Tagged Questions

0
votes
1answer
29 views

KVM how to determine which virtual disk files are in use by VMs

I tried lsof|grep *.qcow2 and got no results back (why is that? I definitely have VMs running using that disk format). I also considered grepping qcow2 on *.xml within the config directory, but this ...
1
vote
0answers
164 views

virtualbox to qemu but results in no bootable device qemu

I use vagrant to create my development vm. I exported the vmdk to vdi, and then convert the vdi to img. cd virtualbox_dir/test_vm VBoxManage clonehd test_vm.vmdk raw.vdi 0% ..... 100% qmeu-img ...
5
votes
1answer
495 views

KVM/Qemu, Ubuntu: Why do more guests CPUs enhance Disk-I/O rapidly?

We have an Heartbeat/DRBD/Pacemaker/KVM/Qemu/libvirt cluster consisting of two nodes. Each node runs Ubuntu 12.04 64 Bit with the following packages/versions: Kernel 3.2.0-32-generic #51-Ubuntu SMP ...
0
votes
1answer
362 views

CentOS libvirt reboot

I've noticed the following status message after system update (on SL 6.1 - yum update): # /etc/init.d/libvirtd status libvirtd dead but pid file exists one of the updated packages was "libvirt". ...
0
votes
1answer
1k views

Libvirt / QEmu Machine Fails and Refuses Restart Because of Memory Allocation Errors

I'm having a problem with libvirt. On a system restart all virtual machines (VMs) are started without a problem and keep running. Then at some point in time a set of machines shuts down according to ...
7
votes
2answers
2k views

Monitor VM's resources (CPU, RAM etc)

I'm testing Openstack and i'd like to know how can i find out about resource utilization inside instances (Virtual Machines). Openstack uses kvm, qemu and libvirt in my testing environment. Is there ...
0
votes
1answer
293 views

Routing table with two NIC adapters in libvirt/KVM

I created a virtual NAT network (192.168.100.0/24 network) in my libvirt and new guest with two interfaces - one in this network, one as bridged (10.34.1.0/24 network) to the local LAN. The reason for ...
4
votes
1answer
2k views

Read/write access for passthrough (9p) filesystems with libvirt/qemu?

I have recently started experimenting with the support for passthrough filesystems in recent versions of KVM/QEMU/libvirt. Making the filesystems available for read access has "just worked", but I'm ...
2
votes
2answers
2k 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 ...
1
vote
1answer
189 views

freebsd iso install on KVM - timer freezes

Trying to boot freebsd iso on KVM/libvirt [debian host] Timer shows: 10 sometimes is 9 or even 7. and that's it, count down stops.. Found some information that it's a bug with newest qemu and my ...
3
votes
1answer
3k views

Changing boot device for a QEMU-KVM virtual machine

I am trying to change the boot device for a VM. I go to the VM's XML file in /etc/libvirt/qemu and set <boot dev='cdrom' />. Still, it attempts to boot from the harddrive instead of the cdrom. ...
0
votes
1answer
940 views

Libvirt command line arguments using xml config file

I am trying something similar to http://wiki.libvirt.org/page/QEMUSwitchToLibvirt#-s . This is my xml file : <domain type='kvm' xmlns:qemu='http://libvirt.org/schemas/domain/qemu/1.0'> ...
0
votes
1answer
597 views

Using qemu-kvm images with Mac OS X?

i am a big fan of qemu-kvm, i've several instances running on servers running ubuntu linux. I now wonder if it's anyhow possible to use a virtual server image on an Mac OS X machine. Either by running ...
2
votes
1answer
536 views

libvirt, qemu, reboot hook

Is it possible to detect that the guest VM has rebooted and perform an action using libvirt / qemu? The hooks here only support the "start" and "stop" events. I would like to detect if my VM has ...
0
votes
1answer
153 views

Booting ubuntu with libvirt pass in custom script to be run from rc.local

I have an ubuntu image that I start under libvirt/qemu. I'd like to pass in a custom script at boot time that can be executed from rc.local. I can do this with Amazon EC2 instances via their ...
3
votes
2answers
985 views

How do I run a stable Windows XP kvm guest on Ubuntu 10.04?

I have three Windows XP guests running on a recently upgraded 64-bit Ubuntu 10.04 system. Occasionally (on the order of once every few days), one of the guests will become non-responsive and the kvm ...
3
votes
1answer
11k views

How to convert a raw disk image to a copy-on-write image based on another image for use with kvm and virt-manager?

I have a virtual Windows machine running on kvm. Presently it has a 90GB raw disk image. I would like to clone this VM without having to keep two copies of the 90GB raw disk image around. It seems ...
2
votes
3answers
4k views

libvirt and qemu/kvm -snapshot option

Using libvirt, I want to use QEMU's '-snapshot' option. That way, when the machine shuts down, all of the disk changes that were made get destroyed. Here is the manual for the -snapshot option: ...
3
votes
1answer
464 views

libvirtd kvm networking on Centos5.4

I've got KVM installed on CentOS 5.4, and am attempting to set up a virtual network to allow each VM to communicate with services on the host, namely DHCP to allow PXE boot installations. I'm having ...
0
votes
1answer
429 views

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 ...