virt July 2015

virt@lists.centos.org

26 participants
27 discussions

How to debug Ubuntu 8.04 LTS guest crash during install?
by Neil Aggarwal 04 Nov '25

04 Nov '25

Hello: I am using kvm on a CentOS 5.4 server. I am trying to install the TunkeyLinux Core appliance found here: http://www.turnkeylinux.org/core I downloaded the ISO file from the web site. Then, I used this command to intall it: virt-install -n tkl-core -r 512 --vcpus=1 --check-cpu --os-type=linux --os-variant=ubuntuhardy -v --accelerate -c /tmp/turnkey-core-2009.10-hardy-x86.iso -f /var/lib/libvirt/images/tkl-core.img -s 15 -b br0 --vnc noautoconsole When I connect to the VNC console, I get the Turnkey linux options screen. I select Install to hard disk from there and it seems to start the install but crashes during the installer startup. This is repeatable so there has to be a way to debug it. I tried turning on the debug option for virt-install but that did not give me any useful info. Any ideas how to debug this? Thanks, Neil -- Neil Aggarwal, (281)846-8957, http://UnmeteredVPS.net/cpanel cPanel/WHM preinstalled on a virtual server for only $40/month! No overage charges, 7 day free trial, PayPal, Google Checkout

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Beta CentOS 7 Xen packages available
by George Dunlap 08 Sep '15

08 Sep '15

At long last, I'd like to announce beta packages for CentOS 7, available from the community build system. Start by installing the centos-release-xen: rpm -ivh http://cbs.centos.org/repos/virt7-xen-44-testing/x86_64/os/Packages/centos-… This will set up yum repositories for both the eventual release repositories (enabled by default), and the community build system repositories (disabled by default). At the moment, all packages will be stored in the virt-xen-44-testing repository. You can either enable this by default by editing /etc/yum.repos.d/VirtSIG-Xen.repo, or by adding "--enablerepo=virt-xen-44-testing". If you want, you can edit defaults /etc/sysconfig/xen-kernel Next, run 'yum update' to get the new kernel: yum --enablerepo=virt-xen-44-testing update kernel Now install xen: yum --enablerepo=virt-xen-44-testing install xen This should grab both xen and the updated kernel package. It should also automatically: * Add default commandline parameters for Xen and Linux when booting under Xen * Arrange for xen to come up first in the grub * Set the default boot entry to Xen. That's it! Reboot and you should be good to go. Libvirt packages aren't available yet but should be on the way soon (I'll announce them here.) Please report any problems or feedback to this list. -George

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qemu-kvm-ev with CentOS 7.1
by Gena Makhomed 18 Aug '15

18 Aug '15

Hello, All! Is it possible to use binary packages build from http://resources.ovirt.org/pub/ovirt-3.5/rpm/el7/SRPMS/qemu-kvm-ev-2.1.2-23… with plain CentOS 7.1 and use all other packages from CentOS (libvirt, virt-manager, etc) Is it have reasons, if I not use live migrations and qcow2 snapshots? (instead use zfs, zvols and zfs snapshots for VM disks online backups) Is using qemu-kvm-ev with CentOS 7.1 have any disadvantages? -- Best regards, Gena

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How to kickstart a guest with Centos 6.6 & Xen 4.4
by Elliot Fox 03 Aug '15

03 Aug '15

Hello, I posted a question over at xenproject.org but it was recommended that I send out a message here for help. My post there: http://www.xenproject.org/help/questions-and-answers/vanilla-pv-centos-gues… The TL;DR is: Everything I've found to kickstart a new vanilla rhel/centos guest points to specifying a kernel & and initrd- for RHEL/Centos 5. But where is the xen initrd for Centos 6? The Xen4Quickstart instructions are awesome, but after install you are left with a kernel and an initramfs & no initrd for a centos 6 guest in xen. So is there a better way to kickstart a fresh/vanilla VM post Xen4Quickstart instructions? Shall I build an initrd from the initramfs (and how) or is there another way? Apologies if this is discussed elsewhere, but if it is I have yet to find it and I've been looking around for some time. Thank you!

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Timezone issues with migrations between host kernel 3.10 and 3.18
by Nathan March 30 Jul '15

30 Jul '15

Hi All, I'm seeing clock issues with live migrations on the latest kernel packages, migrating a VM from 3.10.68-11 to 3.18.17-13 results in the VM clock being off by 7 hours (I'm PST, so appears to be a timezone issue). This is also between xen versions, but rolling the target back to 3.10 resolved so don't believe the recent XSA's are related. Anyone else seen behavior like this or have any ideas on how to resolve? - Nathan

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Re: [CentOS-virt] Where are the Centos 7.1 1503 KVM repos please?
by Keith Roberts 27 Jul '15

27 Jul '15

Thanks for all the replies. Looking at the specs for the processor it does not seem to have the vmx features in /proc/cpuinfo: http://www.notebookcheck.net/Intel-Core-2-Duo-T6400-Notebook-Processor.3510… and the output from grep -E ‘vmx|svm’ /proc/cpuinfo is empty. /lib/modules/3.10.0-229.7.2.el7.x86_64/kernel/arch/x86/kvm [keith.roberts@acer-centos kvm]$ ls kvm-amd.ko kvm-intel.ko kvm.ko [keith.roberts@acer-centos kvm]$ [keith.roberts@acer-centos kvm]$ modprobe kvm-intel modprobe: ERROR: could not insert 'kvm_intel': Operation not permitted [keith.roberts@acer-centos kvm]$ lsmod | sort ... iwlwifi 112501 1 iwldvm jbd2 102940 1 ext4 kvm 461126 0 libahci 32009 1 ahci [keith.roberts@acer-centos kvm]$ modprobe kvm-amd modprobe: ERROR: could not insert 'kvm_amd': Operation not permitted [keith.roberts@acer-centos kvm]$ modprobe kvm-intel modprobe: ERROR: could not insert 'kvm_intel': Operation not permitted Is it still possible to create some KVM type virtual machines with this laptop, to be ported to the VM host server machine later, or do I need another laptop with the required CPU flags? Kind Regards, Keith On 24 Jul 2015, at 16:46, Marcos Amorim <marcosmamorim(a)gmail.com> wrote: > Keith, > > What error? > > What's your processor? if it's AMD, you need modprobe kvm_amd instead of kvm_intel. > > > Marcos Amorim > > > > 2015-07-24 12:27 GMT-03:00 Keith Roberts <keith.roberts(a)ecric.nhs.uk>: > > On 24 Jul 2015, at 15:51, Marcos Amorim <marcosmamorim(a)gmail.com> wrote: > >> >> Warning: This message contains unverified links which may not be safe. You should only click links if you are sure they are from a trusted source. >> Keith, >> >> Try modprobe >> modprobe kvm >> modprobe kvm_intel >> >> >> Regards, >> >> >> Marcos Amorim > > Thanks Marcos. > > I tried modprobe kvm and that loaded that kernel module. > > I got an error trying to load the kvm_intel module though. > > Kind Regards, > > Keith > > > _______________________________________________ > CentOS-virt mailing list > CentOS-virt(a)centos.org > http://lists.centos.org/mailman/listinfo/centos-virt > > > _______________________________________________ > CentOS-virt mailing list > CentOS-virt(a)centos.org > http://lists.centos.org/mailman/listinfo/centos-virt

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XSA-138: Updated packages available (xen-4.4.2-5)
by George Dunlap 27 Jul '15

27 Jul '15

The Xen Project has publicly released XSA-138: http://xenbits.xen.org/xsa/advisory-138.html All users using HVM (fully virtualized) guests with emulated CDROM drives are advised to upgrade. There are signed versions of Xen4CentOS6 packages uploaded to the mirror system. There are also unsigned packages available on the CBS: http://cbs.centos.org/repos/virt6-testing/x86_64/os/Packages/ http://cbs.centos.org/repos/virt7-xen-44-testing/x86_64/os/Packages/ -George

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Xen 4.4.2-5 and Kernel 3.18.17 released to xen4 repository
by Johnny Hughes 27 Jul '15

27 Jul '15

I have released the xen-4.4.2-5.el6 rpms (fix XSA-137 and 138) and the kernel-3.18.17.el6 rpms (fix the broadcom driver issues) to the xen4 repository. Thanks, Johnny Hughes

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Re: [CentOS-virt] Where are the Centos 7.1 1503 KVM repos please?
by Keith Roberts 27 Jul '15

27 Jul '15

Hi Marcos. The processor is an intel centrino in an acer aspire 5735 laptop. I’ll take another look at this problem later, and post the exact error message asap. Kind Regards, Keith On 24 Jul 2015, at 16:46, Marcos Amorim <marcosmamorim(a)gmail.com> wrote: > Keith, > > What error? > > What's your processor? if it's AMD, you need modprobe kvm_amd instead of kvm_intel. > > > Marcos Amorim > > > > 2015-07-24 12:27 GMT-03:00 Keith Roberts <keith.roberts(a)ecric.nhs.uk>: > > On 24 Jul 2015, at 15:51, Marcos Amorim <marcosmamorim(a)gmail.com> wrote: > >> >> Warning: This message contains unverified links which may not be safe. You should only click links if you are sure they are from a trusted source. >> Keith, >> >> Try modprobe >> modprobe kvm >> modprobe kvm_intel >> >> >> Regards, >> >> >> Marcos Amorim > > Thanks Marcos. > > I tried modprobe kvm and that loaded that kernel module. > > I got an error trying to load the kvm_intel module though. > > Kind Regards, > > Keith > > > _______________________________________________ > CentOS-virt mailing list > CentOS-virt(a)centos.org > http://lists.centos.org/mailman/listinfo/centos-virt > > > _______________________________________________ > CentOS-virt mailing list > CentOS-virt(a)centos.org > http://lists.centos.org/mailman/listinfo/centos-virt

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Re: [CentOS-virt] Where are the Centos 7.1 1503 KVM repos please?
by Keith Roberts 24 Jul '15

24 Jul '15

On 24 Jul 2015, at 15:51, Marcos Amorim <marcosmamorim(a)gmail.com> wrote: > > Warning: This message contains unverified links which may not be safe. You should only click links if you are sure they are from a trusted source. > Keith, > > Try modprobe > modprobe kvm > modprobe kvm_intel > > > Regards, > > > Marcos Amorim Thanks Marcos. I tried modprobe kvm and that loaded that kernel module. I got an error trying to load the kvm_intel module though. Kind Regards, Keith

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virt July 2015