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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OPENWRT VIRTUAL MACHINE AS MAIN ROUTER [closed]

im new to networking and virtualization, i was wondering if we can use a virtual router openwrt as main router or default gateway. Like our data go from the physical router to virtual router than our ...
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Why do servers in a data center need to communicate with eachother and how does virtualization affect this? [closed]

A networking course that I follow briefly mentions the Spine-Leaf architecture used in data centers. It was mentioned that prior to the Spine-Leaf architecture design, the 3-tier design (access - ...
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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 ...
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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 ...
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Setting ep an AI server for multiple users

In the University I work, we want to buy a workstation with one or two powerful GPUs. We want students to be able to use the workstation remotely. This is the main restriction. It would be nice if ...
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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 ...
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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....
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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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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 ...
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QEMU 3.1 memory overflow (10gb) every 6 weeks while VM needs 0.5gb only. Debian. No logs

(See Title. Nothing special. Ends in unresponsive QEMU process / 100% cpu. Found no log events.) qemu-system-x86_64 \ -nographic \ -name $vmname,process=$vmname \ -cpu host \ -...
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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 ...
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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 ...
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VMs created in system (`QEMU/KVM` connection) fail to activate netwrok, in client session networking seems to work

Recently I've started to use Virt-QEMU-KVM stack. I'm creating VMs in GUI of virt-manager. After some time of making VMs I now notice VMs created in system session fail to establish network connection....
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Can a QEMU Snapshot taken in an Ubuntu machine be used in a Mac machine?

I am trying to understand if QEMU snapshots are cross-platform. I have two queries in particular around this, which I can't fully understand after reading through available info. Are snapshot cross-...
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Virtctl stuck at "The escape sequence is ^]" when trying to access VM created using KubeVirt

I have a Kubernetes cluster setup using KubeAdm (Setup in EC2 instances in AWS Cloud. Master node is a t2.large instance and worker node is an m5.metal instance). The CNI used is Flannel and the ...
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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 ...
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1 answer
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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 ...
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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 ...
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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, ...
-1 votes
2 answers
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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&...
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Selecting source IP address for NAT in VMware

Our ubuntu server has multiple public IP addresses. Let's say the Ips are 57.x.x.x and 147.x.x.x and 148.x.x.x We have 2 vms that are running web servers. How can we forward port 80 to both vms so if ...
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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 ...
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How to fix IP checksum between VirtualBox guest and docker bridge

I am not able to communicate between docker containers and VirtualBox guest due to IP checksum failure. On my host (Ubuntu 20.04) I have a Docker network with multiple containers (Ubuntu 18.04) ...
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Performance of compression of zvol or of contents?

So I have a "physical" pool containing zvols of volblocksize 64K (which was recommended by ZFS create). And on those zvols I have zpools/datasets with recordsize 1M (used as fileservers), ...
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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 ...
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How can I identify a virtual box physical disk from linux command line?

I'd like to know how to identify which /dev/sdX disk is the physical vdi disk of virtualbox. I've seen a UUID in Virtual Media Manager vdi disk information, is there any way to check it in Linux? I ...
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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 ...
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What is anonymous huge pages in node exporter?

Prometheus' node exporter has 2 metrics named as node_memory_AnonHugePages_bytes and node_memory_AnonPages_bytes. What do these measure? For a object detection flask app that ran across a bare metal ...
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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: ...
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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 ...
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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 ...
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Resource utilisation split in virtualisation platforms

I'm having a Hyper-V hypervisor and am running a CentOS 7 VM on top of it. The VM houses certain microbenchmarks (sysbench, stream, iozone and netperf) and I'm trying to study the effects (utilisation)...
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VMWare Sphere ESXi - ASUS Hyper M.2 x16 Gen 4 (PCIe 4.0 / 3.0) - Gammix. Device Offline

I installed ESXi 7.0 in my server. I'm using the ASUS Hyper M.2 x16 Gen 4 (PCIe 4.0 / 3.0) adapter to add 4, 2 TB Gammix S11 PRO SSD disks. I changed the bifurcation in the BIOS, and ESXi detect 4 ...
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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 ...
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1 answer
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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 ...
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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 ...
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Merging avhdx checkpoints into vhdx under Qemu/KVM

I recently switched over from Hyper-V to Qemu (KVM), and in migrating my VM’s unpleasantly discovered that I had neglected to use the Hyper-V tools to merge one of my Ubuntu VM’s disks containing ...
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Are there container orchestration platforms (e.g. k8s) that allows nodes to be containers, in production?

Existing popular platforms do not allow this: As per k8s docs: A node may be a virtual or physical machine The same is seen in k3s docs: A server node is defined as a machine (bare-metal or ...
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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....
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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 ...
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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 ...
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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 ...
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How to containerize a Linux native application in order to have multiple versions of it running at the same time from mostly the same codebase?

I have a Linux server application that is no longer supported by the vendor. I need to run 2-3 versions of this application at the same time in parallel. I can set up different VMs for it, and it ...
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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 ...
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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 ...
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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 ...
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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 ...
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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, ...
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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 ...
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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). ...

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