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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Custom Windows AMI for Amazon EC2

I am new to the Amazon EC2 services and I am planning to host a Windows based vm on Amazon. I have lot of fuzziness about AMIs on Amazon. So my first question would be, am I be able to install ...
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3answers
21k 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
6k views

Postfix - do not list domain example.com in BOTH mydestination and virtual_alias

I have a server with two domains. I get the warning as mentioned in the title: do not list domain example.com in BOTH mydestination and virtual_alias Although I receive the above warning, it works ...
3
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1answer
745 views

Straight-forward to Virtualise with XEN or KVM on IBM Server System x3650 M4 791562G?

I want to built a virtualised Server Environment using XEN or KVM. The virtual machines should be purely debian systems - so XEN or KVM should be a sane choice. Now while buying servers, I am ...
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3answers
1k views

How to find virtualization performance bottlenecks?

We have recently started moving our C++ build server(s) from real machines into VMs. (MS Hyper-V) We have some performance issues that I've currently no idea how to address. We have: Test-Box - ...
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1answer
150 views

xend doesn't bring up the vif interfaces

I'm trying working with Xen and I've tryed to build up a virtual machine in domU. I'm using the following configuration for the domU kernel = '/media/home_separata/domU_kernel/boot/vmlinuz-linux' ...
3
votes
1answer
169 views

Why do server vendors always ship them with disabled hardware virtualization support? [duplicate]

Possible Duplicate: Enabling hardware virtualisation BIOS; anything to beware? This, which seem to be common practice for all hardware vendors, has been bugging me for a while: why is ...
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2answers
2k views

What does Linux Server Virtualization mean?

Today, I went for an interview and I was told that for a few months, I will be doing Linux server virtualization. I kind of know what virtualization means since I use Virtualbox but I'm not entirely ...
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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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3answers
2k views

VM Host needs to join the domain in Virtual Machine

How to configure Windows Server 2008 R2 Datacenter to join a domain which is created by its child Virtual Machine ( which is the Domain Controller, given that the Virtual Machine starts at the startup ...
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votes
2answers
718 views

Most suitable filesystem for virtualized Linux system?

Is there a clear winner in the filesystem area? As in, does some filesystem perform significantly better in a virtualized environment such as VMWare or VirtualBox? Is there more or less disk space ...
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7answers
7k views

SQL Server Slow but CPU Normal

We're having some trouble with SQL Server hosted on a virtual server. We occasionally have short periods where even performing a simple select takes minutes. During this period the CPU and memory ...
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2answers
75 views

How to require all network activity to pass a KVM guest firewall before reaching the host?

Most of the information I've come across tends to set up a KVM firewall using a bridge connection. From my understanding it is a security risk if network traffic can reach the host without having to ...
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3answers
188 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. ...
2
votes
1answer
432 views

xm re-create configuration file from existing vm

I have Xen set up and working quite nicely. When I reboot and use: xm list I get this output: Name ID Mem VCPUs State Time(s) Domain-0 ...
2
votes
1answer
845 views

SAN: is it better to have separate LUNs for operating system and data of virtual machines? [closed]

We have an iSCSI SAN that will be used as backing store for virtual machines. We use Xen and will directly present the LUNs as block devices of VMs (so there is no file system with files on it for ...
2
votes
1answer
351 views

Copy an Amazon EC2 Instance to use locally

Ok, so we have a spare server I have installed Debian Wheezy on, and setup Xen on for virtual machines. It has better performance than all our ec2 instances combined, and will cost less to run (for a ...
2
votes
1answer
873 views

Configure Windows to Read/Write Shared SAN

I am working on building a NLB cluster to load balance for JavaEE portal. Both are Virtual Windows 2008 R2 and connected via Fiber Channel to an EMC SAN Storage. They should read/write files into the ...
2
votes
1answer
735 views

transfer vm machine created in virtualbox to vmware player [closed]

Fedora 17 Host Oracle VirtualBox 4.2.4 Vmware Player 5.0.1 build-894247 I have Fedora 17 and have installed Virtualbox and vmware player. I created a CentOS virtual machine guest in virtual box. ...
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2answers
2k views

Is it possible to run a “Windows Server 2008 R2 SP1 Hyper-V Virtual Machine” on Windows 7x64 Pro machine?

Specifically, I want to run this: http://www.microsoft.com/en-us/download/details.aspx?displaylang=en&id=27417 This download contains a three Windows Server 2008 R2 SP1 Hyper-V Virtual Machine ...
2
votes
3answers
159 views

Max CPU load in *nix

I am running an Ubuntu 12.04 server via a virtual machine (it is running on vmware's ESXi hypervisor) but I am not convinced it has full access to the 8 CPUs that I have assigned to it. My physical ...
2
votes
2answers
977 views

Virtualizing Firewalls/UTM

So Sophos UTM (Astaro Gateway UTM) can be virtualized in Hyper-V, VMWare, vSphere etc. Now I'm new to virtualization, so am wondering how the networking would be configured in this situation. ...
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2answers
3k views

How to set up internal routing between virtual interfaces and real ethernet interface (Linux)

I have a Linux box with one real (as opposes to virtual, a.k.a. aliased) Ethernet interface I can use (eth0 is used for other purposes - can't use it, nor can I add more NICs). Say it's eth1 I need ...
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votes
3answers
747 views

How do I host multiple servers on Hyper-V with only a few public IP addresses?

I have a dedicated server, which is currently running Windows 2008 R2 Web edition and VMWare Server. I am upgrading to Windows Server 2008 R2 Standard with Hyper-V. Once upgraded, it will have 24GB of ...
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2answers
352 views

Manage Hyper-V Server 2008 R2 from same machine

Is there a way to manage Windows Hyper-V Server 2008 R2 from within itself? E.g. not remotely. I'd like to be able to manage VMs as well as connect to and work with a a VM in full screen mode. This ...
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votes
4answers
3k views

VMware NAS/iSCSI recommendations - smallish organization

I have two VMware servers - ESX + ESXi. Two backup NAS boxes. The current NAS boxes are low-cost and unsuitable for running VMs from. Support NFS only. Slow. My plan is to have a dedicated iSCSI/NAS ...
2
votes
1answer
67 views

Which Hyperviser Solution for Java Applications?

Do you have any comment which of the available hypervisor solutions is best suited for Java applications? i.e. provides higher performance along with Java virtual machine? Our machines are mid-level ...
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votes
4answers
2k views

CentOS or OpenSolaris for Xen dom0?

I would like to play around with Xen with the intention of eventually running a bunch of different services on separate virtual machines (partly just because I can), and have the possibility of trying ...
2
votes
4answers
2k views

Recommendation for RAID in Virtual Server

We’re planning on going virtual from this point forward and our plan will be 1 server, 1 task, so while we are a small company we're going to have a high number of servers for our size, but this ...
2
votes
5answers
2k views

Virtual PC - Display Issue with Ubuntu Server

I just did a clean install of Ubuntu Server 9.04 in Virtual PC on the Windows 7 RC, and it seems to be having a bit of an issue with the virtual machine's display adapter. I've tried setting a VGA ...
2
votes
3answers
2k views

DRBD / Heartbeat on Virtual Machines

Does anyone have experience configuring drbd with heartbeat between 2 virtual linux machines (VMWare Infrastructure)? The problem I am running into is that heartbeat likes multiple data paths to see ...
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1answer
801 views

VPN SSTP windows client can not ping or connect to VPN server but it can talk to every other PC on the local LAN that VPN server is on

So I have an SSTP (with native Windows client) working fine in a sense. My windows client's local IP is 192.168.10.11 , so its local network is: 192.168.10.x The Remote VPN server is behind a router ...
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2answers
377 views

Pros and cons of virtualization [closed]

I'm aware of many questions here discussing similar topic, but in this case, I'll try to be much more specific. One target scenario is small to mid-size ISV, the second scenario is an enterprise ...
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vote
2answers
5k views

Can not boot CentOS VM using VirtIO in KVM

I converted qcow2 image to raw and changed I/O bus to VirtIO for a VM. now I can't boot that VM. I Installed VirtIO driver with following command: mkinitrd --with virtio_pci --with virtio_blk -f ...
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vote
1answer
692 views

How do I measure and compare disk performance of my Hyper-V Windows VM?

I'm not sure whether this sounds stupid or lazy, but I'm really not sure. I have a problem with the performance of a VM setup (2008R2-64bit Hyper-V running a 2003R2-32bit Windows server) and I'd like ...
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2answers
840 views

virt-manager doesn't show list of local KVMs but virsh does

When I open virt-manager GUI it doesn't show list of KVMs but virsh does. how can fix it?
1
vote
1answer
799 views

Difference between Intel-VT and AMD-V

What is the difference in hardware between Intel-VT and AMD-V? I am currently reading Virtual Machines: Versatile Platforms for Systems and Processes chapter eight and Intel-VT is mentioned there but ...
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2answers
2k views

Postfix virtual domains: how to accept all subdomains except for two?

Assuming my Postfix server serves the domain example.com, I want it to accept mail for all the subdomains of example.com except for mail.example.com and in.example.com. At first I've tried using a ...
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vote
2answers
6k views

hyper-v could not initialize memory there is not enough space on the disk (0x80070070)‎

I have created a virtual machine on a Hyper-V server, Dell PowerEdge with 24 Gb of RAM. I want to have four VMs with 2048 Mb of RAM each. Originally, I created this one (SV-YAMATO) with 512 Mb of RAM, ...
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vote
1answer
936 views

OpenVPN routing for OpenVZ containers

I am trying to make OpenVPN tunnel accessible for all OVZ CT's running on the host. I have initialized the tunnel devise on the host server to remote VPN server. Although I have PING response from the ...
1
vote
1answer
2k views

setting up a high speed load balancing server cluster - web/db/NFS

I'm looking for advice on the best way (mainly in terms of hardware) to set up a high speed load balancing server cluster on a budget (say £2,000 - £ 3,000) to host web services behind a single ip ...
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vote
1answer
247 views

Using a clone to upgrade a Virtual Machine

If I'm planning on upgrading a server application, what is a good way of getting network access, while preventing duplicate network names or other side effects? The current process I was going to try ...
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2answers
133 views

Running 2 virtual hosts side by side interactively - no guests, just hosts

Are there any virtualisation products out there that let me run Windows XP and Linux side by side and interact with both of them at the same time without logging into them from another computer. i.e. ...
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2answers
240 views

Is the # of CPUs on a virtual machine always meaningful?

On a virtual machine, if cat /proc/cpuinfo tells me that there are 4 CPUs, is this just as meaningful as if it were bare metal? Should I configure my server (for example, # of Nginx or Apache workers) ...
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4answers
546 views

OpenVZ Host is the source IP address rather than actual web surfers?

I have a problem with my VPS. Simple example: <?php $ip = $_SERVER['REMOTE_ADDR']; Echo "User IP : " . $ip; ?> That code should display the user IP address, but it's showing the HN IP ...
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2answers
4k views

How do I know if my Xeon Processor supports hardware virtualisation?

I've been scouring the net (mainly the wikipaedia lists and intel's site. I even pulled out the datasheet for my processor) but I can't seem to answer this question. Does my Xeon support hardware ...
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2answers
187 views

What would be the best virtualization solution for this particular use-case?

I do software (mostly web) development, and I work alone, so I have to cope with a lot of sysadmin-type work, in order to setup different stacks of web/application/database/source-control servers, let ...
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2answers
638 views

Configure Windows Routes for VPN

I have a Virtual PC/VMWare machine that runs Windows Server 2003. This virtual machine uses an IPSec VPN client program to connect to a remote network. I configured the virtual machine to have 2 NICs: ...
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1answer
1k views

ZFS virtualized on an LVM volume

We've got some large SATA disks kicking around, and I've been toying with the idea of throwing them in a KVM host and installing a FreeNAS VM to manage them. I'd be adding these via LVM to the host, ...
0
votes
1answer
159 views

How to create bridged network interface for Xen?

I'm trying to use Xen on an Ubuntu server for the first time and have a really basic question. I'm following the guide in the Ubuntu docs and under the Network Configuration->Using bridge-utils ...