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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questions with no upvoted or accepted answers
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Apache2 virtual host redirection issue on Chrome
I am having an extremely bizarre issue that seems only present on Chrome, IE and Firefox are fine. I have 2 website being served by 1 IP address, I have 2 identical files in sites-available named ...
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Microsoft Hyper-V: Terminal Server best practice?
We have an environment with maybe 150 users. The users have thin clients and connect to various terminal servers. We just replaced all of the old server 2008 terminal server vms with nice new server ...
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How can I stop Freenas from assigning two disks from different SATA controllers the same device number?
I have Freenas running in a VM in XCP-NG. I've followed the guides and I've dedicated a SATA controller to it using PCI-passthrough. Freenas correctly discovers its boot disk, which is virtual, and ...
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Erase GPU memory
We have Nvidia GPU cards that can be used by different users in an OpenStack environment. A first user creates a VM with access to a GPU card, then deletes the VM when done. Another user then creates ...
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QEMU versatilepb default network adapter
I'm using qemu to emulate a raspberry pi. I'm starting qemu like this:
qemu-system-arm -kernel ./qemu-rpi-kernel/kernel-qemu-4.1.13-jessie \
-cpu arm1176 -m 256 -M versatilepb \
-append "...
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Libvirt & USB Hub Passthrough
I have a virtual machine which I wish to have a USB Hub and all of its devices allocated to a virtual machine.
The Hub in question is a USB hub which itself is plugged into one of the ports on the ...
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How can I provide services to an internal air-gapped extranet
Background - "Extranet"
We have about a dozen users that are on what I would call an Extranet. It is an air-gapped LAN that is physically in the same location as our primary LAN. We share ...
user62491
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(Virtual) Windows Server console: Black screen
When connecting to our virtual Windows 2003 Server (SBS 2003 SP2) via a normal RDP session, everything works fine. However, when connecting with /admin to get to the console session, the following ...
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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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Connect from Windows host to QEMU inside Docker
I am trying to establish a connection between Windows 10 running Docker container (Linux), which runs QEMU to host a QNX OS. This picture should make it more clear:
Structure
I would like to ...
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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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Do I need to create multiple filesystems on a virtual server to increase I/O performance?
I want to install Oracle on a virtual server. I don't really know the technology behind, my company just gave me a virtual server with multiple (virtual) disks.
I have the possibility to divide those ...
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Is SQL Server AlwaysOn in VM cluster not needed?
We have many SQL Server instances virtualized in Hyper-V and participating in AlwaysOn group.
I don't know particular reasons behind decisions that led to this setup.
This week I interviewed 15 ...
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Automatic on premise server deployment
I'm new to automatic deployment and would like guidance from experts on the the best way to efficiently deploy approximately 75 vms (both windows and linux vms) on 7 vmware esxi 5.5 hosts (All hosts ...
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Creating OVF headless with generated vmdk
I am looking to create an OVF file during a nightly build process. I currently have this process creating a qcow2 image, which I convert to vmdk using qemu.
qemu-img convert -f qcow2 ${image_name} -O ...
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Rebuilding VHD RAID array
We have a Dell PowerEdge R420 with a PERC H710 mini RAID controller card. The server has six physical disks split over two arrays; one RAID-1 array for the OS and one RAID-10 array for the data.
This ...
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Why is an unassigned adapter showing up in vSwitch "Teaming and failover" order?
On two out of three ESXi 6 hosts there is an unused adapter showing up in the Teaming and failover section of a vSwitch even though that adapter is not assigned to the vSwitch (see screenshots below).
...
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Allowing outbound internet access with NSX while maintaining micro segmentation
I am getting into the world of VMware's NSX product for the purpose of micro segmenting VM's in the datacenter. That is to say, living in the same network space but not being able to talk to one ...
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Transparently farm processes out to cluster
Situation:
At work, we have an in-house tool for data crunching. When a job is triggered, it starts multiple copies of itself in separate processes and communicates with them in order to crunch in ...
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Best practice for configureing vmware dv uplink port groups?
I'm creating a distributed virtual switch - each host has 2 physical NIC's each of which will map to an uplink port.
I want to create uplink port groups so i can set up NIC teaming, I wanted to know ...
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Autostart VM on Witsbits (ClearVM) Server
I am setting up few VMs on my Witsbits (ClearVM) server.
They are easy to setup and manage but... I would like to start VM together with the server.
The management interface allows for manual ...
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Image build system that derives from a base Windows 8.1 image
For our VDI deployment, we have several Windows 8.1 images for target groups that require different suites of applications.
The current update procedure requires us to update the OS on each ...
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TCP Connection Issue Between Linux Machine and VMWare Windows Server
I have a TCP connection issue as follows.
The setup:
VMWare Virtual Machine: Windows Server 2008 R2 DataCenter SP1, IP: 192.168.2.111, DG: 192.168.2.254
Host Machine: Windows 7 Professional SP1, IP: ...
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Can I convert a physical non-bootable sata volume to a VHD image for mounting in a VM as 2nd volume?
I'm converting physical machines in the office to virtual machines using Disk2vhd, and it doesn't list the second physical hard drive that is in one of the physical machines. Does that mean I cannot ...
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Hypervisor The operation cannot be performed while the object is in it's current state
I attempted to reboot one of my VMs in the Hyper-V Manager. It's a Centos VM and all of my other centos machines are behaving as they should although I can't get this particular one to boot. I'm a ...
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Virtual Machine IP address type changed from static to dynamic
I am testing VMM in a lab environment, I have one VM host machine with one physical network adapter that has been allocated an IP address in the 192.168.1.0/24 subnet on a router.
I have create ...
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How to increase CPU core speed of a guest to maximum of Citrix Xenserver Host
There is a Citrix XenServer 5.5 (HP ML370 G5, Xeon 2GHz) on this Server there is a Windows Guest (Windows 2008 R2 x64) under Properties I set 4 CPU Cores with max prio. But if I check with CPU-Z the ...
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Сan I use IOMMU for VT-d to give each virtual machine one at a time GPU?
If I use VMWare with 4 virtual-machines and 4 GPUs (nVidia Quadro/Tesla), then can I give (move) some devices to different virtual-machines for each by a single card?
If I have one of these CPU, then ...
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Recompose a VMware vSphere machine without personal application data loss?
Our organization has converted a large percentage of our employees to VDI. Our logic is that we create a master image for each linked-clone pool, dedicate each linked-clone pool to specific purposes (...
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How to config libvirt network setting about disabling dnsmasq "except-interface=lo"?
Here is the thing.
My VMs run with libvirt and use default network libvirt-provide, and I've mad each VM registers its hostname to dnsmasq set by libvirt. so I want to look up its hostname for ...
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Debian Squeeze Preseed Installation “The current kernel doesn't support the Logical Volume Manager. You may need to load the lvm-mod module.”
I'm attempting to install Debian Squeeze via an instalinux.com image pre-seeded with more or less default settings. (Only notable addition is the openssh server, which is a clickable option in the ...
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Route specific network traffic through vpn in virtualbox guest
I am running OSX with a windows server 2008 guest in Virtualbox.
My goal is to route some of the network traffic in the host through the server guest. This is because the win2008 server has a VPN ...
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virtual memory commited
After a server bounce happens, and after around 40-45 days time period, we receive continuous “Committed Virtual Memory” alerts which indicates the usage of swap space in the magnitude of >4GB
This ...
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Xen and Turbo Boost
Running the Debian Squeeze default Xen, I am unable to get any of the CPU frequency scaling stuff going.
As soon as I revert to the standard kernel I get it.
Digging through the internet it seems ...
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Specify IP + guest hostname on a virtual machine (without booting it)
My question is simple but I am not sure if it is possible :
Is there a way to specify a custom IP address AND a different hostname before I boot a virtual machine from VMWare Workstation ? (Win 7 or ...
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How to configure opennebula for allowing a cluster private network to host images with public IPs
I am installing open nebula 3.4.1 for running virtual machines a (kvm based) cluster made of 5 computers: a front-end machine having 2 network interfaces and 4 slaves machines with a single network ...
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Performance Implications of running multiple Virtual Servers using one base virtual disk?
I tried looking through old questions, but couldn't find one that hit this exact question.
In VmWare's documentation on Snapshots, they mention utilizing them for a "process tree" setup. This would ...
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xend doesn't bring up the vif interfaces
I'm trying working with Xen and I've tryed to build up a virtual machine in domU.
I'm using the following configuration for the domU
kernel = '/media/home_separata/domU_kernel/boot/vmlinuz-linux' ...
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Exchange Failover causes .ost issues - hownto avoid
Using virtual machine for running exchange and backing it up with a mirror virtual machine in case of failure. During testing of failover and fallback We run into an issue when we fail over the local ...
user240272
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Deploy multiple applications in Cherokee and distinguish them by port?
I am having an issue on deploying applications with Cherokee web server. The thing is I need to host various Django applications in the same machine and distinguish each one by ports (i.e. app1 in ...
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Is there any simple, free tool to track VM dependancies to linked-clones in VMWare?
We have a few "base installations" of various OS environments that we use to create linked clones in VMware Workstation. Sometimes, to save space and because speed is of secondary importance, those ...
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nginx howto correct the path from a back-end server redirect response under a virtual directory
The following was my deployed servers:
client ------ nginx proxy(example.com) ------ back-end server(192.168.1.20)
The nginx proxy's external URL was configured under a virtual directory http://...
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How do I configure a guest VM's static IP address automatically in Citrix XenServer?
To facilitate automation of guest VM provisioning, how do I set (in a script) the IP address on a guest VM's NIC (or NIC's) once a new VM has booted?
Is there a way to "inject" netsh commands via the ...
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How to create an Amazon AMI with HVM from scratch?
All the instructions I find online start with an existing AMI, but I would like to create an AMI from scratch using HVM instead of PV.
Does anyone know the procedure for doing this?
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I can't install windows 64bit on Virtualbox headless
I'm trying to install Windows2008r2 64bit on a Ubuntu 12.04 64bit host. After created the VM (with --ostype windows2008_64 I boot up the installation iso but windows says:
Attempting to load a 64-bit ...
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VMWare and Turnkey Linux appliance can't access network
I have a VMWare ESXi cluster running many Windows and Linux VMs perfectly. I have installed the Turnkey Linux Redmine appliance, and am having a lot of trouble getting the networking to work properly....
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Connect (create ethernet link) between two VMs using their assigned SR-IOV Virtual Functions (VFs)
I have two KVM virtual machines created on RHEL9. I partitioned an SR-IOV-capable Physical NIC such that I was able to get Virtual NICs (Virtual Functions) from it. For each VM, I assigned it a VF.
...
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Is it possible to install and use Dokku on a server that already has Apache2 configured with VirtualHosts running?
Posted this on StackOverflow, but realized it probably belongs here:
I have a Ubuntu (now upgrading it to 22.04) server that runs several virtual hosts with php applications. I'd like to run a couple ...
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963
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qemu-kvm snapshot creations are extremely slow after a few first fast ones
Could anyone help me on this please?
behavior
I'm running several VMs with qemu-kvm and when creating some first few snapshots of a running VM, they are created super fast (roughly 10 seconds). ...
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Cannot install virt-manager, python dependencies
I have a debian 11 machine, I installed KVM on it, and I would like to also install virt-manager, but I got :
The following packages have unmet dependencies:
python3-libxml2 : Depends: libpython3.7 (&...
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