Questions tagged [linux-kvm]
Linux Kernel Virtual Machine is a virtualization system (VM)
341
questions
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1answer
22 views
Are hardware drivers needed to be installed on the management OS of a type 1 hypervisor?
Type 2 hypervisors such as VMware Workstation run virtual machines on top of a host OS. Only the the host needs hardware drivers, while the guests do not as they are running on virtual hardware.
On ...
1
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1answer
21 views
KVM 2 VMs on one disk
Is it possible to create 2 VMs that share a CPU and 1 virtual disk (using KVM)? If so how would I go about it? I've looked online, but can't really find something that works in the command line.
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9 views
Broken RD on Windows 10 VM after software uninstall
Host: Debian 10
Guest: Windows 10
Hypervisor: QEMU/KVM (migrated from Virtualbox)
GPU Passthrough: Previously Nvidia on Virtualbox, currently AMD on QEMU/KVM
Issue: after migrating the VM from ...
0
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0answers
7 views
How to package a Vagrant Box from virt-manager/KVM
I have a VM foo created using virt-manager / KVM. I have vagrant 2.2.6 with the plugin vagrant-libvirt 0.0.45. I wish to package foo as a Vagrant box.
The documentation for vagrant package states:
...
0
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0answers
22 views
mac os kvm on linux an't boot into mac os instaltion
I am using linux
so I am trying to make a macos vm on linux using this https://github.com/foxlet/macOS-Simple-KVM/blob/master/README.md
using ./basic.sh
I can only boot to the uefi shell from ...
0
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1answer
14 views
Linux pings from VM on virtual bridge get sent, but not returned
I'm setting up a virtual bridge on my laptop, so I can connect multiple VMs to it as a virtual lab environment. I want my laptop to route packets from the bridge to my actual network interface so the ...
0
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0answers
21 views
KVM vm's dropping network connections
My entire network is wired, using ipv4 internally, dhcp6 for ipv6
I have a server running a Debian 9.x using KVM/QEMU to host vm's, let's call this mainserver.
On mainserver is a bunch of vm's ...
0
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1answer
29 views
Running a “usually not-virtualized Win 10” under Linux KVM : is it a good idea?
My desktop machine has the following setup:
First SSD : 512GiB for a Debian 10 Linux.
Second SSD : 256GiB for a Windows 10 installation.
I used to switch OS by rebooting when i need it.
Today, for ...
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0answers
16 views
linux kvm guest not booting
I have a ubuntu server running kvm. I have 2 guests. One is not booting and i cant figure out why. It says running but when i try to connect to it with virsh console it hangs. I get a unreachable when ...
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0answers
27 views
KVM/QEMU: How to receive multicast from NIC shown as `macvtap`
The question basically already is in the title.
I am running a KVM guest with Debian @ Kernel 5.4 on a server machine host with Debian @ Kernel 5.4 as well (so host and guest run pretty much the same ...
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1answer
114 views
RTX 2080 VGA QEMU/KVM VFIO Passthrough Windows 10 black screen after driver install
So I've spent the last 20 hours trying to get a Windows 10 VM running in QEMU/KVM on Ubuntu.
My hardware setup is:
Saphire Pulse Radeon RX 570 (Host)
MSI RTX 2080 Gaming Trio (Guest)
Ryzen 7 3700x
...
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0answers
17 views
Configure VLANs on Open vSwitch for use with Netgear GS728TPv2 Managed Switch
I have looked all over the internet and while I have found some documentation, I am still a bit confused about how to configure everything properly. So I am hoping that someone here will be able to ...
1
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1answer
16 views
Why is dmidecode returning “Bochs” for a VM running under QEMU?
In all information I've found Bochs and QEMU are two separate solutions for emulate/virtualize computers. So I got really confused when I got the results below in my Linux-VM running in QEMU.
root@...
2
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1answer
27 views
Emulating IDE in KVM in Debian 10
We have an old rack server with Windows Server 2008 (not R2)
Our goal is to virtualize it and move into new hardware.
The new PC has a Debian10 as a main OS with KVM enabled.
I have used disk2vhd (...
1
vote
1answer
68 views
GPU passthrough in Ubuntu 18.04
I'm trying to set up GPU passthrough for KVM.
I edited /etc/default/grub:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash iommu=pt intel_iommu=on video=efifb:off"
then run
sudo update-grub
and/or
...
1
vote
1answer
64 views
Run two instances of Linux on one server
I own a secondary PC that I’ve been using as a server, my friend has been using it to host game servers for stuff like “Counter-Strike: Global Offensive,” but recently I’ve been trying to use it as a ...
0
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1answer
46 views
Libvirt KVM networking, how to make guest accessible from outside with public IP?
Good afternoon, I've ordered dedicated server CentOS 7 from ISP. Also got 10 public IP addresses.
Have following situation:
Dedicated server IP is:149.XX.XXX.29/24
Default gateway: 149.XX.XXX.1
...
0
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0answers
183 views
QEMu / KVM: error: Unable to add bridge tap0 port vnet0: Operation not supported
In order to fully understand how the networking part works inside QEMU/KVM software virtualization environment, I decided to try to manually set up a the networking part, more or less simulating what ...
1
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2answers
42 views
My vm's don't communicate directly
I am French: sorry for my English.
I have a server with several virtual machines with failover IP (OVH).
Everything works fine, well, almost ...
My machines are connected in bridge:
bridge name ...
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0answers
16 views
Routing between linux bridge and openvswitch?
My scenario look like this:
https://raw.githubusercontent.com/lmq1999/123/master/VM.png
As you can see the Node1 use OVS and Node2 use Linux bridge (LB)
I need to make both KVM1 & KVM2 can see ...
0
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2answers
117 views
Shared storage in KVM doesn't sync
I have set up KVM on Debian 10 host.
There are 2 virtual machines running.
Virtual machine #1 has OMV inside it.
Virtual machine #2 has plain debian.
Each virtual machine is installed in its own ...
0
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0answers
65 views
centos 8 qemu/kvm virtual machine not working on ubuntu 18.04
My goal is to install centos 8 as a virtual machine on ubuntu 18.04 and be able to access the internet on the virtual machine and to access the host file system from the virtual machine. Ideally I ...
0
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1answer
20 views
Browser on host is started when starting it in a VM
Here is my setup:
My host system runs Ubuntu 18.04
I have a VM (also running 18.04) using libvirt/KVM
I connect to the VM using ssh -X 1.2.3.4
The weird thing is, if I run firefox in that SSH shell, ...
0
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0answers
150 views
Remotely SSH into Ubuntu KVM
Overview
I've create a KVM based virtual machine guest that is running Ubuntu Bionic Beaver server image on an Ubuntu Bionic Beaver host. Now that it is up an running, I'd like to have the ability to ...
0
votes
1answer
522 views
GPU passthrough no output
I followed this guide to setup a vm with pci passthrough.
My setup:
MSI Z170 Gaming M7
i7-6700K
GTX1080[Host]
RX580[Guest]
Host OS Manjaro KDE on 5.4
Guest OS Win10
I can confirm that the GPU is ...
0
votes
0answers
40 views
Proper way to move a pool with virsh to another partition?
The root partition is running out of space so i'd like to move the machines to another directory. They are currently on /var/lib/libvirt/images/, the pool is called images. The VMs are spun up with ...
0
votes
1answer
171 views
Virtual disk extremely slow for KVM guests
I have a relatively small server with a quad core CPU (Intel i5-7400) and 16 GB RAM (DDR4 though), running a couple of virtualised guests using libvirt. I'm not using any other intermediate layer such ...
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0answers
30 views
Tesla K40 Passthrough from Windows to Ubuntu
I have two GPUs, a RX 550 and a Tesla K40. I'd like too do a sort of KVM passthrough with the K40 to an Ubuntu virtual machine, if that's possible. I've heard of passthroughs being done on Ubuntu or ...
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0answers
62 views
CentOS 7 - Diagnose Why Port Forwarding Doesn't Work
I have a CentOS 7 server running KVM and I'm trying to forwarding a port from port 222 to port 22 of a guest (NAT/virbr0 network).
I'm aware that KVM causes problems for port forwarding with a NAT ...
0
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1answer
116 views
System Down KVM
I have an issus with my proxmox server. Sometime I cannot access to my server.
Ping or Ssh does not work, I have tried to connect my screen to the server to check what's happen but I have no image.
...
0
votes
1answer
66 views
How can I bridge br0 to wlp2s0 so virtual machines get a dynamic IP from router?
For static ethernet interfaces (eno1), I use the following (cat /etc/network/interfaces):
# This file describes the network interfaces available on your system
# and how to activate them. For more ...
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0answers
117 views
How to make qemu-kvm Guest OS read symbolic links from shared folder while connecting VPN through OpenVPN?
My qemu-kvm VMs are in Ubuntu 16.04 and QEMU emulator version is 2.5.0.
I want my VMs
to read/write from/into the shared folder (in which I created symbolic links from Host OS).
while the VMs ...
0
votes
0answers
99 views
KVM inside Docker inside Hyper-V
On top there is a VM created with Hyper-V. Inside this VM, we run a Docker container. Inside this Docker container, we run KVM. When trying to create a new Windows VM using this KVM, these errors are ...
1
vote
1answer
56 views
QEMU/KVM/libvirt macvtap VEPA not working - ARP request not forward
Hi I've been struggling to get guest networking working when using a macvtap in VEPA mode between two VMs on a host. I've spent hours (days) googling with no joy. Does this network configuration ...
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0answers
24 views
Is it possible to install CoreOS on KVM from URL?
For Debian, Ubuntu and CentOS you can use an online URL instead an ISO to install the system for example in KVM context.
Is same possible for CoreOS and what is the URL?
Example for CentOS:
...
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0answers
93 views
KVM not available
I am using a Ryzen 3 2200G on a Gigabyte B450 Gaming X. The BIOS is updated and in the settings SVM, AMD-V and IOMMU are enabled.
kvm-ok says KVM is enabled.
Output of lsmod | grep kvm:
kvm_amd ...
0
votes
0answers
205 views
qemu-system-x86_64: warning: hub 0 with no nics
I have trouble getting networking to work with qemu: I have set-up a bridge with dhcp that is already used by LXC containers and wifi clients:
br-lan Link encap:Ethernet HWaddr 00:E0:4C:68:36:37
...
1
vote
1answer
57 views
Can a KVM hyper-visor be also used as a normal PC
I am soon will be setting up a desktop soon for my day-to-day tasks and gaming usage. I would like to have it run Linux for my day to day usage, but have a Windows VM running on top of it for gaming ...
0
votes
0answers
30 views
libvirt USB passthrough device fails to connect at guest start
I have a desktop setup with
Host:
Ubuntu 18.04
libvirt 4.0.0
linux-4.15 generic
Guest:
Windows 10
USB keyboard (Corsair K55) in USB passthrough
USB mouse in USB passthrough
NVidia graphics card ...
3
votes
1answer
1k views
What is the difference and relationship between kvm, virt-manager, qemu and libvirt?
I investigated this topic and here are my conlusions (but still I have questions, and please correct me if I made any mistake in my conlusion):
VMWare:
VMWare developed its VM Hypervisor SW in 1999, ...
0
votes
1answer
384 views
Can't boot VirtualBox vdi virtual machine image converted to raw image in QEMU/KVM: not a bootable disk
I have a .vdi VM image created with VirtualBox and converted it to raw and qcow2 images like this:
VBoxManage clonehd --format RAW ./vm.vdi ./vm.img
qemu-img convert -f raw ./vm.img -O qcow2 ./vm....
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0answers
171 views
KVM: Unable to cut/paste between ubuntu host and windows 10 guest
host: ubuntu 19.04
Guest: Windows 10
I have Installed the latest version of spice-guest-tools and qemu-ga-x86_64 in the guest OS. The clipboard works with other guests. It does not work with this ...
0
votes
0answers
570 views
Enabling KVM Ubuntu 18.04 Android Studio
I installed Android Studio 3.5 and KVM acceleration but i couldn't enable it.
I saw this and tried :
Add the emulator command line options.
In Android Studio, go to Run > Edit Configurations.
To ...
0
votes
1answer
297 views
Making my KVM VMs accessible from the network
I'm setting up a new home server with borderline-paranoid security as the goal.
As such, everything with open ports that can go in a VM, gets its own VM. I'm using Ubuntu Server as the host, because ...
0
votes
1answer
60 views
How to set Rx queue = N in linux / in Qemu / KVM?
I have configured 8 multiple queues on my CentOS VM box (running on KVM).
<interface type='direct' trustGuestRxFilters='yes'>
<source dev='ens113f0' mode='passthrough'/>
<model ...
0
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0answers
205 views
Create snapshot in virsh for domain with two or more disks
I would like to back up the disks of a VM following the Live-disk-backup-with-active-blockcommit procedure at Libvirt Wiki.
I create an external snapshot with
virsh snapshot-create-as --domain ...
1
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0answers
115 views
KVM guest low cpu usage while host OS reports very high cpu load
I am facing this issue.
On a 18.04 host OS, i have one KVM guest with same image.
Host has 4 physical (8 threads) cores.I am giving 2 cores in the VM.
The problem is when the guest OS is having a ...
0
votes
1answer
477 views
How to make the KVM enable CPU flags（sse4_2）to the guest
My host is CentOs6.8, and the kernel is 3.10.0-957.el7.x86_64. I have installed KVM on it and I use KVM create my guests. And my guests works fine.
Now, I run some software or code on my guests. I ...
0
votes
1answer
33 views
very high ram usage in google cloud VM (linux)
I am running a virtual machine on google cloud platform with 20 cpu cores and 256gb of ram. As soon as i boot the machine, all the ram gets filled up (this always happens no matter how much ram or cpu ...
1
vote
1answer
2k views
How to increase display resolution in QEMU/KVM via virt-manager on Manjaro (host/guest)?
How to increase the guest's resolution in QEMU/KVM?
Currently, I am only able to reach a max resolution of 1280x720 on my guest virtual machine; however, I would like to increase it to 1980x1080 to ...
