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

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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 ...
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0answers
129 views

benchmarking ftp in 3 methods of virtualization

My Bachelor Final Project is about benchmarking visualization methods with ftp, web and mysql services: installing Debian on xen (para-visualization) kvm and lxc with equal resources config (equal ...
2
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3answers
2k views

How do I prevent time drift in a Debian guest on a CentOS KVM host?

I know I can install ntp in the guest, but my confused understanding of what I've Googled so far suggests this shouldn't be necessary. The Host is CentOS 6.3 and guest is Debian Wheezy, which seems ...
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0answers
50 views

Can I use Synaptics' output in KVM?

I have been looking at MenuetOS, a simple graphical OS written entirely in FASM. The only reason I don't actually use it is that its touchpad support is pure garbage: every time I try to run MenuetOS, ...
2
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3answers
730 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 ...
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1answer
444 views

virt-install error: install methods 'cannot be specified for container guests'

I was following the Dell RHEL VM guide but working on CentOS 6.4 i386/686, and got to the virt-install step. After correcting a typo, I went back and deleted the vm.xml file it was suggested I ...
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1answer
395 views

Connecting to KVM on a GUI-less CentOS 6.4 using MobaXterm

I followed the directions at this question: Installing KVM on CentOS 6.4 without GUI (yet) But I'm not sure which feature (there are many!) of MobaXterm I should use to connect to the KVM. On the ...
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1answer
2k views

virt-install complains “error: no such option: --network-bridge:br0”

I was following the directions here to set up a VM in CentOS 6.4 i386/686. But I'm getting this error: $ sudo virt-install --network-bridge:br0 --name vm1 --ram=1024 --vcpus=1 --disk ...
2
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1answer
1k views

Installing KVM on CentOS 6.4 without GUI (yet)

I've installed CentOS 6.4 from the 'minimal' iso, so it doesn't come with a GUI. Will this question's answer allow me to install KVM, or do I need to install KDE or X-server or something first?
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1answer
53 views

Samba test setup with only one physical box

I have CentOS 6.4 i386/686 installed on its own. I'd like to test out Samba 4 running as an AD DC. If I don't have another spare box to use in the lab, is it possible / does it make sense to install ...
4
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1answer
830 views

Emulate unplugging a network cable with qemu-kvm

[Background: I'd like to actually test How to take down a static network interface when not connected? ] I'm setting up a QEMU-KVM virtual machine using libvirt (via virt-manager). I put two NICs on ...
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1answer
375 views

Add new network interface to the kvm (Slackware is installed)

Installed slackware11 on KVM, which is controlled by virt-manager. I need one more network interface, so I added another one using the same model as was installed by default, and restarted the ...
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2answers
4k views

CPU usage of KVM

I have a linux host with 4 KVM linux guests. All the guest are pretty much idle, having a load of <0.1 inside the guest. Now, if I do a top on the host, each KVM process is using something about ...
3
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2answers
2k views

Install grub on LV container for VM

I'm having difficult time installing grub in LVM LV container for a VM. This is the partition table: # parted /dev/mgtvg/linux2os print Model: Linux device-mapper (linear) (dm) Disk /dev/dm-7: 129GB ...
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0answers
274 views

Disable SSH Tunnel with KVM VNC Server

Here at work we've set up a KVM server that hosts a couple guest machines. The KVM itself is headless and we remote into whenever needed, but we would like to be able to VNC into the guests. I have ...
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1answer
233 views

kvm guest Network interface no Authenication

i have a kvm host based on ubuntu 10.04 host , and the guest is rhel 5.3 64-bit, on the guest i tried to execute mii-tool eth0 SIOCGMIIREG on eth0 failed: Input/output error SIOCGMIIREG on eth0 ...
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0answers
471 views

Ubuntu 10.04 kvm Virtual Machine guest network speed slow

i have the following situation, i have a kvm host ubuntu 10.04 LTS 64-bit network host speed is perfectly run , as i am testing network speed using iperf , the speed between any network device and the ...
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3answers
4k views

Host CPU does not scale frequency when KVM guest needs it

I have asked this question on serverfault, but it could also have been posted here. I will synchronise the answers if one is found. Observation: I have an HP server with an AMD dual core CPU (Turion ...
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1answer
2k views

Is it possible to install KVM On A VMWare virtual machine? If so, what are the steps?

I want to understand how to use KVM in CenTOS. At the moment, all I have is a VMWare ESX 5.x server to use. Is there a way to get KVM working on a system that is running on VMWare? Essentially, a ...
4
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1answer
699 views

SELinux interfering with host/guest file sharing using KVM

I'm running Fedora 17 with KVM and the virtual machine runs okay. I tried to follow this to get access to a file on the host system but SELinux prevents the VM from accessing any files other than ...
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2answers
3k views

How can I restore default window size in KVM/QEMU

In KVM/QEMU machine window size by default matches guest OS resolution. But if I resize windows (accidently) how to restore default size?
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3answers
127 views

What is contained in these addresses?

I am working on MUlti-processor record-replay feature of a virtual machine. I have a log of non-deterministic memory access done in the virtual machine by virtual CPUs. A very high proportion of these ...
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2answers
106 views

How long could I work with stable release after it is no more supported?

I'm still working on Debian squeeze which will be supported for only about 1 more year (it is server with KVM). How long is it possible to work on an old version of Debian (after Debian gets old) when ...
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3answers
682 views

Debian + KVM: Which version to use? Stable or “new”?

I have Debian 6.0.4 (Squeeze) x64. Nowadays I use KVM stable package from apt-get. Could you recommend me using a compiled newest or newer version instead of using the old one KVM package from Debian ...
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1k views

How to backup KVM images? Is it possible to backup whole VM?

I need to backup all (9 VMs) my KVM VMs. I would like to backup them in the night for example once a week. For example VMware server and VMware server 2 used to have possibility to create live backups ...
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1answer
2k views

How to limit CPU performance for KVM VM?

imagine 1 Virtual machine with 2 shared cores on quad core CPU 2Ghz speed. Is it possible to limit this Virtual Machine for 500Mhz of CPU power on both cores? Or to reserve 1Ghz on 1 core for this ...
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3answers
11k views

KVM - Which Web Based management to use?

I would like to became an Expert of managing KVM on debian squeeze. I still use virt-manager. Yes, it is easy and quiet safe and quick for me. I tried a lot of web based management UI and non of ...
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2answers
168 views

How to report back system installation progress

I'd like to do some reporting from the system setup progress for virtualised (libvirt/kvm) Ubuntu servers. I expected some kind of such system to already exist out there, but couldn't find anything. ...
5
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2answers
3k views

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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1answer
311 views

Learning to Use Virtual Manager in opensuse 12.2

Ok just installed virt-manager, and then install opensuse 12.2, installed correctly, but when do zypper up had no network, then turn off the virtual machine and change the network card to a vlan in ...
4
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1answer
2k views

qemu - two clients (tap0 & tap1) via br0 can't ping eachother but server pings ok

I've got: A host system running Ubuntu with KVM (functional) Two clients, one Ubuntu and one Windows 7, nothing fancy. I've also setup (see below) a bridge via br0 for the clients: br0: ...
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4answers
4k views

How do I send a shutdown event to a QEMU guest (OpenBSD)?

I'm using virtualisation solely to install OpenBSD onto the bare hardware, and during the installation, the redirection to the serial port didn't get configured, so, I ended up with the system ...
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3answers
895 views

How to access a KVM virtual-machine?

I've created a KVM VM using virt-install. There is an image file in the directory /ssd/kvms. How do I access the virtual machine and turn it on? Do I need to assign an IP address, and if so, how do I ...
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0answers
262 views

How to setup KVM partitions?

I'm trying to install SolusVM/KVM on a server with one 500 GB HD and one 256 SSD. I am a complete beginner at Linux. SolusVM has a script on the site to download and install automatically, but how do ...
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0answers
239 views

Setup Cloudmin on Centos installed in LVM

I installed CentOS 6 with default LVM partition pattern. according to this pattern Can I use Cloudmin and store KVM Disks in LVM as Logical Volume? I think Cloudmin requires creating new logical ...
3
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1answer
6k views

What is the difference between virbr# and vnet#?

I am running KVM on RHEL6, and I have created several virtual machines in it. Issuing ifconfig command to the host system command line shows a list of virbr0, virbr1... and vnet0, vnet2... Are they ...
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2answers
3k views

Why doesn't eth0 get an ip address when set up in a bridge?

I'm trying to understand how dhcp for IPv4 is used with bridging. eth0 is configured to be in br0. This is working just fine but only br0 gets a dhcp lease, while eth0 doesn't. Both are configured ...
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1answer
450 views

How to get the cloned guest connected to the Internet?

I made a clone of a VM(running a version of Centos 6) on KVM, but the clone wouldn't connect to the Internet. Issuing ifconfig shows no interfaces but the lo. Interestingly, the original system can ...
2
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1answer
246 views

can't start default network, is there a way to run dnsmasq for both local and kvm?

I can't start KVM since I use dnsmasq on my laptop as a DNS cache server, So, I'm wondering if this can be merged to the server I'm running.
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3answers
925 views

Error when try to install KVM on CentOS

I am trying to install KVM from Installation doc. When I run the command modprobe kvm-intel I get the error FATAL: Error inserting kvm_intel ...
4
votes
1answer
1k views

kvm doesn't load Windows 8

I'm launching kvm with the following parameter: kvm -m 2g -smp ncores=2 -hda disk.img -cdrom win8.iso My CPU has VT support and enabled, EDIT I seems to have limited emulate type: pc ...
4
votes
5answers
15k views

How to improve Windows perfomance when running inside KVM

I use Ubuntu 12.04 64-bit and KVM, my CPU is Core i5 3.3 GHz and I have 8 GB of DDR3 RAM. I run Windows 7 in KVM and it's extremely slow. My co-worker use Debian on the same PC configuration and can ...
4
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1answer
215 views

Socksifying a qemu-kvm using tsocks

I'm trying to socksify a qemu-kvm using tsocks, but I have no success. I don't know if qemu access directly the hardware, skipping the OS or something like that, but I wasn't able to do this feat. ...
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2answers
2k views

How to use a 64-bit CPU in KVM?

According to tests the Mac Mini 3,1 CPU is 64-bit (grep -q "^flags.*\blm\b" /proc/cpuinfo) and supports Intel virtualization extensions (grep -q "^flags.*\bvmx\b" /proc/cpuinfo). However, after ...
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1answer
677 views

How to compile kernel for KVM guest (without paravirtualization)?

So I have a KVM machine, where I run an Ubuntu 12.04 (server edition). I want to compile a minimalistic kernel for the KVM guest, but I only found the howto for hosts, and guests with ...
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1answer
3k views

Bridging ethernet interface

I have a server with 4 public IP's. I have it with this configuration and I want to bridge the interface eth0 for using it with KVM: So, I have 3 IP's (A.B.C.144, A.B.C.145, A.B.C.146) and another ...
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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 ...
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2answers
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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1answer
794 views

Partitioning scheme for a virtual machine host

I am planning to use an Ubuntu Server 12.04 with KVM to create 2 virtual machines. Reading some docs on the net, I have found that a good approach is to use LVM based VM, so my idea is to have: 1 ...
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1answer
1k views

What is a framebuffer device and is it required to obtain a higher resolution?

I am running a gentoo guest OS on qemu-kvm. I can only get resolution of 800x600 in it. I want to be able to get a higher screen resolution. xrandr gives the following output : xrandr: Failed too ...