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 ...

learn more… | top users | synonyms (2)

0
votes
1answer
54 views

Re-add Machine to domain without Renaming it? Cloned Virtual Machine issue

So I have some old XP machines that are being kept around to run an ancient DOS based database we still need occasional access to. I decided to instead of dealing with all these old buggy machines to ...
0
votes
2answers
633 views

pages_sharing and pages_shared difference in ksm

Can some one please help me understand this. i am running kvm hosts with 5 vms on it. These are ksm driver statistics each page is 4KB cat /sys/kernel/mm/ksm/pages_shared 162221 cat /sys/...
0
votes
0answers
9 views

configure burst ram for openvz container

Can somebody help me out as to how can we set the burst ram for OpenVZ container using proxmox API. I tried using the following command but with no success: pvesh set /nodes/pve/openvz/{vmid}/config/ ...
2
votes
2answers
542 views

Any known fixes for Hyper-V host networking randomly stops responding?

We run several HP DL380 Gen8 servers as Windows 2012 R2 Hyper-V hosts. Randomly, they stop responding on the customer NIC (ie the one connected to the virtual switch). Customers are disconnected from ...
8
votes
2answers
14k views

Why does increasing “Number of logical processors” for a Hyper-V hosted VM increase that VM's performance?

To my understanding, virtual machines (assuming Relative Weight is equal) get an equal share of the processor. When the VM is given some processing time, it shouldn't matter if the VM is seeing a ...
0
votes
1answer
35 views

“eth0 does not seem to be present” on RedHat despite new MAC address

I created a RedHat VM (6.5) on an Ubuntu (14.04) server. I changed the IP address to something unique in /etc/sysconfig/network-scripts/ifcfg-eth0. I changed the MAC address for eth0 /etc/udev/rules....
2
votes
2answers
96 views

How to require all network activity to pass a KVM guest firewall before reaching the host?

Most of the information I've come across tends to set up a KVM firewall using a bridge connection. From my understanding it is a security risk if network traffic can reach the host without having to ...
1
vote
1answer
64 views

pfSense security: is the host of a virtual pfSense firewall accessible via ssh when the network interface has been assigned to pfSense?

Can the host of a virtual pfSense machine be accessed (via ssh) when the WAN interface is assigned to pfSense? Would the drivers need to be installed on the host, guest or both? Would it respond to ...
0
votes
0answers
35 views

Cant set extra option to VPS in proxmox 3.4

I am using Proxmox VE 3.4 to create an openvz container...i was able to create a vz container but i want to know are the advanced option like VNC, ppp, tun tap feature available in proxmox VE on any ...
2
votes
1answer
2k views

What is the host key of Windows 7 Virtual PC and where can you change it?

Does anyone know which key is the host key of Windows 7 Virtual PC and where I could change it to a different one? Before Windows 7 the host key was changed in the option menu of Virtual PC but the ...
1
vote
1answer
24 views

Distribute application as virtual machine but require external storage

I'd like to distribute a Web application as a VM image in order to make distribution, installation and maintenance as easy as possible for customers (virtual appliance). This image should include ...
0
votes
1answer
35 views

Confused about virtual network interfaces needed for network

I am relatively new to networking and have researched a lot about the topic however I am still confused as to what kind of virtual set-up I need. I have linked a diagram of the network over here: ...
1
vote
3answers
224 views

Learning about Running Ubuntu Server

I want to learn about how to run a Ubuntu Linux Server. Nothing too advanced. I simply want to learn about the basic setup and operation of a server to do the following things: SVN Apache Web Server ...
5
votes
4answers
8k views

Possbile to port a KVM VM to Amazon EC2?

We currently have our own servers that have multiple KVM guests. If we ever decide to move to the Amazon EC2, would it possible to simply copy the VM image over or would I need to begin reconfiguring ...
1
vote
1answer
59 views

Windows DHCP MAC-Range to Scope allocation

I wonder if there is any options to map a specific Range of MAC addresses to a specific DHCP address scope. The thing is, I want a specific scope for address allocation to bridged Virtual Machines (...
7
votes
8answers
7k views

Virtual machine image compatibility between VMware Server and VMware Player

I'm trying to minimize the number of different product versions used on my PC's both at work and at home. So far I have a mixture of: VMware Server 1.0.7 VMware Server 2.0.2 VMware Player 2.5.3 ...
4
votes
4answers
248 views

Which VM needs more resources?

I have a physical server which runs 8 virtual machines with virt-manager and kvm. Since one VM is not needed any more, I want to give the remaining virtual machines more resources. I'm looking for ...
-1
votes
1answer
798 views

ovs-vsctl: “eth0” is not a valid UUID

I'm trying to setup an open v-switch inside my Ubuntu 12.04 Server VM. I have created three interfaces for this VM and I want to create a port mirror inside of the VM using these there interfaces and ...
1
vote
3answers
88 views

Finding IP Of Remote Host Machine By IP Of Guest Machine

I am trying to find a way to figure out on which of the servers the virtual machine actually is residing. I know the ip of the virtual machine. It is in a bridged mode on the local network inside one ...
0
votes
0answers
65 views

VMware Horizon View 6 Connections Fail w/ Changing Server Names

One of our Horizon View machines has intermittent issues connecting to its host via PCoIP. I do not have extensive Horizon View experience, but when looking through connection logs, I noticed that ...
0
votes
1answer
106 views

Is it a bad idea to virtualize DC, DNS and DHCP?

I'm planning to set up a small environment with a Domain Controller, DNS and DHCP using Windows Server. My question is in other words not for a huge world-spanning enterprise network solution (and I ...
1
vote
4answers
195 views

Virtualization that is distributed on workstations or on a big central server for testing and documentation?

We are contemplating a push for employing virutalization for our test and documentation group to help manage consistent test and documentation environments. We were looking at choosing either a couple ...
0
votes
2answers
1k views

setting CPU cache size and model for KVM guest

Is there any possibility to create a custom CPU model for KVM Linux guests, or at least to modify parameters such as cache size and model name? I know I can set CPU features, topology and pinning and ...
3
votes
2answers
1k views

Ubuntu LXC 14.04 Error

I had installed LXC in ubuntu 14.04. I had used an existing template and created a VM by executing the below command. /usr/share/lxc-templates/lxc-ubuntu -p /lxc/vm0 After the installation getting ...
0
votes
1answer
251 views

Do any hypervisors support vTPM?

I am trying to use vtpm to provide remote attestation for VMs, but I do not know what hypervisors support vtpm. Does anyone know?
2
votes
2answers
147 views

Is Server Clustering Right for a 25 Person Business?

Company owner wants high availability as even a 1 hour downtime kills billable revenue for 20 accountants. I've got a one year old Dell PE T110-II running 2012 Standard and an ancient PE 840 running ...
3
votes
2answers
19k views

Can't ping host from vmware guest using bridged networking

Host is Windows 7 Guest is Ubuntu 11.04 Network adapter is wireless I can ping other computers on the network but not the host. No firewall are involved. Sniffing the traffic with wireshark it ...
3
votes
1answer
58 views

Ensure docker pulls most current image

Assuming I have registered a repo at Docker Hub, called MyRepo. Assuming I am working on a Docker image called MyImage. Assuming I have configured Docker Hub to build images from Dockerfiles ...
0
votes
0answers
38 views

How to alias default gateway IP address

The problem is the following: I have got two dedicated servers at OVH. I have got few virtual servers (KVM+libvirt) and I want to migrate them between two hosts. I already managed to make live ...
5
votes
1answer
13k views

why is kswapd using high CPU on an idle system?

I have an idle Linux centOS system and yet kswapd is using 100% cpu. All I have running is a single bash session with top running.... I have 32G RAM and yet kswapd is constantly using 100% cpu for ...
0
votes
0answers
86 views

Proxmox safely remove node from cluster without deleting vms

I have 2 nodes, each of them on a separate device. I joined the second node to the cluster to migrate a copy of one of the VM's to it. Now I can't login to the web manager of it, just can login to ...
1
vote
2answers
706 views

ESX: Get VM uuid/name from within VM

Is there a way to get a VM's name or UUID from within the VM itself, for a VM that is running on a VMWare ESX server? If so, what is the way? My use case is: I'm cloning a bunch of VMs. A program ...
5
votes
5answers
6k views

What is the best distro to host a KVM virtualization solution

I am looking for a Server oriented distro that we can expect have decent support but also offer as much as possible some of the latest features that KVM might offer. I am leaning towards Ubuntu LTS ...
6
votes
1answer
15k views

How do I delete a VM from 'virsh list -all'?

I created a VM using vmbuilder but I realize that I had set some of the flags incorrectly. Now when I do a virsh list -all it still appears, laughing at my novicity. How do I delete this? (I've ...
0
votes
1answer
97 views

Setting up network connectivity between 2 VirtualBox Windows VMs

I am attempting to set up a set of VMs on Virtualbox and have configured one as a DC running Windows Server 2008 R2, and it's intended to function as a primary DNS server. I have created a reverse ...
2
votes
2answers
1k views

virt-install kept on adding --no-reboot - even though I don't want it to

I have a bit of a problem getting my guests to reboot after the OS installation using virt-install. For whatever reason, virt-install insists on inserting "--no-reboot" when you create a VM: LC_ALL=...
-3
votes
1answer
73 views

Slow http response time from vm [closed]

I am currently hosting a test website under a 8 vcpu and 2gb ram virtual machine using nginx and php-fpm, the host machine is hosting other virtual machines doing the same thing with 10gbps network ...
0
votes
1answer
36 views

Volumegroup using entire disks instead of partition - Extending online Vmware

Is it possible when using entire disk for volume groups to extend the assigned disks space from the vmware console, and then online the volume group after rescanning host to know the new size, or to ...
0
votes
0answers
11 views

Get direct block addresses - Sleuth kit - XEN

I am using sleuth kit library in order to write an introspection tool for XEN hypervisor and my question is if we have the inode number of a file on a disk [ guest VM - ext4 filesystem], for example ...
1
vote
1answer
103 views

Options for optimising QEMU emulation (-cpu flag)

I have been doing some reading about optimising QEMU and one thing that I am confused about is the -cpu switch. At the moment I am using -cpu host which is supposed to transfer all the hosts cpu ...
20
votes
12answers
33k views

Is it possible to setup a virtual machine inside another virtual machine

I have been playing with virtual machines latley, and wondered if I could run a virtual machine inside a virtual machine? Is it possible? Is it practical?
1
vote
1answer
131 views

Hyper-V host memory requirements. Possible over allocation to guest VMs?

System: PowerEdge R430 Intel Xeon E5-2440 (dual) 32GB RAM Hyper-V 2012 R2 VMs: DC - 8GB RAM APP - 19GB RAM The VM's are not configured for dynamic memory. The client was complaining about ...
0
votes
1answer
109 views

Proxmox Virtualized Client (Network Configuration)

first some information about me. I ordered a server from ovh and purchased one failover ip to test proxmox and do some training. The main Server is hosting proxmox(Example IP: 123.45.67.89 to figure ...
1
vote
4answers
5k views

How can I change Qemu KVM machine architecture from 440fx to q35 with virsh edit or virt-manager

Still trying to get GPU passthrough working and decided to change machine type from older 440fx to q35 ie pc-q35 but if I do virsh edit on the config it refuse to save saying "PCI Bridges not ...
6
votes
4answers
7k views

Convert directory to QEMU/KVM virtual disk image

I have a directory filled with data at /var/backups/disk1 that I want to convert into a virtual disk image which I'll then be able to boot using QEMU or KVM (the directory contains the file system for ...
8
votes
2answers
3k views

Does enabling hardware x86 virtualization (AMD-V or Intel VT-x) slow down my computer if I'm not running virtual machines?

Does enabling hardware x86 virtualization (AMD-V or Intel VT-x) slow down my computer? Obviously, it improves the performance if I'm running virtual machines, but what if I'm not running any VMs?
1
vote
0answers
45 views

Efficiently managing multiple Windows 7 VMs

I will be running several (at least 10, probably more) Windows 7 virtual machines on a Linux server and I am looking for a way to manage this efficiently. All the machines will be identical except for ...
2
votes
0answers
18 views

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 ...
2
votes
1answer
197 views

Missing memory on ESXI 6.0

I have an ESXI 6.0 with 8GB Ram. For some reason I can only use 4.7GB for VMs. I tried using esxtop but didnt see anything using lots of RAM. Below are screenshots from vsphere. Can anyone help me to ...
2
votes
1answer
85 views

Virtualized X Server on Host Machine

So, I'm trying to tackle a rather odd issue. I'm fairly new with virtualization (the most I've managed is isolating some applications with Docker and VirtualBox, which isn't hard to do). I am more ...