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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How to measure boot time of a VM from host machine?

On both Guest machine and host machine, I am using Ubuntu 12.04. As a hypervisor I am using KVM. I want to perform some experiments related to boot-storm and I have created all other scripts to ...
4
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2answers
342 views

How do I make all Xen guests use their host clock value?

I've set up Xen server under Linux with several guests running, and all was well. After some time I've noticed the clock on the server drifted away, so I installed 'ntpd', and the clock was back to ...
0
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1answer
793 views

Dell 12G R720 Hyper-V host virtual/physical NIC stops working

On the host 1 physical adapter is plugged into our network, on host itself I have Hyper-V role. I have created a external switch and binded it to the physical Broadcom NetXtreme Gigabit Ethernet, box ...
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1answer
2k views

Cannot connect to Openstack Instance via horizon, but SSH works?

I've got an OpenStack deployment running inside a VM for testing purposes. My setup is as follows: Host Ubuntu x64 with Virtualbox -> Guest Ubuntu x64 with OpenStack -> Ubuntu X64 Server Test ...
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0answers
15 views

No connectivity between azure VMs

In my azure environment, I have 4 VMsx running Windows Server 2012 R2 10.0.0.4 (AD, DNS) 10.0.0.5 (ADFS) 10.0.0.6 (MSSQLSERVER) 10.0.0.7 (IIS) All of the machines are connected by an azure virtual ...
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2answers
28 views

Multiple IP addresses on host and one on kvm

I've recently configured my network using advice from this question but now I need to configure this a little different. I'm using Debian distribution. I have one dedicated server with 3 IP addresses ...
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1answer
38 views

Ubuntu Subdomains on the Fly

We're a trying to accomplish the following on a Ubuntu Server 13.04 installation. We host SaaS apps for customers are are currently moving off shared hosting environments due to limitations with ...
3
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1answer
108 views

Can vSphere PowerCLI cmdlets execute from a PS1 file?

I'm looking to write an admin script that will: Delete a VM from vSphere Delete the VM's DNS entry Release the VM's IP address with our Windows DHCP server I can accomplish the first item via ...
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1answer
1k views

OpenVZ Can't initialize containers after install

I have installed OpenVZ on centos 6 on a dedicated server. I followed quick installation guide on openvz wiki. After installing thru yum, I don't know why, but grub.conf wasn't automatically updated ...
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0answers
11 views

ISCSI drives suddenly lost partitions

We have a VM host, and each VM is given an ISCSI volume to boot off of. These ISCSI volumes are stored on a second server. Today, we had to reboot the VM host because ISCSI hosts kept going into ...
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3answers
4k views

use LXC under heavier virtualization (Xen, KVM,Hyper-V,VMVare)

Is it possible to use LXC under heavier virtualization (Xen DomU, KVM, Hyper-V, VMVare) ? I would like to use it as security (isolation) tool, the ability to limit resource consumption is not priority ...
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3answers
1k views

How much contention is too much in VMware?

For a while now I've been trying to figure out why quite a few of our business-critical systems are getting reports of "slowness" ranging from mild to extreme. I've recently turned my eye to the ...
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2answers
828 views

How to share Internet connection with Ubuntu Virtual Machine?

I have Windows Server 2008 R2 as host and Installed Ubuntu 11.04 as Virtual Machine using Virtual Box. My proxy is configured using URL. I tried configuring in the networking settings and also with ...
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1answer
1k views

XenCenter cannot connect to XenServer

I am trying to establish a connection using XenCenter 6.0 to a server where XenServer 6.0 is installed, but it gives me the following error message: Unable to connect to server '192.xxx.xxx.xxx'. ...
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5answers
668 views

Can I send clients a pre-configured Virtual Machine?

I am not very well acquainted with VM Ware and Virtualization but I am investigating the feasibility of creating a VM Instance using VMWare, Windows Server 2008 R2, and shipping that VM as a complete ...
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0answers
41 views

Xen memory management

In real machine, I can reserve a certain of memory by editing grub to limit memory,which the machine can use, and then mapping the reserved memory using ioreamp. I can manage these memory and insert ...
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0answers
28 views

How are the 16 cores of an Azure A9 VM instance implemented? [closed]

I want to know if the A9 VM instances map to 16 physical cores. According to their (Microsoft Azure) specification, both the A8 and the A9 use the Intel® Xeon® E5-2670 processor with the ...
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6answers
559 views

Build two servers or buy one from manufacturer?

I'm replacing three 7 year old servers with one new one. We are a small k-12 independent school, running AD, exchange, a database, and 3 3rd party apps. From my research it looks like I can build 2 ...
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1answer
998 views

Error while creating VM using virt-manager on Xen

After a great struggle I got my XEN installed now I am using virt-manager and trying to create a VM. Since my H/W doesnt support full Virtualization using the Para Virtualization installation over ...
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1answer
19 views

Virtual PC/Server software intalled on SBS 2011 Essentials that hosts other Windows OS?

I'd like to know if anyone else has successfully installed Oracle Virtual Box, VMware Workstation, or Virtual PC 2007 software on SBS 2011 Essentials that hosts other Windows OS without causing any ...
0
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1answer
2k views

How do I tunnel an HTTPS proxy through a virtual machine (VMWare)

I have a personal setup at home using VMWare Workstation. I also have a set of Virtual Private Machines that run Squid, and therefore provide me HTTPS proxy tunnels. Using Proxifier, I can tunnel all ...
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1answer
713 views

How to edit or create roles in Proxmox VE?

How can I create Roles or edit them with specific privileges in Proxmox VE ?
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1answer
1k views

tap interfaces always disabled in linux bridge

I have a physical interface eth0, and I want to create two virtual interfaces and bridge them with eth0. For this purpose I do: #Create the virtual interfaces tunctl -t tap0 tunctl -t tap1 ifconfig ...
1
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1answer
73 views

IBM BladeCenter H networking

I'm new to the IBM BladeCenter H, and I'm trying to figure out the networking side of it. I've installed a windows server OS on one of the blades, and am trying to fiddle with it's network setup ...
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1answer
70 views

Pfsense edge firewall .. DMZ … pfsense internal firewall + squid

i want to setup Pfsense on edge .. DMZ .. Internal PFSENSE with squid + squid Guard + lighttp for reporting... Internal Network. edge firewall will have 2 wans on loadbalancing & failover. ...
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11answers
33k views

VMware Linux Server — how can you tell if you are a vm or real hardware?

An interesting question. I have logged into a Linux (most likely SuSE) host. Is there some way that I can tell programmatically that I am a VM host or not? Also assume that the vmtools are not ...
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1answer
21 views

Two IP addresses one network interface and virtualization

I have a Debian [H] host server with one network interface, configured like this (/etc/network/interfaces): auto lo iface lo inet loopback auto eth0 iface eth0 inet static address xxx.yyy.zzz.77 ...
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2answers
538 views

How do I give label to vSwitches on VMWare?

I've searched extensively trying to name the vSwitches that I create, but all I can name them are "vSwitchX" where x= some number. How do I give these switches names? I'm using the Web Client. ...
16
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5answers
3k views

Best Practices for virtualizing servers onto the SAN?

Alright, so I want to start leveraging my SAN a little more than I have been, and at the same time, take advantage of ESXi. Currently, I've got an array of Dell PowerEdge 1955 blades connected to a ...
3
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1answer
108 views

What does the MAC setting on an interface do to the ability to transmit frames?

I'm told that an interface can transmit a frame no matter what the OS has set for the interface's MAC. I'm also under the impression this is how VMs do host-bridging. If that is so, then what uses the ...
1
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3answers
138 views

Xen PV, Xen HVM and KVM

Am I correct that you can boot up any operating system with either of these virtualization types as they act as a bare metal machine and compile your own kernel? I am looking to switch over from ...
0
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1answer
30 views

Manage oVirt environment

I'm starting to deploy oVirt in one of my works, and I have a lot of questions about how to manage everything when you start using it. First I'll describe my setup. I have three machines, two ...
0
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1answer
890 views

How can I change Qemu KVM machine architecture from 440fx to q35 with virsh edit or virt-manager

Still trying to get GPU passthrough working and decided to change machine type from older 440fx to q35 ie pc-q35 but if I do virsh edit on the config it refuse to save saying "PCI Bridges not ...
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3answers
1k views

XenServer HA (failover VM's) without shared storage

In the university from Uruguay where I work, we have 2 IBM BladeCenter S with 4 server blades each one. Each blade have XenServer 6.2 installed and working. Our idea is have each BladeCenter in ...
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1answer
35 views

HyperV External Switch Multiple VMs

I'm quite new to hyperv and I am having problems setting up network access for my VMs. The host has two physical network ports and I've assigned one to an external virtual switch. I've then setup two ...
0
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2answers
3k views

Bind nic to VM on VMware ESXi 5

I have physical server with 2 Broadcom NIC's. First NIC connected to local network, via this connection we can: Connect to ESXi hypervisor (hypervisor has local ip, e.g. 192.168.1.5) Connect to VM ...
2
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1answer
2k views

VMware or Xen support for AIX on pSeries architecture

I tried to find an explicit confirmation on VMware website if there is any chance we could virtualize AIX running on pSeriese architecture (P5, P6 and P7), but in vain. so far we have only one ...
5
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1answer
810 views

Linux high RAM usage for unknown reason

after searching around for this and only finding posts of people who do not interpret the "cached" figure correctly, I decided to ask this question. I have some servers at hand, which act strangely. ...
2
votes
3answers
86 views

KVM guest is unable to access the internet

I have a Debian host that has several allocated IPs and KVM with a Debian guest using a bridged network. The guest is completely unable to reach the network, including the LAN or even the host. ...
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2answers
37 views

Recover Xenserver VM's in Linux Rescue mode WITHOUT Xenserver host

My physical server got hacked so my provider has shut down the server and booted it in Linux rescue mode. I've got full access to the file systems in Linux, however after hours of trying and searching ...
13
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3answers
7k views

How much overhead does x86/x64 virtualization have?

How much overhead does x86/x64 virtualization (I'll probably be using VirtualBox, possbly VMWare, definitely not paravirtualization) have for each of the following operations a Win64 host and Linux64 ...
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3answers
108 views

IT training for 20 delegates - Windows server 2008

I am looking at training 15 - 20 individuals on Windows server 2008. The training will require each individual to perform certain tasks within their own instance of windows server 2008, such as ...
4
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6answers
690 views

Do I need a journalling filesystem for both host and guest operating systems when using virtualization? [closed]

Using VirtualBox, I've got a few Linux guests for different distros running on an Ubuntu host. What filesystem layout will give the best performance? Is it worth it to set up a different partition ...
0
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1answer
54 views

ls SCVMM 2008 R2 supported on Server 2012?

We currently have SCVMM 2008 R2 on a Server 2008 R2 PC. We are looking to upgrade the server to Server 2012 (possibly R2). Is Server 2012/Server 2012 R2 a supported or compatible operating system to ...
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4answers
610 views

How to access AoE block device from Redhat Hypervisor

This is the first time I've used Redhat Enterprise Virtualisation Manager & Redhat Hypervisor, after normally going the more home grown approach of a group of Redhat/CentOS KVM hosts. Our SAN ...
0
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0answers
31 views

How to configure VXLAN over linux bridge?

I am using Ubuntu 14.04 which support VXLAN configuration. Currently I can add a VXLAN interface such that: vagrant@ubuntu:~$ sudo ip link add vxlan1 type vxlan id 1 group 239.1.1.2 vagrant@ubuntu:~$ ...
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3answers
15k views

Xen vs. VirtualBox under heavy load?

Which performs better under heavy CPU and memory usage on the virtual servers, Xen or VirtualBox?
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1answer
854 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 ...
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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
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1answer
37 views

Transfer physical Windows Server 2008R2 licence to Hyper-V server [duplicate]

I have a plan to upgrade my 2008R2 Standard Edition to 2012R2 Standard Edition, and then virtualize them with Hyper-V 2012R2. Is it possible to upgrade from Windows Server 2008R2 Standard Edition to ...