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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1answer
3k views

Connecting to SQL server instance on VM via host-only network

I've setup a virtual development machine with Windows Web Server 2008 R2 and installed SQL Server 2008 R2 Express on it as well. I didn't install any SQL tools on it, because I have them on the host ...
1
vote
4answers
65 views

Bare metal hyper-visor that supports viewing it's own guests

I'm trying to understand if it is possible to have a Type-1 Hypervisor (bare metal, no host OS) with the ability to view the guest(s) operating system(s) on the same machine. i.e. I have a XenServer ...
1
vote
1answer
27 views

How to virtualize a dedicated server [on hold]

I have a dedicated server with the following configuration : CPU : AMD Opteron 4386 Cores/threads : 8c/8t Fréquence/burst : 3,1 GHz+/3,5 GHz+ RAM : 64 Go DDR3 ECC 1066MHz ...
1
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0answers
27 views

How to assign dedicated vCPUs to specific VM on Proxmox (KVM) or what system could do that?

I'm posting this here, because what I've found about the topic is either outdated, incomplete or not suitable for various reasons. I have wanted for a long time to learn how to map specific vCPUs to ...
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votes
0answers
15 views

Increase and decrease size of a virtual disk dynamically [on hold]

Basically I have a server with hot plug. What I want is: create a virtual disk that can be accessed online (like Dropbox), and the virtual disk will increase its size according to the user ...
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0answers
24 views

How manage developer server on linux? [on hold]

I want to have such things on my server: 1)Web app1 (redmine - ruby) 2)Web app2 (buildbot - python) 3)C++ compilation env for our project (fixed version of gcc and libraries) 4)some proxy for web, to ...
0
votes
0answers
21 views

Filtering KVM guests with IPtables

My partner has a server with OVH that receives a constant variety of ddos attacks, while still staying up. We want to use IPtables on the host to filter the guests VM's traffic. The guest VM we want ...
0
votes
1answer
43 views

What it means when Linux has no I/O scheduler

I have some virtual machines running Ubuntu cloud-based image 14.04-1 LTS version. I wanted to see the IO performance of different IO schedulers on the VM so I went to ...
2
votes
2answers
941 views

Xen Remus setup

Currently, I'm running the IT for a small organization, and we just purchased a new server to replace our aging Dell poweredge. As the Dell isn't so bad as to be junk, I was hoping to set up Xen on ...
2
votes
1answer
27 views

How much of a performance does using QEMU virtualization incur on Windows?

How much of a performance does using QEMU virtualization incur on a Windows host, when both the host and vm are running the same CPU? Older articles indicate that using kqemu avoided the slow down in ...
0
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0answers
47 views

(KVM) virt-manager stuck in password prompt after open VM

so i installed a fresh ubuntu server 14.04 with KVM, i'm connecting with my other ubuntu machine using virt-manager. so after i had permissions problem creating a new VM, i uncomment user="root" and ...
0
votes
3answers
65 views

Version control for virtual disk images

Is there any existing system for efficiently tracking the version history of a virtual disk image? Essentially, I have a disk image which is used as a "template" root filesystem for testing programs. ...
0
votes
1answer
931 views

lighttpd virtual hosting configuration

I need help setting up virtual hosting in lighttpd. i have the lighttpd default webpage in /var/www/lighttpd dir and i have created other dirs for my other websites /var/www/web1.com/public_html and ...
1
vote
1answer
277 views

Apache log to one file for multiple domains with logrotate

I would like a solution to my problem where I have 100s of domains on an Apache server. I don't want a separate log file for each domain I want them to share a log file. This is easy enough if I don't ...
0
votes
1answer
35 views

What hypervisors support vGPU? [on hold]

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 ...
2
votes
1answer
83 views

Modify VM in OVA

I have an OVA that contains a vApp with 9 VMs inside. I need to make a change to the drive contents of one of the VMs in the OVA. The OVA takes a very long time to export from vSphere (24 hours). Is ...
0
votes
1answer
33 views

ubuntu kvm disk io slowdown after some tyme

Host system: Ubuntu Server x64 12.04 mdadm raid 1 (/dev/sda /dev/sdb) no lvm dd bs=1M count=256 if=/dev/zero of=filename conv=fdatasync avarage ~ 40 MB/s NCQ on disks is disabled WriteCache is ...
0
votes
2answers
616 views

Change KVM boot order with multiple virtio disks in guest

I just started playing with KVM, so learning quite a bit here. I have a guest running, finally got the OS setup the way I want with Virtio SCSI and Net drivers (Win2k3) and am very happy with ...
0
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2answers
4k views

Is there a tool to browse a VMWare VMFS datastore hard drive on a PC?

I would like my VMWare ESXi 5 server to have a USB-attached HDD datastore which I'd be able to detach, attach to my laptop and browse files on it. As far as I understand, the hard drive is to be ...
0
votes
1answer
1k views

setting CPU cache size and model for KVM guest

Is there any possibility to create a custom CPU model for KVM Linux guests, or at least to modify parameters such as cache size and model name? I know I can set CPU features, topology and pinning and ...
0
votes
1answer
897 views

Debian Jessie Qemu KVM GPU Passthrough to Windows Virtual Machine guest Virt-Manager error Bus PCI not found

I'm having problems with Virt-Manager not wanting to boot a VM and giving error: Error starting domain: internal error: process exited while connecting to monitor: char device redirected to ...
0
votes
2answers
941 views

Getting “Stopped” Hyper-V VM state from PowerShell

I'm using http://pshyperv.codeplex.com/ for managing Hyper-V through PowerShell. OS: Windows Server 2012 This PS module can get VMs which are running and, I guess, should get the ones which are in a ...
2
votes
1answer
34 views

Install RSAT-Hyper-V-tools fails on Windows Server 2012 R2 Server Core

When I try to install Rsat-Hyper-v-tools with powershell command: add-windowsfeature rsat-hyper-v-tools -includeAllSubFeature It fails with error saying that: The source files could not be ...
2
votes
1answer
883 views

virt-install kept on adding --no-reboot - even though I don't want it to

I have a bit of a problem getting my guests to reboot after the OS installation using virt-install. For whatever reason, virt-install insists on inserting "--no-reboot" when you create a VM: ...
0
votes
0answers
27 views

Load too high in Virtual Machine [closed]

I have a problem with a virtual machine are configured in the same way, are asterisk switches that receive the same number of calls, and for some reason the load Constantly rising to reach 14.0 and ...
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votes
1answer
27 views

Xen hypervisor component/plugin development [closed]

I am new to virtualization as a concept, and am particularly interested in Xen. A machine is a complex system composed of many parts/constituents: CPUs (one or more) RAM Hard drive Network card ...
1
vote
1answer
1k views

DCOM Authentication Fails to use Kerberos, Falls back to NTLM

I have a webservice that is written in Classic ASP. In this web service it attempts to create a VirtualServer.Application object on another server via DCOM. This fails with Permission Denied. However ...
0
votes
0answers
9 views

Connection refused for port 80 in VirtualBox. But only for CentOS VM [closed]

after having this issue this morning I have done A LOT of reading of other questions. So hopefully I can provide plenty of info to assist in solving this I can SSH using standard port 22 to the VM ...
21
votes
12answers
51k views

How do I know if I'm working on a Virtual Machine or not?

Is there a way to know if the Windows machine I'm working on is virtual or physical? (I'm connecting with RDP to the machine. If it's a virtual machine it is working and handled by VMWare).
0
votes
1answer
32 views

Juniper SRX210 routing vlans

Ive got a Juniper SRX210 only using 2 ports Model: srx210he-poe JUNOS Software Release [11.4R2.14] WAN ge-0/0/0 up up ge-0/0/0.0 up up inet ...
3
votes
1answer
389 views

GPU support on OpenStack/CloudStack

I'm wondering if anyone here has had success with any of the cloud orchestration layers using a GPU (preferably vGPU)? I've been able to get XenServer 6.2 to successfully see our nvidia GRID K1 card ...
0
votes
0answers
13 views

Docker: display information for each pulled layer

Whenever I pull an image from a registry, Docker pulls not only the image, but also additional layers. Is there a way to tell docker to be more verbose about the layers? E.g., if I $ docker pull ...
2
votes
0answers
18 views

Ensure docker pulls most current image

Assuming I have registered a repo at Docker Hub, called MyRepo. Assuming I am working on a Docker image called MyImage. Assuming I have configured Docker Hub to build images from Dockerfiles ...
4
votes
1answer
31 views

Count number of allowed CPUs in a Docker container

My specific scenario is the following. I launch a docker container with a specific cpuset: docker run --cpuset-cpus="0-2" # ... inside that container I run a shell script as the entry point and ...
1
vote
2answers
955 views

VMWare and Turnkey Linux appliance can't access network

I have a VMWare ESXi cluster running many Windows and Linux VMs perfectly. I have installed the Turnkey Linux Redmine appliance, and am having a lot of trouble getting the networking to work ...
0
votes
4answers
8k views

VMWare 6.5 virtual machine fails to resume after suspend

I am having a problem to resume a VMWare virtual machine from the suspend mode. It presents me a dialog stating an error in some source file and suggesting to send the dump to VMWare support. G*ing on ...
1
vote
1answer
47 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 ...
0
votes
2answers
1k views

How to speed up QEMU on Windows host?

We want to run our Ubuntu 64bit web server virtualized/emulated on a Windows 64bit host. Intended use is to distribute the VM to customers who might not have "elevated" or "admin" rights on the ...
1
vote
0answers
28 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
votes
1answer
18 views

Can I run multiple Linux instances within a RHEV-M VM?

My overlords have allocated me one VM and externally-routable IP for use on a certain project, and I've since discovered that the software that runs on this is essentially a singleton (no more than 1 ...
0
votes
1answer
33 views

Recover an oVirt Hosted Engine Crash

I have an oVirt setup, and recently yum updated all packages in hosts and hosted engine. Problem is I can't start the hosted engine. After a while if you issue the command: hosted-engine --vm-status ...
1
vote
1answer
36 views

Multi IPs on a Xen VM with bridging

While I am fairly new to XEN (running under Ubuntu 14.04) I've not had any real issues until now. I have set my networking using bridging and that has worked well for many different machines until ...
15
votes
2answers
1k views

Is running permanently in a VMWare snapshot bad for performance?

I understand that the VMWare KB frowns upon long running snapshots mainly due to two things (In my opinion) Taking tons of snapshots can fill up the data store. Snapshots are simply delta files. ...
-2
votes
2answers
39 views

How do bare-metal/hosted hypervisors relate with hardware and software virtualization? [closed]

Do I understand it properly that Hardware Virtualization is basically a system with a bare-metal hypervisor and Software Virtualization is a system with hosted hypervisor? (And, therefore, because ...
1
vote
1answer
828 views

How to prevent nginx from locking files on mounted samba partition in Centos 6

I'm using nginx 1.3.8 inside a centos 6.3 virtualbox 4.2.4 virtual machine. The system is running the latest software available via yum update. The host OS is windows 7. The site files nginx is ...
1
vote
1answer
398 views

Promiscuous mode in KVM

I have cloud system based on Openstack Icehouse-version. Now I want to test newer version of Openstack (Juno) inside my existing cloud. All hosts and guests use Ubuntu 14.04 as their OS. KVM is ...
-1
votes
2answers
58 views

How to run a single-threaded application on multiple processor cores efficiently? [closed]

There is this old application that we are using (called Aldfaer) that only uses a single thread. One of its processes takes about 90 minutes to complete at this moment, and we would like to decrease ...
0
votes
0answers
16 views

Effective ways of testing out Hyper-V server 2012 performance?

I am planning to install Hyper-V 2012 server on my physical machine. I would like to see how well it performs (if it's possible). I have 2 identical physical servers on which I will install Hyper-V ...
2
votes
0answers
19 views

Image build system that derives from a base Windows 8.1 image

For our VDI deployment, we have several Windows 8.1 images for target groups that require different suites of applications. The current update procedure requires us to update the OS on each ...
3
votes
1answer
916 views

How to get virtualized SR-IOV Infiniband interface UP?

I've spent several days on this now and I've managed to get SR-IOV working with the Mellanox Infiniband card using the latest firmware. The Virtual Functions appear in Dom0 as 06:00.1 Network ...