A virtual machine (VM) is a completely isolated guest operating system installation within a normal host operating system. It is a software implementation of a machine (i.e. a computer) that executes programs like a physical machine.

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180 views

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 ...
1
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1answer
744 views

Removing a cloned virtual machine from an AD domain

Scenario: we're in the process of setting up central virtualised server that acts as a demonstration environment. This VM (running Windows 7) will be cloned and put on sales laptops so demonstrations ...
3
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2answers
290 views

Hardening Virtual Machine

I have a CentOS based product I'm looking to distribute it as a virtual machine (VMWare, XEN and KVM) and I have been lately assessing the steps needed to protect the VM. The VM's data shouldn't be ...
0
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1answer
448 views

In ESXi server, Why consumed host memory is more than allocated memory?

I am using ESXi 4.0 and ESXi 4.1 for my VM needs. I have allocated a VM with 4 GB RAM. Recently the user of that VM complained that he is unable to access the VM. I was trying to connect it through ...
0
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1answer
172 views

How to connect to a VM created by VirtualBox? [closed]

I have created a Fedora VM using VirtualBox and also have set the networking adapter to bridge mode. Inside Fedora I've set the ip to be 192.168.1.14. Now if I issue a ping from my Host machine (Win ...
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3answers
1k views

How is virtual machine port opening works

I have a question regarding VM port. Say I have a Virtual Machine and a Host Machine. The opening ports on Host are 80, 22, 443 only. if I opened ports 80, 22, 443 VM it should be working. However ...
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2answers
213 views

Windows based development environment: HyperV, VMWare, or VirtualBox on development machine? [closed]

I am a software engineer with a little bit of an informal "support" functionality... I am trying to figure out what is the best possible approach to employing virtualization technologies into our ...
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1answer
353 views

Assign arbitrary MAC address in VirtualBox VM

Is it possible to assign an arbitrary MAC address to an VirtualBox virtual machine instance? This answer suggests that it is only possible to generate MAC addresses where the most significant byte is ...
1
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0answers
711 views

Unable to connect to vrde virtualbox VM remotely

So I've remotely created my first headless using ssh. Now I'm attempting to connect to this VM using RDP so I can install Ubuntu Server, but I cannot get connected at all. When starting the VM ...
18
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5answers
705 views

Is there a reason to give a VM a round base-2 amount (2048MB, 4096MB, etc) of memory?

The title pretty much says it all, is there any advantage to giving a VM 2048MB of memory instead of rounding to base-10 and doing 2000MB?
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2answers
286 views

iSCSI basic concepts

I have just detected that in one of my hosts (this is a virtual machine run by a cloud provider) there is a process eating up some bandwidth: NetHogs version 0.6.0 PID USER PROGRAM ...
1
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1answer
169 views

How can I know if a VM is used or not?

I am running ESXi 4.1. In my main datastore I have plenty of folders, some of them has logical names, while the others don't, they hold BASE configurations/images of clients that I duplicate and ...
2
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2answers
408 views

typeperf.exe Intermittently Returning -1

Edit: Sep. 26 2012 - I am updating this question and its tags because I have now encountered this error again, on a Server 2k8R2 VM. Still, there seems to be no authoritative information out there on ...
1
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3answers
629 views

CLI-Based monitoring tool for KVM

I am developing a scheduler for running VMs on KVM. The scheduling has over-commitment of resources like memory and CPU. For this, I need a CLI-based monitoring tool that keeps me giving information ...
0
votes
1answer
98 views

Need a VM for running a PHP Sandbox [closed]

I am working on Web application honeypot. It collects PHP files it receives (as part of an RFI attack) and runs them in order to return the result back to the attacker. The aim is to coax the bad guy ...
0
votes
1answer
235 views

Why same internal ip and external ip? [closed]

I obtained a virtual server(running ubuntu 11.01) in a cloud with 1 static ip. I tried to ifconfig so as to obtain internal IP and also for the external ip I used http://whatismyipaddress.com/ All of ...
4
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3answers
2k views

Synchronize vmware virtual machine

I have 2 Linux Host VmWare Virtual Machines: one in a desktop and the other in a laptop. They use vmware player. What is the best way to synchronize the Virtual Machines? They are never used in the ...
0
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2answers
100 views

Modifying Virtual Images Offline [closed]

I'm new to this vmware stuff. I was wondering if anyone knows how to modify virtual images offline or know of any tools. I used VM Converter to convert my current desktop to an image. This is for a ...
0
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3answers
1k views

rm command not ask before delete

i have centos VPS created using XEN + OpenVZ virtualization. -bash-3.2# uname -a Linux host.domain.com 2.6.18-274.7.1.el5.028stab095.1xen #1 SMP Mon Oct 24 22:10:04 MSD 2011 i686 i686 i386 GNU/Linux ...
2
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2answers
2k views

Virtual box localhost access

Question on Virtual Box 4.1.8 So, i have Ubuntu 10.10 as host machine and Windows Xp as guest machine. On host machine there is tomcat with web app running on port 8888. When i am in guest machine i ...
2
votes
1answer
89 views

How to restore a certificate from a backup

I have an authenticode certificate living in a backup created with Drive Snapshot, which is a byte level backup of the c: partition from my development machine. I need to export that certificate. I ...
0
votes
3answers
186 views

Is it possible to use a single VM image to run many guests (Windows (Server?))?

Is it possible to use a single VM image to run many guests, where each guest is a Windows Server OS (specifically Windows 2003R2 to begin with, we would evetually migrate to 2008R2 or whatever's up to ...
0
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2answers
519 views

Which hardware to VM ratio for Build-Server virtualization?

After a few comments and answers and thinking, I hope I can now add a TL;DR : If I want full performance(a) and (simple) HW failure redundancy, does it make any sense to go for a virtualization ...
0
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2answers
238 views

Deciding to use VM or native install for new hardware

I have a Ubuntu 10.10 installation running on hardware. I upgraded the hardware, and am planning to move the system over. Whilst reading the many various ways to do this, I came across tools for ...
0
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1answer
218 views

Boot Process In Virtual Machine

I was Learning About the Booting Process...i got the exact procedure for Single and Multiboot Systems which is MBR -> BIOS -> POST -> GRUB -> INIT. I wanted to know what is the exact booting ...
0
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2answers
875 views

Making a hot spare with automatic failover

I currently have a VPS hosted in Charleston, NC. My current provider is offering a deal to purchase an identical (resource wise) VPS in another data center. Although I rarely experience downtime, I ...
2
votes
1answer
648 views

Increasing Virtual Disk in VMWare doesn't show new space is Available in LVM

I have inctreased the size of my virtual HD from 79GB to 100GB on VMWare ESXi 4.1 Virtual Machine http://screencast.com/t/j6Y2SmLES3P7 after that I have restarted VM but when I go to VM ...
2
votes
1answer
483 views

Multiple instances of HTTPD running, and virtual memory constantly running out?

I've noticed my VPS behaving weird today. I have set it up as a web server (along with MySQL, PHP, FTP etc) and at the moment there is only one website running on there. I noticed earlier today that ...
10
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3answers
335 views

Application “not supported” in a VM?

We bought some software from a small'ish company, it's a Windows 32-bit video content workflow manager, there's been some customisation by them. We've been working fine for over a year running this ...
0
votes
1answer
109 views

Why issues occured while i use the same VM image for domain controller and for other machines?

We have hosted an Windows 2008 R2 server image in VMware ESXi and made it as domain controller. We have used the same image for many other machines. When we try to add those machines into domain , we ...
1
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1answer
424 views

Method for sorting VMWareVMs by annotation fields

Background: One of the policies of our vCenter cluster is for (almost) every VM to have an "expiration date". This is a custom field in the annotations panel that is mainly a reminder to contact the ...
1
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2answers
560 views

Windows Server 2008 Hyper-V Server: Guest Windows Server machine imported - only see blinking underscore

I exported 2 virtual PCs from Hyper-V. and then imported them. I can't start one virtual machine that has Windows Server 2008 R2 installed. The machine starts, but then I only see a blinking ...
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1answer
127 views

What free (as in beer) solution should I use on a remote (no console access) server? [closed]

I currently have a 1U server in a data center. I run my (mostly personal) DNS, mail, and webserver on it. It will be time to replace/refresh it soon. When it is time for the new machine I am ...
0
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1answer
9k views

virsh: VM console does not show any output

I have a VM which I can start with virsh. According to virsh dumpxml VM1, this is the allocated pty: <serial type='pty'> <source path='/dev/pts/6'/> <target port='0'/> ...
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votes
1answer
120 views

How to force a Xen VM to run a program

I need to force Xen virtual machine to run a program. Thus, I'm looking for a way to make a script, which could be executed on the host machine and make VM to run the program Also, there's a question ...
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votes
1answer
394 views

VM network suddenly died

I have a VM on VMWare ESXi 4.1, and the network to the VMs has suddenly died, I haven't changed anything.. but suddenly there is no ability to connect to anything beyond on the host (tracert timesout ...
0
votes
2answers
194 views

Host Websites on Virtual IP VMs

I have Proxmox Virtulization server installed. But i have one real(Public) IP. Incoming request to Proxmox server must be bind Virtualized servers. Dnsmasq installed in Proxmox Virtualization Server. ...
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1answer
1k views

Managing qcow2 images with virsh

I have some qcow2 images which I am starting / stopping manually, with kvm, like this: kvm -m 256 -smp 1 -drive file=/var/VMs/qcow2/server1.qcow2 -nographic -net nic,macaddr=52:54:00:11:34:55,vlan=0 ...
0
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2answers
5k views

Dynamic screen resolution in VMWare vSphere Client

I use VMWare vSphere Client to access Windows 7 VM from Windows XP host. In Virtualbox, with guest additions enabled, in Win-Win machines pair, I had by default the dynamic screen resolution ...
1
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1answer
723 views

Adding a second VHD to a Hyper-V VM programatically or from the command line

I have been scripting the creation of my Hyper-V VMs with vbscript successfully for sometime now. All the technician has to do is run my script, select the type of server they are building (EG. a Web ...
5
votes
3answers
1k views

Automating virtual machine creation across multiple hypervisor platforms

Is anyone aware of a tool for automating the creation and deployment of virtual machines across different hypervisor platforms? I work on web applications running on EC2, Xen, KVM, and VMWare, and I'm ...
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votes
2answers
100 views

What steps are necessary in creating a vm on a server and allowing that vm to be accessed from outside the network, or even inside the network?

I have a server hosting a number of guest VMs. The server's VMs are controlled via VSphere. Disregarding all VMs, except for one, brand new, SUSE 10 VM, consider this question: I want to be able to ...
3
votes
1answer
1k views

Getting same IP address for cloned Virtual Images

I was trying to install 3 VM and instead of creating them individually (by using the New VM) I actually cloned them. Now after I start the VM (they are running in the bridge mode) all the VM's are ...
2
votes
2answers
3k views

Virtual machine lost after power cut

We have just had a power issue and our ESX (ESXi 4.1.0) host lost power and then rebooted. All but one of the virtual servers have rebooted with no problem, however one of them refused to power up. I ...
0
votes
2answers
2k views

can't open file with vmware workstation

I have a problem. I had file copy with veeam of my virtual machine on ESXi server, to my local hard disk. I'd like to open it with vmware workstation 8, but I get message: The disk ...
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1answer
4k views

qemu-kvm virtual machine virtio network freeze under load

I'm having a problem with my virtual machines, where the network will freeze under heavy load. I'm using CentOS 6.2 as both host and guest, not using libvirt, just running qemu-kvm directly as ...
2
votes
1answer
261 views

Can DPM 2007 back up virtualized Domain Controllers?

I'm reading this article on caveats and best-practices for running DCs in VMs. It states that the only way to back up a virtualized DC would be to use Windows Server Backup on the guest, due to ...
0
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1answer
971 views

Active directory is not working on VM - Windows Server 2008

I am new to virtual machines. Just installed Oracle virtualbox and trying to run the virtual machine from .vhd file. VM is running fine but my Active Directory is not Operational. Some times it ...
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0answers
284 views

Unable to access CRM 2011, Windows Server 2008 - Server is not operational

I am new to Dynamic CRM 2011 and trying to use it first time (Running on Virtual Machine). I am getting the following error message in web browser. Any ideas to fix the issue? Business Management ...
1
vote
1answer
562 views

installing dkms fails to work

I would like to install dkms to install the VBGuessAdditions but yum install dkms always results in an error loaded pluggins: fastestmirror, refresh-packagekit, security Loading mirror ...