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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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 ...
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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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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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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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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 ...
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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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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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153
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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 ...
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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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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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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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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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131
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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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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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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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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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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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111
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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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97
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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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135
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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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247
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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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55
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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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153
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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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356
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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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728
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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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144
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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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55
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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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157
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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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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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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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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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887
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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 ...
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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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How do I find architectures supported by an emulator for use when defining a libvirt domain?
When creating a libvirt guest using XML, how do I determine what 'arch' values are valid for <domain><os><type arch=?>? The problem is, for example, arm is invalid and must be armv7l ...
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XML for Qemu `-nic user,model=virtio-net-pci` Network
How do I specify a network interface in libvirt XML that is equivalent to the qemu-system-* argument -nic user,model=virtio-net-pci. I have a variety of qemu machines (without KVM) that happily boot ...
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412
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libvirt/qemu VM freezes when migrating between specific hosts
I have several servers (different ages) running on Ubuntu 22.04 with QEMU and libvirt.
When migrating VMs between some of these servers, the VM immediately freezes on the target system.
Tested guests ...
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129
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Keep specific vnet(xx) adapter on host system for VM the same after VM shutdown/reboot
Upon a shutdown and reboot the vnet(xx) adapter assigned to the VM from the VM host changes.
Is there any way to keep it a specific vnet(xx), for example vnet20 after it's shutdown for whatever reason ...
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473
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Libvirt routing between two NAT networks
I have following two networks,
<network>
<name>subsys-network</name>
<bridge name="virbr1"/>
<forward mode="nat"/>
<ip address="192....
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libvirt: how to use host OpenVPN connection
I have Ubuntu 22.04 with OpenVPN connection to remote network. I also have some number of VMs running on my machine. All of them are using one Virtual network to connect each other. Not all VMs ...
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474
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KVM Networking - assign IP to each VM by outside DHCP
I am new to KVM and am having a problem with setting up the networking. I want each VM to get its IPs assigned by the network's DHCP, not the internal DHCP that the KVM keeps trying to set up. In ...
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1
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`virsh -c qemu:///session list --all` lists VMs created in `QEMU/KVM` connection, but misses VM from `QEMU/KVM User session` of Virt-Manager
# virsh -c qemu:///session list --all lists only VMs created in QEMU/KVM connection (system !), but misses VM I've created in QEMU/KVM User session in GUI of Virt-Manager. Why? From below I unserstand ...
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121
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Blocking mac spoofing on libvirt guests using openflow
I have a couple of kvm vms running with libvirt and they are using openvswitch bridges. I need a mechanism to prevent mac spoofing on a guest. I tried libvirt filters no-mac-spoofing and clean-traffic ...
- 29
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115
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libvirt guest cannot be reboot within itself or from host
I have a guest(debian9) created by:
virt-install --name vm --events=on_reboot=restart,on_poweroff=restart,on_crash=restart --disk /opt/debian9.qcow2 --import
acpid is installed in guest.
If I reboot ...
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90
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Cannot ping/SSH VMs from Host created into Xen VM (guest) on VirtualBox hostonly network and bridged interface
I have a network related issue. Here the description of my prototype :
|=========================VirtualBox==============================|
| |======== LibVirt ==...
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