Questions tagged [kvm-virtualization]
KVM (for Kernel-based Virtual Machine) is a full virtualization solution for Linux on x86 hardware containing virtualization extensions (Intel VT or AMD-V). It consists of a loadable kernel module, kvm.ko, that provides the core virtualization infrastructure and a processor specific module, kvm-intel.ko or kvm-amd.ko. KVM also requires a modified QEMU although work is underway to get the required changes upstream.
2,419
questions
0
votes
1
answer
32
views
Hiding physical hardware changes from VM guest
I'm running a Windows guest under Proxmox VE 8.2 (on Debian 12) and would like to hide information about the underlying physical hardware from the guest.
Motivation
I have paid full price for a ...
- 103
0
votes
0
answers
11
views
Link-local IPv6 address unpingable through guest VM
We have multiple virtualizor based KVM VM provisioning hosts and none of the VMs can ping link-local IPv6 Addresses. To simplify:
VM <--> VM Host: working
VM <--> VM: not working
VM <--&...
1
vote
2
answers
84
views
libvirt port forwarding to guest: What changed with 10.4.0?
Network/Firewalls isn't my strong side, so there is the possibility that I'm making a very basic mistake.
I need to access services running inside my qemu guest system from other devices in my network....
- 11
-1
votes
0
answers
48
views
Windows Server 2019 unexpected restart after CPU core increase
We recently moved our old Windows VMs from centos8 qemu/KVM to a new server with Alma Linux 9 running qemu/KVM.
After moving the VM's, we increased our core count for the Windows VM to 64 cores from ...
- 1
1
vote
1
answer
44
views
Solved - port-forwarding to KVM VM on Ubuntu
I,m configuring port forwarding to KVM VM on Ubuntu 22.04.
I can connect to VM from outside of host server. But it failed from VM itself.
my host's IP : 222.222.222.222
vm's IP : 192.168.122.201
...
- 11
0
votes
1
answer
52
views
How to VLAN tags for virtual machines with Open vSwitch, the internet is not connected
I installed the OVS package and created a bridge. When I connect the VM to that bridge, the internet works within the virtual machine. For example, I want to use VLAN tags like 100 and 200 within each ...
- 1
2
votes
0
answers
25
views
KVM CPU Passthrough Frequencies
I am looking at a KVM server and client, and noticed something I don't really understand and I'm hoping someone can enlighten me/point me in the correct direction.
cat /proc/cpuinfo shows - among ...
- 6,374
0
votes
0
answers
42
views
internal error: failed to start qemu binary /usr/bin/qemu-system-x86_64 for probing : qemu-system-x86_64 : cannot create PID file
Cannot Start VM. observing following error
internal error: failed to start qemu binary /usr/bin/qemu-system-x86_64 for probing : qemu-system-x86_64 : cannot create PID file
0
votes
0
answers
27
views
"No boot device" after migrate VM from XenServer to Promox
XenServer 8.2
Promox 8.2.2
My VM OS: Red Hat Enterprise Linux Server release 5.4 (Tikanga)
After I export vm from XenServer then import to Promox, I can not start VM. It said: "No boot device&...
- 1
0
votes
0
answers
61
views
Forward a single port to KVM Virtual Machine with Libvirt
I have a KVM that is currently running PBX software, and a OpenVPN server. I want to give a friend an IP Phone. I am connecting IP Phones to the OpenVPN Server so that they can communicate with the ...
0
votes
1
answer
150
views
TrueNAS Scale Installation on Proxmox Fails with "lsblk: CANT_FIND_vda3_OR_vdap3: not a block device" Error
I'm attempting to install TrueNAS Scale (24.04.0) in Proxmox (8.2.2), but the installation fails with the error message lsblk: CANT_FIND_vda3_OR_vdap3: not a block device.
Below is the table of the ...
- 347
1
vote
1
answer
80
views
resolv.conf being stupid about local kvm domain
I'm trying to get DNS resolution to work for KVM/libvirt on a Debian 12 host with NM controlling the resolv.conf.
My isolated KVM guest network is 10.10.10.0/24 and "hostname -d" of my ...
- 21
0
votes
1
answer
93
views
KVM Routed Bridge for Additional Subnet on Hetzner Using Netplan
I have a dedicated Ubuntu 22.04 server at Hetzner running KVM. I have assigned IP addresses from an additional subnet to guest VMs. I can reach the guest VMs via their public IP addresses as intended.
...
0
votes
0
answers
101
views
Arm cpu nested virtualization, How can I make VCPU start from EL2？
Recently I've been testing Arm architecture nested virtualization. Since I don't have actual Armv8.4 CPUs, I used QEMU-9.0.0-rc2 to simulate an Arm chip. According to the QEMU changelog, support for ...
- 1
0
votes
0
answers
105
views
How can I give multiple KVM bridges access to Docker containers?
I'm running Docker CE 25 on Ubuntu Linux 22.04. I have numerous KVM VMs routing ip through bridges br25 and br50. All of these components reside on the same host.
This issue has also been reproduced ...
- 31