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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1answer
25 views

How many cores can each VM have with free ESXi?

I am a bit confused about VMwares licensing with vSphere Hypervisor (the free one). I have a server with 2 X5650's which have 6 cores each and 12 threads. What would be the maximum number of cores I ...
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Administrator no longer has access to sconfig or the C drive

Been running Hyper-V 2019 Server fine for a couple of days with 2 VMs running on there. When connecting to the host server and log in as Admin it no longer launches SConfig but instead says Access ...
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1answer
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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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1answer
189 views

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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1answer
102 views

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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1answer
392 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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1answer
80 views

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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1answer
92 views

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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2answers
372 views

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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1answer
27 views

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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1answer
132 views

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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1answer
36 views

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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2answers
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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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1answer
68 views

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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1answer
38 views

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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1answer
2k views

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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1answer
294 views

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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2answers
2k views

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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3answers
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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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1answer
146 views

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 ...
2
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1answer
597 views

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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1answer
1k views

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 ...
2
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1answer
167 views

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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1answer
380 views

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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1answer
228 views

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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0answers
506 views

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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0answers
608 views

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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1answer
13k views

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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0answers
43 views

Why does my server suddenly restart?

I have a VMWare ESXI Hypervisor and its been working fine for the past 4-5 months but suddenly it's started randomly crashing after what seems to be under load. There are 2 VM's on this hypervisor ...
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0answers
398 views

Configuring xen hypervisor with multiple NIC

I want to configure xen with 2 NIC. The dom0 is configured with CentOS7 where the interface eth0 is facing the local LAN (10.12.X.X) and the eth1 (192.x.x.x) is connected to the corporate LAN. Dom0 ...
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2answers
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Why do I need an FQDN for a Hypervisor used only for running in house VMs for software testing?

I'm testing ProxMox, and during installation it asks for an FQDN. I've entered test.local, and it accepted it but I suppose I would have to enter something like cluster1.companyname.com, and then ...
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1answer
49k views

How do I remotely manage Hyper-V 2016 standalone via Windows 10?

How do I connect to my Hyper-V 2016 standalone via my Windows 10 laptop? Background: I'm setting this up as a home lab. I've followed a few guides, but I have not yet found a guide/Youtube tutorial ...
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2answers
49 views

Solutions to Classical Cluster Problems

This is a multi-step question, so bear with me. I am considering building a small (10 - 20 node) cluster. However, I want normal programs (not designed for clusters) to be able to take advantage of ...
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0answers
56 views

How do I install Xen without having a video system?

How can I install Xen on a system without having a video card nor onboard video? Something about pxeboot or kickstart? I've searched for the answer but keep ending up in docs that have very little ...
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1answer
292 views

Give Xen HVM DomU Control of Wifi Card

I'm running a Mikrotik Cloud Hosted Router as an HVM DomU under Xen. How do I give it full control of the wifi card instead of my Dom0? The DomU needs to be able to associate and disassociate with ...
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1answer
196 views

Should a KVM host be doing things other than hosting VMs? (such as ZFS)?

What are the performance and stability implications of running resource intensive services in a hypervisor vs guest OS? I want to set up a workstation with both Linux and Windows, hosted by (probably)...
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1answer
366 views

XenServer not detecting whole RAM (Dom0 and DomU 32-bit issue)

Well, somewhere I has read that my machine has a problem reading all the RAM because of the 32-bit limitation: http://xenserver.org/blog/entry/the-reality-of-a-64-bit-dom0.html I don't underestand ...
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1answer
257 views

Virtual machines and dual socket setups: minimizing need for CPU-to-CPU communication

I am planning to build a multi-OS workstation overseen by (probably) KVM, on which I will do a variety of tasks. Some of these tasks lend themselves to multithreading better than others, so I want to ...
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1answer
543 views

Which hypervisors use full/para virtualization? [closed]

So I kind of understand what the difference is between full virtualization and para virtualization. With full virtualization, the guest OS doesn't know that it is being virtualized. With para ...
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498 views

Nested Hypervisor Installation - Xenserver in Vmware

I need to do some testing with Citrix Xenserver 7.x (not any guest VMs within it - the hypervisor itself) and want to run it as a Vmware 5.5 guest. I have seen others who have successfully nested ...
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1answer
941 views

KVM latest version

So this might be a stupid question. But I'm comparing four different hypervisors (Hyper-V, KVM, RHV, vSphere) and one of the criteria is 'future development'. I was looking for the newest version of ...
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1answer
157 views

Determine which VIF interface belong to which Xen domain on SLES12.1

As mentioned I have a list of Xen Domain as below: Vm01<br>Vm02<br>Vm03<br>Vm04 And using bright network for communicating outside, After I launched 4 VM it automatically created 4 ...
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2answers
581 views

Troubles with booting xen VM in Hyper-V

I have raw image with xen hypervisor powered Virtual Machine (ubuntu 12) I converted it to vhdx (Hyper-V) format and now trying to boot it: Grub says error 13 invalid or unsupported executable ...
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1answer
385 views

Xen: Can't ping from domU to dom0

I have 2 local connected PCs. I'v created 2 VMs on PC1 and added connection through bridging using eth0 interface in dom0. From dom0: #brctl addbr xenbr0 #brctl addif xenbr0 eth0 #ifconfig xenbr0 ...
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2answers
422 views

Remote Desktop 2012 R2 performance lacks when multiple sessions are open

We have a performance issue on our Virtual Windows 2012 R2 server that is configured as a Remote Desktop Server. Also a customer of us, that uses our software, is facing the same problem on a 2012 R2 ...
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1answer
2k views

Very slow network with certain NIC Teaming modes?

I installed Windows Server 2012 R2 Standard to build a Hyper-V host. The server has a built-in network adapter (HP Ethernet 1Gb 2-port 332i Adapter) with the the latest drivers installed and left its ...
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1answer
70 views

Retrieve host info from a VM [closed]

I know we are able to know if we are in a virtual machine. But i'm wondering if we can gether informations about host from a vm (ip, mac, os, ...). Another question: if we do an http request from the ...
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0answers
535 views

Create Embedded Hypervisor from pendrive for IBM System X (x3850 M2)

I have an IBM x3850 M2 (7233). There is an USB port on the inside of it which - according to its manual - is for an embedded hypervisor. I plugged the an empty pendrive into the internal socket and ...
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1answer
38 views

Effects of Third Party tools on Hypervisor Performance

I am using XEN for managing and introspection of VM's. I used DRAKVUF for sake of introspection. XEN provide built in tools for managing VM's. But I want to use LibVIRT for management. I want to know ...