughesjr/xen4-test/ >> >> Maybe we can leave it there for a day or so for people to test it, and >> push it to the main xen4 repo at EOD tomorrow? >> >> -George >> > > I just successfully completed the installation of a CentOS guest with > this version of python-virtinst. > > Thank you, > > Philippe-A. Lemelin > I am doing a newer: 1. kernel from kernel.org (3.10.63), also the e1000e kernel module for that. 2. libvirt rolling in the last patch in this tree: http://libvirt.org/git/?p=libvirt.git;a=shortlog;h=refs/heads/v0.10.2-maint 3. newer xen-4.2.5 with all released XSAs > 108 (including 116 .. but not 115 as it is not released) and that python-virtinstall I have already modified the the source code and I am building, I'll post when they are reading for testing. Thanks, Johnny Hughes

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Re: [CentOS-virt] Xen4CentOS python-virtinst version issue, blktap2 problem
by Pasi Kärkkäinen 06 Jan '15

06 Jan '15

On Tue, Jan 06, 2015 at 09:38:53AM -0500, Philippe-A. Lemelin wrote: > > > On 15-01-06 09:21 AM, George Dunlap wrote: > >On Tue, Jan 6, 2015 at 11:42 AM, Pasi Kärkkäinen <pasik(a)iki.fi> wrote: > >>Hello, > >> > >>It seems currently when you "yum update" CentOS 6.6 Xen host you end up getting python-virtinst from c6 base repo: > >>python-virtinst-0.600.0-24.el6.noarch > >> > >>and not from Xen4CentOS repo, because the version there is "older": 0.600.0-19. > >> > >>.. which means the centos/xen-specific patch in python-virtinst is "lost". (default to tap2 instead of tap1, to make blktap2 work out-of-the-box with virt-install and virt-manager when using file based images as disks for VMs). > >> > >>So.. who can build a new version of python-virtinst, with the blktap2 patch applied? > > > >Looks like Johnny's built an updated version and placed it here: > > > >http://people.centos.org/hughesjr/xen4-test/ > > > >Maybe we can leave it there for a day or so for people to test it, and > >push it to the main xen4 repo at EOD tomorrow? > > > > -George > > > > I just successfully completed the installation of a CentOS guest > with this version of python-virtinst. > Yep, it works for me too! -- Pasi > Thank you, > > Philippe-A. Lemelin

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Xen4CentOS python-virtinst version issue, blktap2 problem
by Pasi Kärkkäinen 06 Jan '15

06 Jan '15

Hello, It seems currently when you "yum update" CentOS 6.6 Xen host you end up getting python-virtinst from c6 base repo: python-virtinst-0.600.0-24.el6.noarch and not from Xen4CentOS repo, because the version there is "older": 0.600.0-19. .. which means the centos/xen-specific patch in python-virtinst is "lost". (default to tap2 instead of tap1, to make blktap2 work out-of-the-box with virt-install and virt-manager when using file based images as disks for VMs). So.. who can build a new version of python-virtinst, with the blktap2 patch applied? -- Pasi

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Virt SIG Meeting minutes for 16 Dec 2014
by George Dunlap 17 Dec '14

17 Dec '14

Minutes Attending: imcleod, lars_kurth, gwd, kbsingh, dcaro, jonludlam Meetings over Christmas: - Skip the one on 30 Dec; do IRC meeting Jan 13th. Xen update - 4.4.1, libvirt pushed - Notes: xend disabled by default - Plan: Sign, release soon, oVirt - RHEL 7.1 will already rebuild qemu with snapshotting on - But we may want to do the qemu rebuild for 6 as well. - kbsingh: I think oVirt is fine in the sig - sandro to be maintainer, dcaro to also have access / co-maintainer FOSDEM - Probably a hackathon / dojo thing the Friday before - Further discussion to happen on centos-promo Docker update (from Lokesh) - 1.4.0 into c7-testing - working on rocket

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