Linux Kernel Virtual Machine is a virtualization system (VM)

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linux KVM Virtualization: USB cameras and nvidia graphics cards with dual display

I wonder if is possible to create with KVM guest machines (Windows and Linux) they can use 2 monitors (in desktop extension), USB cameras and graphics cards like Nvidia
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Why KVM is called Kernel-based Virtual Machine?

I want to know how KVM stands for Kernel-based Virtual Machine. Is there any reason behind? Is it due to "OS" work on kernel position i mean ring 0 or Level 0? Is my assumption is correct or not? If ...
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guestfs-xxxxxx VMs appearing in LibVirt (virt-manager)

I have a KVM+LibVirt based hypervisor running on Fedora 22. I use virt-manager for managing the VMs over SSH. For some reason I see "guestfs-00kxipwaewnkoq92" VMs appearing and disappearing at ...
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Linux - redirect SSH on a port to another machine on local network

I have a KVM guest machine on a virtual network. It has an IP address like 192.168.122.65. The host machine is connected to the public internet. If I open a terminal on the host machine, I can SSH ...
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KVM - let the guest listen on a port

I've set up a KVM virtual machine via a VNC connection. It has a "virtual" (?) IP address like 192.168.122.65. This VM runs an SSH server, and obviously, I'd like to be able to log in to it via SSH ...
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Installing KVM virtual machine hangs at “connecting to graphical console for guest”

I am using KVM to install a virtual machine on RHEL 7.0, but the installing hangs, and displays "connecting to graphical console for guest": The terminal log is like this: [167804.496139] ...
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39 views

Does qemu/KVM allow sound through Spice?

I'm setting up a Windows 7 virtual machine to try and eliminate my physical partition. I have it installed and working with Spice and the drivers from the fedora site: ...
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41 views

KVM: iphone passthrough to windows guest

I use KVM on a ubuntu 15.04 guest and a windows 7 and windows 10 guests. I connect my iPhone to my PC and want to redirect it (using virt-manager) to the guest. I always get the error. ...
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How to configure macvtap to let it pass multicast packet correctly?

I'm trying to create VMs which can see each other and host. They are hosted with qemu/kvm and managed via libvirt. The network adapter of VMs is created with macvtap(VEPA mode) for performance. After ...
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KVM inserts CD ROM at reboot even if kickstart has “reboot --eject”

When installing a VM on KVM host with a kcikstart profile that specifies "reboot --eject" option, on one specific host in our lab, the CD is re-mounted and the installation starts again. For another ...
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How do I replace the dump of my USB recovery media with a more simple EFI partition in this situation?

The situation is as follows: this is a new Dell Precision M3800; it comes with a Windows 8.1 pro version and a USB recovery medium; the machine uses UEFI; I immediately scratched Windows and ...
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What is the page replacement policy in KVM?

I found this picture explaining how Disk I/O is done in KVM. A the image is on http://i.stack.imgur.com/ijd8m.png So, does it use shadow page table or makes two copies of the page when a page ...
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44 views

How to configure Portforwarding on KVM Hypervisor?

I have a Debian install 3.2.68 with KVM/qemu/libvirt as hypervisor. In "/etc/network/interfaces" I only see eth0 with my static ip, but if I enter "ifconfig" I see also an "virbr0" interface with the ...
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104 views

Unable to resume KVM guest after rebooting host

I'm running KVM on Linux Mint 17.1, kernel 3.16.0-31-generic. The only guest is a Windows 8.1 VM. I've noticed that if I reboot the host while the guest is running, I'm unable to resume the guest ...
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virt-install Centos 6.6 - No option 'boot.iso' in section 'images-x6_64'

I'm having trouble using kickstart to set up a VM in kickstart for the first time. I've copied the files off a mounted Centos 6.6 minimal iso to a local ftp server: ftp: //198.162.1.161/pub/inst/ My ...
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Guest DHCP server

I have a host (CentOS 7 with kvm/libvirt). There are 2 network interfaces on this host. eth0 and eth1. eth1 has no IP address but instead has subinterfaces for each VLAN it is connected to. An example ...
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Does my CPU support hardware virtualization?

I have an ubuntu 12.04 virtual machine installed with virtual box, and I've also installed KVM on it, from a MacBook pro with an intel i5 processor. I'm trying to instantiate a virtual machine on my ...
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Can we use Ceph or Gluster FS to avoid IO bottleneck to start many VMs?

AIM: I want to start 50s of VM on s single server or on a set of PCs. Scenerio: I tried to boot 15 VM on a single server with enough computing power(processor) and RAM but disk is a bottleneck in ...
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Use libvirt to configure KVM guest with user defined tap device

As far as I know, if we set up kvm guest OS with libvirt, it will automatically create bridge device virbr0, and tap device vnet0 which represents VM guest nic (and of course vnet0 is attached to ...
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94 views

Can KVM run on top of host OS?

I was interested in experimenting with Xen until I discovered that it has to be installed bare metal. Hence, if I have a Linux machine and want to use it to run a Xen hypervisor, I have to install the ...
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CentOS 7 how to set guest port to jumbo packet automatically

I'm running libvirt on CentOS7. I have an internal virtual bridge setup. Only the guest virtual ports are members of the virtual bridge, and no physical ports are members of the virtual bridge. By ...
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kvm-qemu debian 7 pci passthrough Digium Wildcard TDM410 AMD M5A97

I am attempting to run a Digium TDM410 PCI card in a Debian 7 KVM Virtual machine. So I can have it connect to my analog phone lines 4 FXO and answer calls through my Asterisk PBX phone system I am ...
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touchscreen passthrough for windows 8.1 qemu slave

I have a windows 8.1 vm running via kvm/qemu on an ubuntu 14.04 touchscreen laptop host. I can pass use my touchscreen as a regular mouse pointer if i pass through -usb -usbdevice tablet in the qemu ...
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vga-passthrough with kvm/qemu on optimus-capable laptop

i have an asus n550jv laptop with the following output from lspci -nn | grep "VGA|3D": 00:02.0 VGA compatible controller [0300]: Intel Corporation 4th Gen Core Processor Integrated Graphics ...
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How can I have different ip address on qemu vm with wireless host machine?

Because wireless doesn't support network bridge, I can't use bridged networking like virtualbox do. I'm running on arch linux with NetworkManager managing connection. Almost every possible way that I ...
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Linux (Mint 17.1) Video card's (R9 270x) sound is claimed by pci stub but the GPU isn't

So I'm trying to setup a gaming VM with on Linux Mint via KVM and VFIO. I've added the ID's of both the sound and the actual GPU but only the sound is getting claimed by stub. When I run dmesg | grep ...
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106 views

Mount or extract data from LVM partiiton inside of a RAW IMG File?

I have a raw disk .img file (running file indicates that it is a "DOS/MBR boot sector" file). Running mmls produces the following output: DOS Partition Table Offset Sector: 0 Units are in 512-byte ...
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(Virtual Machine) KVM/QEMU Distributed Resources

How do large VM hosting establishments offer Terabytes of RAM? Do they just use really large SWAP files? (over a Network FS of some type)? Or is it that they really have hosts/machines/computers ...
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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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213 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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163 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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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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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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477 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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OSX + X11 + KVM keyboard mapping

I'm ssh -Xing from my macbook air into a remote linux machine, on which I'm running virtual machines with kvm. Somewhere along the way, something is lost--it says I can press ctrl+alt to release the ...
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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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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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587 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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Centos install using KVM stuck on trying to access install.img

Greeting Folks, I am trying to install Guest or DOMU on a remote server and every time I try is get stuck at Retrieving /install.img. I believe its a network setting but am not entrely sure. Here is ...
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151 views

Getting an already installed Android x86 partition to run on KVM

I have Android installed on sda3, and it boots fine when loaded from Grub with the following commands: set root='(hd0,3)' search --no-floppy --fs-uuid --set=root 977083a6-5762-4064-b860-39429b9e0cf8 ...
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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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121 views

Correct location to configure a bridge using iproute2

I'm setting up a server for KVM virtualization and having a play with linux networking while I'm at it. Initially I'm aiming for a very simple bridged network set up where eth0 is enslaved to the ...
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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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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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176 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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338 views

is 3d acceleration possible in a win7 kvm guest? (host is debian 7)

I wonder if I can setup a windows 7 (64bit) kvm guest. I have only found some links for 3d acceleration in virtualbox guests, but nothing for KVM. Note that the host is a headless debian server and ...
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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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Wrong modification times when saving on Samba share

I have a kvm virtual machine with Windows 8.1 with main purpose for Word/Excel and a bit of PowerPoint. Sometimes I save the virtual machine state and when turning it on again, the date and time of it ...