Questions tagged [kvm-virtualization]

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, kvm-intel.ko or kvm-amd.ko. KVM also requires a modified QEMU although work is underway to get the required changes upstream.

Filter by
Sorted by
Tagged with
6
votes
3answers
5k views

For kvm host images. GFS2 or OCFS2 with drbd8?

I want a shared filesystem on top of drbd8 on two nodes. The servers run ubuntu 9.10. I googled a lot, but couldn't find an clear trend what the web community prefers. It's seems that OCFS2 is ...
5
votes
3answers
24k views

Linux KVM on a Virtualbox

Can we install a KVM machine on a virtualbox machine??? Virtual Machine on a Virtual Machine I get the following error when I issue: $ virt-install –-name kvm_client1 –-ram 256 –-disk path=/var/lib/...
5
votes
5answers
10k views

Installing OEM branded media of Windows Server 2008 under KVM

Issue I have an HP server that came with an OEM copy of Windows Server 2008. I have installed CentOS 5.4 on the hardware and am trying to install Windows Server 2008 as a KVM guest. When I attempt ...
5
votes
2answers
13k views

Routing networking on kvm

There are a lot of configuration used for Kvm-networking. But i'm not able to get to the guest from the host or outside. I'm working on Ubuntu 11.04. On the guest i've a WindowsXp with dhcp. I want ...
5
votes
1answer
9k views

Difference between qemu-kvm, qemu-system-x86_64, qemu-x86_64

For new features, I recently updated qemu-kvm 1.5.3 to qemu 2.5.0, but I saw several qemu binaries, /usr/local/bin/qemu-x86_64 and /usr/local/bin/qemu-system-x86_64. It seems qemu-system-x86_64 is the ...
5
votes
4answers
11k views

Using LVM snapshots for KVM virtual machine clones

So, I've got a pretty awesome KVM setup running now, CentOS5.5 on the host and guest domains, libvirt managing all the configuration, etc. The guest domain filesystems are stored in LVM on top of a ...
5
votes
1answer
931 views

KVM Host: Hardware RAID with cache + BBU vs. Linux Software RAID with LVM writeback cache and UPS

I want to set up a RAID 5 with 3x1TB drives on a Linux KVM-Host. The RAID will be used as LVM thin storage for VM disks. There has already been much discussion on hardware raid vs software [1]. ...
5
votes
3answers
18k 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 ...
5
votes
2answers
11k views

Change VNC listen address in Libvirt without restarting VM

Is there a way to to edit the listen address of a Libvirt-Machine on the fly? At the moment it seems like when I want to edit the listen address, I have to shut down the corresponding VM first, then ...
5
votes
2answers
7k views

Getting windows virtio mounted/installed for KVM

There might be an easy answer to this. I have exhausted my search on google for a solution. Here's my problem. I need to get Windows working on a KVM vps with virtualizor CP. As I get into windows ...
5
votes
1answer
2k views

KVM/libvirt: how to migrate between 2 hosts with different CPUs

I tried to migrate my KVM host from a host with AMD cpu to a host with Intel CPU but when I run virsh start guest_name I got error: unsupported configuration: CPU model ... is not supported by ...
5
votes
4answers
4k views

Linux KVM Client filesystem (BTRFS?)

in our company we have a lot of kvm clients on multiple server, most of the clients are running ubuntu 16.04 as well as their host systems. The filesystem of choice became EXT4, for clients and hosts....
5
votes
3answers
12k views

KVM booting off-image kernel and existing partition

I am in the process of switching from Xen to qemu-kvm. My current Xen installation has a number of LVM volumes each with a partition (rather than a full disk image). In Xen, I start each VM with a ...
5
votes
5answers
2k views

Web-Based Virtual Machine Manager

I am looking for a web-based virtual machine manager, which will work on our Ubuntu server. Ideally, I need something that our team can use to create a VM, test builds and packaging and then either ...
5
votes
1answer
13k views

Multiple, different VLAN trunks to KVM guests (Linux)

I've hit a roadblock of sorts with an architectural challenge. I've got a server running KVM - which will feature a number of guests, some running virtualised firewalls and others, just plain web ...
5
votes
1answer
2k views

KVM virtual machines cannot reach IPv6 web sites

I have a freshly installed Windows Server 2008 R2 SP1 virtual machine which is completely unable to reach any IPv6 web pages, despite apparently having proper IPv6 connectivity. In addition, other ...
5
votes
2answers
4k views

Unattended installation of Windows Server 2012 on KVM

I am trying to perform an unattended install of Windows Server 2012 into a KVM virtual machine, using virt-install. The installer is complaining, "Windows cannot read the <ProductKey> setting ...
5
votes
1answer
6k views

KVM guests lose connectivity after networking restart

we're setting up an ubuntu server 10.04 host with kvm. The host is setup with a bond and bridged interfaces to allow the guests access to the network without natting. Our current configuration is ...
5
votes
2answers
7k views

Backup of KVM guests when using qcow2 disk files

I got a Ubuntu (hardy) system used for virtualization using KVM. Each guest got it's own qcow2 file used as disk. Guests are running Ubuntu (hardy). What would a good backup strategy be for such a ...
5
votes
3answers
6k views

Clock synchronisation on kvm guests

I'm having trouble keeping the system clocks sync'd on a number of kvm guests. I've googled a fair bit, and found a lot of different options, many of which I've tried, to no avail. So here I am. ntpd ...
5
votes
5answers
9k views

QCOW2 virtual size lowering

I'm trying to get the virtual size of a qcow2 container down so that it can fit in a openstack flavor with 10GB disk. root@node-10:~# qemu-img info zztop.qcow image: zztop.qcow file format: qcow2 ...
5
votes
2answers
12k views

Assign ipv6 address to KVM guests on bridge mode

System: CentOS 6.5 Network: Bridge on br0 IPv6: ISP Native /64 block. IPv4: ISP address (not internal LAN) Purpose: To assign IPv6 only to guests (manually), I don't want ipv4 address to be ...
5
votes
1answer
3k views

New KVM guests cannot access outside LAN

I have a KVM host (at 192.168.0.10) that currently has one working KVM guest (at 192.168.0.12). On attempting to install a new KVM guest today, I reached a problem where the network on the new guest ...
5
votes
3answers
3k views

Creating a private network for two VMs

I am trying to create two VMs which are both connected to the same private network. I'm using Linux with qemu-kvm 1.0. My plan of attack has been this: brctl addbr bridge ifconfig bridge up tunctl -...
5
votes
3answers
7k views

KVM on Ubuntu: console connection displays nothing

I've created a KVM virtual machine using the following command: sudo ubuntu-vm-builder kvm oneiric \ --domain xpstage \ --dest xpstage \ --arch ...
5
votes
5answers
2k views

Automated install of Lucid guests on Lucid KVM Server

We have an Ubuntu 10.04 server running KVM very nicely, but are having trouble figuring out the cleanest (and fastest) way to do unattended installs of 10.04 guests. Requirements: Must use LVM ...
5
votes
3answers
442 views

Linux Kernel Virtual Machines

I've been running KVM for a few of the management servers at work, I've actually been very happy with it all around, and now want to move to the next phase, and deploy some heavy services (data-mining,...
5
votes
1answer
9k views

Access libvirt+KVM virtual machines with DNS

I have an Ubuntu Trusty machine running KVM + Libvirt to manage small virtual machines, and using the standard NetworkManager to connect to regular networks. I want to be able to access the virtual ...
5
votes
1answer
6k views

Virtualization - Linux KVM-QEMU host Windows VM guest, how to access data drive

What is the best way to share a Data partition on a Linux KVM-QEMU host with a Windows VM guest? I could use Samba networking and connect to the drive as a network share but I was hoping there might ...
5
votes
2answers
4k views

qemu-kvm/virsh: No network connectivity whilst using bridged networking

I'm having an issue with performing virtualisation via libvirt/qemu-kvm, in which my set up for bridged networking doesn't appear to be working correctly. I've followed every tutorial I can find and ...
5
votes
2answers
3k views

libvirt qemu/kvm migration problem

I am using kvm and libvirt on my Dell server. Now i am trying to migrate one virtual machine from a physical server to another. However, I failed everytime. In virsh on physicalServer1, I typed: ...
5
votes
2answers
2k views

Network freezes with KVM/libvirt and ip_forward = 1

I'm using KVM and libvirt and experience small network freezes on the host and the guests every 2-3 minutes or so. The freezes last 1-2 seconds. The used OS is Ubuntu 10 LTS server edition. I'm ...
5
votes
2answers
2k views

Server freezes without kernel panic

We are running a KVM node which is crashing irregularly showing a very strange behaviour. The interesting thing is that we already had this problem with another node which crashed every 1-2 weeks. As ...
5
votes
1answer
1k views

Adding SSD cache (PCIe) to existing Linux KVM Node with SATA disks

I currently have large KVM nodes utilizing between 8 & 16 RAID10 arrays & hardware raid. We typically provision a single large volume (VM's are backed up off site as well). KVM VM's using LVM ...
5
votes
1answer
4k views

Does kern.hz still have any relevance in FreeBSD if “dynamic tick mode” is enabled?

I'm running a FreeBSD 9.0 setup as a virtual machine in a KVM setup. In previous versions of FreeBSD it was common to force the kern.hz setting to a lower value so that the virtual machine does not ...
5
votes
2answers
6k views

KVM Hosting: How to efficiently replicate guests

I have three KVM servers each with 1 guest VM, running directly on it's local storage, (so they are essentially getting a dedicated box worth of computing power each). In the event of a host failure I ...
5
votes
1answer
19k views

Poor network performance with KVM (virtio drivers) - Update: with vhost_net

I've set up several KVM based networks before, and never encountered this issue, can't for the life of me think what I'd have set up differently previously. Setup Basically, Ive got and entirely ...
5
votes
1answer
785 views

KVM + cgroups: Dom0 process best practice?

I am transitioning from Xen to KVM, and will be using Fedora 14. I plan to use cgroups to assign priorities to VMs. My question is as follows: If I place VMs in various cgroups, should I also put ...
5
votes
3answers
369 views

file corruption on read/write 2.6.32-22-server (happens across many kernels)

I'm having an issue where after the server has been up for a period of time (~week/few days) the server will start reading corrupt data. For instance when I run a sha1sum of a file after a fresh boot ...
5
votes
2answers
11k views

KVM network bridge with two NICs

Greetings, I'm trying to set up bridged networking with KVM and am getting nowhere. There are docs and tutorials on the subject, but they all seem to conflict or don't provide enough info. I was ...
5
votes
2answers
3k views

Eucalyptus or OpenNebula or… for a Linux and Windows build server private cloud

We are setting up an 8-machine build farm. Most of these builds need to happen on a specific flavor of Linux (Fedora 10 as of now), while some of them will happen on several different Windows VMs. We ...
4
votes
3answers
5k views

SmartOS Virtualization with one public IP address

Is it possible? (title of this question) Googling Virtualization with one public IP address yields nothing useful What I have: SmartOS on a dedicated server. Dedicated server has one public IP ...
4
votes
3answers
16k views

Get link speed of an virtio-net network adapter

I have an linux vm running on kvm with virtio-net, and I want to check the link speed. How can I do that? What I tried so far: # ethtool eth0 Settings for eth0: Link detected: yes It seems that ...
4
votes
2answers
5k views

kvm: 23090: cpu0 unhandled wrmsr 0x391 data 2000000f

I installed kvm on CentOS 6.4. I created virtual server CentOS_test on it. When I start CEntOS_test I have message: kvm: 23090: cpu0 unhandled wrmsr 0x391 data 2000000f What is it mean? CentOS_test ...
4
votes
2answers
18k views

virsh command that displays the cpu and memory consumption?

I want to know if there is a command virsh to display the cpu and memory consumption of each machine virtual. I created the virtual machine using KVM in ubuntu system.
4
votes
3answers
6k views

How can I run Rackspace images locally?

As the title says, I regularly download my Rackspace images for backup of my VPS, however I'm wondering if it's possible to run them locally on KVM (for example) so I can run tests on my application ...
4
votes
4answers
2k views

Xen or KVM? Please help me decide and implement the one which is better

I have been doing research for implementing virtualization for a server running 3 guests - two linux based and one windows. After trying my hands on Xenserver, I am impressed with the architecture and ...
4
votes
2answers
16k views

pfSense Site-toSite VPN with OpenVPN connects but won't route traffic

Using two pfSense routers, I've created a shared-key VPN between 2 sites. Both routers are pfSense 1.2.2. The pfSense box at the client site is the gateway router for that site, but at the server ...
4
votes
1answer
578 views

Why KVM VPS is slower then OPENVZ

so i just purchased one KVM vps and when i bench it and compare it with my existing openvz vps i found it that its slower that openvz vps and when i checked processor info its bit wrong info so am ...
4
votes
2answers
7k views

Slow VM installation on KVM

I have a standard (not modified) KVM+libvirtd installed on clean Centos 6 machine with 8G of RAM and 8 cores CPU. When I am trying to install guest centos 6 using virt-manager it takes ages to finish ...

1 2 3
4
5
41