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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Cannot share an NFS directory with a Fedora host on Vagrant/libvirt
I am running a Fedora machine with Vagrant over libvirt:
# -*- mode: ruby -*-
# vi: set ft=ruby :
# All Vagrant configuration is done below. The "2" in Vagrant.configure
# configures the ...
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1
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Libvirtd TCP port 16514 queries
I have a server that is running libvirtd. I just checked libvirtd ports and see below output. I wondered Why port 16514 PID is always 1 and why tcp6 is handling ipv4 with multi connections.
Can anyone ...
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systemd: How to wait for a network device provided dynamicly at runtime?
We have a server (hypervisor) hosting many virtual machines controlled by libvirt. libvirt provides a virtual network for communication between the virtual machines and the hypervisor. This virtual ...
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1
answer
81
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Create a VM from snapshot use /dev/VDA instead /dev/SDA
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We have an OpenStack instance configured with multiple images, including CentOS, Redhat, and Ubuntu. When creating a new instance, the root partition attaches as SCSI without any issues. All images ...
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AppArmor issues with Libvirt
I have a fresh Ubuntu Server 22.04.3 and Debian 12.1.0 installed and updated. Along with Cockpit and Cockpit virtual machines on both tests machines.
I am getting the following errors and warning when ...
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147
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Apparmor and libvirt - warnings and errors
I have a fresh Debian 12 installed and updated. Along with Cockpit and Cockpit virtual machines.
I am getting the following errors and warning when looking at the log section in Cockpit:
Failed to ...
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1
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62
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windows 2019 unattended install on kvm via libvirt can't find licence error
I'm trying to install windows server 2019 with autounattend.xml configuration on kvm via libvirt.
Installation fail on dialog with sign: "Can't find microsoft software license terms"
Despite ...
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105
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Libvirt - UDP not working between host and VM
Host: 192.168.1.144/24
VMs(routed) network: 192.168.122.0/24
I have VMs connected to libvirt's routed network.
<network>
<name>routed-122</name>
<uuid>86ca64a6-7fea-4cf8-...
- 165
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83
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Converting QEMU Solaris VM to libvirt
I have a QEMU VM running Solaris 2.6 on a SPARCstation-5 machine. I currently start it with the following command:
qemu-system-sparc \
-name sunvm \
-machine SS-5 \
-m 256 \
-drive file=sunvm.img,bus=...
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2
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87
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How to access service from virtual machine of another machine in local network?
I have two Ubuntu machines A and B in my local network.
Computer B has an openmediavault instance set up via KVM.
Computer B has the IP address 192.168.177.58, the openmediavault instance provides a ...
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Cannot establish an IPv4 connection from my bridge to an external node on the same network (IPv6 works tho)
I am currently trying to build a little lab for testing purposes:
I have a Linux Host-System (currently Arch-Based)deploying 2 vms, abridge with an assigned NIC and a CISCO Router that is directly ...
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81
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Networking KVM virtual machines to VLAN interface on host
I have a VLAN interface (enp98s0f0.4000) set up on my KVM host, which is a Hetzner dedicated server. The VLAN is set up to route through a Hetzner vSwitch, and I can ping out to Cloud instances ...
- 111
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network does not work for VM after a while, only resolves after changing MAC
I have installed pfSense as a KVM guest in a Debian 11 host using libvirt.
The host has two interfaces. One is attached to the VM using macVLAN driver, and serves as pfSense's WAN interface. The other ...
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96
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Machine type issue when migrating KVM VMs with live snapshots from Debian to Ubuntu
I'm trying to migrate around 40 KVM VMs (containing a few hundred live snapshots mostly used for automated testing on Windows) from a Ubuntu 22 server to a Debian 11 server. The machine type of most ...
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How to make KVM guest configs persistent across reboots/shutdown
I create a KVM Guest VM (virsh define a.xml, virsh start a.xml). Guest uses pre-configured/pre-made QCOW2 disk image, which represents a virtual router (Arista vEOS). Host is Redhat 9.1. Guest is ...
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Connect (create ethernet link) between two VMs using their assigned SR-IOV Virtual Functions (VFs)
I have two KVM virtual machines created on RHEL9. I partitioned an SR-IOV-capable Physical NIC such that I was able to get Virtual NICs (Virtual Functions) from it. For each VM, I assigned it a VF.
...
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364
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How do I route ALL VM (qemu-kvm, libvirt) traffic through proxy running in Host?
Host: Ubuntu 20.04
Proxy Client and Server: V2ray
Proxy Client connecting to Server and is available in the host on 127.0.0.110808 for Socks and 127.0.0.1:10809 for http.
VMs: Multiple vms running ...
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2
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2
answers
369
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Strange issue with bridges on Ubuntu server and libvirt; looks like MAC address conflict
We have been using bridges and libvirt VMs for a long time (starting with Ubuntu 16.04). Recently, we have encountered a problem with bridges (on VLAns). We have not yet identified what conditions ...
- 131
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Can you use virsh to reset vm id sequence? [duplicate]
Question in regards to "Id" for running VMs, using virsh running local Qemu VMs.
command virsh list will bring up a list of the current running VMs defined, eg,
Id Name State
--------------...
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110
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qemu set different dynamic ip address for each machine
I need to run about 7 virtual machines via qemu at the same time. The problem is that they all have the same public IP address as the host. Is there any way to give them different ip addresses? host ...
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new VM's won't complete after I moved /var/lib/libvirt/images to a larger disc
I have been building VM's on my fedora 37 server for a while, when I suddenly started running out of disc space. So, I looked in the filesystem and saw that the new VM's had their discs built at /var/...
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On system startup, libvirtd fails with "Network is already in use" error
I'm configuring a new system to host VMs with libvirtd (AlmaLinux 8.9, 4.18.0-425.13.1.el8; libvirt 8.0.0-10.2) and I'm seeing a weird behavior when I reboot the system.
On boot, libvirtd fails to ...
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1
answer
354
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How to use more then 2GB of ram when using running a nested BIOS VM using KVM
I have a Linux host running Debian 11 and on that host, I have a Ubuntu 22.04 VM. Inside that VM I want to run a Windows 10 VM using nested virtualization. The ubuntu VM is booted using EFI and nested ...
- 111
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167
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Occasional packet loss between bridge interfaces
I have two virtualization servers based on libvirt and KVM. And sometimes I see packages get lost on one particular virtual machine. After restarting the virtualization host this problem is solved, ...
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84
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Virtualized Centos 7 on Ubuntu host: very slow I/O
I run a Centos 7 virtualized in Ubuntu 20.04. There is a huge I/O performance drop in the VM compared to the host. The host has plenty of RAM.
Host:
* MB/s = 1,000,000 bytes/s
* KB = 1000 bytes, KiB = ...
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212
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How to create a shared Disk with the image stored on Host in KVM?
I am currently trying to setup a disk, using the raw img format on the host, which is then shared between multiple guest VMs (which are running Alpine Linux), using the libvirt / KVM virtualization ...
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120
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Backing encrypted drive
Creating a backing image for the master image that is encrypted using LUKS:
qemu-img create -f qcow2 -b dev.qcow2 -F qcow2 -o encrypt.format=luks,encrypt.key-secret=dev --object secret,id=dev,data='...
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Forcing static IP on libvirt
I've seen this question and others online, yet my problem persists.
I have a gentoo host with the following interface:
virbr0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet ...
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163
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libvirt virsh not using a predefined target while attaching interface
I am trying to automate the process of creating a Guest VM. I am using uvt-kvm to create the VM. I am also taking a network type as a parameter. This can be either nat or macvtap.
Now in the script I ...
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How do I force Virt-Manager to use the hosts' llvmpipe renderer so the guests get to use 3D acceleration?
I'm using virt-manager and set "3D Acceleration" as per what was recommended, but I'm getting this error:
qemu_gl_create_compile_shader: compile vertex error 0:2(10): error: GLSL ES 3.00 is ...
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Is it possible to use the IO priority from a KVM guest on the host?
When I use KVM with libvirt and virtio block devices, does it propagate IO priority in some way? If the guest starts a process with ioidle priority, I want it to run only if the host is also in ioidle ...
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138
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How to combine the firewalls for libvirt and ufw correctly
I am trying to use libvirt and ufw at the same host, but both of them insert a lot of firewall rules and own tables and they don't always play nice togethter.
The last problem I had was that ufw ...
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401
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libvirt live storage migration but keep vm on same host
Is libvirt capable of doing a live storage migration but keep the VM on the same host?
I have two NFS Network filesystem pools on one host. I would like to live migrate the underlying qcow2 disk files ...
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118
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how to enable virsh console a ubuntu domain
Environment description:
host:
libvirtd (libvirt) 6.0.0
os version: 20.04.2 LTS (Focal Fossa)
guest:
os version: 20.04.2 LTS (Focal Fossa)
Problem description:
I tried to follow https://wiki.libvirt....
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198
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Libvirt IPv6 routing to nated network
I'm having trouble getting IPv6 to work for my KVM/qemu guests.
I have two bridges setup, one routed (external, non libvirt) bridge for public dedicated ipv4 + ipv6 which works for both protocols.
...
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129
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Assign outlet IP for a libvirt VM using routed network
My host network interface has got two IPs. Currently, I'm running my VMs in a routed network.
Host's network interface is a member of public zone in firewalld, with both forward and masquerade enabled....
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1
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262
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Ansible Findall capture groups and list
I think I'm confused with Python and Ansible findall. Can I use capture groups in Ansible? For example, How can I capture group 1 and group 2 then reverse the position in the resulting list?
For ...
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347
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rhel 9, firewalld(nftables backend), libvirt and custom bridges, masquerading not working
I have a remote server with one network interface, which has a public IP address (enp5s0).
I've created an isolated network as follows:
<network>
<name>LAN-bridge</name>
<uuid&...
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76
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RTSP Stream Cannot Be Accessed from KVM Guest using NAT - iptables forwarding
How should iptables on the host be configured to allow rtsp:// traffic from a KVM guest that initiated the connection via a NAT network interface?
It doesn't appear to be a simple mapping. I don't ...
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183
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KVM/QEMU Virtualization on server with multiple nics to WAN - full split?
long time reader, first time poster...it's been over a decade, crazy.
Today, I've set up a left over server from my old job in a local data center for a friend of mine and myself.
As by my contract, ...
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572
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libvirt/KVM 10Gb-capable network interface without virtio
Is there a way to set up a 10Gb-capable virtual ethernet port in a guest VM (RHEL) without using virtio ?
I have to put some kind of RHEL7 in a guest VM but the kernel used in there has UDP ...
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1
answer
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Understanding Current/Maximum allocation of VirtManager (LibVirt)
When I first saw the UI in VirtManager, I thought "Maximum" is the amount of ram that appears to the guest, and "Current" is the reserved RAM when the VM starts. I thought that ...
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1
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206
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Forward virbr0 (VM) traffic through IPSec tunnel
I have a virbr0 interface, created by libvirt with
inet 10.1.2.1 netmask 255.255.255.0 broadcast 10.1.2.255
There's an active IPSec tunnel with
leftsubnet=10.1.2.0/24
rightsubnet=192.168.160.0/20
...
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87
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needrestart doesn't restart libvirtd.service
Running needrestart repeatedly gives me this line:
Restarting services...
systemctl restart libvirtd.service
Restarting the service with systemctl does not solve this problem.
Not even killing /usr/...
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1
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229
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Linux Livirt/KVM: Place all VMs in cpuset by default without reconfiguration
I'm trying to set up a system whereby I have some process on a set of hosts that are in one (shielded) cpuset, while everything else (i.e. all the VMs) are in another. The goal here is to have a ...
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34
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Faulted PCI device causes system to hang, unable to reboot
I run a hypervisor with multiple PCI devices that get passed into the hosted Virtual Machines.
I recently encountered an issue with one of the physical cards which caused it to stop responding, and ...
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205
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Why libvirt ignore secure boot flag?
In libvirt version 6.0.0
I have following configuration
<type arch="x86_64" machine="pc-q35-4.2">hvm</type>
<loader readonly="yes" secure="no" ...
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1
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512
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how can I boot from usb device in libvirt qemu machine?
I pass-through a usb device like this:
<hostdev mode="subsystem" type="usb" managed="yes">
<source>
<vendor id="0x067b"/>
<...
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1
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2k
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libvirt with qemu guest, bridged networking does not work
I am trying to get a VM operational and working so my router can forward a high port to its SSH, allowing someone on the Internet to connect to the VM. I am familiar with how to make that part of it ...
- 239
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79
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How can I blockpull an inactive domain?
For active domain I can do virsh blockpull --domain ... --path ... --base ... I would expect the blockpull should also work with inactive domain since it should be even easier (there is no write ...
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