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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.

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What is the perfect setup for a small Linux virtual server?

I have my own email server, and it serves a couple of dozen users. I need to replace it right now, and I want the replacement to be a virtual server image running under a hypervisor. My plans for ...
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How do you install kvm on CentOS 5.3 using yum?

I'm trying to get kvm installed on CentOS 5.3. Doing "yum install kvm" doesn't quite work. The problem is that the Intel kvm kernel modules won't load: # modprobe kvm-intel FATAL: Module kvm_intel ...
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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 ...
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How can I run a kvm guest without a framebuffer device?

I have Win2008 on a Debian using kvm and it works beautifully with kvm -m 2048 -vnc :0 win2008.img Unfortunately it does not work when I remove the -vnc :0 parameter: kvm -m 2048 win2008.img ==...
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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 ...
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ZFS virtualized on an LVM volume

We've got some large SATA disks kicking around, and I've been toying with the idea of throwing them in a KVM host and installing a FreeNAS VM to manage them. I'd be adding these via LVM to the host, ...
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Tough Choice: Xen or KVM

I'm building a fresh workstation and want to use Linux alongside Windows. This seems like a good opportunity to get acquainted with with either Xen or KVM. So I face a choice. In favour of using ...
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Installing Windows 2003 over remote DRAC 4

I'm trying to install windows 2003 over a DRAC 4 console session by using a ISO file. But it keeps freezing during the GUI installation then when login back Windows Setup says some files not found ...
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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 ...
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3answers
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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 ...
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Is it possible to run an Ubuntu JeOS 9.10 guest in a 9.04 host system?

I am running Ubuntu Server 9.04 system and building KVM guests of the same version via the vmbuilder script. Now I wonder if it is - in principle - possible to run an newer guest system than the host'...
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How do I extend the virsh/qemu/libvirt Timeout?

There's a known issue with starting virtual machines with large hard drive images. Apparently, the time-out is 3 seconds, but in reality, it can take up to 15 seconds for a machine to start. I've read ...
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How do you synchronise huge sparse files (VM disk images) between machines?

Is there a command, such as rsync, which can synchronise huge, sparse, files from one linux server to another? It is very important that the destination file remains sparse. It may be longer (but ...
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win2k8 guest on KVM periodically gets corrupted

I have a Win2k8 guest running on a Fedora 11 system with KVM. For unknown reasons, sometimes when I start the VM, it fails to start in various ways. Sometimes it will bluescreen on boot, sometimes ...
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Bridge virtual machines out WLAN interface

It seems that my wlan card (intel 5100 AGN) firmware doesn't allow "spoofing" MAC addresses. This has the side effect of destroying the capability to bridge out my virtual machines on that interface. ...
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Paravirtualization under KVM and Ubuntu Server

I have an XEON based server which is perfectly capable of paravirtualization. The thing is, with Ubuntu Server 8.04 and KVM I can't get the option to check "Paravirtualized server". It's grayed out ...
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1answer
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Share monitor/mirror port between VMs

I'd like to set up two different systems that will monitor network traffic, but have only one monitor/mirror port available on our central switch. I was hoping that I could install both systems as ...
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1answer
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Apt-get and aptitude not working in Ubuntu 9.04 KVM environment

I don't seem to get apt to work on a KVM in a Ubuntu 9.04 box. The virtual machine is an Ubuntu server. Network does seem to work (I can ping and attempt ssh connections, for instance), but running ...
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kvm virtualization and external access to guest OS on ubuntu 9.04

I want to access my guest OS by ssh and not by ugly GUI that's provided by virt-manager. How do I enable guest OS to be accessible externally ? All I found was to configure bridge interface and did ...
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what cluster management software to use for linux?

I have found the following cluster management software tools: pacemaker (clusterlabs.org), - original a Heartbeat project, focus for high-availability, will be in the next debian version openqrm (...
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KVM and having the root drive as sda

KVM, as it is based on qemu, emulates the hard drive as /dev/hda, via an IDE adapter. However, my images (taken from a real machine) assume the boot drive to be /dev/sda. This can ofcourse be changed, ...
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Xen/KVM host speed vs “clean” kernel speed

We look to continue running some apps on Dom0/KVN host, and I like to know, if there any performance difference between Xen/KVM enabled kernel, and "clean" regular kernel. Have someone ever bench-...
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Xen vs. KVM in performance

What is faster on the same hardware, Xen or KVM? I'm trying to pick-up a virtualization technology to work, which gives the best performance. There are some benchmarks here that I found on the ...
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What is bridge_fd?

I'm creating bridge network on Ubuntu 9.04(server) I set up following configuration file /etc/network/interfaces auto lo iface lo inet loopback auto eth0 iface eth0 inet manual auto br0 iface br0 ...
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How to login to console besides ssh,vnc in kvm-linux

kvm-linux is sometimes hung up ssh is dead sudo kvm -hda ubuntu.img -m 512 -localtime -net nic,model=pcnet,macaddr=00:00:00:00:00:0X -net tap,script=/etc/qemu-ifup -daemonize -nographic How to ...
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2answers
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KVM bridge trouble in Ubuntu (server 9.04)

I make virtual environment with Ubuntu+KVM. It is the following constitution, but it is lent IP (192.168.1.2) ubuntu02 by DHCPD, and the same IP seems to be lent to ubuntu03 router/dhcpd - ...
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KVM Virtualization on AMD64 running Ubuntu 9.04

I want to setup KVM virtualization on my laptop Dell Inspiron 1526 (AMD64 Turion, 2GB RAM) running Ubuntu 9.04 desktop, kernel 2.6.28 and KVM-84 (the latest official versions supported by Ubuntu) I ...
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3answers
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Best way to benchmark linux virtualization solutions

I'd like to run some benchmarks on linux virtualization solutions (namely Xen, KVM and OpenVZ) and I'm currently thinking about how to set up the test environment. My current approach would be the ...
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2answers
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Strange libvirt/KVM issue, destroying instances?

I have a libvirt/KVM server running on Ubuntu 9.04 with a variety of instances I use for testing. I was destroying instances via virsh and occassionally, destroying one instance would take out another....
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3answers
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Snapshot/rollback for libvirt+KVM?

I've recently begun using KVM for my development/test environment on a Linux host system with 8G memory. Prior, I was using VMware Fusion for my virtual environment, but my Macbook only has 2G memory. ...
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3answers
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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,...
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VNC on Vista

I'm using UltraVNC on my Vista machine, and it's giving me very poor performance, even over a 300 mbs network. It seems to be doing screen polling. I looked, and it doesn't look like the video hook ...