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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How to turn off VMware virtual machines goes to “sleep” if no activity?

I have a couple machines, that have close to no activity for a a longer period of time. And when i try to connect to them with ssh after a week or soo, its like they have gone into "sleep mode", ...
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3answers
4k views

KVM: maximum number of cores and amount of memory for VMs

I have a new 8 core machine with 16GB of RAM. I want to run VMs on it using Ubuntu and KVM. Nothing else but SSH will be running on the host. My question is what is the maximum amount of cores and of ...
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45 views

How do I disable the automatic datetime in an azure virtual machine?

I want to be able to change the date and time on my vm to dates in the past. Every time I change it, it automatically changes back because of this setting. Unfortunately I cannot change it because it ...
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2answers
850 views

Hyper-V 2012 with Server 2003 Guest that requires IPX

Fairly stumped on this one. I've got a Hyper-V 2008R2 server hosting several server VMs. We're looking to migrate to newer hardware and we want to run Hyper-V 2012. I've picked up a Proliant ML350 ...
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1answer
320 views

negative time for a ping echo reply

I was happily pinging in the net when suddenly: Pinging X with 32 bytes of data: Reply from .235: bytes=32 time=1444ms TTL=41 Reply from .235: bytes=32 time=1767ms TTL=41 Reply from .235: bytes=32 ...
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78 views

Three separate VMs for webserver, database, and data crunching. Good idea? [closed]

I'm writing some quantitative marketing research software, and have a bit of a "blind leading blind" situation at work. I'm not really used to writing web apps or configuring servers; most of the ...
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4answers
310 views

Virtualization for efficiency? Doesn't it defeat the point of an OS at all?

This link VMware Virtualization seems to be saying that running a virtual machine and spreading your applications between OS's is more efficient than otherwise. How can this be true? Doesn't a VM ...
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6answers
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64bit VM on Windows 7 x64

Is there any way to run a guest x64 VM on Windows 7 x64? No luck with Virtual PC 2007, Virtual Server 2005R2. (both blocked during install). I know the Windows Virtual PC app that comes with Win 7 ...
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4answers
2k views

How to troubleshoot performance issues of PHP, MySQL and generic I/O

I have a WordPress based website running on a shared hosting. Its response time is very decent (around 2s to retrieve the HTML page and 5s to load all the resources). I was planning to move it to a ...
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5answers
953 views

Virtualbox guest additions security issues

Will installing guest additions post a security risk to a host OS?
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3answers
2k 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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Free Nagios virtual machine [closed]

Where can a I get a quality, free VM of Nagios? http://www.nagios-on-cd.org/ seems to be dead, and the VMware appliance directory only lists JumpBox (good quality, but paid) and several other very ...
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163 views

Upgrade VM hardware

We have a ESXi environment with hosts in 5.0 and 5.1 versions. We would like to upgrade our VM hardware versions (currently in version 4) to the version 8, which is the maximum supported by 5.0. ...
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3answers
3k views

What is the correct way to remediate an HA Cluster?

Background / Goal I have a VMWare HA cluster for production Machines with two hosts. It is currently set up so that it can account for the failure of up to one host. It does not use DRS. I need to ...
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2answers
187 views

if I have root password of Virtual Machine running on a host system , can I control host in any way

Our company gives a VM for each developer which is exclusive for them but doesnt give root access. I am planning to ask for root password so I can install different softwares on the VM. Just want to ...
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3answers
7k views

How to backup VirtualBox virtual server?

I'd like to setup a server running in a VirtualBox virtual machine on a Linux host system. What would be an effective way to backup this virtual server "whole", so that in the event of either a host ...
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6answers
3k views

Planning my first server with Ubuntu KVM Virtual Machines

I am putting together a dual-xeon quad core (i.e., 8 cores total) 12GB RAM linux server to replace several old smaller servers. I would like to use virtualization both to learn about it and because ...
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5answers
15k views

How do I boot a virtual machine image from my network?

I have many machines which require the same configurations. My goal is to boot them all from the network and load a virtual machine. It would be wonderful to have one image for all of our customer ...
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3answers
6k views

VMWare Server 2.0 auto start VM

I have a production server running vmware server 2.0. I want one of the VM's (company intranet) to power on automatically if the host server is rebooted. I searched online and found references to an ...
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2answers
1k views

How to backup ubuntu server and restore on a new computer

I have a dedicated (virtual) server, to which I have only SSH access to. I would like to backup/clone the server to my local virtual machine. I tried to backup with tar all the essential files, but ...
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4answers
3k views

How to distribute a virtual machine to allow users to try out a dependency-heavy program?

I have written a piece of academic software that has many third-party software dependencies (and requires a RDBMS). I would like to create set up a Linux virtual machine image preloaded with all the ...
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2answers
5k views

Hyper-V - Creating a large fixed disk - EXTREMELY Slow

Hey everyone, after posting another question here, it seems I have to create a fixed disk in order to get one 700GB. I have shut down the machine (which basically has nothing on it), and gone to ...
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How to change a VM from split across multiple .vmdk files to a single one or two?

I have a VM with 3 partitions. One main one, one for swap space, one for storage. However, there are dozens of .vmdk files. Some of those .vmdk files are very large (over 1 GB), but the majority ...
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212 views

Windows Server 2012 Hyper-V Rename - SQL DB Issues

I set up a Windows Server 2012 virtual machine exactly the way we want it. I shut down the instance, made a copy of the .vhdx virtual drive, then spun up a new VM and attached the copy of the drive. ...
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9k views

Why are virtual machines on vSphere 5.0 suddenly suspended?

We just got our vSphere 5.0 and vCenter Server 5.0 configuration working with several VMS. These are the vms. Jenkins appliance. vCenter Server Appliance Windows7x64 Windows7x64-1 Windows7x64-2 ...
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2answers
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How do UEFI and virtual machines relate to each other?

I am trying to get my head around UEFI (Unified Extensible Firmware Interface) and it's not entirely clear to me how this affects virtual machines. Thus, there are three parts to this question: Is ...
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4answers
1k views

Virtual (ESXi4) Win 2k8 R2 server hangs when adding role(s)

I'm trying to provision a 2k8r2 Enterprise server in ESXi4. The OS installation goes fine, VMware tools, adding to domain, updates. All the basic stuff before you start adding Roles and Features. ...
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1answer
296 views

How to protect an appliance from unauthorized copy?

At the company I work for, we plan to build an appliance to simplify the deployment of our products. We will probably run a VM with docker containers underneath (containing the products) and a web ...
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3answers
612 views

Allow NTP to update by large amounts automatically?

Here is my scenario: I run multiple VMs on my workstation to simulate the production environment. At the end of the day I sleep my workstation (with my VMs running in the background) at 6PM. When I ...
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3answers
127 views

Virtual Server Memory not a power/multiple of 2

In the old times (before virtualization), memory came in powers/multiples of 2, because that is the way memory is manufactured. Nowadays that we create virtual servers that don't have real physical ...
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2answers
132 views

MS Exchange p2v process

Is that possible to virtualize MS Exchange Server 2007 without stopping it's services? In particular I'm interested in using VMware vCenter Converter Standalone Client for that purpose.
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3answers
3k views

Best Linux distro for load-balancers?

I wanted to try HAProxy/Linux Virtual Server like front-end load-balancers, but as far I know, they're Linux-based software. I don't have any experiences with Linux yet. so there're quite many ...
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Convert my Vista installation into a virtual machine

I am a bit of a newb with virtual machines, so go easy on me. I am currently dual-booting Windows 7 and Windows Vista. I want to convert the Vista installation into a virtual machine, and then remove ...
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2answers
899 views

NTP running, server time is wrong on VM

The server time was 7 hours off (instead of 10AM it was 3AM, even though date showed the correct timezone). The output for ntpq was: $ ntpq -p remote refid st t when poll reach ...
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3answers
3k views

How to control VM traffic on KVM

I have multiple VMs running on a KVM hypervisor. One of the VMs is consuming most of the available bandwidth, making it difficult for other VMs to use. How can I control the bandwidth usage for each ...
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3answers
4k views

How can I run Rackspace images locally?

As the title says, I regularly download my Rackspace images for backup of my VPS, however I'm wondering if it's possible to run them locally on KVM (for example) so I can run tests on my application ...
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1answer
3k views

How to convert VirtualBox VM to OpenStack?

I'm running OpenStack in Ubuntu Server 11.10 (installation did using devstack script), but I have some virtual machines that are already running using VirtualBox. How can I convert the VirtualBox ...
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2answers
1k views

(Eucalyptus, KVM) Why we need to split a VM into kernel image, ramdisk image, and disk image?

I'm new in using cloud computing technologies. There is a popular cloud software called Eucalyptus. I found that the way to start a VM in Eucalyptus is very different from Virtualbox. In Virtualbox, ...
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2answers
548 views

How do I create a team in ESXi Server?

I have three VMware Workstation 7.03 VMs collected in one team that works great on Workstation 7.03. I would like to convert/transfer the team to ESXi (I have a working host) but the VMware Client ...
3
votes
1answer
406 views

Qemu+libvirt+kvm significant performance lag in VM's

I am troubleshooting poor performance on our new VM host machine which is a Dell PowerEdge R415 with hardware RAID. We've got about 20 VM's running like this: qemu-system-x86_64 \ -enable-kvm \ ...
3
votes
1answer
112 views

Using Virtual Machines to Test Driver Deployment

In SCCM 2012, we're currently deploying device drivers during OSD via task seuqnces, using the "Auto Apply Drivers"-step. Our company uses workstations and laptops of several different makes and ...
3
votes
1answer
637 views

Need to move VM to another host with different cpu

I currently have a VM configured with CPU 1 socket & 8 cores per socket. I need to move this VM to another ESXi 5.5 host which has 2 CPU sockets with 6 cores per socket. Will I will able to run ...
3
votes
1answer
2k views

How to move Hyper-V virtual machines to Azure with minimal impact?

My company is in the process of transitioning some of its on-premises services to the Microsoft cloud; some of them are being replaced altogether by hosted services (Exchange, SharePoint); some other ...
3
votes
1answer
65 views

Virtual Server HDD shrinks without apparent reason

We have a virtual hosted Linux server, and in the last few months every now and then the HDD shrinks from 400GB down to the exact byte count that is in use. All existing data can be downloaded and ...
3
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2answers
304 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 ...
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5answers
1k views

How to keep track of vm hosts and guests and IP addresses?

Internally, we have several VM hosts. We are constantly provisioning new guests on these hosts. What tool to you guys use to keep track of what hosts hosts you have out there, the host system stats, ...
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1answer
292 views

Performance of Virtual machines on very low end machines

I am managing a few cheap servers as my user base isn't large enough to get much more powerful servers. I also don't have the money lying around to invest in a server to prepare for the larger user ...
3
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1answer
931 views

Running Debian as guest operating system on a Hyper-V VM

Layer-9 considerations are prompting a migration from Citrix XenServer to Hyper-V as our shop's virtualization platform of choice. This will require me to migrate our existing virtual machines from ...
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3answers
217 views

What's the best way to work out if a virtual server is overloaded?

I have a series of virtual servers. I'm running a command to login to each one and take a look at the load averages using uptime. What's the best way to work out if load values represent overloading? ...
3
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1answer
69 views

Can I run two domain controllers within VMware vCenter on one physical server?

Before I go to the main question, I'll explain the current situation: My current employer uses VMware vCenter to run a fully operational, virtual environment (mostly domain controllers and RDP ...