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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 ...

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10 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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8 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
53 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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14 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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0answers
10 views

10 Virtual Machines on a dedicated server [duplicate]

I want to deploy 10 virtual machines on my dedicated server. I purchased 4 servers with these specifications: Intel 2xE5-2430v2 My question is, with this spec, will I be able to deploy 10 virtual ...
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0answers
15 views

Windows Server 2016 Hyper-V Role connection fault [closed]

I have a Hyper-V server (Win 2016) which has been set up and the V-Ethernet has been configured as an external network and allowed to share with management OS network. The vErthernet has a static IP ...
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1answer
24 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
39 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
15 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
49 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
49 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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7 views

How come OS X allows multiple virtualization software at the same time while other systems don't? [migrated]

I was surprised to experience that VirtualBox and docker's HyperKit can run VMs at the same time on OS X. Using different hypervisors at the same is not possible on Windows or Linux. How come it works ...
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0answers
20 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
29 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
88 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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29 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
26 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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0answers
35 views

“HD Image” to the virtual storage on IPMI of Supermicro server

I can find that virtual "HD Image" can be loaded over IPMI of Supermicro server. This is the virtual HD image section of the IPMI manual There are a few types of virtual HD So I don't know what type ...
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0answers
55 views

Disk access too slow in ubuntu virtual server

I have an ubuntu 18.04 virtual server, and I believe there is something wrong with the disk access. opening normal small files takes a long time and websites frequently time out without any specific ...
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0answers
24 views

No write permissions in shared folders KVM

I shared a folder from my host to guest using this guide https://www.linux-kvm.org/page/9p_virtio In example they are using old GUI version and now you cant set Type Passthrough and Squash. You need ...
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2answers
90 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
36 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 ...
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1answer
47 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 ...
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1answer
94 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
78 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
57 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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119 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
48 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 ...
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3answers
251 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
60 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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5 views

are there any way to remount group folder from virtualbox?

I would like to know if there are any way to remount my group folder from VirtualBox VMs folder with its configuration as before? I had to format my / partition , and I Have my vms on my home folder , ...
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0answers
79 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
148 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
33 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
20 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
29 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 ...
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1answer
58 views

Running VMWare Workstation 14 on a VM [closed]

I have set up VMWare Workstation on a esxi 6.0 hosted VM. (Ubuntu 16.04.05) I am trying to run some packer builds that use the specific (VMWare Workstation) hypervisor. The builds get stuck ...
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4answers
102 views

Do not show all docker containers to a particular user

I want to use one server to host multiple docker-containers. I want to give another user a possibility to manage new docker-containers, but I do not want to give him access to all other containers, ...
2
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1answer
233 views

ESXi Passthrough hard drive to use ZFS on VM

I have ESXI 6.7 installed on my r710. I have 1 2TB drive that's being used as the boot drive for ESXi and the VMs. I have 3 4TB drives that will be large storage. I want to send the 4TB disks ...
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0answers
48 views

Bridging Wireless interface on Linux

Someone told they actually bridged a wifi interface on Linux, others says this is not possible. I would like to bridge a virtual-machine (kvm+qemu) interface to the host wifi network, is this ...
0
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2answers
46 views

Is there any performance benefit to Bond Virtual Adapters?

I am using XenServer and wondering if there are any performance benefits to bonding two "virtual" network adapters on a virtual machine? I am certain it would benefit a bare metal server (make one ...
1
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1answer
927 views

Failed to get an SSL thumbprint of the target server certificate, when trying to install vCenter 6.5

I am trying to install vCenter 6.5 on windows as a standalone server and I am getting that error message. Does vCenter 6.5 need to be deployed as a VM on an ESXi host? If it can be installed on a ...
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1answer
223 views

How to set up pfSense/OPNSense on virtual host?

I'm a little confused as how to to host a *Sense box as a VM and have it provide routing for the host. Internet -> Modem/Router (bridge mode) -> en1 on Dell r710 -> OPNSense in a VM Then ...
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0answers
41 views

How to enable swap in OpenVZ container?

The problem Recently I decided to rent a $1.00/month VPS. I knew there was going to be a catch for the price and the specs and I think I've found it... I cannot create swap files as they VPS provider ...
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0answers
101 views

Vagrant ubuntu box configure keyboard layout

I am deploying a vagrant ubuntu 18.04 box, using the default bionic64 box. Installing the gui with these deb packages, via apt install: gnome language-pack-de language-pack-gnome-de even setting ...
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0answers
37 views

2nd VMDK disk never appears in linux when deploying via ova

I started with a qcow2 CentOS image that I converted to disk1-vmdk1. The qcow2 downloaded from CentOS website already had Linux on it. Now when I try to add a new disk, it never appears when the VM ...
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0answers
101 views

How to isolate IOMMU device for PCI passthrough?

One Ubuntu 18.04 host system has below IOMMU groups and devices. $ for a in /sys/kernel/iommu_groups/*; do find $a -type l; done | sort --version-sort /sys/kernel/iommu_groups/0/devices/0000:00:00.0 /...
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0answers
38 views

How to implement redundancy with VM Ware + connecting remote office?

We have a company with 20 workstations in NY and 6 in a remote location in Europe. The server in NY is the domain controller, NVR for the security cameras, file server and stores profiles and user ...