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

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Qemu/KVM, windows guest password prompt

Ubuntu 16.04 Qemu/KVM Windows 8.1 guest SSH from remote host into hypervisor, run virt-manager. Get prompted for creds: user1@hypervisor, authenticate successfully. Open guest, get prompted for ...
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Ubuntu 16.04, drive path changed on its own [duplicate]

So yesterday I had a grub issue that required me to comment out the other two drive sin my fstab that get mounted. 1. an ssd that houses my qcow2 vm. 2. a 1tb seagate So all I had listed was / and ...
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Qemu/KVM assign usb input devices to VM

So I have an Ubuntu 16.04 host running Qemu/KVM and a Windows 8.1 guest. I have successfully gotten the guest to use both a dedicated video card and dedicate monitor.. however I cannot figure out the ...
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Server OS with graphics to run on kvm (postgres + pgadmin, java, teamvier) [on hold]

Could you please recommend me a distribution or setup regarding the following: ressource friendly to run virtually on kvm graphic is need for remote administration (teamviewer) good postgres ...
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13 views

Execute command inside guest vm Libvirt

Is it possible to execute a command for eg:iostat inside a guest VM using libvirt or virsh .I want to find out IOPS for a guest vm but with libvirt java api I am not able to get the IOPS of a vm ...
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Remove devstack dependencies Ununtu 14.04 (32 Bit Dell Lattitude 5500)

I installed devstack in my old laptop. After installation when I try to access OpenStack, my laptop became very slow. Then I realized, that laptop had only 2 GB RAM. I ran unstack.sh and delete ...
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Performance issues running Linux Mint on qemu-kvm - maybe run in textmode and use remote graphics for administration?

we are running virtual servers on kvm-qemu, using debian wheezy as a host system. Unfortunately one server is based on Linux Mint 17.3. One big issue is the performance of Linux Mint based on kvm. ...
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21 views

KVM on Crouton chroot?

I've enabled Vt-x support in BIOS, and have been trying to get KVM on my chroot for a few days now. I lost my chroot last night (got it into an unbootable state) trying and had to build a new one. ...
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Select graphics card

Is there a way too to select a primary graphics other than onboard graphics. I have two different dedicated graphics cards in my machine, one GT640 and a GTX970. I am trying to set up the machine to ...
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Is it possible to setup a bridge configuration where only the host can access a VM, but not the other way around and no VM->VM?

I have a KVM hypervisor set up with several VMs. A docker instance runs in each of them (for security purposes the containers shouldn't run on bare metal next to each other). Is it possible to ...
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Does 32-Bit OS need hardware virtualization to run o KVM?

I have a 64-bit CPU that doesn't support virtualization. My understanding is Whonix is a 32 bit OS. Will I be able to run Whonix on KVM?
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Does Linux perform buffering twice when hosting a VM?

I ran a KVM VM on my CentOS host and found that after performing a HDD-intensive operation, it used all of the host's memory I assigned to it. However, free on the guest suggests that the memory's ...
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17 views

hid_generic module not loading

I have two Debian systems connected to a KVM switch. On one system the KVM is recognized and the hid_generic module loaded without any issue, on the other one lsusb show the device but the hid_generic ...
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29 views

Bridging two virtual machines on difference bridges

I have two VMs: vm1 & vm2. The host and VMs both are Ubuntu 14.04 LTS. Each VM "connects" to a bridge which connects to a virtual ethernet interface and end up at eth0 i.e. vm1 (192.168.0.23) ...
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24 views

CentOS 7, KVM.. auth failed: no agent available

So like the subject suggests.. CentOS 7.2 minimal + KVM install. I had the VMM working via X11Forwarding last night. After a reboot though I get this: authentication failed: no agent is available ...
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91 views

GPU Passthrough with qemu - no video output (AMD 7970)

I am trying to setup GPU passthrough on Arch. I followed the PCI passthrough via OVMF wiki along with some other resources online. I substituted a few steps as needed, for example I am using ...
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55 views

KVM virtualization for CentOS 7

I am having an absolute devil of a time with KVM. It seems every HOWTO out there offers a different list of packages, and I've installed them all: [me@tarantula ~]$ rpm -qa | egrep 'kvm|qemu|virt' ...
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How to run kvm virtual machine with console? [duplicate]

When i run virsh start vm_name it boots in background. I want to access the grub while vm is booting. Is this possible to run virsh start vm_name with some kind of console? (I am using RHEL 6.5 on ...
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215 views

Is it possible to install KVM on bare metal?

I have gone through many sites and tutorials for KVM installation and every tutorial says "install KVM under XYZ OS". KVM is a type 1 (bare metal) hypervisor. So shouldn't KVM be installed directly ...
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39 views

KVM bridged interfaces not going up - inet, inet6 , bridge

I am setting up KVM host which will have multiple virtual machines visible from the outside with a similar /etc/network/interfaces config to this one # The loopback network interface auto lo iface ...
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20 views

KVM Networking Topology

I would like to set up a network on my Server where I run KVM as a hypervisor. The Network will be used for a distributed Jenkins setup. The goal topology is the following: One machine (Jenkins ...
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31 views

scp to a KVM guest behind NAT

I have a KVM guest running on a server accessing it via virt-manager. I'm running the guest from my_pc. server has a public IP address and both my_pc and guest can ssh it. guest has a 168.192.x.x IP ...
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25 views

Trouble with Whonix-installation (Debian)

I've been trying to install Whonix on my Debian Jessie-VPS for days now, but keep getting following message: "no supported architecture for os type 'hvm'". I've been following the the official guide ...
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43 views

virt-manager and spice throw ssh

I have KVM host and few VMs with SPICE server, binding to localhost. I can connect to VMs remotely with virt-viewer --connect qemu+ssh://user@host/system vmname Also I use virt-manager with SSH, ...
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59 views

Unable to boot a kvm guest via qemu/kvm-tools

I am using ARM Foundation Model to emulate a arm-v8 environment(I need both TrustZone and KVM), and I run a kvm-enabled linux on it as the Host OS, the kernel version is 3.14.0(I clone it following ...
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88 views

PCI Passthrough KVM with vfio-pci giving EINVAL on PCI Probe

I am attempting to attach PCIe devices in passthrough to my KVM domain. I have two devices in one IOMMU group (#28): 03:00.0 PCI bridge: Texas Instruments XIO2001 PCI Express-to-PCI Bridge 04:00.0 ...
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Problem installing Fedora 23 in VM using KVM on Linux Mint 17.2

I'm unable to install Fedora-Live-Workstation-x86_64-23-10.iso into a QEMU2 VM using virt-manager on Linux Mint 17.2. I've verified that the SHA256 checksum on the ISO is correct, and I can install a ...
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35 views

How do I specify an alternative bridge interface (not br0) when using qemu-bridge-helper

By following the instructions found at http://wiki.qemu.org/Features/HelperNetworking I can configure qemu with qemu-bridge-helper, however, I can't figure out how to pass a bridging interface option ...
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38 views

How to check if 'Per-node memory binding' is supported in any libvirt version?

I am using kvm and getting an error: unsupported configuration: Per-node memory binding is not supported with this QEMU I have the #virsh version: Compiled against library: libvirt 1.2.9 Using ...
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16 views

How do I properly configure networking for a KVM virtual machine?

I have a remote dedicated server on which I have installed KVM. When trying to create my first virtual machine I am unable to ssh to the machine. I assumed that I needed another ip address so I ...
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How to connect two VMs with different IP ranges to access each other?

Using KVM I have created four VMs, I have two public Ip addresses for my VMs, I know that I can assign these IPs to two of the VMs and connect them to internet by bridging my host's physical interface ...
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94 views

KVM network packet loss to guest

I am running a server with Debian 8.3, uname output Linux x 3.16.0-4-amd64 #1 SMP Debian 3.16.7-ckt20-1+deb8u3 (2016-01-17) x86_64 GNU/Linux I am using KVM to run a virtual machine with CentOS ...
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53 views

Does the O_DIRECT flag bypass the Linux page cache when accessing block devices too?

I am running a lot of KVM virtual machines, which open the hard disk image with the O_DIRECT flag. I understand, according to the open() man page, that using O_DIRECT will try to bypass the Linux ...
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How can I store files in the mounted shared folder?

I am running a Fedora Workstation virtual machine on an Ubuntu host. I created a folder /home/cl/share in the guest and mounted the shared folder /media/cl/system/virtual/share as root following the ...
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58 views

How to access KVM windows guest bios

How to access KVM windows guest bios: As I want to check guest bios virtuliazation options to enable nested virtuliazation, like vm inside vm.
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Issue with kvm when trying to install kali

I am wondering why when I am trying to install Kali Linux on kvm, I am facing the next issue: Unable to complete install: 'internal error: process exited while connecting to monitor: ...
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52 views

QEMU kernel panic to serial port

I'm working with kernel 2.6.13.1 on Debian 6 with QEMU/KVM for a class. The kernel, once installed, panics on boot. The curses interface to qemu doesn't seem to allow scrollback to view the entire ...
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101 views

Should I use KVM or Xen ? What are the main differences? [closed]

I've spent a few hours trying to understand the differences between KVM and Xen without much succes. So both are Type 1 Hypervisors with comparable performances (source) and I don't understand what ...
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49 views

Qemu error: internal error: QEMU / QMP failed: qemu-system-x86_64: PCI bus not available for hda

I get the error below when trying to start my vm with serenity ~ # virsh start winxp-gaming error:failed to start domain winxp-gaming error:internal error: QEMU/ QMP failed: qemu-system-x86_64: PCI ...
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58 views

Using Device mapper thin provisioning on loop devices

I have several KVM raw files that are read only (about 100gb). I am adding these raw files as loopback devices. I then create a snap file to allow the VM to have read/write access to its disk. This ...
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120 views

Can I enable cephx authentication using a pool in qemu/kvm?

(CentOS 7, Ceph Incunabulus, everything patched up to date) Background I've got a working converged Ceph/qemu/kvm cluster with cephx enabled for authentication. I'm trying to use this to store block ...
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no arp entries for vnet

I have multiple kvm hypervisors (HV) which runs bunch of virtual machines (VM). Every HV has br0 and every VM is attached to it with its vnet interface. I noticed that one HV at arp -a shows me 2 ...
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118 views

Installing qemu-kvm 2.5 on Centos 7

Are there any repos out there that carry the most up-to-date version of qemu-kvm as well as dependencies? I ask because the newest qemu-system has a HUGE list of dependencies and I would like to not ...
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kvm custom scripts for automation of pci device attachment

Can anyone help me in two things: my kvm server is in my lan. How to use virsh to create and manage my guest vm in my host, can any one write me a shell script that when the device id is given ...
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69 views

How to disable QEMU guest access to host ports

I'm using the following command to run a QEMU VM: qemu-system-x86_64 -enable-kvm -m 1024 -smp 2 -hda disk.qcow2 By default, the guest OS has internet access, but can also access open ports on the ...
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GRUB Legacy complaining about filesystem being unknown?

I have several VM's in an OpenStack cluster (KVM) and when they get built from an image that had say a single 5GB partition they too will have this same HDD geometry configured. I've found several ...
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68 views

Virt-manager Permission Denied when accessing NFS pool

I'm currently having this error when I'm trying to install a Virtual Machine on my NFS share. i've added my NFS share (coming from FreeNAS) to a Storage Pool on the virt-manager Another issue is ...
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125 views

Is it possible to pass USB DVD drive to KVM (QEMU) virtual machine on Ubuntu?

I've got a KVM host on Ubuntu 15.10 Server. I'm fairly new at it so I'm managing it via an Ubuntu 15.10 Desktop VM running on itself and accessing the host via Virtual Machine Manager. That works ...
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145 views

Debian 8 install in QEMU/KVM guest failing due to ext4-fs / “read only filesystem” errors

I am on Debian 8.2 and trying to install a Debian 8.2 QEMU/KVM guest. I created a virtual disk image file and booted into the Debian installer ISO with the following commands: jesse@deb:~/vms$ ...
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Where are macvtap settings on rhel 7

I am creating a virtual machine in KVM on Red Hat Enterprise Linux 7. I have created two bridges and connected two interfaces which are on the physical hardware to the bridges. How can I use these ...