Linux Kernel Virtual Machine is a virtualization system (VM)

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KVM live migration i/o error

I have three Ubuntu Server 14.04 trusty with KVM. Two of them are HP servers and one is Dell. Both brands run fine the KVM virtual servers, and I can do live migration between the HPs. But I get I/O ...
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KVM accessibility from host machine

We have a KVM Host machine running multiple VMs. I am now tasked to create an instance with very sensitive data. Setting firewall and other OS specific settings is not the problem. Question is: can, ...
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Unable to get the Full screen in KVM

I installed CentOS 6.4 in KVM (Kernel-based Virtual Machine), My base machine is Scientific Linux 6.4. I am unable to get the full screen in KVM, In virt-manager if I select full screen also both ...
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304 views

How to change the disk interface type for my Windows 8.1 guest on KVM

I recently setup a Windows 8.1 VM with KVM and virt-manager. I initially set the disk interface to be IDE, but I'd like to change it to virtio. However, if I just change the interface in the ...
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265 views

Control fan speed under linux without nvidia drivers

I have quemu-kvm configuration like this - IGP on host (linux) and Nvidia on guest (windows). I blacklist nvidia drivers under linux (arch dist.). Is there a way to set GPU fan speed under linux ...
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172 views

No outgoing traffic through passthrough network adapter (NIC ) on KVM guest

I have KVM host operated under CentOS 7 and guest with Windows 7 on it. Host NIC is passed to the guest as PCI device passthrough (not bridge, not NAT). Guest detects the NIC (drivers, cable plug, ...
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119 views

Show qemu command line from virsh

I am debugging a problem with a libvirt VM starting, and I want to see the exact command line that it is going to use to start qemu. Is this possible using virsh or some other utility?
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949 views

FreeBSD KVM port maturity

What information is available on the stability and maturity of the FreeBSD KVM port? Please only share in-depth articles on why it would be stable, or why it wouldn't be based on real life ...
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278 views

Cannot create a virtual machine on Fedora: Activation of org.freedesktop.machine1 timed out

I am trying to create a new VM within Fedora using virt-manager. However, I get the following error: Traceback (most recent call last): File "/usr/share/virt-manager/virtManager/asyncjob.py", line ...
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249 views

What happens when KVM virtual machines try to use the same core of a processor?

I have many virtual machines hosted with KVM on a single server. The problem(?) is there are now more machines then cores of the processor. From what I found I cannot use more RAM then I have but can ...
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1k views

kvm+vfio+vga passthrough, got “root.1” not found

I have a 64bit windows VM using KVM. I want to try VGA passthrough. I started my VM with: qemu-system-x86_64\ -monitor stdio\ -enable-kvm -m 2048 -no-fd-bootchk -localtime -M q35\ -bios ...
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195 views

I can't see apache, nginx process while using “top” command

As the title said: "I can't see apache or nginx process while I'm using top command" I'm using CentOS 6.5 and of course I already installed it on my server. I run them as a service by using these ...
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1answer
30 views

I want to start VM for specific time

I am designing a system in which lot of VMs are there which run on KVM. My physical resources are limited, that is why I want to allow some of the VMs to run for some specific time(say Every Wednesday ...
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2answers
320 views

Install ubuntu on kvm in console

I use the following command to install Ubuntu server on KVM in a remote server using SSH console. But it seems that it does not recognize the iso image I provided as (a) it does not install without ...
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267 views

Unable to start VM from php

From a php page I am trying to start Virtual Machine using virsh tool on KVM hypervisor but I am getting this error. error: Failed to connect socket to '@/var/www/.libvirt/libvirt-sock': Connection ...
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359 views

Why is [ssh,scp,rsync,etc] so slow, from a VM to another local machine on my gigabit local network?

I have a VM A running the latest archlinux with QEMU, KVM and a Virtio network card. It is a buildbot and it needs to drop the result on another machine B on the local network. The VM is started with ...
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519 views

KVM bridged networking issues

newbie warning: I'm completely new to virtualization so there might be an ridiculously simple solution to this... I'm trying to run a virtual machine with KVM on Ubuntu 14.04.1 LTS as host. For ease ...
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222 views

What's wrong with RHEL 6.5 on POWER in a PowerKVM guest?

I am seeing errors on two PowerKVM (Ver 2.1 SP1) systems on booting to the console of the form: irq: irq 4110 on host null mapped to virtual irq 27 BUG: Bad page state in process vballoon ...
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7k views

How to boot a KVM virtual machine raw image to VirtualBox?

I have received a .img file of a server which is a Virtual Machine running in a KVM environment. The Virtual Machine was installed with Ubuntu. I would now like to take this .img file and "emulate" ...
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353 views

Enabling Intel VT-x on Vagrant guest

I'm running OSX Mavericks, and I know hardware virtualization is enabled. I have a debian VM in Vagrant with a virtual CPU that has support for hardware virtualization, but the vmx flag is disabled. ...
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302 views

qemu: How to use resolutions > 1024x768 in Windows 8(.1)?

In previous Windows versions, I was able to get higher resolutions in qemu/qemu-kvm by passing the -vga std or -vga vmware command line parameters. However, when I try the same for Windows 8 (and ...
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131 views

Weird output from linux `top` command

I got a weird output from command top, which shows the summation of the RES column is greater than my physical memory. For instance, I have a host with 64G physical memory and the swap partition has ...
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1k views

why do i get swapping even if i set vm.swappiness to 0?

I have a couple centos 6.5 x64 servers with 64GB ram running lots of kvm vps's. some of these servers have no swap usage at all and some do. I've set swappiness to zero. However some still swap even ...
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8k views

Mirror Port via iptables

I have a dedicated Linux (Debian 7.5) root server, with a number of guests set up. The guests are KVM instances, and get network access via bridge-utils (NAT, internal IPs, use the host as a gateway). ...
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197 views

KVM Arch install - no network

I often use KVM to try out various Linux distros. All I have tried so far get an automatic network, Red Hat and Debian have all connected out of the box, no problem. Makes installations very easy. ...
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What's the diffrence between snapshot-create and snapshot-create-as in virsh kvm?

On my virtualization system there are some VMs. One of them was aimed for testing some services on it. So in this case I need to have the first state of that VM. I searched for a solution found the ...
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2k views

Unable to get folder sharing to work under KVM Virtual Machine Manager

I've created an Ubuntu VM inside my Ubuntu using Virtual Machine Manager. I'm trying to mount a host directory in guest OS but it's not working. I used the instructions provided here: ...
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814 views

nova-compute libvirt x86_64 emulator Error

I was trying to install openstackin Ubuntu12.04 server. I find that Nova-compute is not getting started and the error is the below. I followed some of the suggestions in various forums, but nothing ...
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105 views

Is Flash hardware acceleration assignable to a given GPU?

On a KVM Windows guest with VGA passthrough, Flash hardware acceleration is not working, e.g. it shows a green screen for youtube videos. The GPU (AMD) is working well and has the latest drivers, ...
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259 views

can't connect to kvm rhel guest from fedora host over any port other than 22 (ssh)

I have a kvm guest running Red Hat Linux in a Fedora 19 host. Running a ruby app in the guest on port 3000. I can ping the guest, and ssh into it from the host, but I cannot access the app itself. ...
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329 views

VPN access kvm guests

OpenVPN is installed on my host system running kvm as virtualization and I've several guests with static/public (Bridged) and private IPs (NAT), every guest uses Samba to share some folders. how can ...
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121 views

Virtual machine internal network - same host

If I have 2 VMs (web server + db server) on same physical host, how can they communicate? Being on the same host what speed can expect? Its CentOS KVM. What is the situation with SmartOS Zones where ...
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2k views

How do I convert my windows partition to a kvm virtual machine on Fedora?

I have a single hard drive with a windows partition and a fedora 19 partition. Is it possible to use a tool (e.g. virt-p2v) to convert the windows installation into a virtual machine on Fedora? Disk ...
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158 views

Ubuntu KVM failed to set up

I'm trying to set up a VM with KVM on my Ubuntu 12.04 machine (64 bit). I followed the installation instructions to the letter at http://www.howtoforge.com/virtualization-with-kvm-on-ubuntu-12.04-lts ...
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146 views

One speaker set for two computers

In my case, i have a setup of a linux host machine and a windows virtual machine, i have a soundblaster dedicated sound card and an intergrated intel hd soundcard. I was thinking i want to use the ...
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1answer
2k views

Copy/paste issue in Ubuntu virtual machine (QEMU-KVM) with Awesome window manager

I have Ubuntu 12.10 virtual machine running in QEMU-KVM. Copy/paste between host and vm works fine when using Unity as window manager but not while using Awesome. What is the difference between ...
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Virtual machines using wrong IP addresses

I have a host computer (A), running three virtual machines: X,Y and Z. They're under a NAT layer, in which the Host A is the gateway (192.168.0.1/16), and the VM's are respectively 192.168.0.2 (X), ...
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Wireless bridge on KVM virtual machine

I have a VM host (KVM) that's connected to a wireless router. I'd like the virtual guests to be in the same broadcast domain as the host; i.e, receive their IP from the router's DHCP. (=Layer 2 ...
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3k views

kvm cpu0 disabled perfctr wrmsr - hangs

I initially asked this question on StackOverflow, but it was marked as off-topic and said I might get help here.. so here it is ============== I am currently running Centos 6.5, and tried to follow ...
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138 views

How to access CD-ROM inside kvm guest machine?

I am using KVM in Scientific Linux 6.4 Inside that KVM again I installed Scientific Linux 6.4 as a guest. Now I want to access CD-ROM from that guest machine. In the command prompt it not showing any ...
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7k views

Implementing PCI-Passthrough with Linux-KVM on Debian

I am attempting to use PCI-Passthrough to attach an old video card (Radeon 4770) to a virtual machine. I am using Linux-KVM to run my virtual machines on a Debian Linux (Wheezy, 3.2.0-4-amd64) host. ...
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441 views

Extend partition in KVM

I want to extend my qcow2 image file. We have installed a windows machine on it. Below are the steps we performed. virt-filesystems --long -h --all -a windows-7-64.qcow2 truncate -s ...
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443 views

How to set up a VM gateway/DHCP and virtual network in CentOS KVM?

Today I have a working setup where the physical host runs W2k3. It has 2 physical NIC's. It runs Vmware server and I have a ClearOS VM installed acting as a FW/DHCP/DNS for both the host and all the ...
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151 views

Unknown OS hostname and product in virt-manager

I'm using libvirt on a Fedora 19 host, running various Linux guests with QEMU and KVM hypervisors. Using the virt-manager GUI, when I look at the guest Overview screen, in the Operating System ...
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590 views

How can I write a Windows (NTFS) .img file to a partition and add it to grub?

I'm trying some crazy stuff here. First, I had a VirtualBox machine with Windows XP installed, using .vdi format. Then I exported the image to a OVA, extracted the .vmdk and converted it to a raw .img ...
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439 views

kvm debian squeeze ERROR: internal error Child process

Having issues creating virtual machines in Debian Squeeze. The host is a Dell Poweredge with Xeon processor, running Debian Squeeze - kernel 3.2.0-4-amd64 When I try to create the VM through ...
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How to exit a “virsh console” connection?

Is there any special characters involved? I want to be able to open a console connection in my application and exit upon completion of a task
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451 views

Networking Issue with libvirt (kvm)

I'm running a desktop class computer tower with Ubuntu Server 13.04 (64-bit) installed. The server is configured with libvirt, and I use virt-manager to control and configure the VMs as well as ...
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60 views

Virtual Machine stalls after migration

I have Ubuntu VMs running on an Ubuntu server Host. When moving a VM from one host to the other using virsh migrate --live some of the VMs stall out. The only way to get them back is to kill them and ...
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pulseaudio, in a KVM virtual machine (as root) and your desktop (not root) playing audio at the same time?

How do you get pulseaudio to play sound in a KVM virtual machine (running as root) and your desktop apps (not running as root) at the same time? It seems that by default, it will only play sound for ...