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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.

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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: Write to temporary files instead of disk image files.…
user34480
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virsh autostart not working

root@virtual3:~# virsh autostart nstest Domain nstest marked as autostarted root@virtual3:~# virsh dominfo nstest Id: - Name: nstest UUID: 8cf691cd-7246-442b-a26b-3580e24600c5 OS Type: hvm State: …
David
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how to allow outgoing traffic with firewalld / libvirt on CentOS 8?

I installed a CentOS 8 guest on a CentOS 8 host using libvirt. However firewalld is blocking all outgoing traffic from the guest to the internet unless I use target=ACCEPT for the libvirt zone. The datacenter provides two separate IPv4 addresses for…
Felix Schwarz
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Windows 10 KVM guests cause Ubuntu 20.04 host to crash (revised)

I got extremely confused and decided to re-write the question from scratch, so if some of the comments do not make sense, that is why. Apoplogies to anyone whose time I wasted. I am having a problem with my entire system freezing when using KVM…
Stonecraft
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How can I make my libvirt/KVM guest see all IPv4/UDP multicast traffic?

I have an issue with IPv4/UDP multicast traffic not being fully visible from within a KVM guest. The guest has a dedicated NIC which is attached using MacVTap. Both the host OS and the OS in the guest are Ubuntu 18.04. This is the VM’s network…
aaronk6
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Migrating from libvirt + iptables to libvirt + nftables

I'm about to migrate a Debian Stretch host using qemu-kvm to Debian Buster. I've seen people complaining on the Internet about issues due to nftables becoming default in place of iptables and libvirt using iptables rules. Rules automatically written…
Jérôme
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Create iPXE UEFI bootable image for QEMU/Libvirt with custom next-server and filename

I can create a VM with libvirt/qemu to boot in UEFI mode. I know that it does iPXE by default, but I want to create/modify a iPXE image in order to override filename and next-server properties. How can I do such thing? EDIT: I tried the…
djuarez
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How to assign VM hostname by definition in libvirt virtual network interface

Fedora 30 Workstation Host, Fedora 30 Server (netinstall) Guests. I am not an expert in all this super-crazy Linux networking stuff and reading a ton of materials there and there. So I have libvirt virtual network interface: …
Dzintars
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libvirt-lxc container on Debian buster with user namespacing not always startable

I have a bunch of libvirt-lxc containers whose configuration I migrated from Debian jessie to a fresh Debian buster host. I re-created the rootfs’ for the containers using lxc-create -t debian -- --release buster and later remapped the uid/gid…
Jonas Schäfer
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Libvirt lxc-enter-namespace with mapped uid/gid

I'm trying to implement LXC with mapped uid/gid (user namespace) under Libvirt on CentOS 7 with full separate root mounted. Libvirt config snippet
Dima
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qemu process memory usage greater than guest memory usage

I have a physical machine with 24 GB RAM hosting a few VMs using libvirt-qemu. When creating VMs, I assign a lot of memory and no swap, so that the total of assigned memory can be greater than the physical memory on the host, and the swap is managed…
Jérôme
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macvtap libvirt guests have no network connectivity after server migration

I have two dedicated servers hosted by OVH, an SP-128 and an MG-512. The hardware is similar (they are both Supermicro-based builds) but the SP-128 has a Xeon E5 Ivy Bridge and 1 Gbps Ethernet; the MG-512 has dual Xeon E5 Haswell and 10 Gbps…
allquixotic
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Is it possible to make OpenSSL work with gnutls?

I have libvirt, one client and one server. Libvirt uses gnutls implementation of tls. I want to use mitmproxy and put in the middle between client and remote server. But mitmproxy uses different implementation of tls - openssl. I read that their…
Anastasiya Ruzhanskaya
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XP KVM stuck at "Booting from Hard Disk"

Just to see if it could be done (and if so, move other physical XP machines to VM environments), I took the hard drive out of a decommissioned laptop, captured a WIM of it, and applied it to a QCOW2 disk. It fails to boot. It's stuck at "Booting…
user38537
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Mount URL as cdrom/iso KVM/QEMU

I am looking for a way to mount an ISO as a cd rom, according to libvirt docs (referenced below) it should be possible, additionally in the question referenced below. I am aware of this question, however its 4 years+ old and never actually came to…
Backtogeek
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