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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8 views

Are oversubscription and overcommitment the same?

I see the terms being used together in the context of QoS and compute resource usage in the cloud, but I am lacking a formal definition of the terms and how they relate. For example, this ...
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postfix on the cloud without mydomain

I'm trying to make postfix server on a cluster (docker swarm). The postfix main.cf configuration needs mydomain but I'm not using a dedicated machine to domain name. I have 10 machines and 6 domains. ...
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VirtualBox VM's display refresh rate >60Hz [closed]

When I run a Kubuntu guest on Windows host in VirtualBox - I only get 60Hz refresh rate on a virtual display. UI feels very slow and laggy compared to native 120/144Hz UI. How can I achieve 120/144Hz ...
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Python: Performance impact of virtualization

I know this question has been asked somewhat similarly before but my question is more specific and the existing ones are old. So things might have changed a lot (thinking about vector instructions for ...
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58 views

Virsh command not working to install Centos 8 virtual-machine on Ubuntu 18.04 via qemu/kvm [closed]

I am trying to install centos 8 on ubuntu 18.04 as a virtual machine. I have a wireless connection. When I run the following command: chh2@chh2-cpu:~$ sudo virt-install --name=chris_centos --ram=...
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167 views

What is parallel virtualization?

I'm trying to understand what types of virtualization exists and to assist this task, I found a book by Dijiang Huang and Huijun Wu, Mobile Cloud Computing. The passages posted below are also ...
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How to run multiple copies of a program? [closed]

I need to run a scientific program. One can usually only run one copy of it at any one time, it wont allow another copy to be open at the same time (somehow). I would like to set up virtual servers ...
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Virtualized web server structure

I am on the process to virtulize (proxmox) my physical server and I successfully created several environments like lunix VMs, LXC containers and other Windows VM too. Most VMs and Containers are web ...
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Move Legacy system into virtualization

I currently have five windows hosts which all have graphics output. I would like to virtualise this setup as it is running on really old hardware and is using little resources by todays standards. ...
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Network setup for VPSs via Virtualizor

I want to generate VPS via Virtualizor. I have block of public IPs, dedicated server and switch. Switch has internet plugged-in directly from ISP - no router on my side. Server with Virtualizor is ...
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Is there any reason to keep firewalld running on a virtual machine with host firewall?

I'm setting up a CentOS 8 virtual machine created under Proxmox. Even when I choose the minimal install, I'm getting firewalld installed and enabled by default. If I activate Proxmox's built-in ...
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Compatible AMD GPU for the Dell PowerEdge r710 [closed]

I'm a complete noob when it comes to server virtualization and GPUs, so please bear with me. Are there any decent AMD GPUs that are easily compatible with the Dell PowerEdge r710? I'm looking for ...
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Auto login to windows Virtual Machine [closed]

We have a VM on GCP with windows server. The machine gets shutdown over night and then starts up again in the morning everyday using Cloud scheduler. Auto log in in was setup in Windows registry. ...
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AWS AMI import of HyperV Virtual Machine on LVM extended partition on Two drives

I am having a problem today while importing a hyper-V vm to AWS AMI. Actually my VM has 2 Harddisk and both of them LVM set and use as single LVG expended volume on both drives. now when i am ...
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Poxmox Add new public IP

I try to use Poxmox with a public IP but now I want to add another public IP to the panel. In the Panel it does not let me put it directly and I must do it by interfaces /etc/network/interfaces ...
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How to repaire a vmdk that is “is corrupted and cannot be repaired.”

I was running a virtual machine in VMware Fusion 11 when my computer crashed. When I tried to start it up again I saw an error message informing me that "The disk has one or more internal errors that ...
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Qemu kvm virsh xml config for emulating PPC (PowerPC) guest VM on debian x86_64 host

When I try to save with virsh edit a qemu config with domain qemu (KVM not supported on x86_64 host when running PPC guest) and machine either g3beige or 40p (any other I can try?) with emulator qemu-...
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32 views

Using MacOS as a VM and a legal copy

I'm interested on trying out using MacOs in Windows. My main machine is Windows 10. I can use either VMware or VirtualBox in the windows machine but I cannot get any source to get the Disc img for ...
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33 views

How to load vms from a forgotten drive without having to import

This is an awkward problem. I keep my Hyper-V Virtual Machines in 2 different external hard drives that are different volumes on my host PC. One of the drives could not be recognized for whatever ...
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Windows Server 2019 VM clustering shared storage [closed]

Spec: Windows 10 host, 2 Windows Server 2019 VMS's in a cluster setup. The cluster is setup and fully functional except for the storage. However; I am unable to understand if this scenario is ...
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1answer
68 views

Nested Hyper-V not working error 41 - Hypervisor launch failed; Either VMX not present or not enabled in BIOS

I would like to run hyper-v on a hyper-v server which in theory is possible. But when I try to start a VM in the child hyper-v I get an error. I checked the Event log and there it is, code 41. ...
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123 views

Alternately running VMs with VMware on Windows and KVM in Linux

I plan to set up a virtualized test- and demo environment to show our clients how wonderful some applications can be deployed as containers. To be mobile I plan to use my laptop as the hardware ...
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Is buddyinfo valid in virtual machines

Buddyinfo shows number of contiguous pages for each order available. Since virtual machine treats host's virtual memory as its physical memory does any kernel module allocating higher order memory ...
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Hyper-V 2019 Converged Network

I think I have confused myself here, I have 2 nodes with windows server 2019. I plan on creating a converged network using 5 10gb NICs. I will create a NIC Team called 'Converged-vSW', the 5 NICs ...
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Virtualize a windows boot partition over smb

I would like to know, if it is possible, to virtualize a windows boot partition from a Linux machine, over smb? I have only access, via the Admin Share C$, from my linux box through samba. I dont ...
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How can I stop Freenas from assigning two disks from different SATA controllers the same device number?

I have Freenas running in a VM in XCP-NG. I've followed the guides and I've dedicated a SATA controller to it using PCI-passthrough. Freenas correctly discovers its boot disk, which is virtual, and ...
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Virtualisation primary GPU

The Server is running on Proxmox VE. My goal is to use any GPU in a VM. So I blacklisted nvidia noveau radeon amdgpu to ensure all GPUs are correctly accessible to assign the VFIO driver. I've added ...
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481 views

Proxmox VM Very Slow Performance

I'm new in proxmox, I just installing proxmox on my pc core i5/3.5ghz/15gb/500gb sata And I installing windows 7 with 4gb vram and 4 core proc. But when I trying to console it the response is very ...
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Connect from Windows host to QEMU inside Docker

I am trying to establish a connection between Windows 10 running Docker container (Linux), which runs QEMU to host a QNX OS. This picture should make it more clear: Structure I would like to ...
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Is it possible to create a VM from the disk(s) of a failed physical machine?

I have an old machine which has failed, looks to be a motherboard fault, but as far as I know the disks, a pair of 120 gig SATA drives using software RAID, are OK. So the machine can't be booted but ...
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Filter/Analyze virtual machine traffic on another physical machine

Consider a host machine running multiple virtual machines. Hypervisor is most likely KVM with libvirt. The host machine should be connected to some firewall or switch for filtering/analyzing traffic. ...
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armhf VM on amd64 with virt-install

I'm trying to install a VM with armhf on an amd64 system with: virt-install -n test2 -r 2048 --os-type=linux --disk ~/armhf.img,device=disk,bus=virtio,size=8,sparse=true,format=raw --os-variant ...
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35 views

Separate LAN/DHCP network for each VM under same Physical NIC

I have a bare metal server with 2 NIC(eth0 and eth1). eth0 is connected to the internet and eth1 for LAN(DHCP must). Now I need multiple servers like that. So I have decided to go for VM. I have ...
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Does Windows Server or Linux Server support creating shared memory using the Clients' RAM? (DSM) [closed]

Does Windows Server, any version, Hyper-V or otherwise, or Linux Server, open or commercial, support creating virtual shared memory using portions of the RAM present on each (or some) of the client ...
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Virtnetwork and Netplan

I setup the bridge with netplan on ubuntu 18.04, everythin look ok: br0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet myip netmask 255.255.255.192 broadcast someip ...
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167 views

Do servers do their own load balancing? (The cores. Single server system.)

When I look up load balancing, everything I see is talking about distributing traffic to multiple servers. I did a Google search for "single server" and "one server" in this context, and don't see ...
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QEMU and SPICE on Win 10 host

I am trying to run a Linux kernel based VM image (1) using QEMU on Windows 10 host. I have installed QEMU from https://qemu.weilnetz.de/w64/qemu-w64-setup-20190815.exe and SPICE client from https://...
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172 views

Using SR-IOV I350 embedded switch for KVM virtual network — is an external switch required?

I'm connecting several KVM VMs to a virtual network that is routed to a 1Gbit physical network. The router uses netfilter/iptables to filter traffic between the real and virtual networks. For the ...
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1answer
791 views

ZFS inside a virtual machine

Should I use ZFS inside a virtual machine? According to existing information (in particular this thread, which I will quote below) it is not a good idea, unless certain measures are provided (such as ...
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51 views

How to realize vma backup with proxmox from command line?

I have a problem with my proxmox node, I have to reconfigure the server disks, since having them badly configured, I cannot perform snapshots quickly since they are badly mounted and the io is very ...
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1answer
77 views

Virsh can't detect my new vm

I have a *.qcow2 image from my old OS, it contains Windows 10. Then I copied it to the new OS and tried to install it. I followed the method written here "How to create a new domain from an existing ...
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How do I increase the video memory of a VM running on vCloud Director?

I am running vCloud Director version: 9.8.0.14346364 and I am an org admin. For a particular tenant VM, how do I configure the video memory settings? I have access to the HTML5 client as well as Flex ...
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168 views

ZFS volume is not accessible

I'm using FreeNAS-11.2-U4.1. The server is used for storing VMWare vSphere virtual machines. There are two zvols: Lab and Edari. Both of them belong to the same pool, SSD-Storage. The problem is that ...
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164 views

Virtualbox performance on NUMA host (AMD Epyc)

At a small software development house, we virtualize our build servers (using VirtualBox) so that they can be easily backed up, snapshotted and the like. We've recently bought a new server using an ...
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697 views

VMkernel NIC what is it?

I just started playing around with vSphere hypervisor (free version), and so it wasn't something i would call complicated but then Vmkernel NIC appeared. What is it used for ? Why management network ...
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creating or importing custom images with cloudmin

I have used cloudmin for creating VPS. Does anyone have any experience importing customer images into cloudmin? I have tried importing arch, yunohost and other images and have never got it working. ...
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572 views

Virtual Networking in KVM breaking internet access

I have set up a virtual networking on my CentOS 7 Workstation and the primary physical network interface is bridged as per this RHEL article. libvirtd is running successfully, however after reboot ...
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41 views

can't ping/ssh/http(s) request to another vm(kvm)

0 I have problem with KVM in Debian, I build two VM machines (windows and Debian VM). I want this VM machines to be accessible by each other I googled it and I know I need to build a bridge and I did ...
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1answer
291 views

Virtual Machine consuming Double CPU Resource in Host OS

I am using Hyper-V in Host OS Windows 10 Pro and virtual os is Windows Server 2012. I am using only One VM at a time to check the CPU Utilization of VPS with respect to HOST OS. Note : VM have same ...
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1answer
167 views

GCP App Engine Flexible Environment Slow Disk I/O

Background/Overview: We have a Python Web Application with three environments in two projects staging/dev and production. These are hosted in GCP using Google App Engine Flexible Environment, Cloud ...