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

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CentOS 6.5 + KVM (Virtual Machine Manager) create shortcut - Laucher for Guest Machine

How can I create a Launcher on my desktop for guests machines inside of KVM on desktop of CentOS 6.5?
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DHCP server not responding to requests from KVM guest

I've setup a DHCP server on my Debian server (Proxmox) so that I can provision IPs to my KVM guests on the server automatically. For some reason the DHCP server (isc-dhcp-server) isn't responding to ...
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Solaris 10 installation on KVM constantly reboot

Successfully installed Solaris 10 sparc on KVM. However when I restarted the VM it doesn't go to login screen but just constantly reboots. I've read different documents link1 link2 link3 but none of ...
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iptables server behind NAT accessible from outside as well as inside the nat

I have 2 machines with a KVM running on each machine - so two kvms with the below networking Host 1: 192.168.10.100 (eth2) 10.10.100.1 (virbr1) KVM 1 (NAT with Host 1): 10.10.100.128 (eth0 ...
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58 views

Using KSM in OpenVZ

I am setting up an OpenVZ node and while everything looks good so far, I am confused as to whether or not KSM works in OpenVZ. The majority of this thread seems to note that KSM has been disabled due ...
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Error mounting shared folder for KVM Solaris guest

Followed this guide on how to set up a shared folder between a KVM Host(Ubuntu 12.04) and Guest (Solaris 10 Sparc). On the last part of the it requires you to mount the shared folder and typed in this ...
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200 views

CPU Placement in KVM

I have a configuration of KVM guests where the cpu placement is configured as follows: <vcpu placement='static'>1</vcpu> Now since I don't have a cpuset specified I was reading libvirt ...
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Secondary bridge only working at random in debian wheezy

We are currently migrating from vmware server to kvm. So far everything works smooth, with the exception of the secondary bridge. Our network layout is as follows: Firewall with 3 ports eth0 Public ...
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214 views

Qemu Backing Files Question

If I'm creating a new.qcow2 qcow2 image based on a backing file (called base.qcow2) and the backing file is located on an nfs share. What happens if someone tries to modify, replace, or delete the ...
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Migrate a qcow2 image between storage pools

I have 2 storage pools. host_images (directory storage pool) remote_images (nfs storage pool) How do I copy qcow images from remote_images to host_images using libvirt APIs? I've tried using the ...
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1answer
910 views

KVM can't access iso o raw images outside /var/lib/libvirt/images

I'm using Linux Mint Debian Edition (Up. 8) when tryng to start a virtual machine from libvirt (either from commandline or using virt-manager to local qemu-kvm) I get this error when I use an image ...
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Allow users administrative access to some of the KVM VM's

I am running a KVM virtualization server on CentOS 6. How can I allow certain users administrative access (reboot, reinstall, erase) to only some virtual machines, but not other? I am using buth ...
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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 ...
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How to install Ubuntu 13.10 virtual machine on top of KVM running on Ubuntu 13.10

When I try to install LUbuntu 13.10 as a virtual machine using Qemu-KVM running on Lubuntu 13.10, I get a garbled screen when I start the virtual machine and/or when I start the installation process. ...
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virt-resize complains: “virt-resize: error: You cannot use --expand when there is no surplus space to expand into.”

I am resizing an installed KVM domain # resize the partitions virt-resize --expand /dev/vda2 --LV-expand /dev/vg_main/lv_root $VMFILE $VMFILE.tmp and virt-resize throws an error: virt-resize: ...
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What is the structure of Libvirt Qemu VM dump/save files?

I need to do some exploration of Qemu-KVM virtual machines physical memory (particularly I need to check the fact of the physical memory intersection). In order to do that I'm trying to save VM's ...
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874 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' ...
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Wireless bridged networking in KVM. Why is it so complicated?

I've been using VirtualBox (and sometimes VMWare) for years and I've never had any problem with the virtual network adapters, no matter if the physical ones were wired or not. I also played some time ...
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286 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 ...
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1answer
88 views

How do I know that my virtual guest is using VT-x?

I know my cpu supports VT-x, but how can I check that the KVM guest machine uses it? My Desktop is CentOS running a Windows 7 guest. I'm asking because.. the virtual Windows 7 says I'm using a XEON ...
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517 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 ...
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581 views

CentOS 6 KVM host with CentOS 6 guests kvm-clock enabled major time drift

I have a CentOS 6 KVM host with CentOS 6 guests, all 64bit. The host syncs time from NTP and has remained bang on. All the guests have kvm-clock listed as current_clocksource but over the last 3 ...
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Proper way for setting general policy and firewall rules with libvirtd

I'm just struggling with the firewall configuration of our new KVM Host. I think by now I understand how libvirtd implements networking, but I'm missing a way to set some decent firewall rules. To ...
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Mageia - how do I setup a KVM for Windows gaming?

Okay so I setup a KVM using Virt-Manager, Iset it to 7443 out of 8GB RAM, Got it to emulate my CPU fully, everything worked fine, but I cant get my GPU to unbind from the host to the guest, So is ...
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598 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 ...
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KVM Desktop Client cannot connect to www server

I have a KVM test set up on a workstation. All the instances are using macvtap and a bridge. I can access the web server running on the KVM from a physically separate machine by IP address or DNS ...
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542 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 ...
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340 views

kvm usb modem passthrough

I'm trying to set up a USB modem passthrough in kvm virt-manager. The host is Fedora 20. The guest is Centos 6 $ ifconfig wlp0s29u1u6: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500 ether ...
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160 views

Install a basic CentOS VM on Fedora 19 with libvirt

I would like to install a CentOS 6.5 virtual machine on my machine, only with command line tools and basic networking capabilities, i.e a way to have http and ssh connections between the host (Fedora ...
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130 views

How to start a virtual machine filled with qemu-nbd?

I migrated a Windows OS (entire disk) to a virtual machine on another host (Debian with qemu and kvm). I used Selfimage to export the disk. On the host, first of all, I created an empty virtual ...
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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 ...
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ssh local tunnel to VM

So, can anyone explain why this doesn't work? Everything from remote host (192.168.1.3): ssh -L 9000:192.168.1.2:80 login@192.168.1.2 elinks http:127.0.0.1:9000 and I can see a web page. other ...
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Can (and how) KVM use NTFS storage?

Using SL6.4, I am trying to create a new KVM virtual machine using virt-manager. When defining storage at default pool, it boots up OK. However, when trying to use storage located on external NTFS ...
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How to use VNC for gaming?

I was just wondering if it's possible to set up a windows 7 VPS/VNC server to be used for gaming on my local network. I have a macbook pro as my main computer, it doesn't quite have the horsepower ...
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Why do I see more processes in KVM than in OpenVZ?

I've got a 512mb Centos 6 VPS running on KVM. Now another VPS from a org. I manage is running on OVZ. When I type top on the KVM one, I get a whole list of all sort off processes. But when I do this ...
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370 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 ...
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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 ...
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How does KVM set its own netfilter rules?

I've been poking around with KVM VM's on Centos 6.4 and after some hair pulling and copious amounts of trying to break my desk with my head due to not having an internet connection on my VM's, I found ...
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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 ...
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libvirtd not suspending guests

My guests, one windows, one linux, are not being suspended. I'm not sure why. Here's the output of systemctl, which looks wrong, but I've done systemctl start libvirt-guests && systemctl ...
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How to Add Extra Disks on KVM based VM

I installed Redhat 6.4 on KVM Server. Right Now there is only One Disk /dev/vda. Now I need to add extra Disk like /dev/vdb I tried adding New Volume but it is not showing when I do fdisk -l How to ...
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357 views

Bridging on boot causes system to hang

Whenever I set br0 to automatically start up on boot, it causes the system to hang - usually on a line that says something like "waiting 2 seconds for br0 to get ready" or "bound to x.x.x.x to br0 - ...
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Copying large file causes excessive swap

On a mid-class CentOS 6.4/64 server with 32 GB RAM, 3 TB free disk space, operating as KVM hypervisor, I start copying a 200 GB file to a destination in the same local filesystem. In fact, this file ...
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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 ...
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How to check which hypervisor is used from my VM? [duplicate]

So I'm running a VM somewhere and want to know what hypervisor the host is running. Any way to check whether it's running KVM or in a container? The vm is running Ubuntu
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Can virtfs/9p be used as root file system?

Is it possible to use a folder shared from the host to the guest via virtfs/9p as the root file system inside the guest? Loosely related to my previous question: Can virtfs/9p be used to share the ...
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1answer
249 views

Can virtfs/9p be used to share the same host folder with multiple guests?

So far I have resorted to sharing host folders with the KVM guests via Samba. Now, reading up a bit on it, it appears that "VirtFS (Plan 9 folder sharing over Virtio - I/O virtualization framework)" ...
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KVM loss of data?

I'm planning to install KVM on Linux Mint. I heard it is possible to corrupt files and partitions. There are warnings here but I haven't finish reading it (I will tonight). There is also another ...
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113 views

Options to sync 16GB+ KVM images

Is there a software that sync KVM images in real time on ArchLinux? i have 2 HDD that configured as RAID-0 (for performance reason) and 1 HDD for backup i want to have a real-time backup images on ...
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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 ...