KVM (for Kernel-based Virtual Machine) is a full virtualization solution for Linux on x86 hardware containing virtualization extensions (Intel VT or AMD-V). It consists of a loadable kernel module, kvm.ko, that provides the core virtualization infrastructure and a processor specific module, ...

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How can I tell Linux to ignore disk partitions it's already discovered?

I'm running libvirt with QEMU/KVM and I have disk images for the VMs in LVM logical volumes. Naturally, many of the guest VMs use LVM for their disks, too. I ran partprobe on my hypervisor and it ...
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17 views

auto assign ip address to httpd.conf

I am building a cluster of servers in which new virtual machines will spin up as resources are needed. Is it possible in the apache config file to use a variable that will detect the servers ip ...
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1answer
18 views

Ovirt Manual Start Up

Interesting question: Was just interesting. In a worse case scenario you would not be able to start up a VM. Anyone else have a method to start a VM manually using CLI? Of the oVirt Manager GUI ...
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20 views

novnc apache2 reverse proxy code 1006

I just installed webvirtmgr but the noVNC console is not working (code 1006). The detailed error of the google chrome console is: [blocked] The page at ...
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41 views

Infiniband + KVM

this question is a copy from stackoverflow, as I was told, my question would fit here better. Despite quite a long search for days, I could not find any good information about the following - though ...
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1answer
31 views

How can I change Qemu KVM machine architecture from 440fx to q35 with virsh edit or virt-manager

Still trying to get GPU passthrough working and decided to change machine type from older 440fx to q35 ie pc-q35 but if I do virsh edit on the config it refuse to save saying "PCI Bridges not ...
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1answer
24 views

Debian Jessie Qemu KVM GPU Passthrough to Windows Virtual Machine guest Virt-Manager error Bus PCI not found

I'm having problems with Virt-Manager not wanting to boot a VM and giving error: Error starting domain: internal error: process exited while connecting to monitor: char device redirected to ...
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13 views

LXC breaks IP-connectivity

I have i Libvirt/KVM-host with two physical ethernet cards. I use two bridges for these cards, one bridge for a local DHCP-based network and one for static public adresses. I use the first bridge to ...
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33 views

libvirt / kvm guests take very long time to start after host reboot

Host system is CentOS 6.5 x86_64. I have setup an Ubuntu guest by following this wiki. The guest works, but: if I reboot the host, it takes a very long time (about 30 minutes on the last reboot) ...
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11 views

KVM Spice Problems on Jessie

I followed this tutorial to setup SPICE with libvirt/kvm for the sole purpose of to be able to copy text between the VM and my host machine (which is not a problem for vmware, virtualbox etc). ...
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28 views

Convert VHD to use on QEMU KVM

I try to convert a .vhd file (VPC) and get this error. I tried different .vhd files without success. I tried also with a fresh exported VHD with disk2vhd and backup Hyper-V .vhd. qemu-img convert -f ...
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20 views

Convert KVM VM with multiple drives to Hyper-V (or somehow clone into a single drive system?)

I know this is going to sound weird. I have a VM running under KVM on Centos 6 that ran out of disk space, so 2 qcow2 drives were added, with one of them extending the vg_svn-lv_root LVM VG, and the ...
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1answer
37 views

live migration of a virtual machine to a different machine

I am trying to do live-migration using KVM (libvirt). VM is called host1 and dest. IP address is 10.81.1.9. However, running the following command gives me an error that I am not sure what this ...
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21 views

Enable SDL for KVM under CentOS 7

I'm trying to set up a VM in CentOS 7 with an SDL display, but every time I try to run it, I get the following error: Error starting domain: internal error: process exited while connecting to ...
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21 views

Live migrate a libvirt/kvm virtual machine with both local and shared storage

I want to use both local (for better performance where it matters) and shared (for big slow disks) storage for a VM. Is it possible to live migrate such a VM? If the storage was pure local, the ...
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2answers
42 views

ssh into virtual machine (or direct VM console access)

I am trying to launch multiple VMs and need to have a direct console access (whether through ssh etc.) So, far I can launch multiple VMs using virsh/KVM tools. How I do it is that I just have one ...
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1answer
51 views

How To Monitor And Alert For KVM Hypervisors

We have an environment where we are currently monitoring ~50 VM hosts running esxi. We easily get alerts for hardware events and exceeding performance thresholds via vcenter. We're planning on ...
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69 views

kvm error: Cannot find suitable CPU model for given data

I'm getting the error when trying to create a VM in my Debian Jessie install. It's new, suggesting a bug, but would like to see if there is a fix first. Some info: cpuinfo: processor : 7 ...
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83 views

Virtualization-(Cluster) with KVM/libvirt on top of a FC SAN

I'd like to set up a 2-node HA-Cluster based on Ubuntu and KVM running about 30 VM's. Both nodes are connected to a HP MSA(5TB) via Fibre Channel. Multipathing's already working and the nodes are able ...
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2answers
108 views

How do I enable KVM device passthrough in Linux?

I have an MSI-GD65 Gaming motherboard and an Intel i7 4790. VT-D is enabled in the CPU Features section of the bios. I'm running Ubuntu 14.04.1 LTS and when I try and detach a device, I get the ...
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1answer
32 views

Access pty login prompt in VM

I have created a VM with virt-install, using as install media a Ubuntu 14.04.01 LTS server ISO. During the installation phase I was connected to the VM via the graphical console. Now I have the VM ...
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1answer
19 views

Connect to the text console of a running VM

I have a running VM with vnc disabled. This is the command running it: qemu-system-x86_64 -enable-kvm -name scratch -S -machine pc-i440fx-trusty,accel=kvm,usb=off -m 512 -realtime mlock=off -smp ...
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1answer
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ERROR Host does not support virtualization type 'hvm

hello I have a problem in installing vm on KVM using libvirt(virsh install -) sudo virt-install -n ccnx1 -r 512 --vcpus=1 --os-type=linux --accelerate --nographics -v -l ...
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1answer
32 views

ERROR Host does not support virtualization type 'hvm'

I have a problem in installing vm on KVM using libvirt virsh install sudo virt-install -n ccnx1 -r 512 --vcpus=1 --os-type=linux --accelerate --nographics -v -l ~/ubuntu-12.04.5-alternate-i386.iso ...
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1answer
52 views

Is there a way to connect VMWare Workstation / Fusion to non-esx Libvirtd-managed virtual machines?

I'm using KVM virtual machines managed through libvirtd server-side for most of my projects. On my desktop however, I'm using VMWare Fusion Professional which, just like its VMWare Workstation cousin, ...
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1answer
137 views

OpenVPN connects and access to ip works but not url in browser

I have been struggling for 2 days to setup Openvpn access to one of my servers but something doesn't work. First about my setup: My server is Debian 6 installed on vps on kvm environment. I have ...
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31 views

Adding nic to virtual machine via kvm not showing up inside machine

I'm trying to add a new nic (eth1) to a virtual machine that I have set up using virt-manager. I can use Virt-manager to add the hardware but when the machine is booted no new cards show up. What have ...
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1answer
100 views

windows 7 as kvm guest installation with virtio drivers - detected virtio scsi disk shows wrong capacity

I am trying to install windows 7 64bit as a kvm guest. I read here that I should install the virtio scsi driver during installation. I use virt-install to start my installation from the command line ...
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38 views

Ubuntu KVM Guests going Read Only

I have three servers, all running KVM with 4-5 Ubuntu Server guests: generic PC, single SATA HDD, Ubuntu 14.04 PowerEdge 2950 8GB RAM, 2x SAS 10k in RAID1, Ubuntu 12.04 PowerEdge 2950 8GB RAM, 2x ...
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2answers
62 views

unable to start the installation of a kvm win7 guest

I am using this command (using virt-install on a debian 7 host) to start the installation of windows7 guest OS. I have assembled the following from a plethora of sites virt-install --connect ...
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2answers
68 views

Guest networking not working on Debian Jessie Host server KVM with br0 bridged network

GUESTS networking not working at all. In other words guest can not ping host or lan gateway. I have br0 bridge already created, also brctl show that vnet0 was properly added by KVM to br0 on guest ...
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1answer
73 views

Kernel panic installing CentOS7 guest on CentOS7 host

I'm trying to install a CentOS 7 guest as a guest on CentOS 7 KVM host but keep getting a Kernel panic, and it seems to happen at the exact same spot every time. I've even tried installing a CentOS 6 ...
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36 views

KVM virtual IP address not working on HOST, works on GUEST

I have a setup composed of the following: -> A HOST running KVM with the following network configs: # The loopback network interface auto lo iface lo inet loopback # The primary network interface ...
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54 views

Proxmox OpenVZ and KVM talking on one host private IP's

I have a proxmox server running version 3.2-132, here's the relevant version information: root@sol:~# pveversion -v proxmox-ve-2.6.32: 3.2-132 (running kernel: 2.6.32-31-pve) pve-manager: 3.2-4 ...
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1answer
116 views

KVM Windows 7 graphics performance using remote desktop

I'm have a Windows 7 installed as a KVM guest on Ubuntu Server 14.04 (headless server). Virtio driver is installed (for system disk). Graphics performance is bad due to lack of graphics driver - there ...
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3answers
115 views

nested virtualization in kvm

I am looking for some advice on configuring KVM on Red Hat 6.5 so that it is able to run Red Hat Hypervisor as a virtual guest. When I am running Red Hat Virtialization Hypervisor as KVM guest then ...
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1answer
43 views

Restarting the networking on the HOST makes GUEST lose connection

I am probably missing something but have a KVM virtualized HOST/GUEST setup. The GUEST is using a bridge (br0) on the HOST for internet connectivity. When I make a "/etc/init.d/networking stop ; ...
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23 views

KVM Image consumes more space on disk than what du shows

I have a kvm image which by looking at it with du -sh consumes 13GB (12980888) but in reality it consumes 42GB. Found that out the hard way when I scped it and after 18GB it was still copying ...
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30 views

Find cause of unresponsive Ubuntu 14.04 KVM host

I'm hoping someone can point me in the right direction on a very puzzling problem. I've got an older server running Ubuntu 14.04 that serves as a virtual host for some small virtual (KVM) machines. ...
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69 views

KVM - Graphics card passthrough

I am trying to passthrough a graphics card to a KVM guest but have been unsuccessful. The graphics cards has been attached and it does appear that the guest is aware of the card, I can see the kernel ...
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1answer
348 views

KVM/libvirt: How to configure static guest IP addresses on the virtualisation host

What I'd like to do is to set the guests' network configuration (IP address, subnet, gateway, broadcast address) from the host system. The used network setup is in bridge mode. How can I configure the ...
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2answers
38 views

Cut'n'paste between X11 Desktop and the virt-manager VNC graphical console of a Win7 VM guest on a Server

I have a licensed copy of MicroSoft Windows 7 professional installed and running as guest on my Linux server running qemu-kvm. This works just fine. But I was unable to figure out how to ...
2
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0answers
46 views

“Nosy Neighbor” and the CFQ scheduler

I'm trying to understand how does using CFQ affects the "Nosy Neighbor" problem. I'll ask it a bit naively, can a "Nosy Neighbor" even exist when using CFQ? Isn't that CFQ should make sure all ...
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32 views

openvpn peers can ping network but not reverse

In a nutshell, I have two libvirt/kvm hosts on which I have virtual machines running. The hosting company that these machines are with cannot provide any sort of virtual network between these ...
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1answer
72 views

KVM Bridge with external ip with windows server 2012 guest

I'm currently setting up a guest windows server with kvm/qemu on a unbuntu 14.04 host and a bridged network connection to allow the server to be exposed over the internet. I'm trying to give my ...
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44 views

Libvirt/KVM vm - No network connectivity

I have installed devstack (OpenStacks development platform) on a physical ubuntu 14.04 host and I have been trying to follow the tutorials for manually creating an image. I have tried for Ubuntu and ...
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0answers
119 views

Weird Phusion+nginx spawning delay error

We are trying to migrate an application written on REE from cloud provider A to cloud provider B. The application code, VM specs and operating systems are the same. The basic difference is that cloud ...
2
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1answer
173 views

Windows guest on KVM/Qemu suffers horrible key lag

Host OS is Arch Linux with the following versions:- qemu 2.1.0-2 libvirt 1.2.7-1 linux 3.15.8-1 Guest OS is Windows 7 64-bit. This problem did not exist when I first created this VM and started ...
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1answer
52 views

KVM - Changing Memory of Guests Live

I have a KVM guest that I would like to dynamically change the memory allocation of. At the moment, to change the memory of the guest, I have to run: sudo virsh edit $GUEST_DOMAIN Then change the ...
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1answer
150 views

How to speed up QEMU on Windows host?

We want to run our Ubuntu 64bit web server virtualized/emulated on a Windows 64bit host. Intended use is to distribute the VM to customers who might not have "elevated" or "admin" rights on the ...