Questions tagged [kvm-virtualization]

Question 1

I'm trying to clean up the testing workflow for a project I'm working on, a database built on top of io_uring and NVMe. Right now I'm using KVM and its NVMe device emulator to power the dev ...

Question 2

I´m trying to setup a new installation of Ovirt 4.5.5 During the processe of deployment, it fail at this point: [ INFO ] TASK [ovirt.ovirt.hosted_engine_setup : Wait for the host to be up] Analyzing ...

Question 3

We would like to export/migrate a old SAP ERP server from AWS to our on-premise Proxmox Server. I have not had much experience with AWS, but with different on-premise Hypervisors. I therefore thought ...

Question 4

I run several VMs on QEMU KVM. For some reason, after I pause a VM, it still shows as consuming RAM in top/htop and doesn't free the resources. The virsh output confirms that the VM is paused: > ...

Question 5

So, I'm trying to start a VM remotely on a server located on my local network (Headless Debian 12) using another PC with Debian and Virt-manager installed. I have successfully connected to the server ...

Question 6

After creating a VM, the VM cannot access the Internet. In Hypervisor RHEL 9.4: I created management network: virsh net-dumpxml management <network> <name>management</name> <...

Question 7

Planning on installing a new Ceph cluster for an existing client. This client is already deep into using qcow2 images for their current virtualization solution. I've found a Red Hat article (RH ...

Question 8

I'm running Windows in VM on Linux. I have a backing (base) file and upper layer (qcow2). Since last upper layer creation it grew to a large size. I've mounted the disk with guestmount and summed up ...

Question 9

When you setup a Windows guest on KVM/QEMU you can choose between different video devices, most used seems to be QXL, VirtIO or VGA. Which give the best performance when you connect to the guest using ...

Question 10

I've created a service that sets 4addr on for my Intel ax210 wireless adapter (following this guide https://community.clearlinux.org/t/wireless-nic-bridge-for-kvm/5848/3) when my Rocky Linux 9 server ...

Question 11

0 I have a Linux Ubuntu Server 24.04 running very nicely on some moderately old hardware, with an AMD CPU. I am able to run a Python program that uses polars without problem. I have installed a QEMU/...

Question 12

I use kvm/qemu on Linux and usual setup is having backing image and running top image that tracks changes (qemu-img create -f qcow2 -F qcow2 -b backimage topimage). I'm concerned with growth of those ...

Question 13

I installed a VM with Ubuntu Server 24.04.2 LTS on KVM. When I open virt-manager and I start the VM domain everything works but when I close virt-manager and I open it again I can't type, in the ...

Question 14

I have two HPE G9 DL380 dedicated servers with the exact same hardware specifications. One is running VMware Esxi 7 update 3 and the other is running KVM Virtualizor. Both these dedicated servers are ...

Question 15

I'm trying to automate some Windows machines using terraform and libvirt on my Ubuntu machine. For the Windows machines, I have the ISO files and licenses for them. Now my goal is to try to convert ...

Question 16

I have Zen 3 based server on WRX80 platform (24c/48t). I'm using it as KVM/libvirt hypervisor with statically pinned cores to VMs (nohz, isolcpus). I recently noticed issues with thermal tripping. At ...

Question 17

We have encountered an issue on a system with a fresh installation of Ubuntu 22.04.5 LTS, where editing /etc/netplan/50-cloud-init.yaml and applying the changes with netplan apply does not persist ...

Question 18

today when i logged into one of my machines i am not able to do virt-manager as soon as i do that it freezes up nothing shows up however this was working fine 1 week ago i also have a test machine ...

Question 19

On Ubuntu server 24.04 with public IP I have installed KVM and make virtual machine with Ubuntu 24.04 and install nginx , which may be reverse proxy for other machine in my KVM. I use iptables on KVM ...

Question 20

Does anybody here use Iptables with KVM VPS hosting Linux? I used to be able to do this with a Linode nanode back in the day, pre 2022, but not anymore. Adding firewall rules to limit SSH access to my ...

Question 21

I have trouble understanding permissions with QEMU/KVM images in storage pools. My machines store their QCOW2-Files in an LVM thinpool device. Here are the relevant parts: vgdisplay machines --- ...

Question 22

I have developed a web application using Laravel and PostgreSQL as the database. The main function of my application is to process large volumes of data from the database, with tables ranging from a ...

Question 23

I am currently experimenting with wifi. Basically I have a specific use case for running the wifi dongle in a guest vm. The WiFi dongle is a U.S. Robotics USR5423 802.11bg Wireless Adapter [ZyDAS ...

Question 24

qcow2 image on VM host: # ls -l vdisk.qcow2 -rwxrwx--- 1 qemu qemu 31388270592 Feb 6 11:59 vdisk.qcow2 qemu-img info: # qemu-img info vdisk.qcow2 image: vdisk.qcow2 file format: qcow2 virtual size: ...

Question 25

i'm experiencing this issue across differents physical server, let me describe it better. PHYSICAL HOST OS: Rhel 8.10 (also tested on rhel 8.8) VM OS: Rhel 8.10 I've created a lot of VMs based on RHEL ...

Question 26

I have the following setup: ------------------------------------------------------------------------------------------ |Host ...

Question 27

I have just installed a Fedora 41 server for the first time (all my previous experience was with Debian-based systems), and I'm taking Cockpit and KVM for a test drive. I've (from the Cockpit-machines ...

Question 28

I had a bare metal Ubuntu Server installation. I created a full disk image with dd and converted to qcow2. qemu-img convert -O qcow2 full_disk.dd.img full_disk.qcow2 Then I have installed a fresh ...

Question 29

(I originally asked this on SuperUser, but I think it is misplaced there, so I'm re-asking this here with some additional information; in any case sorry for cross-posting) TL;DR My host is used for ...

Question 30

I'm trying to run a KVM/QEMU VM under RHEL9 that uses a virtualized Infiniband card (VF) through SR-IOV from a pool of VFs. I can specify a certain VF's PCI device with hostdev and that works just ...

Question 31

I have Intel Software RAID (Intel® VROC) configured on my Red Hat host machine, and I would like to access its status etc within a Debian-based KVM guest VM. [root@localhost ~]# mdadm --detail-...

Question 32

I am using OL9.2 and libvirt version: 10.0.0 I am trying to add an vm to autostart with sudo virsh autostart <vm_name>. On host reboot vm did not start and virtqemud shows this log: virtqemud[...

Question 33

A VM setup with the libvirt terraform kvm provider doesn't get an IP address from my dhcp server. It still gets an address but isn't listed on DNS, which is an issue for the machines to communicate. I'...

Question 34

I'm working with Ubuntu 24.04 Desktop and I created a VM connected to the default libvirt-NAT-Bridge and a second isolated network. The bridged network is virbr0: 192.168.122.0/24 the host got 192.168....

Question 35

I've observed that several processes, including Acronis, MySQL, Java applications, and Journal D, are frequently entering the D state. This state seems to be related to paging, specifically to KVM ...

Question 36

In order to be able to script VM generation on our Debian 11 QEMU/KVM hosts I wrote a little python script which uses virt-install to setup new virtual machines (with OS Ubuntu 22.04). In those VMs ...

Question 37

I'd like to run multiple docker-android instances in docker swarm. But they fail: ERROR | x86 emulation currently requires hardware acceleration! https://developer.android.com/studio/run/emulator-...

Question 38

after a kernel upgrade with out debian servers we went through reboots and have since then problems with obe of our KVM hosts. On the host itself everything works, but on the guests there is no ...

Question 39

I am unable to access a KVM over the network when its network is a bridge with a bonded interface as a slave. Here's how I create bonded interface bond0: sudo nmcli connection add type bond con-name ...

Question 40

I am new to Red Hat Enterprise Linux (RHEL). I have installed RHEL 9.4 on an Intel Core i7 13th Gen machine and prepared a Debian 12 virtual machine (guest) using KVM. Within the Debian 12 guest, the ...

Question 41

I got 4xVM in Proxmox instance on my testbed and all the guests VM are running ubuntu 24.04. On proxmox I have installed grub2 as boot loader/manager. I would like to boot one selected system (using ...

Question 42

I'm unable to automate installing Rocky9 Linux on a KVM. I am using Kickstart to automate the installation. Instead of the install being automated, the installation screen is shown if I log into the ...

Question 43

When we create a default bridged network in Libvirt it create a bunch of interfaces: virbr0 with an IP 192.168.122.1/16 vnet0 with no IP address showing up as it is "plugged into a VM". ...

Question 44

A have installed Debian 12 in an machine who services as a kvm host to 2 guests which are an Ubuntu 22.04 and an Windows 10. Sometimes the Debian crashes. Initially the video is lost and the cpu ...

Question 45

We are planning to migrate away from VMware ESXi for our company servers. We have a LOT of Windows virtual machines used for testing (different configurations, combinations of options, etc) in our ...

Question 46

Quick overview of the situation I have a Fedora host on which there are multiple NICs and VMs (QEMU/KVM/LibVirt). Each guest accesses the internet via a virtual bridge that operates in NAT mode and ...

Question 47

I'm using KVM virtual machine on Debian 12 and I want to use the default virtual network. First, the default network was missing virsh net-list --all so I reloaded it: virsh net-define /usr/share/...

Question 48

I am here to ask for help about integrating VLAN, Linux bridges and KVM. So, let me start with the setup I am trying to put in place. I have a network switch with a couple of links to a KVM server. On ...

Question 49

I'm trying to run Bliss OS through QEMU by following this guide: $ qemu-system-x86_64 \ -enable-kvm \ -M q35 \ -m 4096 -smp 4 -cpu host \ -bios /usr/share/ovmf/x64/OVMF....

Question 50

Is that possible to delete a snapshot from a QCOW2 image without shutting down a virtual machine (QEMU+KVM)? Wouldn't running qemu-img snapshot -d ... break data consistency? If so, would that break ...