Questions tagged [virtualization]

Virtualization is a group of software technologies that allow abstraction between layers of a system. This allows separation between the logical layers of the system, providing isolation, flexibility, and/or the ability to run more than one at a time. This differs from most traditional systems where the various layers are inherently tied.

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Can't connect to MariaDB from internal VM Structure

S1 Virtual Machine 1: Ubuntu app server Virtual Machine 2: MariaDB 1 S2 Virtual Machine 3: Ubuntu app server Virtual Machine 4: MariaDB 2 from vm04 and 03 I can connect to DB1 with connection string ...
gegentierversuche's user avatar
1 vote
0 answers
95 views

Open/rescue large vmdk files with little ram and HDD memory

I have a vmdk file (approx. 800 GB), it contains many large media files. Unfortunately, the ESXI VM is filled to the last bit. The attempt of a subsequent enlargement was already some years ago, so ...
Huskynarr's user avatar
5 votes
1 answer
832 views

Linux immutable backup repository deployment architecture best practice?

What are the Linux distributions that are compatible with the Immutable repository? Can you give me some advice on the best hardware or virtual machine configurations to deploy a large backup ...
Senior Systems Engineer's user avatar
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98 views

Prevent vfio from loading for ethernet and wifi devices when using it for GPU

00:1f.4 SMBus [0c05]: Intel Corporation Comet Lake PCH-V SMBus Host Controller [8086:a3a3] DeviceName: Onboard - Other Subsystem: Micro-Star International Co., Ltd. [MSI] Comet Lake PCH-V ...
Mehdi's user avatar
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ZFS Not Recovering Space

I've certainly made a few rookie mistakes when setting up my first ZFS from a 4 drive array (14tb platters), mainly forgetting to change the block size from default. However I am missing space in my ...
jjonesdesign's user avatar
2 votes
1 answer
173 views

Is it possible to install and use Dokku on a server that already has Apache2 configured with VirtualHosts running?

Posted this on StackOverflow, but realized it probably belongs here: I have a Ubuntu (now upgrading it to 22.04) server that runs several virtual hosts with php applications. I'd like to run a couple ...
simonelippolis's user avatar
0 votes
3 answers
444 views

Openstack: Increase Hypervisor resources

Is there any way to increase resources of the hypervisor on OpenStack, e.g: VCPU, memory or Number of the volumes? I can use the following command to see them: openstack hypervisor stats show But I ...
WilliamK's user avatar
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0 answers
214 views

LVM Resize Failing

Summary I'm attempting to extend partition with LVM on it and its failing... All Googles and Bings have failed so unsure where the issue lies. Here is what's happened so far. This is a virtual server ...
unDrac's user avatar
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-3 votes
2 answers
136 views

Heterogeneous Cluster Solution for R&D

I work in a research laboratory with multiple physical machines with different specifications. The machines have different CPUs (some Intel, some AMD), different RAM sizes, some have discrete GPUs, ...
pinxau1000's user avatar
-1 votes
1 answer
68 views

Virtual IP in Single Server [closed]

I want to setup as below I have two ISP with different static IP, terminated in single server with two NIC, make virtual IP for this NIC, want to bind my local web serve to this Virtual IP, so that if ...
SDhimar's user avatar
-2 votes
1 answer
129 views

Does vSphere ESXI Virtualization needs to be installed on root server or is it an application which can be installed inside an OS? [closed]

Recently I've bought Dell PowerEdge R620 Server. I am interested in running Windows Server 2022 as well as I am interested in running virtual machines using Virtualization. Now I know that Windows ...
accelarys's user avatar
1 vote
2 answers
4k views

Is GPU-P (GPU-Paravirtualization) Safe?

i'm working on building a virtualization server and i want to partition the GPU like the LTT team did in this video and how craft did in this video. i want to this in the production environment for a ...
jwsl224's user avatar
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1 answer
314 views

Is it (still) possible to overcommit cpu with Xen?

Common hypervisors (Proxmox, Vmware, KVM..) do not prevent the sum of allocated virtual resources (such as vCPU) to exceed the number of physical ones, even if some of them (OpenStack) do limit the ...
PierreJ's user avatar
-1 votes
1 answer
338 views

VMWare Workstation configure network adaptor to be 'Intel Networking'

I am trying to create a Windows VM with VMWare Workstation that has requirement to "Use an Intel networking adaptor and not 'Virtio'" I am putting this in quote as this is one of the ...
Djoby's user avatar
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0 answers
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Destination Net Unreachable on an ubuntu VMWare cloud virtual machine

I am configuring a virtual machine to host an API for an application. I entered the vCloud director page and followed these steps: Generated the edges network Created a VDC organization network (192....
Dimitar Veljanovski's user avatar
2 votes
2 answers
906 views

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 ...
Max's user avatar
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-5 votes
2 answers
1k views

Encryption at rest for VM storage in a hypervisor done properly/elegantly

Given a very simple infrastructure - a single machine running a hypervisor(Proxmox if it matters), I want to achieve a good data protection against the hardware being stolen. Let's say there are ...
alex.b.bg's user avatar
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1 answer
358 views

VM - Create vCPU with multiple threads

I'm looking for a virtualization solution that allows to create vCPUs that have multiple threads e.g (1 Processor / 4 Threads). It's all about running an older software that is licensed to CPU cores ...
viralmantis's user avatar
1 vote
1 answer
103 views

Spinning up vm/containers for single windows app

I admin a small Edu/MakerSpace, and we have a few donated pieces of equipment that require a Windows-based OS to run the controlling app. I have tried looking for & tested a Linux/POSIX-based ...
kieppie's user avatar
  • 11
-1 votes
1 answer
350 views

What are the usecases and benefits of using KubeVirt

I am trying to explore a bit about KubeVirt (https://kubevirt.io/) which is an open-source sandbox project of CNCF. KubeVirt help in provisioning virtual machines inside a Kubernetes cluster along ...
arjunbnair's user avatar
0 votes
2 answers
534 views

how to convert .tib fille to .vhd/.vmdk

I#ve been looking for ways to convert a .tib file to a .vmdk file, however all solutions i was able to find on the topic rely on old discontinued software that i can no longer find online (for example ...
AalHai's user avatar
  • 21
1 vote
1 answer
336 views

Limit number of CPU cores in bare metal server

I was trying to benchmark application performance across bare metal and hypervisors. I have a 24-core server on which hyper-v is running. On the same machine, I have centos7 installed. I can set the ...
helloworld's user avatar
0 votes
1 answer
5k views

How is it possible for a host-only VM to have internet through a host only network adapter?

For a program I'm installing on the host machine, which requires results from a VM, I need to set my VM (https://utopianknight.com/malware/cuckoo-installation-on-ubuntu-20/) as host-only. Normally, ...
jefazo92's user avatar
1 vote
2 answers
4k views

How to assign full processor(cores/sockets) to a VM? VMware

Trying to use VMware. Using Ryzen 9 5950X(16 cores / 32 threads). The question is how to assign all cores/threads properly to a VM? Were trying different configurations of "Number of Processors&...
Viktor's user avatar
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1 vote
0 answers
564 views

KVM start failed (ubuntu image)

KVM start failing after I have made the below changes. Environment:- qemu-img version 2.1.3 ubuntu VM 1. Stop the VM 2. qemu-img resize vm1.img +50G 3. start the VM virsh start vm1 error: failed to ...
Ekam's user avatar
  • 11
0 votes
0 answers
77 views

vmdk image without /dev/root

I have vmdk server image without /dev/root, I want to deploy it with DigitalOcean (they support custom images). I created images, started droplet, but unable to connect via ssh. I entered ...
Q-bart's user avatar
  • 101
0 votes
1 answer
289 views

Installing virtio drivers on windows server 2016

I am trying to install virtio drivers on a VPS I bought and i installed a windows server on via an unintended method. But I am stuck... I don't have an internet connection to the server. So I cant ...
jojo osinga's user avatar
0 votes
1 answer
711 views

KVM bridge only assiging ipv6 adresses on VM

I use KVM in bridged network mode so I can have a VM that has an IP from the host LAN network. My host (Ubuntu 18.04 server) networking is configured as below : network: ethernets: enp0s31f6: ...
toing_toing's user avatar
0 votes
1 answer
117 views

Zabbix Server configuration Inquiry

I hope I’m posting in the right place. So, I have a question. I’m trying to set up a simple network monitor (Zabbix) in VirtualBox to monitor the hosting machine. I have everything set up, but the ...
Cam's user avatar
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1 vote
1 answer
263 views

Why SSH still works after applying SNAT and DNAT rules to forward ip (on the SSH server)?

I have the following situation: I have a Ubuntu Server VM with a bridged network adapter (let's say its ip is 192.168.100.3) that exposes an ssh server on port 22, the VM is hosted on a Ubuntu ...
johny.bravo's user avatar
1 vote
1 answer
26 views

Co-locate VM on a single/set of core(s)

I'm trying to understand certain impacts of virtualisation on performance by running benchmarks on VMs. I'm considering ESXi and Hyper-V as the hypervisors. I wanted to know if I can pin a VM to a ...
helloworld's user avatar
0 votes
1 answer
506 views

python virtual environment on rolling distro (Arch)

I am a big fan of the rolling distribution model. I do need help with one hiccup. when I create a virtual environment in python to isolate a project all works great until my rolling distro upgrades ...
posop's user avatar
  • 247
0 votes
1 answer
2k views

Proxmox VE - problems in setting private network

I have recently bought a test dedicated server from to test proxmox. The installation went smoothly; however, I get stuck in the network configurations. My Use case- I want to create 8 LXC containers ...
Animesh Singh's user avatar
0 votes
1 answer
355 views

Can i run Ubuntu WSL2 on a VPS which runs Windows Server 2022 Datacenter

I want to use a 8GB RAM, 4 VCore VPS Server which my hoster Contabo offers with Windows Server 2022 Datacenter image. This is for a build server that should generate executables for Windows and Linux....
Lothar's user avatar
  • 811
0 votes
1 answer
2k views

http error 403 for vsphere login page

I am running a vcenter server, and created a desktop shortcut for the vsphere webclient login, it works well, but after a certain time, around 2 weeks the desktop shortcut will no longer work, and ...
AalHai's user avatar
  • 21
0 votes
1 answer
2k views

Assigning a Public IPv4 automatically to every KVM VM thats being created?

Im wondering how would i go on about assigning a public ipv4 to each vm thats being created. Setup : Host Server with 3 IPs on CentOS8 using libvirt and kvm to virtualize Bridge br0 using eth0 as ...
Keith's user avatar
  • 3
-1 votes
1 answer
150 views

Folder/source code sharing options between linux guest and Windows host [closed]

Host is Windows 10, guest is Ubuntu server, running under Virtual Box. Desired feature is to be able to share a folder containing source code between these too. Basically I want to be able to edit the ...
onetrickpony's user avatar
1 vote
0 answers
431 views

Configuring different apps in Nginx using same domain

I have an ecommerce application running 2 applications. App 1 (example1.com) is written as react.js and built as a normal html site. Nginx is serving this on port 7000. App 2 (my.example1.com) is a ...
Bobj's user avatar
  • 11
0 votes
1 answer
511 views

virbr0-nic unmanaged in KVM/Cockpit

I am running cockpit on Rocky linux to make a KVM host. I have installed and enabled all 4 nics onboard and they are showing up as managed in the management tab except virbr0-nic when I run the create ...
Kyle Sponable's user avatar
0 votes
1 answer
2k views

Checking if NIC controller has SR-iov capability

I'm trying to use SR-IOV with openstack, and in order to check if the NIC available on my servers support this technolony I did the following: (venv) [root@controller share]# lshw -c network -businfo ...
Rafik's user avatar
  • 35
1 vote
3 answers
1k views

Alternatives to vMotion for moving virtual machines to a different Datastore

The company i work for is running a small virtual environment and has several virtual servers on 2 different ESXi hosts managed by a vCenter, for reasons relating to backup verification i need to make ...
AalHai's user avatar
  • 21
1 vote
0 answers
5k views

minikube not running with virtualbox, how to fix that?

I am using windows 10 professional edition. Installed virtualbox and also enable virtualization on bios, that's why able to run windows 10 64bit machines as VMs in virtualbox. When I started minikube, ...
user2331760's user avatar
1 vote
0 answers
313 views

Is there a way to automatically install vmware tools on new Windows server VMs upon VM Creation in vCenter7?

We are running vCenter7 to manage our virtual machine infrastructure, i am trying to set up backup verification with nakivos screenshot verification feature, however when the flash VM boot job ...
AalHai's user avatar
  • 21
2 votes
0 answers
949 views

qemu-kvm snapshot creations are extremely slow after a few first fast ones

Could anyone help me on this please? behavior I'm running several VMs with qemu-kvm and when creating some first few snapshots of a running VM, they are created super fast (roughly 10 seconds). ...
steffres's user avatar
  • 101
1 vote
1 answer
139 views

VirtualBox on linux: hangs on __lock_acquire on Fedora Core 35

VirtualBox (VirtualBox-6.1.x86_64) has for sometime been useless on my workstation (Linux FC35,kernel is 5.16.12-200.fc35.x86_64+debug: but the issue existed previously on FC33). The GUI starts, but ...
Alien Life Form's user avatar
0 votes
0 answers
161 views

Check computers on network for core isolation

Trying to find best method for checking all domain computers for core isolation being enabled. We have been slowly enabling this as new machines are deployed, but I would like to expedite the ...
TurboAAA's user avatar
0 votes
1 answer
5k views

QEMU - (Index=0) exists

I'm getting this index=0 exists error when I try to run qemu with this specific lines: Command: qemu-system-x86_64 ` -cpu "Penryn-v1" ` -boot order=c,once=d ` -m 4096 ` -smp 2,sockets=2,...
Gabriel Jefferson's user avatar
1 vote
0 answers
415 views

Why do I see many "kernel: vif ...: Guest Rx stalled" / "Guest Rx ready" messages?

Since upgrading a Xen host that also is a node in a pacemaker cluster from SLES15 SP2 to SLES15 SP3, I see these messages roughly every 30 seconds, and I wonder: What are these messages telling me? ...
U. Windl's user avatar
  • 389
0 votes
1 answer
37 views

Infrastructure Modernization [closed]

About 7 years ago, I put in a W2012 Server Infrastructure (Now W2016) for a small (<$5MM) 3PL company. They have (2) locations with most users on prem. The owner had a small budget and I didn't ...
RW IT Director's user avatar
0 votes
1 answer
1k views

Does configuring BIOS really solve ESXi CPU Contention?

There's alert coming up on our server saying CPU Contention even if we already isolate that VMguest from another high CPU consuming VMguest: Alert Definition Name: Virtual Machine on a host with BIOS ...
VR-4's user avatar
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