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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When i use virt-install --import, virsh vol-list --pool default return null

I upload my guaji.img file to server, and use following code: sudo virt-install -n guaji -r 512 --os-type=windows --os-variant=winxp --disk #{to_rmt},device=disk,bus=virtio --noautoconsole --import ...
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82 views

Why won't my libvirt VM communicate with apt repositories when wget and ping work?

I'm trying to use Vagrant and Puppet to make it easier to duplicate a multi-server setup for our websites. The recommended workflow is to vagrant up the puppetmaster server specifically first, and ...
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130 views

how to design network for virtual machines with just one nic

for the past week or so i've been recovering from the shock that i have literally no idea how my isp's network works, by getting a new box and trying to do a sensible design from scratch. our design ...
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509 views

lxc command always “get error 4 in libc-2.12.so”

I've tried several time to find out why suddenly my LXC not working, I use dmesg | tail it shows: lxc-start[2777]: segfault at fffffffffffffffc ip 000000390347b82c sp 00007fffd9046c18 error 4 in ...
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68 views

XenServer pool, unable to access certain networks from 2 servers in pool

I have Xenserver pool of of 3 xenservers, at version 6.1. After we got a serious DDOS attack on our network, all servers got rebooted (whole pool of 3 servers got restart and entered into maintenance ...
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91 views

How to handle virtual environments on a secure network

We do embedded software development. As such, we use a wide variety of tool sets for the many different targets that we work with, and we frequently move from one project to the next. Developers ...
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33 views

How to compare and state performance on virtual server instance?

I want to report performance statistics about an algorithm that runs on a virtual server instance with Ubuntu on it. I measured runtime and maximum memory usage but I want to give a statement about ...
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166 views

Convert an HVM ec2 instance into something that can be run on a PV instance

I have a linux VM running on an esx-i server at home, and I would like to import the vmdk to aws using the ec2-import-instance command. However I really don't need this to be any larger of an ...
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676 views

VSFTP and openLDAP based virtual users home directory

I have a VSFTPD server based on CentOS 6, configured to authenticate virtual users against an openLDAP server. I can login to the FTP server, however, authenticated users are not redirected to their ...
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162 views

Red Hat Virtualization, slow DB writes or network from virtual machine

I am running JBoss on both a physical machine, and a VM that runs within that same physical machine. The JBoss instance on physical machine is operating fast, but the JBoss on VM is slow (several ...
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74 views

How to use kexec to do a live upgrade of hotswap ram on a CentOS vm image?

Just as the question states, is there a way and what's the best method todo a live ram upgrade with kexec?
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680 views

CentOS 6.5 Xen Virtual Machine Issue 'this function is not supported by the connection driver'

I am trying to segment my system into a number of virtual machines but just cant seem to get this to work. I think I am close but not quite there. I have install xen, virsh, xl etc and I am using ...
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94 views

How can I export a XenServer virtual machine with all its snapshots?

Is there a way to export a virtual machine running on XenServer with all its past snapshots? I have tried to export a VM through XenCenter (right click on the machine and "Export..."). After importing ...
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348 views

How to install Gitlab in a VM on a production server?

I have a production server running Ubuntu 12.04 and I would like to install on it a VM with Gitlab (using Vagrant and Virtualbox). Let's say that the address to access Gitlab is gitlab.mydomain.com . ...
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401 views

Hyper-V: Ubuntu guests running out of memory

We appear to have a problem with Ubuntu guests running out of memory. We have several on 12.04 (LTS) and one on 13.04 and seem to have the same problem. It takes around 30 days from restart to ...
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351 views

Windows User State Virtualization guide

Microsoft have a concept called User State Virtualization (USV) this is a solution based on redirecting some of the profile folders to a central server. For laptops it also means using offline files ...
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99 views

OSPF on XEN host running several VMs

Is it possible to set OSPFs areas in a XEN environment to setup a virtual cluster? Main intention is to avoid a external router since all VMs will run inside the same machine.
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253 views

Cannot upgrade xenserver,pool master changes automatically to other server

I need to upgrade my XenServer pool of servers from 5.6 to 6.1. The problem i am facing is that when i shutdown pol master to boot it from CD, then it other member in the pool become the pool master ...
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572 views

Oracle Virtual Server OEL vm fails to start - kernel panic on cpu identify

I am in the process of following a guide to setup various oracle vm templates, so far I have installed OVS 2. 2 and got the OVM Manager working, imported the template for OEL5U5 and created a vm from ...
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317 views

ESXi 4.1 CentOS 6.X eth0 unnavailable

I don't usually ask for help so directly, usually google have all i need but this time i'm seriously lost. Hope you can help me .s The thing is, i have a server with Vmware ESXi 4.1 and 5 already ...
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86 views

Setup cloadmin on Centos installed in LVM

I installed CentOS 6 with default LVM partition pattern. according to this pattern Can I use Cloudmin and store KVM Disks in LVM as Logical Volume?
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274 views

XCP vm created via xl create doesn't show up in Xencenter neither in xe vm-list

i am running XCP 1.4.90.530.170661 and i have many PV guests running and created via XenCenter. I have created now an openwrt PV guest via the xl create command but it doesn't show up in Xencenter ...
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40 views

Delivering EMC ISM by NETLAB+

I have made an EMC class with 15 students on NETLAB+. I have done the Pod cloning and assigned a single linked Pod to each student. But when students log into the class, everybody is connected, like ...
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116 views

XEN - (magic) networking issue

I have a very strange situation and do not know where to look. I have a XEN installed on Ubuntu 12.04 LTS. My hosting-provider does require, that every new IP my server uses has an own MAC-address. ...
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219 views

Mounting shared memory in XCP/ XEN Server,for storing VM

Requirement vm with 2HDD each 1gb OS will be installed on hdd 1 and required data on HDD 2 I want all my VM running on Xen Cloud Platform XCP 1.1 to use /dev/shm of host machine for HDD1. Is ...
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135 views

how to deal with backup & restore of private cloud environment?

using Cloudstack OSS - with NFS as storage backend.... How to deal with VM image backup and restore? snapshot backup is preferred softwares like PHD Virtual are built for specific Hypervisor: ...
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379 views

Open file descriptors, Oracle Java 1.7 on Ubuntu 11.04 (GNU/Linux 2.6.38-8-virtual x86_64)

we are having a problem with the maximum limit of open file descriptors. After configuring the server with the settings mentioned below we test to see if the the max open file descriptor is set to ...
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339 views

Virtual networks connected to a computer acting as firewall (KVM)

I have successfully created a schema like this with VirtualBox, but now I have to do a final project and I would like to do it with KVM and Virtual Machine Manager (virt-manager). I am having some ...
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506 views

VMWare player : Ubuntu 10.04 guest on Win 7 host - network not working

I have installed Ubuntu 10.04 (64 bit desktop version) on VMWare player over Windows 7 host (64 bit). I am unable to access network. apt-get fails and I am unable to browse the internet. I tried re-...
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125 views

How to monitor bandwidth on host which uses bridge-util and virtualization

I am running a debian squeeze box with bridge-util and LXC containers. I guess this is a 2 part request. I would like to know what my total bandwidth usage is I would like to see it broken down by ...
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89 views

virt-rescue for Ubuntu

I want to install virt-rescue on Ubuntu 11.10 or Ubuntu 10.04. It could not be found in the repositories. Where can I get it?
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1k views

XenServer 6.0 upgrade pygrub error

Just upgraded our XenServer testmachine from 5.6 to 6.0, one of the vms' (ubuntu-server 10.04 LTS) will no longer boot. Error in XenCenter; 9/11/2011 3:48:23 PM Error: Starting VM 'TestDom-Ubuntu' - ...
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215 views

OpenStack Networking Config

I'm setting up a single node/controller on a RackSpace VM (for testing) I have two interfaces the public one (31.222.162.) and the local network one (10.177.68.) but I dont know how to state the ...
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664 views

LSI 9211-8i won't boot in KVM

I'm running ubuntu 11.04 with an LSI 9211-8i in IT mode with the latest firmware (10). I'm using KVM with VT-d enabled to pass the entire PCIe device through to the guest OS. I have the device ...
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303 views

Virtual PC “The page cannot be displayed” error connecting to iis7.5 site on Win7 host

I setup virtual pc with the Windows XP IE6 VHD to test a site on Windows 7 host. I created a loopback adapter connection on the host. I have several sites on IIS 7.5, I'm able to connect to all of ...
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635 views

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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135 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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243 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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10 views

How to Monitor all virtual host Web traffic in Real-Time in one console

I want to monitor web traffic from each domain I have installed on my dedicated server. All my domains were added in apache as virtual host. I need each domain Google bot hits only basis, and human ...
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13 views

Export or Convert Hyper-V VM to OVA/OVF

I can't find (Google) any documentation on how to export or convert hyper-v VMs to OVA or OVF. The hyper-visor is Windows Server 2012 R2 Standard. The results from Google only point to System Center ...
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34 views

How to install Windows on a OpenVZ SolusVM VM

So I have just installed SolusVM (Master) on a VPS and added a dedicated server as a node to the master. And have also added an IP block to the panel. I have successfully created a CentOS VM through ...
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15 views

No network on XenServer VMs

I'm trying to set up a CloudStack private cloud with advanced networking and I seem to have navigated most of the hard part. The problem now is my system VMs are not able to access the public gateway ...
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55 views

Assign 2 IP addresses to one virtual machine

I would like to assign 2 IP addresses to one virtual machine but cannot make it working. I have IP MAC 151.180.39.138 02:aa:cc:73:b1:39 78.132.120.30 02:cc:aa:79:fb:e7 /etc/...
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15 views

Having different two different public IPs or Xen guests

I'm using XenServer and CentOS. I have successfully configured two Windows Server guests and they both work properly. On the host machine, I have xenbr0, xenbr0:0 and xenbr0:1 (for two different IP ...
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15 views

QEMU image format

I have an image with .qemu format. I looked here to see QEMU supported formats but there is no .qemu. Is.qemu equal to raw? Thanks
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12 views

slow shared folder file append operations (VBox/VMware/CIFS)

The next problem occurs in both Vbox and VMplayer. I am having windows 10 as HOST, and debian 8 as guest. I am developing in both PHP and nodeJs, my plan is to use HOST windows 10 as development ...
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24 views

Hypervisor vs Virtual Machine Monitor

What is the difference between a Hypervisor and a Virtual Machine Monitor? Mostly it is referred as the same but today I started to read a book in which they are different things. After about two ...
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26 views

Virsh cannot connect to Xen server

I have installed the latest version of Xen server 6.5. Now I want to connect to it with virsh (libvirt-bin). When I do this I get the error error:end of file while reading data: sh:nc:command not ...
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28 views

Is there a way to clone/template linux VMs on Hyper-V

I've seen how you can do it with System Center but we don't have a System Center license and there is no plans to get one. I guess I could install a trial for the 60 days just for this purpose but I ...
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14 views

Virtual Machine to Virtual Machine Speed on Same Host and Network

I have two virtual machines on the same esxi host, the same network and same virtual switch. I am testing bandwidth between the two servers but I can't seem to pull more than 900Mbits. I am using ...