KVM is the Kernel Virtual Machine, a virtualization hypervisor built into the Linux kernel.

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Error initializaing USB support: Other error [-99]

I am trying to connect to a virtual machine using KVM on Scientific Linux 7. Scientific Linux is running on vmware. When I attempt to connect to the virtual machine I get an error. How do I proceed ...
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651 views

Can (and how) KVM use NTFS storage?

Using SL6.4, I am trying to create a new KVM virtual machine using virt-manager. When defining storage at default pool, it boots up OK. However, when trying to use storage located on external NTFS ...
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How to run Windows with GPU virtualization?

A year ago I switched to Ubuntu for my primary OS, which has worked out just fine. Every now and then I want to play computer games and while using Wine often works, I can't get all of the games that ...
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One host, two virtual machines that cannot ping each other. How to solve

We have Virtual Machines operating within the KVM environment. We setup one as a dev server running Apache etc., and the other as a Windows development environment. The two environments are setup ...
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1answer
7 views

QEMU guest agent problems - hosts and guests in different versions

We have multiple hosts with multiple KVMs each. Some hosts run with Ubuntu 12.04 LTS and newer ones with 14.04 LTS. The guests also have different versions like 12.04 LTS and 14.04 LTS. I want to ...
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QEMU Guest Agent for Ubuntu 12.04 LTS

I've been looking for the QEMU Guest Agent for Ubuntu 12.04 LTS. It seems like the Guest Agent is included in the official Repository from Ubuntu 14.04 and up ...
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27 views

How to differentiate 2 NICs with the same PCI address

I am running Fedora 22, and have a GPU that I passthrough to a KVM guest. I accomplished this by adding pci-stub.ids=<pci id 2>,<pci id 2> to my Grub boot option. The two PCI IDs I'm using ...
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3answers
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How to migrate an IDE VM to a virtio VM?

On my KMS host I installed a windows server 2012 guest a few months ago. The VM runs raw using IDE (HDD). I would like to improve the performance by using virtio. I performed these actions: ...
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606 views

Nested virtualization: run RHEVH inside KVM

I have laptop with 16GB RAM, trying to install Red Hat Enterprise Virtualization Hypervizor 3.3 on Virtual Machine Manager (KVM) based Guest, but it gives error "Virtualization Hardware not found" ? ...
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715 views

Configuring bridge network in kvm (debian wheezy 7.2)

I am desperately trying to run untangle 10 as a guest in kvm. My host system is debian 7.2 My problem is that I am unable to configure bridges/(virtual)NICS which are successfully identified by ...
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939 views

KVM Guest installation

After ran below command virt-install --name=vm01 --disk path=/var/lib/libvirt/images/vm01.img,size=10 --ram=512 --os-type=linux --os-variant=rhel6 --network bridge:br0 --nographics ...
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51 views

how to create custom vagrant box from libvirt/kvm instance ?

there is many resource on Internet to create custom vagrant box from VirtualBox instance but i want to know direct method to create custom vagrant box directly from kvm/libvirt instance . please ...
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58 views

can't launch android emulator while logged in over vnc?

i have a headless box running bbqlinux that i'm trying to use as an android-studio development box. when i go to launch an .avd in the emulator, i receive this error: Cannot launch AVD in emulator ...
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1answer
70 views

Is it possible to read PVclock from user space?

Is it possible to read clocksource xen or kvmclock using some user space tool? Referring to /sys/devices/system/clocksource/clocksource0/current_clocksource. Reading the actual value of the pvclock. ...
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2k views

kvm virtual manager connection failed

I installed kvm package in the centos7 i am getting this problem how to solve this. full error is here Unable to connect to libvirt. no connection driver available for qemu:///system Libvirt URI ...
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1answer
48 views

Start a kvm virtual machine fullscreen on boot

How can I start a Windows virtual machine in kvm on boot in fullscreen mode, in a way that the fact that Windows is running virtualized is completely hidden from the windows user ? Basically after ...
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1answer
1k views

Proxmox Master Node crashes

I've inadvertently discovered a Proxmox bug. I run a personal cluster of 4 nodes (a technology lab for giggles and gags). Each node has a Dell Perc 5i and 4 HDDs in RAID 10. The standard Proxmox ...
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1answer
24 views

KVM host, add LV to guest

I have a KVM host with a software RAID 10 array. The software RAID 10 array is a PV on the host and there's a single VG. I have a couple of LVs used at the host level (a datastore for KVM guest .img ...
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1answer
620 views

KVM to Ovirt VM migration

I installed ovirt on a machine that was already hosting KVM virtual machines. I am now trying to migrate those VMs over to RHEV format, but I am receiving SASL authentication errors using virt-v2v. I ...
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18 views

KVM and peripheral devices

How does KVM work with peripheral devices? Are devices emulated in user space or in kernel space through the device driver? The host and guest operation system cannot claim both a device, and how ...
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1answer
1k views

How to migrate from Proxmox to VMWare?

I am wondering how it is possible to migrate a full hardware VM in Proxmox (qemu) to a full hardware VM in VMWare (vmdk). I have been searching all over the place, and it seems almost impossible to ...
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8 views

Debian Kickstart Files Failing To Download

I have found that if I try to host my kickstart files on github and pass the raw url to virt-install, such as below, it will fail. ...
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3k views

How to know if a process is attached to a tap interface?

I sometimes come upon machine with tap interfaces (eg, when KVM is running). How can I know which process is attached to the TAP interface?
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Binding/unbinding GPU between host OS and pci stub while host OS is running

Using a Debian 8 host, I'm interested in setting up a Windows VM guest which get's direct access to my dedicated/discrete graphics card, to see what sort of performance I can get out of it for games ...
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2answers
691 views

Disable KVM Kernel Module while its still in use

In order to run a virtual machine, VirtualBox tells me to disable the KVM kernel module. I googled around and found out that KVM is included in the qemu-*-packages, but none of them is/was installed ...
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VGA passthrough - Code 43 with KVM and libvirt on all AMD hardware

I've set up a system with an R9-270 and an ATI Rage (PCI graphics card, doesn't use radeon driver) on an FX-8320 and an ASRock 970 Extreme3 R2.0 motherboard with the intention of running Debian Wheezy ...
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Clipboard doesn't work in KVM.

I have a RHEL 6 Desktop with a windows KVM. How could I get the clipboard working, just as there is a solution in VirtualBox to share the clipboard between host and guest?
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Qemu overlay image size limit

I created a qemu ubuntu vm. Now I use overlay images as a quick way of creating vm's "on the fly". But what is the size limit for an overlay image? Is it the size of the "base" image? Or can it grow ...
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2k views

Mageia - how do I setup a KVM for Windows gaming?

Okay so I setup a KVM using Virt-Manager, Iset it to 7443 out of 8GB RAM, Got it to emulate my CPU fully, everything worked fine, but I cant get my GPU to unbind from the host to the guest, So is ...
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2answers
543 views

KVM linux guest, 2nd HDD, LVM partition or whole disk

I've got a RAID 10 arrays on a couple of KVM host machines. The RAID 10 array is one big VG. I usually create a small LV for guest disk image storage then the rest of the VG I carve out as LVs to add ...
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1answer
51 views

qemu command line management

I'm interested in qemu, specifically the kvm feature in Linux which is operated through the command line. I see there are a ton of features available for gnome-boxes and libvirt specifically. My ...
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43 views

Debian server management GUI

I have to manage a number of Debian servers (one as the KVM host, and the others as virtual servers for File management, Infrastructure management - DNS, DHCP etc, and finally a Debian based ...
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1answer
68 views

Need help setting up networking for KVM on Gentoo with exit to wifi adaṕter

I am running Gentoo Linux on an AMD64 laptop, and I am having an extremely hard time setting up host networking on KVM. I alreay have KVM, libvirtd, virt-manager, the kernel modules required to get ...
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1answer
418 views

Install VM from command line with virt-install

Disclaimer : I now use virt-manager to create and manage my VM and it is really a life saver. It can be used remotely if the host does not have graphical display. The occurrences of vnc in the ...
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19 views

Kickstart with NFS does not work on static IP on KVM

I am using virt-install to use KVM qemu to launch centos VM. The DVD extracts of centos are hosted on a NFS server. The kick start has the line. network --onboot on --device eth0 --bootproto dhcp ...
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92 views

rtorrent won't start downloading (to 9p shared folder)

i am running rtorrent in a ubuntu-VM. the vm's host is sharing a folder "downloads" with the vm, which is mounted inside the guest by adding the following line to /etc/fstab: downloads ...
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1answer
50 views

enabling vnc after using virt-install

I've created a virtual machine using virt-install with graphics --none. I want to enable vnc. I've tried virsh -c qemu:///system qemu-monitor-command vm171-SC-1 --hmp change vnc :3 but it doesn't ...
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1answer
27 views

Is it possible to allocate slices of disk to a KVM storage pool?

When using virt-manager to create a storage pool it does not give the option to set the size. Instead, it assumes that an entire partition is available to the pool. I would expect this to cause ...
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How to send mouse and keyboard to Virt-Manager guest

I have a Windows guest in virt-manager running headless (no spice server) because video is output through a GPU (pci passthrough). But my question now is how to send the keyboard and mouse to the ...
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113 views

Why is 'steal' time gradually increasing?

I'm tracking CPU usage on a VM on a lightly-loaded host. Everything appears to be functioning normally on all the VMs, but collectd is reporting a gradually increasing 'steal' time: The actual ...
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102 views

Packets drops seen in physical interface while using kvm bridge

In ubuntu kvm hypervisor we are seeing packet drops in the physical interfaces once we create the bridge. Below is the output of ifconfig, br1 Link encap:Ethernet HWaddr xx:xx:xx:xx:xx:xx ...
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2answers
365 views

Debian 8 KVM Guest - Loading initial ramdisk

I have updated my KVM management script for Ubuntu 14.04 KVM hosts to support debian 8 guests. After a manual installation (preseed script does not work yet), I am stuck with the the following message ...
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1answer
131 views

How to send/upload a file from Host OS to guest OS in KVM?(not folder sharing)

I have to make a configuration file available to guest OS running on top of KVM hyper-visor. I have already read about folder sharing options between host and guest in KVM with 'qemu' and 9P virtio ...
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18 views

How to mount a path into a kvm?

I have a Windows machine inside a kvm machine on a Linux system. I would like to mount /home/myuser/Documents into 'c:\Users\myuser\My Document'. How can I make the D: drive be an alias for the ext3 ...
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2answers
100 views

How to connect from home PC to Virtualbox/KVM that hosted on Ubuntu server?

I have an Ubuntu server, it's 3TB HDD space total and 24GB RAM, I want to take 1 little bit of space and RAM to make VPS Windows using VirtualBox or KVM. I want to install Windows Server 2008 on ...
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257 views

Why Debian Jessie is turned off instead of rebooting after installing qemu-kvm?

I'm using a new stable Debian Jessie (minimal installation without DE and standard utilities). First of all, I set 'enabled' for Intel virtualisation in BIOS and installed qemu-kvm as usual: # ...
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1answer
105 views

how to check default cache mode for disk in kvm

KVM/qemu support various types of cache - none, writethrough, writeback. How to check which one is default and is used on system when no cache= is specified? For RHEL6 i found that it's writethrough ...
2
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1answer
231 views

How to access KVM guest console without password?

How can I configure a KVM guest running CentOS to allow passwordless console access from the hypervisor? I want to be able to use the following command to log straight in to the VM from the hypervisor ...
2
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1answer
105 views

Modifying files inside a snapshot (qemu img file)

I have taken a snapshot recently to assist me build VMs quickly with the operating system I desire (through virsh), however, every time I build a VM, I would like to modify few files inside the img ...
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81 views

Is there a way to emulate a wireless card in qemu / kvm?

Is there a way to emulate a wireless card in qemu / kvm? Or is there no point to this? Is it considered just another interface?