Questions tagged [hypervisor]

This is one of many hardware virtualization techniques that allows multiple "guest" operating systems to run concurrently on a "host" computer. Also known as virtual machine manager (VMM).

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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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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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Installation of hypervisor on Linux server

Do you know if it's possible to install VirtualBox or VMware Sphere hypervisor on the Oracle Linux Server 7.9?
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Can we assign the multiple cores of different hypervisors in same cluster?

I have configured the Three hypervisors with the OnApp. As all the Hypervisors use the SAN storage, if any hypervisor gets down, VPS hosted on the one hypervisors boots on two hypervisors. Each ...
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How to use hosts with no storage disks and virtual machine instances with no local drive in Openstack

In Openstack, is it possible to create compute nodes with no hard drives and use PXE in order to boot the host's system and therefore launch instances with no local drive which is needed to boot the ...
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Why virtualization still used instead of containers? [closed]

In 2021 era of containers, cloud providers still use hypervisor to make it possible to use more of a system's available resources and provide greater IT mobility since the guest VMs are independent of ...
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Firecracker vs ACRN?

What is the main difference between the ACRN and the firecracker hypervisors ? As I understand, ACRN The ACRN Hypervisor is a Type 1 reference hypervisor stack, running directly on the bare-metal ...
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How to deal with AD when deploy Hyper-V cluster?

I try to plan Hyper-V cluster deployment over several host servers (10 or maybe 12; hosts are rented) placed in two separate datacenters. This will be Hyper-V Server 2019 Core hosts. The problem is, I ...
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Is it secure to still using an old version of VMWare ESXi for production after support ends?

I'm on a small sized business in which they own a HP ProLiant DL380 G7 Server for production. We would like to use a free license version of ESXi which is the version 6.7 U3 because we can't run ...
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Rudder-Server can't receive pending nodes : There is no readable input file at '/var/rudder/cfengine-community/inputs/failsafe.cf'

I've installed Rudder-server on a debian buster container, the software works fine : every services rudder-* have active status without error and I can access the web interface. The debug rudder ...
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Best Practice: Add an Additional Disk to Expand Logical Volume or Expand Existing Disk

We host a client’s Oracle VMs on our Nutanix platform. To date, whenever their VMs require more space they have us add an additional vDisk which they then add to the VG in order to expand the required ...
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Can I setup KVM Hypervisor on Soft Raid?

I'm running several virtual private servers as well as quite a few dedicated machines. I'm wanting to cut costs by setting up a dedicated server to run enough virtual servers to meet my requirements. ...
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KVM hypervisor - Windows 32bit VM, RAM up to 2GB usable

I've got a Debian 10 KVM hypervisor, no libvirt or other tool to administrate it, using QEMU scripts. I need a 32bit Windows VM for a legacy app, but on a supported OS (not XP), either Windows 8.1 or ...
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Hyper-V Cluster 2019 suggestion for requirements [closed]

We are planning to purchase nodes for the Hyper-V Cluster which will run on Windows Server 2019. Which chipset you recommend for cluster 2019? What is your recommendation for PCIe Cards? Should all ...
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How do I interact with the virtual machine from Hyper-V host?

I'm running a hypervisor Hyper-V on server hardware. I exported two virtual machines from elsewhere and I want to start them here while disconnected from the LAN. I'm on a terminal session on the ...
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How is live migration of a VM possible/made?

From this article: Virtualization: What is KVM? and other resources, I learned that it is possible to migrate a Live VM from one host to another? Live migration KVM supports live migration, which is ...
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KVM/QEMU - best practice for creating snapshots of your guests regarding disk space on the hypervisor

I have several KVM/QEMU guests with each having one hard disk based on the qcow2 format. As I understand, I have two option for creating snapshots. First is to create a snapshot inside the qcow2 image:...
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Dedicated IPv4 address for a KVM guest

I have a dedicated bare metal server, which is a KVM host and which has it's own IPv4 address. I just ordered another seperate IPv4 address for a KVM guest and which should be used for the KVM guest ...
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Is pausing/suspending VM into memory for long periods (months) recommended?

I am running KVM with some Ubuntu VM's as guest machines. The guest machines contain an application that does not need to be run most of the time, but once every few months, there are unexpected, ...
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Powershell: unable to create new Hyper-v VM remotely

To simplify our current setup. We have SRV01, SRV02, and SRV03. All Windows Server 2016 with Hyper-V installed and joined to our domain. SRV01 host a shared folder "\\SRV01\VM-ONLINE-STORAGE\Test&...
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Centos 8.2 KVM Windows Server 2019 Blue Screen

EDIT 11.07.2020 I prepared a custom vhd via virtualbox. It has the same bluescreen, but now I'm getting into cmd. mdsched worked fine -> So no memory issue... Informations: HP Proliant 380 G9 ...
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How would you (incrementally) backup KVM VMs based on LVM storage?

I'm running a set of KVM hypervisors on LVM storage (unfortunately I can't use QCOW2, because the virtualization platform I'm using is strictly LVM-based). The virtualization platform has a very poor ...
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2 votes
1 answer
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How many cores can each VM have with free ESXi?

I am a bit confused about VMware's licensing with vSphere Hypervisor (the free one). I have a server with 2 X5650 Intel processors which have 6 cores each and 12 threads. What would be the maximum ...
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KVM VM which MAC address to give hosting company (Fasthosts)

To allow traffic to be routed through there network for my KVM VM my hosting company want to know the MAC address. The way I have it set up is my VM used a different IP from the host. I have bridges ...
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Installing an Operating System onto Microsoft Hyper-V Server 2019

I have downloaded and installed Microsoft Hyper-V Server 2019 on a laptop, I am using Hyper-V Manager in another laptop and have created a virtual machine in the Hyper-V Server. Now, how to provide ...
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2 votes
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KVM - Import CentOS 7 from XenServer

I imported a virtual machine (CentOS) from XenServer to KVM. This virtual machine originally had two disks (LVM). I added both disks to the imported machine in KVM. The disk containing the boot ...
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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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Is PCIe passthrough on Citrix Xen Hypervisor persistent?

I am virtualising my firewall, NAS and other services to reduce hardware diversity. Specifically I want to run at least PfSense and OpenMediaVault over Citrix Hypervisor (v8 at the time of writing). ...
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Fresh ESXi 6.7u2 install not accessible on management IP

After building the server, I connected my laptop to Ethernet port marked as 1 and attempted to ping the IP. This failed. I tried the other 3 ports, same result. Server has 4 NICS so I connected ...
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How to set 6 physical, 6 hyper threading total 12 cores to hyper-v virtual machine - A parameter cannot be found HwThreadCountPerCore

I have windows server 2012 R2 on physical dedicated server I have created a virtual machine via Hyper-V and installed Windows server 2019 in it My dedicated physical server has 12+12 total 24 ...
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2 answers
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Installing KVM on Oracle Solaris

As searched shown KVM is not bare-metal and can be installed on some Linux distros, I wonder is it possible to install KVM hypervisor on Solaris?
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Cannot increase disk space of a esxi VM

I wanted to increase the disk space of a VM in my VMware server esxi. I deleted a snapshot that was in the VM, but I canceled this operation unintentionally. Now, I can't see the snapshot in ...
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2 votes
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Simple Hypervisor for one OS from boot [closed]

I would like to run a hypervisor that will let me install a VM on it where the end result would be such as that when these workstations will be turned on the following will happen: Hypervisor boots ...
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What parameters of guest OS can be controlled with hypervisor? [closed]

I know that some hypervisors allow you to control the amount of available RAM and disk size of guest OS. What another parameters of guest OS can be controlled with hypervisor? (I'm asking about type ...
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Identical Processor - Live Migration Error

I have production problem thats why Im asking for fast help :/ Environment 2 new HyperV Host with Windows 2016 in Failover Cluster Both with CPU: Intel® Xeon® Silver 4116 Processor 2.10 Ghz Live ...
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Windows 2012 Hypervisor shuts down VM but cannot start it again

The last few days, one of the virtual machines, a VM running Centos 7 is shut down late in the evening and then not restarted. When I try and start it manually I get the error 'CENTOS7' failed to ...
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In Public IaaS cloud, if my VM is given any available pCPU core, how sure am I that I get all the cores I pay for?

I am a new comer to virtualization! At least from what I know, in virtualization if I have a VM, the scheduler will give it any core available for processing in the physical CPU (pCPU) and it is also ...
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how to install license to Xen server 7.6

Is it possible to activate Xen server using the trial license(90days)? I have installed xen license server using Citrix License Server Virtual Appliance. And uploaded my trial license file to local ...
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What is hypervisor? examples for type1 and type2 [closed]

What is hypervisor, and what are the differences between type1 and type2? Examples for type1 and type2 ? Most questions out there are about the difference between type1 and type2, and the definitions ...
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2 votes
2 answers
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Hypervisor type of Hyper-V on Windows 10 vs Hyper-V on Windows Server

Hyper-V on Windows 10 differs from Hyper-V on Windows Server in features and memory management, as stated in Microsoft docs for Hyper-V: There are some features that work differently in Hyper-V on ...
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3 answers
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Vmware ESXI 6.5: Is there a way to combine all 16 vcpus to form 4 vcpus which performs better [closed]

I am not talking of overprovisioning of VCPUs. It's actually reverse. A way to combine all available threads to virtualize into a limited number of vcpus to get advantage of ESXI limitations. I have ...
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How to compare and rate Virtual CPUs?

I have got two virtual Servers on different Hosters and asking myself how I can get a clue of the CPU Performance. Which metrics can I have a look at and how can I get a feeling for it so that I can ...
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2 votes
1 answer
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VMware ESXi boots to black screen with only one text line: "usb"

After rebooting my server (Lenovo System X), my ESXi instance starts to boot and then hangs up after the Yellow/Grey screen. I have a black screen, with a white "usb" on top. I found similar issue ...
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ESXi 6.5 Pink Screen of Death [closed]

I have a server that seems to be cursed. Every 2-5 days it fails (I'm still pretty new to this stuff) I've spent the last couple weeks or so trying to find solutions. But I'm clearly not getting ...
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Installing Hyper-V Role on Server 2012 R2 Without the Hypervisor

I have a Windows 2012 R2 Essentials Server running on top of Hyper-V Server 2012 R2. In server manager on the Essentials Server, I'd like to be able to manage other Hyper-V servers remotely. I'm ...
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Manager Hyper-V Server 2016 (core) with Windows 7 Pro + HyperV MNG

I would like to know if it is possible to use Hyper-V Manager on Windows 7 Pro to manage Hyper-V 2016 server (core)? I installed Hyper-V Manager, made some configurations on the Windows 7 Pro, to ...
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How does file system selection at hyperviser affect KVM VMs?

I'm new to hypervisors and will be setting up a single host machine with a hyperviser that supports multiple filesystem types (LVM, ZFS, NFS, Glustfs etcetera) - this hypervisor will then run a small ...
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1 vote
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Raid 6 or Raid 10 or Both + Hypervisor / VM's + Storage Config

I guess this is a multiple answer question, but looking on the web didn't find this kind of mind set. I have a server (HP ProLiant DL380 Gen9) with 6 x 1,2 Tb SAS 10k (have 2 spares disks), and a ...
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1 vote
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Nested hypervisor CentOS 7.3 guest install hang black screen

Trying to install CentOS 7.3 VM in a nested hypervisor situation. I have a need to work with a CentOS 7.3 VM guest working within a Windows 2016 Hyper-V environment, that is a second generation VM ...
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6 votes
2 answers
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Resize partition to maximum using parted in non-interactive mode

Since using fdisk in this case is fairly complicated due to the fact that the non-interactive usage is probably not possible or at leasr very complicated (using printf), i want to use parted ...
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