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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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Poor man's virtual GPU, using a multiuser OS + GPU, instead of specialist vGPU card?

I've read about this system in a white paper somewhere, but can't remember where, or any details, and haven't found it since. The comment was in regard to GPU virtualisation with Type 1 (bare metal) ...
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7 views

Hyper-V mount permission issue

So, I have set up Ubuntu18.04 server with Hyper-V and I want to use it for development. I installed apache, all was looking good, I mounted my project from Windows(using SMB and mount -t cifs), but, ...
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24 views

Assign External/Public IPs to VMs in OpenNebula (Open vSwitch)

I've read multiple posts asking the same question, on KVM and open nebula forums and in general virtualization ones but have only found partial or bogus answers. Some Info: Objective: Be able to ...
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1answer
27 views

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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33 views

How do you make use of VT-d features other than PCI passthrough?

I did some research and from what I can tell the main feature that VT-d provides is PCI passthrough. https://en.wikipedia.org/wiki/X86_virtualization#Graphics_Virtualization_Technology_(Intel_GVT-d,...
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40 views

Running a Router Computer Software (i.e. pfSense) on a VM in the Server to Monitor Traffic

It's kind of hard to explain what the title means. I'll explain it. So basically, I have a Server (Dell T710) on our Computer Laboratory in the school, which is running Windows Server 2012. It has 4 ...
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19 views

Can I make a single computer out of 3 with lxd cluster?

I'm setting up a LXD cluster on 3 machines. Though I'm concerned if a single container (a virtual machine) use all the resources of 3 machine. I mean Does a single container use all 3 machine's CPU?...
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77 views

Where does Virtualbox keep home directory path configuration data? [migrated]

I have reinstalled my system, and simply copied over my old home directory. However, I have also changed my user name. When I attempt to create a new virtual machine, I'm presented with the error: "...
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31 views

Hypervisor support for vGPU + VM suspend?

Short version - how well do current hypervisors support vGPU with VM suspend/resume capability? Longer version: I've used VMware Workstation for many years in my home lab, with the GPU (used for ...
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1answer
61 views

should multiple threads be spun up by kvm/virtio-scsi on the host during IO workload

I am trying to pass-through a scsi lun to guest for best performance. What I am seeing on the host is that with iodepth=64 - 64 threads of qemu process are spun up for the VM. I believe this causes an ...
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1answer
45 views

Is lxd/lxc a suitable replacement to virtual machines (vSphere, for example) for server infrastructure? [closed]

I would like to move my servers to virtual machines. This is because it'll make it easier for me to fire up more machines and back them up in case the physical server is damaged (I'm not aware of ...
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1answer
30 views

Virtualize linux SD-card to xencenter

I have an SD card which contains the root of a physical linux machine. I would like to make a virtual server out of this SD. Preferably without having to run this SD card on a physical linux machine ...
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33 views

ESXi vmware tools recognises CentOS 7 as CentOS 6

I am using vmware Remote Console (VMRC) to access a virtual machine running CentOS 7 with the included open-vm-tools 10309 which are recognised by the ESXi-host. I am able to shutdown or restart the ...
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1answer
52 views

Distribute Virtual machine supporting multi platform of visualization

I would like to create a virtual machine for distribution, My question is - how can I support all the major virtualization platforms? (VmWare, VirtualBox & HyperV) Is there an easy way to ...
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1answer
39 views

vmware ESXi keyboard layout in webconsole screwed up

I'm using vmware ESXI 6.7 (also known as vSphere Hypervisor) on a 64-bit Dual Socket server (2x Xeon X5672, 16 GB RAM). I've got two guests running on it, both CentOS 7 machines (64-bit). Problems ...
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1answer
43 views

New server to setup, docker or VM? [closed]

I'm a developer and I have some doubts about server configuration. We have a new server with a dual Xeon CPU, 128 GB RAM & 4 TB SAS SSD. We have to run some web application. Rails App ( NGINX, ...
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2answers
43 views

Hyper V Virtual Swtich Configurations for single physical network adpater

How does HyperV Virtual Machine > Virtual Switches work? I am installing a Hyper V on Win Server 2012 R2 and it is asking me to select the Network adapter for Virtual Switch. I have only one physical ...
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2answers
140 views

Upgrade windows server HDD without losing any data in RAID1

I have a Windows Server 2012 R2 installed on a system with RAID1 setup which has several services running like Active Directory, etc.. It has 500 GB hard disk as of now. Now we want to upgrade the ...
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35 views

Migrate Windows Server 2012 R2 Data Center to a physical Windows Server 2016

I am assisting a client to move from Windows Server 2012 R2 Datacenter Edition to a physical machine. The server is also running SQL Server which also needs to be migrated. Anyone can suggest the ...
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2answers
92 views

How to specify a NIC number in virsh/kvm?

Hoping I can get some help here. I am using the virt-clone command to get an image of VyOS (open source linux router). The clone works fine but when I copy the image to another KVM host and install ...
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39 views

How to resize lxc/lxd images, if i am using LVM backend?

i am using LXD few years and i am glad to use this platform in my testing environment. But few days ago, i couldn't install Microsoft Sql server 2017. The reason was, that i used default ZFS backend. ...
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1answer
113 views

Reasons to run a software RAID in a linux server running in VMWare

I discovered that one of our servers runs in a VMWware virtual machine and it has a software RAID. The admin is not reachable during the next days. I think a software-raid in a VM does not make ...
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28 views

Imbalanced IRQs on virtio devices

I noticed in the top on my linux server that one cpu had far more number of software interrupts than all other 7 cores. Digging further, I noticed that this core is pinned to a particular irq which ...
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1answer
35 views

do i need to build a vm to use a vpn [closed]

I want to connect to a custom VPN in google cloud platform, and even potentially route that vpn traffic to a different vpn in a separate region using google cloud services. However, I'm assuming I ...
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0answers
120 views

XP KVM stuck at “Booting from Hard Disk”

Just to see if it could be done (and if so, move other physical XP machines to VM environments), I took the hard drive out of a decommissioned laptop, captured a WIM of it, and applied it to a QCOW2 ...
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0answers
34 views

How to migrate windows guest from XenServer 6.5 to Virtualbox (latest)

Does anyone know the simplest way to migrate a Windows 10 Pro (x64) guest from a XenServer 6.5 host to Virtualbox? XenServer is proving to be very difficult to manage for this setup, which is to ...
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2answers
77 views

cpu steal time always 0% possible meaning?

I have several VM hosted by a private service provider. I know they are using VMWare and I believe most of my VM are on a shared hosting. I noticed that the steal time for all my machines is always 0%...
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1answer
105 views

Can't find Cisco CSR1000v image for deploying in GCP

I would like to deploy Cisco CSR1000v on VM instance but I cannot find it among the OS images in GCP, neither custom images and marketplace. I'm following the tutorial below: https://www.cisco.com/c/...
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0answers
38 views

need virtual audio card in Xenserver 7.6

is it possible to have a virtual Audio Card (VAC) in Xen server 7.6 VMs? like linux or windows VMs? I need to use VAC to build a solution that i need to use to inter-connect multiple VMs for audio ...
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1answer
35 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
142 views

Vmware ESXI one hard disk but 2 vmdk files

I have a virtual machine on Vmware ESXI, I have currently a defined hard disk and the size of it is :1.5 TB But when I check the Datastore, there are 2 VMDK files which one of them (the main file of ...
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62 views

Upgraded CPUs in XenServer 7.6 and XenCenter cant see upgraded CPU Count

I recently upgraded my CPUs to a pair of Xeon E5649's (16 core > 24 core). I successfully booted the server and checked the CPU installation with  xe host-cpu-info I can confirm I see the correct ...
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0answers
33 views

KVM VIrtual Network only allow ports 22

I have a KVM host with some VMs The Host has a SMB Share in it All the guest VMs need to connect to this SMB FileShare And i need it to be via virtual network (preverably KVM's 'default' virtual ...
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2answers
524 views

How many VMs can I install on Windows Server 2016 standard?

With 1 Windows Server 2016 Standard (WS2016s) license (running Hyper-V) installed as host on a physical machine, how many VMs can I install on that machine? Is there a limit? Could I install 10 ...
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2answers
46 views

Are other services (like MSSQL) next HyperV on the host system a normal approach?

First of all, I'm not very experienced with HyperV, Microsoft stuff and this could be an opinionated question. Nevertheless I wonder since I've learned about the following situation, if it's really ...
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1answer
44 views

Google Cloud - Monitor running on Microsoft Display Driver instead of NVIDIA K80 GPU

My Google Cloud Instance is running on Microsoft Display Driver,instead of the GPU.I tried to install Hyper-V,but Google Cloud Processors don't support it.Please help,i need to run Unity,but can't ...
2
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1answer
100 views

LVM or not for KVM storage?

Is there any issue with using LVM for your host server's storage pools or raw devices that are used by KVM guest? Eg. say I want to add storage to the /home directory on my KVM guest. I have a Volume ...
5
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1answer
96 views

backup/restore ec2 instance before o.s. update

I have an EC2 instance with an EBS backed root volume. The OS hasn't been updated in some time and I'd like to remedy that, but I need a rollback plan in case the updates cause issues. I think I ...
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25 views

Hardware for virtualization [duplicate]

I need to choose appropriate hardware for virtualize with vmware - 1 windows server 2016 (active directory, wsus, centralized antivirus software...) - 1 windows server 2008 (run 2 server software) - 1 ...
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1answer
171 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
63 views

Lightweight way to graphically connect to guest VMs on “headless” hypervisor

Running a Fedora Server 28 hypervisor (QEMU/KVM with libvirt tools) with Windows- and Fedora-based guest VMs. Normally, the hypervisor runs headless with minimal packages installed, and guest VMs are ...
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209 views

On VirtualBox, is there a way to set 'Reinitialize MAC address' as default?

When cloning a VirtualBox instance, is there a way to set the "Reinitialize the MAC address of all network cards" as the default? Humans sometimes forget to tick this box, with the resulting horror ...
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1answer
64 views

SSH into Xen Virtual Machine connection refused

While practicing for SysAdmin certification, I spun up a virtual machine. I could not SSH into it from my laptop on my LAN. I could SSH into the VM from within the host OS. After some reading and ...
5
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3answers
262 views

What's so great about App-V? [closed]

App-V is one of those technologies that has a small but extremely enthusiastic fan base. And thinking it might be useful at my company, I decided to give it a try. After doing a 2-week deep dive ...
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1answer
65 views

System load on OpenVZ hardware node - is it reliable?

I discovered something that surprised me. On OpenVZ hardware node there is a big load, let's say the load is 210 (it have many CPU cores available but 210 is still high as for this server). But the ...
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107 views

Bridge networking in ubuntu guest on freebsd host using vm-bhyve

i'm a little less learned on bridging thus need help in guest networking. I've setup 2 ubuntu guest on a freebsd vm-bhyve. created a single switch public which has 2 tap insterfaces namely tap0 and ...
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2answers
279 views

Error in enbling SR-IOV with Ubuntu 18.04 on Intel ixgbe - Intel X550 - Dell R640

I'm having issues on creating VF with ubuntu 18.04. SR-IOV is enabled from BIOS, the NIC are Intel X550, I added intel_iommu=on to /etc/default/grub and also tried using modprobe.d by adding options ...
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2answers
41 views

Shared OS VM vs. environment sandboxing?

If I need N virtual machines running the same OS, this simply means I need to install these N machines and then also have to take care of their updates etc etc... Is it possible to have only one ...
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0answers
40 views

serial0 failure when building ubuntu VM on esxi host

I am using packer to build an virtual machine on ESXI 6 host. At some point the process halts and I can see several repetitions of the following message: 2018-09-13T12:48:53.747Z| vcpu-2| I120: ...
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0answers
36 views

amd_iommu=force_isolation.what does it mean?

When I use iommu to passthrough sriov device,I find all VFs and PF are in a same iommu group. Can I use “amd_iommu=force_isolation”? Does it mean every device will have a single IOMMU Group? Does it ...