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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VirtualBox Ubuntu VM (Windows host) stops resolving names after connecting to VPN on host

I am running a Lubuntu guest VM on my Windows 10 host using VirtualBox (6.0.10r132072). Everything works fine network wise. When I connect to my company VPN, in most cases the VM loses ability to ...
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iptables port forward not working with libvirtd VM

For some reason, I'm unable to connect to my server inside a VM from the outside world, but I can definitely connect to my server from the hypervisor. The server application runs on ports 27500 and ...
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276 views

Nested VM in XenServer

I am new to XenServer. I am having problems getting nested VM to work in my environment. Here is my scenario: I got XenServer 7.6.0 (Free version) running on a bare metal box (SuperServer 1028R-WC1R)....
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Virtual machine memory space forensics

in spite of the fact that the main point of virtualization is having "containerized" environments for every instanced OS without sharing memory space, are there techniques to make forensics on either ...
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Virutal Hosting using XAMPP in AWS EC2 INSTANCE

Trying to host 2 or more domains in a single aws ec2 instance. my configuration is: host: 18.219.39.37 [my domain] httpd.conf: Listen 80 <Directory /> AllowOverride none Require ...
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How can I enable 2D/3D Acceleration with QEMU?

I have a KVM Server running Virtualizor on CentOS 7.6 . When I try to enable 2d/3d acceleration I'm getting the below error message. There was an error while starting the new VPS error: Failed to ...
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VIP create by user-instance cannot access from same network in Openstack network?

I have this example 2 instance in an Openstack network call VM1 and VM2 Both instance use keepalived to create VIP jump between 2 nodes Keepalived config: global_defs { router_id ...
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Access deployed self-hosted engine ovirt

I have configured a self-hosted engine following options shown on ovirt UI. Now I do not know how to access this self-hosted engine. This is what I see on the UI. However, I'm not able to type ...
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QEMU - incorrect real disk size of a virtual drive

df and ls report different sizes on my host machine because of the difference between the allocated size and the amount of space that's actually used in the EXT4 filesystem. The problem is that both ...
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100 views

Setup Virtual Machines with GPU with Intel GVT-g

I'm planning a setup of small office Virtualization that will allow multiple Virtual Machines access to the single GPU. I've learned that this is possible with Intel GVT-g My question is would these ...
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1answer
37 views

Static IP addresses for host and guest VMs on RHEL 7

I have RHEL 7 installed on a development server of ours that hosts two virtual machines, both RHEL 7. I've set up a static IP address for the host that can access our network - I can SSH to the server ...
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230 views

Windows Virtual Desktop Max Disconnection Time

We created some new virtual desktop pools on azure. Now we want to configure that every session which is disconnected ends immediately. We configured this registry key: Registry Hive: ...
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Installing Dell R710 from Scratch

I am building a Dell R710 server from scratch. I am deploying a bootable USB on the internal usb port. The bootable usb contains esxi 6.x and I can't seem to configure the RAID controller from scratch....
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Desktop Servers that support XenServer vGPU

What are the Desktop Servers that support vGPU with XenServer? Example does HP Proliant supports vGPU with XenServer: https://www.hpe.com/uk/en/product-catalog/servers/proliant-servers/pip.hpe-...
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1answer
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How to enable vIOMMU in virt-manager?

I am planning to perform nested virtualization with GPU device. I have guest Ubuntu OS running and I have mapped GPU to it by enabling intel_iommu on the host, and configuring NVIDIA PCI as vfio-pci ...
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108 views

Installed 6.x ESXi on Dell R710 from bootable USB

I have a bootable USB plugged into the internal drive for ESXi, and when looking at the harddrive space, it only show the 32GBs on the usb. The question is, how do I use local server resources such as ...
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Installing ESXI on Dell PowerEdge 710

I'm trying to installing ESXI on my Dell PowerEdge 710 that has 6.6 BIOS version. I'm attempting to flash the software using the internal USB, and everytime it starts to install whether using BIOS or ...
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107 views

Isolate virtual machines from each other and from the internet (VLAN, Mikrotik SwOS)

There is a virtualization server where some of them VMs are assigned a different VLAN ID. There is a switch running Mikrotik SwOS and the virtualization server is connected via one single Ethernet ...
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VNC single app from Linux server to Linux, MacOS and Windows clients

For security reasons, our production machines can not have internet access, however, some of them need to be able to browse the web. It's been suggested to me that the best way to accomplish this is ...
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103 views

Is there any possibility to migrate vm from Redhat Virtualization to Hyper-V?

I would like to migrate VM's from Redhat Virtualization (RHV 4.2) to Hyper-V environment.What are the possibilities over there? Any opensource or third party tools??
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3answers
636 views

Why are GPUs accessible from docker containers running on Linux hosts, but not on Windows or MacOS hosts?

Recent versions of docker (or any version of nvidia-docker) allow direct(?) access to the host GPU from within docker containers, with full access to CUDA APIs. This is very convenient when deploying ...
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1answer
379 views

NUMA 1 not used on SQL Server 2008 R2 on Windows Server 2008 R2 on ESXi

We've got Microsoft SQL Server 2008 R2 running on Windows Server 2008 R2, virtualized on VMWare ESXi 6.7.0. The server has 2 CPU sockets with 22 cores each. The VM is allocated 8 sockets with 3 cores ...
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49 views

Force Hyper-V to use UTC for RTC?

Is it possible to configure Hyper-V to present the Real Time Clock (RTC) to Guest as Universal Time Co-ordinates (UTC / GMT)? I could probably make this happen by setting the Windows (Host) timezone ...
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openSuse 15.1 xenProject -> client VMs no network after update 15.0 -> 15.1

Problem Description I have two identical openSuse15.1 bare metal server running Xen Project Hypervisor. Lets call them server1-dom0 and server2-dom0 All package versions ( xen, libvirt, firewalld ) ...
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1answer
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Virtual Desktop billing calculation method Amazon / Azure or Google

I want to run couple of VMs for charity on Cloud and not sure about billing hence this question. If I create a Virtual desktop / Workspace on one of cloud provider they say they charge per minute or ...
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1answer
660 views

Hyper-V server 2019 – Internet not working for Guest VM

I’m trying something apparently very simple, and I reviewed former posts for 2 days about the subject without success: Setup a Hyper-V Server 2019 On that server, install a Gen-2 guest Virtual ...
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VM Performance on Different Hardware [closed]

I just bought a new server to act as a Hyper-V host for our current VMs. The hardware specs are better than our existing server (faster CPU speed, fast disk IO, etc) and I expect to see our VMs ...
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2answers
133 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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25 views

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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63 views

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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1answer
680 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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191 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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0answers
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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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2answers
29 views

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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38 views

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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1answer
448 views

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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123 views

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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1answer
76 views

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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28 views

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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1answer
523 views

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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170 views

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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1answer
125 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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1answer
35 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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2answers
153 views

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
581 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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3answers
166 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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1answer
96 views

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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144 views

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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