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
288 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 ...
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1answer
567 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
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2answers
14k 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 ...
2
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1answer
223 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 ...
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3answers
5k 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 ...
2
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1answer
723 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
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1answer
680 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
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3answers
146 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
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2answers
837 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. ...
2
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2answers
2k 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 ...
2
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3answers
722 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 ...
2
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2answers
349 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 ...
2
votes
2answers
504 views

Can I safely create new Virtual Machines from copies of VHD without sysprep?

I have VHDs of Web Servers (IIS) and Database Servers (SQL). Can I safely copy/paste the VHDs and create new Virtual Machines from those without a sysprep? Questions: The machines will have ...
2
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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 ...
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votes
2answers
1k 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 ...
2
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1answer
66 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 ...
2
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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 ...
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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
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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 ...
2
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6answers
6k views

How to improve Hyper-V performance

I have a windows 2008 (RC2) server running Hyper-V with all of my company's virtual machines. Most of the machines are used to run Continues integration and test environment. Although each machine ...
1
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1answer
347 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
4k 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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1answer
603 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
683 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
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1answer
646 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
1k 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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2answers
5k 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, ...
1
vote
1answer
793 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 ...
1
vote
1answer
244 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
132 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. ...
1
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2answers
238 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
525 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
3k 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 ...
1
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2answers
183 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 ...
1
vote
2answers
634 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: ...
1
vote
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
39 views

What benefit is there to using Vagrant for AWS resource management when using Ansible for provisioning?

I understand that Vagrant is a tool to create and manage virtual machines; and that Ansible is a tool to configure one's machines (virtual or otherwise). However, Ansible's AWS modules are capable of ...
0
votes
1answer
54 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
1answer
73 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 ...
0
votes
1answer
284 views

SSH using Agent Forwarding with Windows Host OS, Vagrant Ubuntu Guest OS, and Keepass/Keeagent

Intent: To be able to deploy to lan-example.com from any dev environment; whether it be directly from the virtual OS, or any single-OS system, or even over the internet using ONE SSH key stored in ...
0
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1answer
114 views

How to create a single image of Windows Server 2008 R2 to use on a Azure Virtual machine

I am trying to migrate from a colocation where I own the servers to Azure. I have been following this article: ...
0
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0answers
129 views

opensm reports - Invalid requested MGID. What does it mean?

I've been working on a virtualized SR-IOV infiniband interface under Xen. If I run the OpenSM daemon under Dom0 IPoIB appears to work in the passed through VF. However, opensm starts using a lot of ...
0
votes
1answer
545 views

How can I connect two virtual machines in vSphere ESXi 4.1?

There is documentation available for version 5 (I am running 4.1 per the title), but following the directions raises the error: Incompatible device backing specified for device '0'. upon ...
0
votes
3answers
168 views

What is the purpose of a Physical Standalone Server

What is the purpose of a physical standalone server Vs a server which hosts several logical servers? I am from a development background and constantly build sever client - server systems. However, I ...
0
votes
2answers
543 views

Which hardware to VM ratio for Build-Server virtualization?

After a few comments and answers and thinking, I hope I can now add a TL;DR : If I want full performance(a) and (simple) HW failure redundancy, does it make any sense to go for a virtualization ...
0
votes
2answers
2k views

Have to dhclient each restart to access internet

So each time I restart my ubuntu server (virtual 10.04, via Xencenter), I have to call dhclient before I can access the internet: http://img813.imageshack.us/i/dhclient.png/ What do I need to change ...
0
votes
1answer
409 views

Can I set noatime for my XEN guest OS partition? Will it work?

I have a VPS in cloud environment based on XEN Virtualization platform. /etc/fstab looks like that: LABEL=PRGMRDISK1 / ext3 errors=remount-ro 0 0 As far as I know IO can pretty ...