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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150 views

Should APIC be used on VMs?

I'm provisioning some VMware and Virtualbox VMs, both 32 and 64 bit and all my boot commands start with /install/vmlinuz noapic. Searching for information about APIC etc. around the web doesn't give ...
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1answer
2k 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 ...
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2answers
3k views

Configuring RAID on a VM Host for best performance of multiple Virtual Machines

What is the best way to configure disks in a VMWare server that will be hosting multiple machines? A single RAID 5 array hosting multiple VMs would provide good throughput but means all VMs are ...
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4answers
1k views

Hyper V - Read Only VM

We have a couple of test VMs which we use to test software on. We would like to have a virtual machine revert back to a saved state everytime the VM restarts. I believe virtualbox calls this feature ...
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3answers
969 views

OpenVZ - share files between virtual machines (VEs)?

Is there any way to share a directory of files between virtual machines running in OpenVZ? My particular use case is that I want to have a shared YUM cache directory, for when they all need to run ...
4
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1answer
627 views

Configuration Defaults for VMWare vSphere Virtual Machines

We have a number of hosts running VMWare ESXi 5.5 all attached to a vCenter instance. We access and manage all of our VMs with the vSphere Web Client. A number of people who do not necessarily have ...
4
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1answer
1k views

Potential VMWare 5.1 Fault Tolerance bug/issue?

Background / Setup I've got a fresh install of vCenter Server 5.1 and associated components. I've taken all steps (as far as I can tell) to enable FT, and it worked the first time (yanked a power ...
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1answer
5k views

Virtualization - Linux KVM-QEMU host Windows VM guest, how to access data drive

What is the best way to share a Data partition on a Linux KVM-QEMU host with a Windows VM guest? I could use Samba networking and connect to the drive as a network share but I was hoping there might ...
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2answers
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How to manage changes to set of cloned Virtual Machines?

I am trying to set up a workable model for development. I'm wondering if anyone has recommendations for Virtual machine software and what process to follow to enable the following: Developers grab ...
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3answers
2k views

VMware CPU Hyper Threading Scheduling Affinity

I have looked everyware and read a bunch of documentation on this but haven't found a direct answer so here it goes: There is a setting in the "Resources" Tab in vCenter that lets you configure Hyper-...
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2answers
4k views

How to edit/add file in VMDK

I have a VMDK (with several partitions) file which I need to modify. It is not attached to any particular virtual machine. I've tried using vmware-mount (from the VDDK toolset) in on Ubuntu server 12....
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1answer
692 views

Provide Internet connection to Virtual Machines on Hyper-V

Our Office LAN - 192.168.1.1/24 Gateway - 192.168.1.5 (A Microsoft ISA 2006 Server) DNS - 192.168.1.4 (DC) We are having Hyper-V server running and there are several Virtual Machines on that server. ...
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1answer
6k views

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", ...
4
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1answer
55 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
934 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 ...
4
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1answer
355 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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0answers
83 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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1answer
1k views

Most VMS refuse to start

Setup: Virtual Host, running server 2012, hosting around 10 production VMs Problem: Last night, 2 VMs stopped with no warning, event log notification, or any information. The rest of the VMs on this ...
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4answers
311 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
1k views

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 ...
3
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1answer
13k views

Why Are There Only 65,535 Ports, and Will We Ever Have More? [closed]

I understand the original reasoning behind having 65,535 ports per IP address: this is the highest number that can be represented by a 16-bit, or 2-byte, number, and it wasn't conceivable that ...
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4answers
3k 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
983 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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3answers
21k views

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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2answers
175 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 ...
3
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2answers
190 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
8k 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 ...
3
votes
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
11k views

VMplayer Virtual Disk Shrinking/Compacting/Defragmenting

I am using VMplayer on Windows 7 and 2008 R2. Inside the guest OS, in VMware tools, there is a "Prepare to shrink" option on the "Shrink" tab. In the host VMplayer menu there is "Defragment" and ...
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2answers
2k 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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votes
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 ...
3
votes
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 ...
3
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1answer
21k views

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 ...
3
votes
1answer
219 views

How to upgrade multiple virtual machine operating system in VMware vSphere in a data center?

In our data center we have 4 physical server having ESXi 5.5 installed on them. On each physical server there are multiple virtual machines running on them and all of these virtual machines are ...
3
votes
2answers
2k views

How do you set an availability set for an existing VM in azure?

I am using the new Resource Manager type of virtual machine. Now I need to add this into a load balancer (already configured) but I can't find how to assign this VM into the Availability Set so I ...
3
votes
3answers
7k views

Can I add a second network adapter to my Azure VM?

I have Multiple VM's on Windows Azure. Default, they come with 1 network adapter and you can only assign 1 virtual network (Availability Set) My question is : possible to connect 1 VM to more then 1 ...
3
votes
1answer
228 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. ...
3
votes
1answer
10k 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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votes
2answers
2k views

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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votes
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. I'...
3
votes
1answer
422 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 ...
3
votes
3answers
678 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
24k views

Unable to ping between host machines and guest vms running on Vmware

In order to learn a bit about system administration, I've installed a Centos vm using Vmware on my local machine running Windows 7. Everything seems to be working fine since I can access the internet ...
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3answers
142 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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votes
2answers
134 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 ...
3
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5answers
8k views

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 ...