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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Switching back to libxl from xend without rebooting

I did something dumb: I enabled xend over libxl and started an instance with xend. Now, libxl won't start any instances, even though I got rid of all the xend instances and stopped xend: root@xen1 ...
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0answers
4 views

Trying To Run a VM On Ubuntu 14.04 LTS [migrated]

I cant seem to run a VM on Ubuntu 14.04 LTS, virtual box is reporting "Failed to load VMMR0.r0 (VERR_SUPLIB_WORLD_WRITEABLE)." I have tried all the fixes I could see on the bug reporting page of ...
1
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0answers
9 views

Setting up cluster with vagrant [migrated]

I want to create a cluster of 4 CentOS VMs using Vagrant. I installed Vagrant and VirtualBox on my Widnows machine, downloaded the CentOS 64 box and created the cluster. Steps: Execute 'vagrant box ...
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1answer
15 views

Virtual networking, can ping and traceroute, can't apt-get update

I'm building a virtual network with 6 virtual machines in virtualBox. One of them acts as router/nat/firewall. This first machine uses 4 network cards: eth0 -> Internet eth1 -> Subnet 1 eth2 ...
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0answers
10 views

PING icmp open socket: Operation not permitted in vserver

I am running a vserver environment with several virtual machines. A single VM has the following problem: $ ping 8.8.8.8 ping: icmp open socket: Operation not permitted $ ls -l $(which ping) ...
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0answers
5 views

OpenSUSE Xen Multiple Apache VM's

I am attempting to set up an OpenSUSE 13.2 server with Xen Hypervisor installed. The problem I have now encountered, is how do I route the correct requests to the correct VM instances. Lets say I ...
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1answer
12 views

Var folder maxing out /dev/mapper/vg00-var

Over the past few years we have had multiple linux servers have the same problem time and time again, our /dev/mapper/vg00-var folder max out at 100%. which means all sites on the server die. We have ...
2
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1answer
50 views

Do I need to use Sysprep to clone VMs on my personal lab? [on hold]

I’m a programmer and I’m trying to build up my personal Lab. I have a machine with Hyper-V Standalone Server 2012 R2 installed. I need to create VMs which will be used for testing applications, ...
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1answer
17 views

How to configure VM IPs on VMWare ESX Host

I have rented a server from So You Start that runs VMware ESX 6.0 on it. I have bought IPs to use them in my VMs bu t the problem is i cannot make them run VMs. I did exactly what this guide says for ...
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2answers
30 views

Setup Azure VM - Connect to internet

I'm basically a total novice in the area of VPN's and DNS servers. I have an Azure VM which I have created and I need to connect it to the internet, and googling sends me to pages where peoples ...
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0answers
13 views

ERROR: OpenSSL::PKey::RSAError: data is too large for key size", when trying to upload cookbook 'learn_chef_iis'

I am receiving the following error message: "ERROR: OpenSSL::PKey::RSAError: data is too large for key size", when trying to upload cookbook 'learn_chef_iis'. I was following a CHEF tutorial and now I ...
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0answers
21 views

Which image format is used by Openstack Cloud Patform? [on hold]

I'm working on machine image portability between eucalyptus and openstack private cloud platforms. I have and ubuntu.img (raw image). To make it work on both eucalyptus and openstack cloud which ...
0
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1answer
29 views

Forward domain to website hosted on Azure server with a non 80 port

I have an Azure Ubuntu VM server with multiple websites. Say website A = 81, website B = 82. These endpoints are exposed and I can access the website externally using <ip address>:<port>. I ...
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0answers
12 views

LTSP Thin client “Fatal! Could not read from the boot medium”

I have searched among the already asked questions but none of them seems to work for me. I am currently running VirtualBox on my Windows-7 host PC (64-bit OS, i5-2400 CPU, 6 GB RAM). I have a ...
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0answers
3 views

Virt-manager guest hangs, when host system sleeps and then wakes-up [migrated]

I run virtual machine manager - v0.9.5 on ubuntu 14.04 (host) and there is Centos 7 up and running as a guest. The host machine goes to sleep (when i close the laptop lid) and then wakes up. On ...
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1answer
31 views

Backup kvm Virtual Machine with lvm

I'm new to virtualization and have been searching for a while for a flexible disk format for setting up a kvm VM, after some reading i decided to go with lvm. And did set up the disk and the ...
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0answers
21 views

Failed to create OpenNebula VM

I'm trying to instantiate a virtual machine from the OpenNebula sunstone. The frontend is a CentOS machine with the sandbox installed. The two hosts are ubuntu 12.04 32 bits machines, and they can all ...
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0answers
54 views

DNS problems with a static IP configuration in a VM [migrated]

I am using Parallels Desktop 10.2 for Mac on OS X Yosemite. I am trying to configure my my client (Ubuntu 14.04) to host a website that is available to the host via a particular domain name. In the ...
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1answer
56 views

Multiple DSLs connected to single HP server

networking noob here! Got a pretty specific question. Is it possible to plug 10 cat5 (network) cables that come from 10 different DSL modems to an HP server so I have 10 different broadband lines ...
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2answers
27 views

Creating Virtual Proxy Server

I know this is not this kind of forum, but I can't find anything in google that really answers my question. Is there possible to create a Proxy server running in a Virtual Machine using only 1 ...
0
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1answer
44 views

What hypervisors support vGPU? [closed]

Does anyone know if any open source hypervisor supports vGPUs? It looks like XenServer and vSphere are the only two hypervisors that support virtual graphics cards (true vGPU, not passthrough or ...
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1answer
55 views

Creating new Virtual Machine in Microsoft Hyper-V server 2012 r2

I am new to Windows Hyper-V server 2012 r2, trying to create new virtual machine in ther Hyper-V server. Try to follow ...
1
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1answer
42 views

How was DC restored in windows 2008 before windows 2012 VM generation ID?

Windows server 2012 got this new thing called "VM generation ID" which protects DC restoration from snapshots so it doesn't impair the system (getting new invocation ID and requesting new RID pool ...
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1answer
18 views

pfsense with 4 WAN IP and outgoing NAT

I have a pfsense with a single wan ip, i want to assign multiple wan ip's. The pfsense machine is located on a vm machine with the other servers i wish to NAT forward. I want to give each server a wan ...
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2answers
60 views

Is the MAC address of the physical host used in a virtual environment?

In an environment with virtual servers, is the MAC address used to communicate, the MAC address of the physical host, or the MAC address of the virtual adapters. If it's is the virtual MAC address how ...
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3answers
46 views

What's the advisable maximum CPU usage?

I have a VM with 8 core of processing, and occasionally the CPU usage is going to around 75 ~ 100%. I read in some places, that when the CPU usage is with more than 75% is it a trouble, and can ...
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1answer
18 views

How to use Server2012 as DHCP and on the same time Ubuntu Server as Gateway for the client Machines? [closed]

I want to use Windows Server 2012 R2 as a DHCP for the client computers with Ubuntu server acting as gateway to the internet. I am using VMWare WorkStation. Both machines are installed on it. Windows ...
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2answers
102 views

Hot-remove memory in a Linux virtual machine

Linux supports hot-adding memory when running as a VM guest, in VMware for example. (Sometimes you need to manually inform the guest OS.) Is there a safe way to do the inverse operation — reducing ...
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0answers
24 views

Windows 7 Pro 64-bit Standard User Default Profile: Local Group Policy or Sysprep?

I have a Windows 7 Pro 64-bit machine that will be hosting three Windows 7 Pro 64-bit VMware Player 7 virtual machines. I have the first VM completed and am about to create the first standard user on ...
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0answers
29 views

Azure VM - HTTP GET to Rackspace server is too slow [closed]

I'm testing a web service from my Azure VM and the test involves just doing an HTTP GET which returns JSON data from a Rackspace-hosted server. When performing this test from ANYWHERE but Azure, the ...
0
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0answers
48 views

Hyper-V windows server 2012 - Download speed not more than 10KBps from Virtual Machines

I have installed HYPER-V rule on my windows server 2012. Hyper-V created one virtual adaptor and it is linked to the physical adaptor (only one physical adaptor is there) I used powershell to enable ...
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1answer
57 views

Hyper-V VM very slow after live migrating to very similar hardware.

I live migrated Windows 2012 R2 Vose from Windows 2012 R2 server to another Windows 2012 R2 server running hyper-v. After the migrate this migrated Vose is running very poorly and uses lot of virtual ...
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1answer
25 views

Manage Hyper-V VMs remotely without RDP

After searching a lot I couldn't find this anywhere so I'm asking here, I'm sorry if this was asked before. Is there anyway to manage Hyper-V VMs remotely without having to connect to the Windows ...
3
votes
1answer
53 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 ...
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0answers
42 views

Azure Virtual Machine outbound HTTP timeout

I've created a simple webapplication running on an azure virtual machine. The application is also displaying data from another website (http, 80), hosted outside of the azure cloud but also under my ...
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0answers
7 views

VMWare Tools: Share and Access Host (Windows) Folders [migrated]

Probably the best environment for web applications development I have found is by using a virtual machine(Linux Ubuntu) within my host OS(Windows). This way, I can take benefit of Windows based ...
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0answers
7 views

Accessing JSON Server Hosted on a Virtual Machine [migrated]

I have set up a Linux Virtual Machine on my Mac (Kubuntu 14.04). On it I am running a JSON server using a Python script that is hosting it at localhost:8080. Is there a way I can access this from the ...
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1answer
31 views

Multihomed VM workgroup attached to domain clients, resolution issues

hopefully someone here can help me out with this nightmare: I have a corporate network with ADDS, let's make believe this is a 192.168.10.x network. I have a server that runs 3 VMs (one APP server, ...
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1answer
60 views

Is there anyway to do ssh on a VM with a local IP address?

Scenario :I am using KVM as a hypervisor and Ubuntu as guest and host OS. There are many VMs on a PM and I am assigning IP addresses to those VMs using NAT. To create VMs I am using a baseimage. So ...
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0answers
11 views

Separate bridge for each VM?

I have been experimenting with network settings ever since I got a new dedicated server for some root-started unprivileged LXC containers a few months back and have finally arrived at what might be a ...
56
votes
3answers
5k views

Is a VM with 2 CPUs really faster than one with 4 CPUs?

Our IT created a VM with 2 CPUs allocated rather than the 4 I requested. Their reason is that the VM performs better with 2 CPUs rather than 4 (according to them). The rationale is that the VM ...
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0answers
52 views

Hyper-V 2012 R2 creates multiple vEthernet adapters

on our Windows 2012 R2 Hyper-V Free server, which will host the VM now running on an ESXi, I messed up launching twice the Add-VMNetworkAdapter cmdlet. These are the steps I took: create a ...
3
votes
2answers
235 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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votes
1answer
43 views

Server 2012 domain controller vm and physical hosts [closed]

I want to try out Server 2012 that is a domain controller running as VM on virtualbox or Hyper V running inside Windows 7. Can I still connect physical hosts to the domain controller AS well as vm ...
1
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1answer
59 views

CentOS Qemu+KVM lot of virtual machine processes

I am on host-machine with Centos 6.5, qemu+KVM and 2 virtual hosts in it (behind NAT). Both virtual hosts were configured with Virtual Machine Manager (one of them is with Windows 2003 and other with ...
1
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2answers
50 views

Connecting a LAN drive to Windows 2008 / 2012 VM instance on Google / AWS / Azure

Scenario: Our office uses a Sage software on multiple workstations. The software is individually installed on each workstations, but the database is stored on a server tower that has shared access to ...
4
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3answers
103 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 ...
0
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1answer
33 views

Should I deploy hadoop on physical machines or virtual machines?

We will deploy a hadoop cluster on hundreds(say 300) of physical x86 nodes. Since we have no much production deployment experience, there is a simple question as the title we want to hear response ...
1
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0answers
42 views

Effect of firewall on virtual machine [closed]

We have a ubuntu-12.04 host machine that has another ubuntu-12.04 guest machine running in it. The network interface between the two is bridged. I would like to put the host machine behind a firewall, ...
1
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0answers
47 views

Checking if two virtual machines are running on the same host

Is there a way to see if several Virtual Machines are running on the same host? Specifically, I have three VMWare VMs (each running a Ubuntu Server 14.04) and I have tried to compare different pieces ...