virt

virt@lists.centos.org

2 participants
1612 discussions

Re: [CentOS-virt] Can KVM and VirtualBox co-exist on same host?
by James B. Byrne 24 Jul '14

24 Jul '14

On Wed, July 23, 2014 10:11, Tom Bishop wrote: > That is the easy answer, they do conflict but it does not mean you > cannot load them both up. You just cannot run them both at the same > time, in order to run one vs the other you need to remove some kernal > mods and insert some etc depending on which one you want to run. > > So the answer is yes you can if you want to you just have to do some > work, here is a decent write up that goes into some detail but there > may be some better examples - > http://www.dedoimedo.com/computers/kvm-virtualbox.html > Thanks, I found a write up on scripts that detect and unload/load the kvm and kvm-intel modules. In fact, the very one that you referenced. And I had already gathered that one probably cannot run both a kvm and a vb hypervisor on the same host at the same time. I was wondering if there was any other issues respecting having both of them installed on the same host at the same time even if only one, or neither, is running? A supplemental question: Is there any way to convert a VB guest image into a KVM guest image? The VM image in question is MicroSoft's IE6 development image for MS-XPproSP3. We have a government mandated program that is written in J# and the last OS to support that is XP. I have to get some sort of virtualised XP guest running and as the transferable licenses for that OS are somewhat scarce I thought I might try and get the legal VM version running. However, I would prefer to stick with KVM if at all possible. -- *** E-Mail is NOT a SECURE channel *** James B. Byrne mailto:ByrneJB@Harte-Lyne.ca Harte & Lyne Limited http://www.harte-lyne.ca 9 Brockley Drive vox: +1 905 561 1241 Hamilton, Ontario fax: +1 905 561 0757 Canada L8E 3C3

2 1

DomUs error when stopping xendomains
by Karl Johnson 22 Jul '14

22 Jul '14

Hello, I have the following error with Xen 4.2.4-33 when stopping xendomains: Shutting down Xen domains: Domain-0(skip) xen101(save).. xen101(save)............ xen102(save). An error occurred while saving domain: Error: Domain '9' does not exist. ! (shut). An error occurred while shutting down domain: Error: Domain '9' does not exist. ! xen102(save)............ xen103(save). An error occurred while saving domain: Error: Domain '11' does not exist. ! (shut). An error occurred while shutting down domain: Error: Domain '11' does not exist. ! After reading a bit on Google I've found that this can be fixed by changing the LIST_GREP in xendomains: +LIST_GREP='^(domain$\|(domid\|(name\|^{$\|"name":\|"domid":' -LIST_GREP='((domain\|(domid\|(name\|^{$\|"name":\|"domid":' This fix works. Is this a known bug in the xen4centos release? Karl

1 0

Re: [CentOS-virt] Centos 7 KVM questions
by Tom Bishop 21 Jul '14

21 Jul '14

On Mon, Jul 21, 2014 at 12:38 PM, Tom Bishop <bishoptf(a)gmail.com> wrote: > Clean install of centos 7 and I have most things working, however the > default virbr0 interface is not getting any addressing. The interface > in network manager just spins and spins and never gets an address. I > thought at first it was something about firewalld which I am trying to > come up to speed with but I do not believe that is the issues. > > I guess the questions that I have is what is the correct way to add > KVM and all of the virt packages to a minimal centos 7 installation. > I would like to understand bridged interfaces vs the nat interfaces > what what needs to be installed/configured. > > Thanks in advance. I think I have found the information, in the RHEL documentation - https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/ht… but I have to chuckle that it appears they have not fully updated the information beacause of this blurb: To create a bridge (br0) based on the eth0 interface, execute the following command on the host: # virsh iface-bridge eth0 br0 what the heck is an eth0 interface, they already took that away too ;)

1 0

Centos 7 KVM questions
by Tom Bishop 21 Jul '14

21 Jul '14

Clean install of centos 7 and I have most things working, however the default virbr0 interface is not getting any addressing. The interface in network manager just spins and spins and never gets an address. I thought at first it was something about firewalld which I am trying to come up to speed with but I do not believe that is the issues. I guess the questions that I have is what is the correct way to add KVM and all of the virt packages to a minimal centos 7 installation. I would like to understand bridged interfaces vs the nat interfaces what what needs to be installed/configured. Thanks in advance.

1 0

C7 image that can boot on x4c6
by Venkat Rayaprolu 19 Jul '14

19 Jul '14

Hi All, I am new to this community. I have experience in testing different virtualization products such as VMware, Xen and Oracle Virtual Server for more than 8 years. Can I contribute to testing C7 image that can boot on x4c6? Please help me on whom to contact for this? Thanks, Venkat

1 0

Fwd: About Centos 7 + Virt-manager
by Pablo Silva 17 Jul '14

17 Jul '14

Dear Colleagues: I'm trying to use virt-manager to create a container with lxc, as the picture I attached, I indicated that I must point to a directory where the template is to manage it with virt-manager. I tried to use a template of http://wiki.openvz.org/Download/template/precreated, but not working, being on the console option displays a black screen with nothing. I wonder, where can I get a template to work with virt-manager, or what are the steps to follow so you can create a template with Centos Minimal, do not know if the template must be the same version of Centos 7 or can be a template with Centos 6.5 In advance, thank you very much. -Pablo http://picpaste.com/Captura_de_pantalla_2014-07-15_a_las_10.47.26-DHi28gtt.… http://picpaste.com/Captura_de_pantalla_2014-07-15_a_las_10.49.02-y4TkGxLY.…

4 12

Re: [CentOS-virt] Xen PV domU reported as Xen-HVM
by Karl Johnson 07 Jul '14

07 Jul '14

On Tue, Jun 17, 2014 at 5:36 AM, George Dunlap <dunlapg(a)umich.edu> wrote: > On Thu, Jun 12, 2014 at 11:23 PM, Karl Johnson <karljohnson.it(a)gmail.com> > wrote: > > Hello, > > > > I am running two dom0s, one on CentOS 5 with Xen 4.1.2 (from Gitco) and > the > > other one on CentOS 6 with Xen 4.2.4 (from Xen4CentOS). I host one LVM > based > > domU on both from the same template (CentOS 6 PV) with the same Xen > config > > (see below). However, the domU on Xen 4.1 reports itself as Xen PV while > the > > domU on Xen4CentOS reports itself as Xen HVM. > > > > > > == First domU == > > > > virt-what and cPanel scripts report domU as: xenpv > > > > dom0: 2.6.18-371.6.1.el5xen Xen 4.1.2 > > > > domU Config: > > > > bootloader = '/usr/bin/pygrub' > > extra = '' > > memory = 6144 > > hostname = 'web2.x.ca' > > cpu_weight = 256 > > name = 'vm115' > > vif = ['ip=205.X.X.X, vifname=vifvm115.0, mac=00:16:3e:7a:X:X'] > > vnc = 0 > > vcpus = 6 > > vncviewer = 0 > > serial = 'pty' > > disk = ['phy:/dev/xen/vm115_img,xvda1,w', > > 'phy:/dev/xen/vm115_swap,xvda2,w'] > > > > domU kernel: 2.6.32-431.5.1.el6.x86_64 > > > > root@web2 [~]# virt-what > > xen > > root@web2 [~]# > > > > > > > > == Second domU == > > > > virt-what and cPanel scripts report domU as: xenhvm > > > > dom0: 3.10.32-11.el6.centos.alt.x86_64 Xen 4.2.4-29.el6 > > > > domU Config: > > > > bootloader = '/usr/bin/pygrub' > > extra = '' > > memory = 6144 > > hostname = 'web3.x.ca' > > cpu_weight = 256 > > name = 'vm116' > > vif = ['ip=205.X.X.X, vifname=vifvm116.0, mac=00:16:3e:cf:X:X'] > > vnc = 0 > > vcpus = 6 > > vncviewer = 0 > > serial = 'pty' > > disk = ['phy:/dev/xen/vm116_img,xvda1,w', > > 'phy:/dev/xen/vm116_swap,xvda2,w'] > > > > domU kernel: 2.6.32-431.5.1.el6.x86_64 > > > > root@web3 [~]# virt-what > > xen > > xen-hvm > > root@web3 [~]# > > > > Any idea why? > > A lot of these tools use quirks of the hypervisor to detect these > kinds of changes. One such quirk in Xen PV is handling of the CPUID > instruction: normally there's no way to trap the CPUID instruction in > PV mode, so Xen introduced a special PV CPUID (which is just an > illegal instruction that Xen recognizes and emulates itself) that the > kernel is supposed to use instead; but that's an opt-in thing -- you > can still execute the normal CPUID. By executing the PV CPUID and the > normal CPUID and comparing the results, you can tell if you're in a PV > or an HVM VM. > > However, on recent architectures Intel has introduced functionality to > allow trapping os CPUID even in non-HVM mode. Support for this went > into 4.2. Now, if you have the right hardware, and the right Xen > version, you'll get the same results whether you execute the PV CPUID > or the native one. > > So virt-what's trick of comparing the two CPUID results to determine > if you're in a PV or an HVM domain doesn't work anymore. > > -George > Thanks for the reply George. Is there any other easy way in the domU to know if it's a pv or hvm with Xen 4.2+ and the right hardware? Karl

2 1

I have a question regarding the virtual scsi adapter.
by Eliezer Croitoru 03 Jul '14

03 Jul '14

I have a very old system which has a self compiled kernel. It' supports sata and megaraid but not LSI SCSI or BUSLOGIC scsi. I am not sure what SCSI adapter is being used on CentOS KVM host and there for what kernel options to enable in the new compiled kernel. I have tried to add LSI logic and it seems like still not recognizing the SCSI device. I have another kernel that do work but it was build with lots of modules and I am not sure which one of them is the appropriate one. The linux kernel version of the guest is 2.6.19. If someone has a .config file that has all the needed modules complied in the kernel I will be happy to see it. Thanks, Eliezer

1 0

Minutes of 1 July Virt SIG meeting (IRC)
by George Dunlap 01 Jul '14

01 Jul '14

Not too many people today. Present: - George - Pasi - Johnny H Covered - Update to 4.4.1 sooner, don't wait for the community build system to be up ACTION: George to rebase to 4.4.1-rc1, Johnny to build an RC for testing - virt-manager for C6 erroneously installs C7 as PV, even though it installs RH7 as HVM ACTION: hughesjr to send a bug report (or find someone to do so) - pv-grub-menu ACTION: pasi maybe to take a look in the next few weeks. ACTION: George to add to roadmap

1 0

[ Off Topic ] WorkShop Virtualização com Proxmox VE
by Gilberto Nunes 30 Jun '14

30 Jun '14

WorkShop Virtualização com Proxmox VE ------------------------------ <https://www.facebook.com/sharer/sharer.php?s=100&p[url]=http://blog.konnect…> Dia 12 de Julho, Sábado, a partir das 08hs00 acontecerá o WorkShop Virtualização com Proxmox VE. Venha conhecer uma das melhores ferramentas de Virtualização do Mercado. Com este treinamento, sua equipe de TI terá uma ótima ferramenta de virtualização. - O que é o Proxmox VE - Instalação e Configuração - Clusterização e Alta Disponibilidade de Virtual Machines - Backup de VM - Snapshot... - Desktop Virtual com Spice - Cluster e Alta Disponibilidade O evento acontecerá dia 21 de Julho de 2014, em Joinville - Santa Catarina. Será um Sábado, sendo que o horário o que segue abaixo: Início: 08hs00 Intervalo: 10hs00 Almoço: 12hs00 ( * ALMOÇO NÃO INCLUSO. ) Retorno: 13hs00 Encerramento: 16hs00 Será realizado nas dependências da Fundação Softville, cito no endereço abaixo: *R. Otto Boehm, 48 - América, Joinville - SC, 89201-700* Local do Evento <http://blog.konnectati.com.br/arquivos/1276> Rua Otto Boehm, 48 - América, Joinville - SC, República Federativa do Brasil Fundação Softville more >> <http://blog.konnectati.com.br/arquivos/1276> Aproveite! Facilidade de pagamento, certificado e apostila. Contato: gilberto.ferreira(a)konnectati.com.br (47) 9676-7530 Ementa do Treinamento: Clique aqui para ter acesso <http://www.konnectati.com.br/pasta/indica2.pdf>. Investimento: R$ 800,00 por pessoa. *Clique aqui e compre agora! <http://blog.konnectati.com.br/produto/treinamento-proxmox-ve>* ** Parcele em até 12 vezes nos cartões Visa, Master e American Express...* [image: WorkShop] <http://blog.konnectati.com.br/wp-content/uploads/treinamento-pve-softville.…> -- Gilberto Ferreira

1 0

Jump to page:

2025

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

virt