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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.

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

libvirt runs on Linux, Solaris and Windows.

libvirt supports the following hypervisors: KVM/QEMU, Hyper-V, VMware, Xen, VirtualBox, OpenVZ, LXC, User Mode Linux, and others.

libvirt suports the following storage: local file images, raw disk storage, LVM, FibreChannel, iSCSI, NFS.

610 questions
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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 machine and invoking…
rascher
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Import XML into libvirt without booting virtual machine

Is it possible to import an XML file into libvirt without having libvirt boot the virtual machine? If I do: virsh create centos63.xml Then libvirt will import the XML file and immediately try to boot the image, and this isn't what I want. (I have…
Lorin Hochstein
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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 its mac, this is configured like this: …
theomega
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Networking between KVM VM and docker container on same host

On a Debian-Stretch host (connected to physical LAN) I have a new docker installation (v18.09) with one database container (port mapped to the host) and I run KVM/libvirt with some Debian-Stretch VMs. I can access the docker container and the VMs…
sdittmar
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WARNING KVM acceleration not available, using 'qemu'

Running debian (Linux Rick 3.16.0-4-amd64 #1 SMP Debian 3.16.7-ckt11-1+deb8u6 (2015-11-09) x86_64 GNU/Linux) Looking at my cpuinfo I can see I have vmx support: flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush…
red888
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How can I change Qemu KVM machine architecture from 440fx to q35 with virsh edit or virt-manager

Still trying to get GPU passthrough working and decided to change machine type from older 440fx to q35 ie pc-q35 but if I do virsh edit on the config it refuse to save saying "PCI Bridges not supported"... by current qemu binary. What do I need to…
htfree
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libvirt network error - no 'default' network device found

My original purpose is to create centos image for openstack. Although I did directly with kvm, still wondering about error. Was using this manual for my task. After this command: # virt-install --virt-type kvm --name centos-6.4 --ram 1024…
holms
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How to add virtual storage as SSD in KVM

Being previously a VirtualBox user, I moved to KVM(QEMU/libvirt or whatever it's called) recently. I know that in VirtualBox, when you add a new storage device to the VM, there is a checkbox labeled Solid-state Drive, if checked, the guest system…
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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 DRBD 8.3.11 qemu-kvm…
PythonLearner
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How do I prevent libvirt from adding iptables rules for guest NAT networks?

Similar to this old request on BugZilla for Fedora 8, I'm hoping something has changed since then or someone knows another way. I want to manage the iptables rules by hand—the one-size-fits-all automatic rules don't suit me at all. These rules seem…
user83664
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Mapping USB drive direct to libvirt KVM virtual machine?

I am searching for information on mapping an existing drive (USB drive) to a KVM virtual machine using libvirt. I have been going over http://libvirt.org/formatstorage.html#StoragePoolTarget. But I don't quite understand what options are needed to…
Andy Shinn
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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 . Still, it attempts to boot from the harddrive instead of the cdrom. I know I have an ISO image loaded on the CD-ROM virtual…
Belmin Fernandez
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How to repair a broken-resized qcow2 disk image for libvirt/kvm?

Today I wanted to increase the size of a VM, so I did what I always do (have done it before): qemu-img resize diskimage.qcow2 +22GB Then the file broke and the VM does not start any more. I tried booting the VM from CD to adjust partitioning but…
Ned64
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virt-install cannot use ISO file as location

I am using the following script to install a new Fedora Server virtual machine virt-install \ --name theta-1 \ --ram 8000 \ --disk path=/dev/vg/t1.img \ --vcpus 8 \ --os-type linux \ --os-variant fedora25 \ --network bridge=br0 \ --graphics none…
Germano Massullo
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attaching usb dongle to KVM VM

I'm struggling to connect a usb device, that gets detected correctly by the host, to a kvm vm. I have a freshly installed Ubuntu Server 14.10 as KVM/QEMU host. I set up an Ubuntu vm using this command: virt-install --connect qemu:///system \ …
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