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

learn more… | top users | synonyms

2
votes
3answers
291 views

Resizing LVM within a in KVM-based VPS

I have a VPS (based on KVM, not sure which storage technology) for about two years now. It's mainly a learning machine, a utility proxy, or a seldom-used VPN gate, or whatever--no real work, no ...
4
votes
1answer
1k views

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 ...
1
vote
1answer
12 views

libvirtd and filtered ports

I am new to virt-manager. After having configured a virtual network (new interface virbr0) with 2 VMs that should be able to communicate, I discovered that most ports are filtered. For example, the ...
2
votes
4answers
2k views

Run if statement on remote machine

I'm trying to run a set of commands on a remote machine, that includes an if statement. I'm using this to shutdown a list of kvm instances. The first line should be fine, but could be prettier, rest ...
3
votes
1answer
19 views

virt-manager: is it possible to assign specific IP addresses to certains VMs via the virtual DHCP?

using virt-manager quite successfully. I am wondering if it's possible to specify in the virtual DHCP server, that some virtual machines will have a specific IP address (maybe via MAC address ...
3
votes
1answer
694 views

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 ...
-1
votes
1answer
10 views

will libvirt don't create vnetX tun device?

When I create the vm instance using libvirt, it will create a TUN device named vnetX. I wonder would libvirt don't create the vnet device, instead, I use other method to create it.
3
votes
1answer
655 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 ...
0
votes
1answer
514 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 ...
2
votes
2answers
366 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 ...
0
votes
0answers
18 views

Can i implement thin virtual desktop clients using KVM

I had read What is virtualization and studied basics of KVM virtualization and terms. not only sitting infront of PC and installing three or four guest OSes is there any other things i can do with KVM ...
2
votes
1answer
422 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 ...
1
vote
0answers
13 views

Proxmox server VM growing than what i have assigned for VM disk space

I have only 2 VM's in one of the SSD hard disk server, Hard disk size was just 120 GB. I have assigned 32 GB for each VM's but now there is only 1 GB space left in /var/lib/vz. While listing the size ...
-1
votes
1answer
18 views

acedemic projects related to linux virtualization and security [closed]

I am B.tech student iam totally confused with the topic virtualization. but i selected linux virtualization security as a project in my college. please guide me. i tried in google but i found so many ...
2
votes
1answer
24 views

Linux with VM Windows guests in kiosk mode

We have a bunch of computers in our school, which are used by many students and some of them are really having fun in messing around with the system. However it's not possible to restrict access to ...
3
votes
0answers
17 views

Why does saving a KVM-QEMU VM requires additional memory?

I have three VMs running on Red Hat Enterprise Linux with 8 GB RAM, each of the VMs has 3 GB allocated, and I also run a 512 MB VM. If we also consider the guest OS's memory usage (usually 1.5 GB due ...
1
vote
0answers
14 views

How to replicate KVM for DR purpose?

I am looking to replicate multiple KVM servers from one data center to another data center. What steps with specific commands to be used to replicate one server so I can use that for others. Thanks ...
6
votes
3answers
10k views

How to create a dupe of a KVM/libvirt/virt-manager VM?

I'm a bit lost with virt-manager / libvirt / KVM. I've got a working KVM VM (Windows XP) which works nicely. The VM is backed by a 4GB file or so (a .img). Now I want to do something very simple: I ...
1
vote
2answers
21 views

How to install KVM to use existing installed OS's?

I have four partitions on 2 HD's, sda and sdb, each having Debian installed in different configurations. My general purpose OS is on sda1, and I want to be able to run VM's of the other OS's while ...
7
votes
3answers
10k views

Use virt-manager to share files between Linux host and Windows guest?

Is it possible to use "Filesystem Passthrough" virtual hardware option inside virt-manager to share a folder on my Linux host with my Windows guest? I found some tutorials for how to do this with a ...
0
votes
1answer
612 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 ...
1
vote
0answers
77 views

complete KVM / libvirt breakdown after OS upgrade (openSUSE)

I have upgraded two E-350 systems which have been running VMs (one of the systems only Linux VMs, the other one Windows VMs) to openSUSE 13.1 (i.e kernel 3.11.10, kvm-1.6.0, libvirt-1.1.2). After a ...
8
votes
1answer
92 views

Does QEMU/KVM use Intel AES instructions for encrypted qcow2 images if the host CPU has them?

The qcow2 image file format for KVM can use AES encryption. The encryption is applied at the cluster level: Each sector within each cluster is independently encrypted using AES Cipher Block ...
1
vote
0answers
837 views

Setting up VGA Passthrough on Ubuntu with KVM : error no iommu_group for device qemu-system-x86_64

I'm trying to configure the VGA Passthrough on the Debian SID because I want to use Debian on the first monitor and Windows 7/8 on the other one. I have tried with XEN and with KVM but in both case I ...
0
votes
0answers
34 views

Adding QEMU/KVM option to virsh VM starting script

I use libvirt to manage a QEMU/KVM system. Starting a VM only by using virsh start vmname What I want to know is how to add an option to virsh starting script, in my case I want to add QEMU ...
0
votes
0answers
35 views

How to bridge a VM to public IP

I wish to to assign the IP from my eth1:2 to a VM; I also have no use of this IP for the host, it would be desirable to be exclusive to the VM. I've ended up with a setup just like this (eth1:1, ...
2
votes
0answers
76 views

USB ethernet device not working in VM

I'm having trouble getting a USB ethernet device working in a qemu-kvm/libvirt VM. The problem is that even though the guest OS sees the USB device just fine it can't mount it. lsusb on the guest ...
3
votes
2answers
709 views

Which user group can use the 'tap' net device?

I use the 'tap' net device with KVM to get my vm connect to the Internet. But I have to be root, or use 'sudo', which is inconvenient. I think I can put my user account into some group so I can access ...
2
votes
1answer
95 views

Getting an already installed Android x86 partition to run on KVM

(Originally posted on SuperUser here, but posted here due to lack of responses.) I have Android installed on sda3, and it boots fine when loaded from Grub with the following commands: set ...
1
vote
1answer
52 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 ...
2
votes
1answer
106 views

How to test Disk IO on VMs with iozone?

I want to test the disk IO performance like read, write, random read, random write and so on both in physical machine and VMs (with aufs file system). Also I want to test the throughput performance in ...
2
votes
2answers
636 views

virsh, how to list autostart domains?

In virsh how do I see which domains are marked as autostart? virsh list does not show which domains are marked as autostart.
1
vote
1answer
36 views

can't get 16:9 ratio on kvm, only 16:10 or 4:3

I am running a Windows 7 KVM on CentOS 7. The Windows 7 guest resolutions are all 4:3 or 16:10 My monitor is 1920x1080, but KVM/Spice/Whatever is only offering me 1920x1200. I don't know what part ...
2
votes
1answer
2k views

How do I get my mouse back from qemu/kvm?

I'm running qemu/kvm on Debian testing x64 with this command: kvm -m 1024 -hda win7.img -cdrom win7x86.iso -boot d -net user but when I click inside the virtual machine, qemu captures my mouse and ...
1
vote
1answer
83 views

Allow multicast packages from the bridge to wire in KVM

On a CentOS 6.5 host, I have a couple of guests - Ubuntu 12.04 and CentOS 6.5. The Ubuntu guest is generating mcast traffic that is visible via a tcpdump on the br3 interface. It is also visible on ...
0
votes
1answer
29 views

What are the diffence between virsh, virt-install, and virt-manager?

I know all of virsh, virt-install, and virt-manager can manage the virtual machines. However, what are the difference between the three?
2
votes
2answers
247 views

libvirt error when enabling hugepages for guest

I'm trying to set up a VM using libvirt and KVM through virt-manager (and virsh command line) with hugepages support and I get an error when enabling the option in the domain XML. Don't know where the ...
1
vote
3answers
611 views

How can I get kqemu or even just qemu to show up in virsh capabilities on CentOS 6.4?

I have a CentOS 6.4 box that I'm trying to set up a VM on to run WinXP. This box doesn't have VT, which may not be ideal, but I'll settle for less than ideal. Apparently I should be able to install ...
1
vote
2answers
3k views

Viewer Connection to hypervisor host got refused

I used the inbuilt VNC-Viewer in the virt-manager to see the VM desktops. But now when I click the Play button in the VM Window to see the desktop of the VM named server1.example.com, I get an error ...
0
votes
1answer
46 views

How to write shell script on VMDK to derive configuration

I have several VMDK files and I would like to write a shell scripts to derive configuration (i.e. No. of CPUs, RAM, NIC, HDDs Size, No of HDDs, etc.). How can I do this, or where do I start?
1
vote
2answers
152 views

kvm guest OS not accessible after system reboot

I was configuring kvm on my laptop which has ubuntu 14.04 as the host OS. I added a Fedora guest OS using the virt-manager and it worked fine. However, after I rebooted the virtual machine, the guest ...
4
votes
1answer
284 views

setup kvm on a wireless interface on a laptop machine

I am trying to setup KVM in ubuntu 14.04 host machine. I use a wireless interface to access the internet in my machine. I have setup the wireless interface in my /etc/networks/interfaces as below. ...
1
vote
2answers
102 views

how can I create a KVM guest 100% as a non root user?

In a debian host with many users, I want to allow different users to create their own VMs, completely independent of each other. The closest relevant (non-root) way I have seen in guides is by ...
0
votes
1answer
1k views

KVM Domain not creating

While I am trying to create a new KVM Machine , I am getting the following error , Unable to complete install: 'Domain has not existed. You should be able to find more information in the logs' ...
0
votes
2answers
197 views

no internet connection for a kvm guest. what could be wrong?

I have setup a kvm win7 guest on a debian host. It's been up and running for a while now, but I had not done much with it. What I had done (for sure) was to download putty. Today I wanted to try and ...
2
votes
0answers
54 views

How to find IP of the KVM Virtual Machine from Host system?

My KVM VMs are connected using MaCVTAP connection VM network Interfaces. I have to manually go into the VM to find the IP address. The VM interface doesn't ping to the host interface as the source ...
0
votes
1answer
777 views

Enable 9p filesystem type in Centos 6 virtual guest?

My question is linked to this one : http://stackoverflow.com/questions/17880460/mounting-shared-folder-in-kvm-vm-error-mount-unknown-filesystem-type-9p (but can't comment it) I have apparently the ...
2
votes
1answer
95 views

KVM bridge network requirement

I am following the following guide on installing my first KVM HV. http://wiki.centos.org/HowTos/KVM I thing I do not understand is the bit about bridge network setup. It states its optional, but what ...
0
votes
0answers
74 views

Debian, Dibbler, IPv6 and Bridging Woes

I'm currently trying to setup my Dedibox LT as a virtualisation (KVM) server. I've elected to use Debian instead of Proxmox or ESXi for various reasons. Currently I'm having problems with getting ...
0
votes
0answers
30 views

KVM based RHEL 6.3 VM OS installation - lvm based partition feature not availble

I am installing RHEL VM OS on KVM by virtual manager tool. While installing the OS, I want to do lvm based partition. For example: Filesystem Size Used Avail Use% Mounted on ...