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

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How can i make incremental backup?

I have a linux based HOST system with KVM. And a GUEST system using Windows Server 2012R2 on a lvm partition. How i can make an incremental backup of this lvm set? Or better yet, how can I make a ...
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24 views

Virtual Machine failover with KVM [on hold]

I'm trying failover of VM's in KVM Linux as a learning program. Scenario: 2 HV Bare metal (2 physical servers) having CentOS with KVM. On both the HV there are multiple web-server with guest ...
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17 views

Moving VirtualBox disks to cloud services

Currently, the official way of deploying a custom distribution or different operating system on Linode is installing it locally in a virtual machine and copying the resulting disk verbatim to a Linode ...
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1answer
14 views

Proxmox hook for VMs

We have Proxmox installation. We want to execute a command after new VM was added. It is required for QEMU port redirection since setting redir option is not avaialble on GUI: qm set 102 -args "--...
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12 views

Input/output error when copying Qemu raw image

I'm trying to clone a VM on a CentOS 6 server using virt-clone, but every time I run it I get: ERROR failed reading from file '/var/lib/libvirt/images/myimage.img' : Input/output error I've also ...
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18 views

KVM snapshot slow booting after some time

I'm using Red Hat system and using KVM for virtual machines. Currently I have 8 snapshots in my virtual machine called "Win7", where each snapshot is built based on the snapshot before to fix some ...
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41 views

How to migrate all the memory pages of a process from one NUMA node to another NUMA node?

In Linux, I want to migrate the memory pages of a KVM virtual machine from one NUMA node to another NUMA node on runtime. But I cannot find any interfaces to do that in the KVM hypervisor or using the ...
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1answer
39 views

How to make the Windows guest machine use more the one CPU?

I do believe this question has been posted before not only here but on Linux forums as well. However I could not implement the solutions, I am probably missing something obvious. KVM Host: Fedora 23 ...
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24 views

Assign Static IP to KVM CentOS Guest.

I am attempting to set up a CentOS(7) guest on my Linux Mint(17.3) system using KVM. My Mint host has a static IP (10.10.16.247) configured already and is currently fully network functional.I have a ...
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1answer
95 views

Accessing Console Of Ubuntu 16.04 KVM Guest

When I added Debian 8 to my KVM management tool, I found that I could not access the console unless I added console=ttyS0 to the grub boot configuration. It wasn't great but it worked. I am in the ...
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1answer
42 views

How to avoid the difference in options that were used for creation of ext4 partitions on different Linux distro?

I have some set of scripts that create qcow2 file with grub legacy (0.97) with special patch to boot from ext4 and ext4 file system for '/'. When I run those scripts on Ubuntu 12.04/14.04 the VMs ...
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37 views

Use of virtio on QEMU without KVM

I want to write a simple driver for use inside a QEMU virtual machine, which will be communicating with the host through a respective backend special virtual device. The said driver and backend ...
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78 views

GPU pass-through KVM Fedora 23

I am attempting to pass a GPU to a windows 10 VM running on a Fedora 23 host: Virt-manager Host: Fedora 23 Guest: Windows 10 64 bit guest UEFI OVMF GPU: R7 AMD Radon 250 is the GPU that I am ...
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21 views

Firewalld forwarding between zones not working

I have a centos 7 kvm hypervisor running multiple VMs that are configured to use NAT networking. These VMs run their services, of which ssh is the most important for administration purposes. I would ...
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1answer
89 views

Android-x86_64 installer does not boot in QEMU/KVM - EFI Shell appears instead

I downloaded Android x86_64 5.1-rc1 as bootable img installation image. I want to install it to a virtual machine running on Ubuntu 16.04 64 bit with UEFI using QEMU/KVM and virt-manager as graphical ...
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1answer
194 views

Arch linux ( kvm/qemu virtualization ) failed to open libiscsi.so.4

I have fallowed the steps from Arch Linux #KVM and #qemu 1) sudo pacman -S then installed libs libvirt libiscsi libaio qemu qemu-arch-extra qemu-block-iscsi qemu-block-rbd qemu-block-gluster ...
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21 views

Which ports to open in ufw for Windows in QEMU

I'm running Windows 7 in QEMU under Debian using bridge-networking. However when i have ufw enabled and start Windows i can not connect to the Internet. As soon as i disable ufw the virtual Windows-...
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45 views

CVE-2016-3710 mitigation in CentOS 7

I have a box running CentOS 7 for KVM virtualization purposes. What is proper steps to mitigate CVE-2016-3710 in my OS? $ rpm -qa --changelog qemu | grep CVE-2016-3710 shows nothing. Current ...
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196 views

Able to ping my host but getting no route to host

I have a elasticsearch service running on MY_HOST_IP(10.x.x.xx) and port 9200. I am able to ping 10.x.x.xx from my VM, but when I try to connect elasticsearch it gives me : no route to host ...
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18 views

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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136 views

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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68 views

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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23 views

UUID of LUKS changes when cloned

I am trying to install Centos 7 (under LUKS) on a virtual machine in Fedora 23 using virt-manager and after that to clone that image to multiple USB drives. The problem is that the virtual machine ...
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1answer
53 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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38 views

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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42 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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51 views

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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16 views

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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2answers
25 views

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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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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35 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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91 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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162 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 systemd-...
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1answer
96 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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3answers
766 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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1answer
60 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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1answer
27 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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45 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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30 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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86 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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1answer
95 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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186 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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108 views

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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42 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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70 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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19 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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1answer
64 views

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 ...