Questions tagged [libvirt]

libvirt is an API and toolkit for developing applications which manage virtual machine hypervisors, the virtual machines running under them, and virtual machine storage.

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2answers
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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 ...
3
votes
2answers
1k 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 ...
2
votes
1answer
3k views

How do I create a bridged virtual network for libvirt+KVM+ubuntu-server the easy way?

I see lots of documentation on how to manually set up a network bridge and then manually add vm's tun devices to these bridges and then write a shell script that glues it all together. lots of work, ...
4
votes
1answer
22k 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 ...
3
votes
1answer
1k views

Any non-custom way to manage iptables with fail2ban and libvirt+kvm?

I have an Ubuntu 9.04 server running libvirt/kvm and fail2ban (for SSH attacks). Both libvirt and fail2ban integrate with iptables in different ways. Libvirt uses (I think) some XML config and ...
15
votes
15answers
42k views

Web based KVM management for Ubuntu

We've got a single Ubuntu 9.10 root server on which we want to run multiple KVM virtual machines. To administer these virtual machines I'd like a web based KVM management tool, but I don't know which ...
3
votes
3answers
1k views

KVM “live migration finished” detection

I'm using KVM (through libvirt actually) for a research project. We're live-migrating a virtual machine between different subnets, so after the migration the IP address and routing tables have to be ...
3
votes
4answers
6k 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: ...
2
votes
1answer
1k views

two physical kvm hosts with multiple guests, private network

I have two physical hosts which run debian lenny with kvm. They have one nic which connects to the internet and another nic which is a cross-link to each other, for a faster private net. On this kvm ...
11
votes
8answers
19k views

Get list of DHCP clients with KVM+libvirt?

I have several VMs running on Ubuntu 9.10 via KVM+libvirt. I want to be able to find out the IP address that has been assigned to each host without physically opening a physical "console" to each ...
11
votes
5answers
7k views

libvirt: Change dhcp-setup without restarting

I'm using libvirt and kvm to virtualize my server. I configured libvirt to start a dhcp-server on the bridge-network-interface to give the vm's their ips. Every VM's gets always the same ip based on ...
3
votes
1answer
499 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
1k views

Set host firewall so VMs obtain dynamic IP from dnsmasq

Virtual machines (KVM/libvirt) fail to obtain a dynamic IP address from the libvirt-launched dnsmasq running on a CentOS host when the firewall is running. When I turn off the firewall (CSF), the ...
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 ...
0
votes
2answers
2k 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 ...
0
votes
2answers
575 views

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....