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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how to install Ubuntu over http in virt-manager

I am having a situation where I can not use a CD or PxE boot or wubi to install.I need to necessarily do an http install of Ubuntu.I am basically trying to create a guest OS in a virtualization setup ...
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102 views

Why is connection from Windows Virtual XP hosted on a Win7 box to standalone SQL server slow?

I have an application that will only run on Windows XP and it utilizes a SQL backend server. I am putting new workstations in this office with Windows 7 and installing the software in a Virtual XP ...
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686 views

need some way to convert QCOW2 to OVF or open QCOW2 on WINDOWS

is there a way to convert QCOW2 to OVF? or is there a way to open an QCOW2 on WINDOWS (preferably free/open source)? the problem is that ubuntu's virtual machine manager was used to create the image ...
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224 views

DOS path not resolving in VM

As a developer, I had our systems team setup a VM of a server to practice an upgrade of an old third party application. This server has its own instance of SQL Server 2000 that's used exclusively for ...
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12 views

mounting logical volume attached to vm while vm is running

i am experimenting lvm2 and qemu-kvm. and I want to share and ask some questions. at the end of there is appendix what i am doing. a logical volume on host is attached on guest host (vm) as vda. this ...
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17 views

How to convert clonezilla backup image to virtual machine?

I have a 30gB tar.gz disk image of a physical debian machine, created by clonezilla - what's the easiest list of steps to follow to convert it to a virtual machine? Do i have to necessarily make .iso? ...
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18 views

CoreOs VM getting deleted after shutdown on libvirt

I installed CoreOs on libvirt using link https://coreos.com/docs/running-coreos/platforms/libvirt/. The VM is also showing inside Virtual Machine Manager and working fine. The problem is once I ...
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48 views

Amazon AWS EC2 instance Exported to local machine

I have several Amazon AWS EC2 virtual machines that I created on AWS EC2. They were not imported, they were created there. I would like to export these machines in order to achieve local backups, ...
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21 views

What is causing `skb rides the rocket` errors?

On one of our busy (virtual) Debian 6 servers we are seeing a lot of messages in the syslog like this: kernel: xen_netfront: xennet: skb rides the rocket: 19 slots We are seeing some connectivity ...
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29 views

Can't Create Win 7 VM with RHEL 6.5 VMM

I have a server running RHEL 6.5 that I primarily run VMs on it. The VMs I run on it are all Linux, with the exception of one that runs Server 2008 R2. Yesterday, I attempted to install Windows 7 as ...
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15 views

ssh server stops on ESXi 5.5 for no reason

I have a ESXi host that I have never been able to access via ssh. I have tried every tutorial I can find on enabling ssh via the command line and the vSphere client to no avail. I enable the ssh, ...
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37 views

OpenQRM installation on Centos - database initialisation runs into timeout

I installed OpenQRM on a fresh CentOS 6.5 from the latest source code as described here: ...
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75 views

Guest-VM can only ping CentOS KVM host, cannot access anything else

[root@KVMHOST]# ifconfig br0 Link encap:Ethernet HWaddr 00:1E:67:6B:17:2F inet addr:200.200.100.54 Bcast:220.225.255.255 Mask:255.255.0.0 inet6 addr: fe80::21e:67ff:fe6b:172f/64 ...
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24 views

Xen memory management

In real machine, I can reserve a certain of memory by editing grub to limit memory,which the machine can use, and then mapping the reserved memory using ioreamp. I can manage these memory and insert ...
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214 views

Convert VHD to use on QEMU KVM

I try to convert a .vhd file (VPC) and get this error. I tried different .vhd files without success. I tried also with a fresh exported VHD with disk2vhd and backup Hyper-V .vhd. qemu-img convert -f ...
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22 views

Multicasting on guest Operating System

I have 6 guest Operating Systems (windows server 2008) on a vmware 9.0 My host OS is Windows 8.1, And GNS3 installed on the host OS, where I have my topology with 3 routers configure with multicast ...
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23 views

Network error when running multiple Virtual Boxes

I have a Ubuntu 14.04 physical desktop that's running some Virtual Box instances (also Ubuntu) through Vagrant. The Virtual Box instances are configured to use static ip and with "natdnshostresolver1" ...
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37 views

Is it possible to Create a local Virtual Machine (vmWare) from a remote Ubuntu 14.04 installation

I have a bunch of Ubuntu 14.04 machines hosted at a host using their CloudHosting VMWare packages. I have tried to download them but it's not supported. Is there any way to backup my servers and run ...
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163 views

Virtualization-(Cluster) with KVM/libvirt on top of a FC SAN

I'd like to set up a 2-node HA-Cluster based on Ubuntu and KVM running about 30 VM's. Both nodes are connected to a HP MSA(5TB) via Fibre Channel. Multipathing's already working and the nodes are able ...
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58 views

Dealing/Fixing the Ploop issue with OpenVZ — relclaiming lost space

So OpenVZ Ploop has a bug where if users add then delete files the space becomes unclaimed and the disk eventually runs out of space. Now there is a script that fixes that(included below). However, ...
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69 views

Restoring read only domain controller from VM checkpoint

I have several RODC on remote sites, and sometimes power failures corrupts ADDS database which takes some time to recover. I'd like to move RODC to virtual machine (on same server) to be able in case ...
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61 views

KVM virtual IP address not working on HOST, works on GUEST

I have a setup composed of the following: -> A HOST running KVM with the following network configs: # The loopback network interface auto lo iface lo inet loopback # The primary network interface ...
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47 views

Dynamips Virtual Router not pinging external host after bridging

I have setup a virtual router image with dynamips and setup bridging between tap0 interface of the virtual router and eth0 and br0 with commands [root@cisco_host]# brctl addbr br0 [root@cisco_host]# ...
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49 views

clonehd takes 2 hours for a 100GB disk. Expected?

I have a VirtualBox image using VDI and flexible size. Right now the physical DVI file 94GB. The host is an Ubuntu server and the guest is a CentOS 6.4 with ext4 partition. The host is using a sata ...
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187 views

CentOS Host KVM Virtual Machine running a Windows VM - No internet access

I've installed a KVM virtual machine on a CentOS host using libvirt. I've also set up a bridged connection from the interface en0:4 running on IP x.x.x.15 to br0. (The IP is a public one). Running ...
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161 views

Error while booting VMDK in VMWare Player; UNMOUNTABLE_BOOT_VOLUME

Hi all and thanks in advance for taking the time to read this. My employer has provided me with three VMDK files, each representing a different hard drive of a VM. My aim is to get these converted to ...
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14 views

Are Xen 4.1 virtual machines compatible with XCP?

I have a couple of vm installed with Xen 4.1 (basic Xen Hypervisor), now I would like to install XCP packages on my wheezy server. I've read that XCP took control of the server disks and network ...
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288 views

Kickstart “Unable to download kickstart file. Check parameter”

So I'm using 2 VMs (CentOS 6.0), one acting as a build server, the other is a new server I'm trying to build with a kickstart. When I start the VM for the new server (with the build server already ...
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28 views

Boot to last VM status on XenServer reboot

I have a Citrix XenServer 6.2 on a non-prod enviroment, which means that could be affected by power outages from time to time. This server has a lot of VMs, some of them are power on and other not. ...
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621 views

ESXi 5.1 SCSI and NMP Errors Filling vmkernel.log

On a group of ESXi 5.1 systems, I am seeing the following errors every 5 minutes or so: 2014-04-04T11:22:45.374Z cpu1:8193)NMP: nmp_ThrottleLogForDevice:2319: Cmd 0x1a (0x4124022be3c0, 0) to dev ...
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67 views

Xenserver firewall consideration

We are setting up Xenserver for a production environment with seperate VMs for a website, billing, control panel, mail. My question is, should we rely on each server's IPtables or is it necessary to ...
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26 views

Jumphost VM not able to communicate with LAN

I have setup a jumphost VM on WinXP. It has 2 NICs. NIC1, which is the LAN, has the following IP settings: IP: 10.0.0.1 /24 (No default/ DNS configured) NIC2, which has external connections, has ...
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43 views

How does Xen resize VMs without shutting them down?

I'm experimenting with Xen on a spare machine and I noticed that it can resize the RAM and CPU allocations of my VMs without shutting them down first. VirtualBox, VMware Fusion, etc. can't do the same ...
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158 views

How do you migrate kvm guests from virtualizor to solusvm ?

I have a server that until recently had virtualizor in standard setup (and hosted a few guests - all kvm) / 200 Gb /vg_guests - 3.4 Tb Recently i stopped and disabled virtualizor services and ...
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20 views

How can I see which Xen guests are using which cpu pools?

xm cpupool-list will show how many domains are on each cpupool xm cpupool-migrate will move a domain to a different pool But I can't find a command to show which cpupool a domain is using, or which ...
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68 views

Xen (SolusVM): Guest Windows partition is not auto-allocating free space

We are creating guest VM on Windows Server 2008 from the template we've built before but when we are giving our guest VM more disk space from the beginning it's not auto allocating that space. So when ...
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26 views

Automated hostname availability for OpenVZ environments

for several years now I am administrating some OpenVZ Hardwarenodes with a fairly low amount of containers per node (10-20). I'm about to setup a new machine, and what's always bothering me is the ...
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115 views

How to diagnose sporadic performance issues?

I have a web application with very varying response times and can't find out what causes that. That's the (quite complicated) setup: Powerful (i7, 32GB RAM) dedicated server in a German data center, ...
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311 views

XenServer open vSwitch performance downgrade

I'm trying to capture part of an inter hypervisor traffic between 2 virtual machines running over XenServer 6.2. I want to mirror some TCP sessions to a 3rd virtual machine with minimum affect to the ...
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230 views

Azure VPN shows connecting but I can ping/rdp from local network

I set up a virtual network on Azure and connected it with Site to Site VPN to my local network. I am able to ping and RDP to the VM's in Azure from my local network. The problem is that the VPN ...
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627 views

Dell 12G R720 Hyper-V host virtual/physical NIC stops working

On the host 1 physical adapter is plugged into our network, on host itself I have Hyper-V role. I have created a external switch and binded it to the physical Broadcom NetXtreme Gigabit Ethernet, box ...
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113 views

macvlan on host, macvtap guest, routing via host gives error

I have a setup on CentOS 6.5 Host configuration: macvlan0-> 10.0.0.2/24 ppp0 -> connected to the internet Guest configuration macvtap0-> 10.0.0.4/24 gateway -> 10.0.0.2 Other host ...
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704 views

Citrix XenApp FOSS Alternative

I'm looking for some Free and OpenSource Alternative to Citrix XenApp. I need to serve some Apps to Linux boxes from a Windows host. I've came across Ulteo OVD but it lacks Native Clients and Seamless ...
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121 views

Proxmox “File Does Not Exist” Error

Something happened to my Proxmox server and now some VMs won't boot. When I try to boot one in particular, I get the message: proxmox:~# qm start 103 volume 'Backups:103/vm-103-disk-1.raw' ...
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96 views

opensm reports - Invalid requested MGID. What does it mean?

I've been working on a virtualized SR-IOV infiniband interface under Xen. If I run the OpenSM daemon under Dom0 IPoIB appears to work in the passed through VF. However, opensm starts using a lot of ...
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70 views

Hyper-v takes a long time to create snapshots

I'm not sure when, but I've noticed as of recently, whenever I go to make a snapshot of certain machines, it hangs at 2% for a good while and then eventually finishes (fairly quickly, actually). I ...
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69 views

How to detect on Linux that given MAC (HWaddr) is a virtual MAC and will change after rebooting?

Is it possible on Linux to detect automatically that given MAC (HWaddr in ifconfig output) is a virtual MAC and will change after rebooting. or alternatively is there a way to detect virtual network ...
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43 views

how to programatically create an ubuntu vm

I have to create an ubuntu virtual machine within kvm/libvirt with a specific configuration for a specific set of tasks. I want to do it in a programmatic and reproducible way. I checked out ...
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192 views

Why does Xen fail to create domUs/start the virtual network interface?

I have received two errors while trying to create a new domU on Xen. First, I received this error: Unable to complete install: 'POST operation failed: xend_post: error from xen daemon: (xend.err ...
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57 views

How can I virtualize a running server but exclude directories so the resulting image is smaller than the drive

Following situation: There is a Ubuntu 10.10 Server running with many custom configurations and programs (can't set it up from scratch). One of these programs stores a lot of data (> 1TB) in ...