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• KVM online disk resize?

  - by Eil

  We're evaluting KVM for Linux virtualization on a few projects. All is going well so far. But one of our requirements is the ability to add disk space to a running guest without rebooting or taking it offline. Is this possible with KVM? The only thing I've found so far (but have not tested yet) is the ability to hotplug disks into the machine. If I go this route, then I could always add the new disk to an LVM volume group on the guest and then extend the chosen logical volume. The biggest downside to this approach is that over time we might end up with guests having variable numbers of virtual disks. The "real" disk space would be provided to the host over a SAN, so we can always add more space to the host whenever.

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• Q8300 Core-2 Quad vs X3360 Xeon

  - by alchemical

  I'm looking at this ABMX server, and trying to decide on the CPU. I'm purchasing 2 servers, to be used as dedicated web and DB servers for a web site that has low traffic now but could ramp up quickly. Just trying to decide if it is worth about $200 more (per server) for the Xeon vs the core-2. Passmark rates them at 3567 and 4153, which didn't seem that different. I'm not planning at this point to need virtualization. I did hear rumors that Xeon stands up better in a 24/7 server environment, but heard others say there wasn't that much difference. Planning to run Windows Server 2008, likely the R2 release, with 8GB RAM.

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• Setup VLAN agnostic ports on HP ProCurve 1810G (Ingress Filter, Trunking)

  - by Thomas

  I am wondering if it is possible to configure some ports of the web managed ProCurve Switch 1810G to participate in all VLAN traffic. Even if no VLAN with that ID has been set up inside the switch. The issue is that I have two virtualization servers that will use yet unknown VLANs of a certain range to communicate with each other. But the range is much larger than the 64 supported VLANs this switch can manage. The switch also offers static and LACP Link Trunks. But I guess there will also apply the Ingress Filter that drops packets with unconfigured VLAN IDs? A separate unmanaged switch that connects the two hosts and one ProCurve Port would work, but maybe I do not have to? Thanks

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• Implementing a Linux-HA based clustering setup on Windows

  - by Alex

  I have a (tried and tested) setup involving: 2x Load balancing nodes on a floating IP via Heartbeat, load balancing 2 tomcat servers. 2x Tomcat servers 2x Galera Cluster MySQL servers synchronously replicating (+1 arbitrator node) All are evenly spread across 2 physical nodes. Now, I have to somehow get the same functionality on Windows Server (2008? I think) nodes .... running under Xen virtualization. There is no possibility to use Linux for any of the nodes. I count two main problems: No Linux-HA hearbeat daemon for the load balancing No Galera synchronous replication for MySQL I freely admit to having nearly no Windows knowledge when it comes to clustering. Is there a way to closely mimic the setup I have described or is it a total write-off?

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• Hyper-V Manager: right-clicking on remote VM crashes MMC snap-in

  - by Greg Bray

  I have a Windows Server 2008 R2 Enterprise SP1 machine that I log into and use to manage virtual machines running on multiple Hyper-V servers on our domain. Sometimes, when I right-click on a remote VM, the Hyper-V Manager will crash and display the following error message: If I use the Actions menu on the lower right, it works just fine, but for some reason right-clicking causes MMC to stop working. Is there any way to fix this issue? Here are the full details of the error message. Description: Stopped working Problem signature: Problem Event Name: CLR20r3 Problem Signature 01: mmc.exe Problem Signature 02: 6.1.7600.16385 Problem Signature 03: 4a5bc808 Problem Signature 04: Microsoft.Virtualization.Client Problem Signature 05: 6.1.0.0 Problem Signature 06: 4ce7c9e3 Problem Signature 07: 342 Problem Signature 08: 1f Problem Signature 09: System.OverflowException OS Version: 6.1.7601.2.1.0.274.10 Locale ID: 1033 Read our privacy statement online: http://go.microsoft.com/fwlink/?linkid=104288&clcid=0x0409 If the online privacy statement is not available, please read our privacy statement offline: C:\Windows\system32\en-US\erofflps.txt

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• Log application changes made to the system

  - by Maxim Veksler

  Hello, Windows 7, 64bit. I have an application which I don't trust but still need to run. I would like to run the installer of this application and later on the installed executable under some kind of "strace" for windows which will record what this application did to the system. Mainly: What files have been created / edited? What registery changed have been made? To what network hosts did the application tried to communicate? Ideally I would also be able to generate a "UNDO" action to undo all the changes. Please don't suggest full Virtualization solutions such as Virtualbox, VMWare and co. because the application should run in the host system (A "sandbox" approach will OTHO be accepted, IMHO). Do you any such utility I can use? Thank you, Maxim.

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• Can't find my.cnf on my VPS

  - by dan

  Ok i am a total noob when it comes to servers (but eager to learn). I am renting a VPS so i can host a magento store. The VPS is using Centos5 and DirectAdmin and XEN virtualization. I've read a bit about how to optimize magento and one suggestion is to edit 'my.cnf'. However i can't find this file anywhere from within DirectAdmin. I also can't connect to the VPS via console as my host has a console access via their website but it won't let me enter my root password it just hangs...(how do people normally connected to their linux VPS?) Please help? ThankYou.

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• Registry in Windows7 - appears in powershell, but not regedit

  - by Dan

  Hi. My software is writing to the registry (HKCU:\software\classes\clsid\). The key that I'm writing isn't appearing when I go to that location in regedit. However, if I navigate to that location in powershell, then I see ONLY the entry I added, and not the other class ids that I see in regedit. It's almost as if there's two versions of the registry. I'm using Windows7 (moved recently from XP, so there's probably some weird virtualization stuff going on which I've not learnt yet! ;-)). Thanks for any help with this, Dan.

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• How to route HyperV VMs traffic through host VPN

  - by Random

  I'm using Windows 8.1 Pro with HyperV. I have several VMs for development, all of them connected with host via Internal adapter using network addresses: 192.168.10.0/24 Where: 192.168.10.1 is my host's Hyper-V internal NIC address. When I'm not in my office I use 3G usb dongle an dialup VPN connection. I would like to route traffic from all existing and future VMs through the VPN. In best scenario traffic would be routed only partially to the local company network addresses 10.1.1.0/24 I don't want to use sharing because I'm switching between WiFi, USB 3G dongle and VPN. Moving to other virtualization is also not an option for me.

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• Bridge virtual machines out WLAN interface

  - by Thomas

  It seems that my wlan card (intel 5100 AGN) firmware doesn't allow "spoofing" MAC addresses. This has the side effect of destroying the capability to bridge out my virtual machines on that interface. Apparently this is a common thing on wlan cards. I can see the incoming traffic just fine in my virtual machines, but their DHCP queries don't get bridged out of the WLAN card. It works perfectly well when using the wired ethernet port. Is there a workaround for this? MAC-NAT or something? I don't want to route my virtual machines out to the Internet because I don't want my host OS to even have an IP address. I'm using Linux and KVM for virtualization.

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• Classic ASP on large memory server

  - by Steve Evans

  I have a client with a large ASP app that apparently is fairly memory intensive. I’m helping them migrate to new hardware they have running Win2k8 R2. They have 4 physical servers with 32gb of RAM each. I’m making the assumption that ASP apps run as a x32 process. So I see that we have two options: On the application pool enable web gardens. Use the physical servers as VM hosts and split the box into say 4 web servers each. Any thoughts on which path will provide us better performance? I’m just not really sure how ASP will handle a machine with lots of memory, and I’m worried it won’t really be able to address the memory well. (you can ignore all the obvious stuff like increased maintenance of 16 web servers vs 4, or the flexibility virtualization gets us over physical servers, etc)

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• Hyper-V Manager right clicking on remote VM causes MMC error

  - by Greg Bray

  I have a Windows 2008 R2 Enterprise Server with SP1 that I log into and use to manage virtual machines running on multiple HyperV servers on our domain. Sometimes when I right click on a remote VM the HyperV Manager will crash and display the following error message: If I use the Actions menu on the lower right it works just fine, but for some reason right clicking cause MMC to stop working. Is there any way to fix this issue? Here are the full details of the error message. Description: Stopped working Problem signature: Problem Event Name: CLR20r3 Problem Signature 01: mmc.exe Problem Signature 02: 6.1.7600.16385 Problem Signature 03: 4a5bc808 Problem Signature 04: Microsoft.Virtualization.Client Problem Signature 05: 6.1.0.0 Problem Signature 06: 4ce7c9e3 Problem Signature 07: 342 Problem Signature 08: 1f Problem Signature 09: System.OverflowException OS Version: 6.1.7601.2.1.0.274.10 Locale ID: 1033 Read our privacy statement online: http://go.microsoft.com/fwlink/?linkid=104288&clcid=0x0409 If the online privacy statement is not available, please read our privacy statement offline: C:\Windows\system32\en-US\erofflps.txt

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• Advise on VMWare hardware requirements and host OS

  - by edwin.nathaniel

  Hi All, I'm a newbie developer wanting to learn a bit about Virtualization (from the IT point of view, not theoretical/academic). What I'd like to do: Prepare a machine Install VMWare or VirtualBox Prepare 3 Guest OSes (one for Win2k8 server, 2 for Ubuntu Server) Win2k8 will run SQL Server 2k8 and IIS (for ASP.NET MVC deployment) 1 Ubuntu Server for Drupal, SugarCRM, MediaWiki, typical LAMP stuff 1 Ubuntu Server for Java (Tomcat/Jetty + MySQL/PostgreSQL) What I'd like to know: What would be the ideal Host OS such that the Host OS should not spend too many resources on itself but should boost these instances of VMs (e.g: does Win2k8 performs better vs Linux?) What would be the ideal machine for this (preferably AMD base chip) I'm not expecting the best performance out of this setup, just a decent one to host one drupal instance, one ASP.NET MVC (future, not now), and one Tomcat/Jetty instance. NB: If you have a better suggestions on the setup, feel free to let me know (e.g: maybe Drupal and Tomcat can be in one instance but move the database to another instance instead of 1 instance map to 1 webserver and 1 dbserver). Thank you.

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• Processor Upgrade HP Elite M9510F

  - by DaveM

  I have an HP 9510F that uses the ASUS IPIBL-LB MB. It ships with an Intel Q8200 Quad Core processor but it does not support virtualization. Specs for the board from HP (ASUS does not list this OEM board) do not show support for the Intel Q8200 it ships with (obviously incorrect) but only these • Supports the following processors: o Intel Core 2 Quad (Yorkfield core) Q9xxx o Intel Core 2 Duo (Wolfsdale core) E8xxx o Intel Core 2 Quad (Kentsfield core) up to Q6600 o Core 2 Duo E6x00 (Conroe core) up to E6700 o Core 2 Duo E4x00 (Conroe core) up to E4400 Can this MB support the Q8400 or will it only support the indicated Q9xxx series? Naturally HP is little help here. Specs are located hereHP/ASUS MB specs

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• moving from Exchange 2003 to Exchange 2010

  - by pcampbell

  Consider a small-medium business' deployment of Exchange 2003. The question is around migrating to Exchange 2010. Here's a bit about the landscape: Current state is 50-100 users/mailboxes with the majority using Outlook 2007 OWA enabled desktop users are NOT running in Cached Exchange Mode laptops users ARE running in Cached Exchange Mode a single Exchange server with modest or reasonable specs for the day (3gz, multi-core, 4gb, Win 2003 32-bit) Questions Do you have any suggestions for the admin team regarding the upgrade path/steps from Exchange 2003 to 2010? Considering the requirement of a 64 bit OS, consider a new separate machine as ready to go with Win 2008. Have I missed any details? Where might virtualization help in this project? Any lessons learned in previous upgrades (2007 or 2010) would be appreciated!

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• Virtualizing WindowsXP on Linux Fedora 12 for Photoshop....

  - by Rae

  I am running a Linux server from 2000, I have Fedora12 installed as the OS. I know you can virtualize Windows XP on the system to be able to run Windows programs, but the problem is I My server has only one 1333Mhz Pentium 3 processor and 1G of Ram. granted this is a pretty kick ass computer for the day, but lacking the second processor I'm afraid that I will not be able to run Windows virtualization to support Photoshop CS3. Is there any program out there that runs similar to Photoshop, like windows Digital Image suite 10, that will run smoothly in my Linux Fedora 12 environment? or can I virtualize windows and run the Windows digital image suite 10, without slowing or corrupting my system?

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• Recommended CPU upgrade for Dell Vostro 220 with E7300 processor?

  - by Justin Grant

  I've got a Dell Vostro 220 with an E7300 processor (Intel Core 2 Duo @ 2.66Mhz, LGA775 socket) and I'm thinking about upgrading my processor so I can run Windows Server 2008 R2 with Hyper-V, which requires Hardware Virtualization support in the processor. Yes, I know this is underpowered for a server, I'm actually using it as a desktop machine but I'd like to use Hyper-V instead of Virtual Server (which I'm using now for running VMs). I'd like to keep the same motherboard and ideally the same CPU fan and RAM too. Any suggestions for a good, relatively cheap (under $200) processor upgrade?

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• MAC OS for Intel based PCs

  - by Maven

  I have an Intel dual core PC with 4GB of RAM and Graphics card. For on of my student Assignment I need to install Latest possible MAC OS on my system as a secondary OS. Like on boot it asks me that which OS i want to boot with Win 8.1 or Mac Os.. I searched on the internet and found two conflicting opinion some people said there are few MAC OS Version which can be directly installed on Intel PCs some says there aren't? I am here to get rid of the confusion that is an official latest possible MAC OS version for Intel based PCs? If not what are my options if I want to run MAC OS on my PC. Please not that Virtualization options won’t work for me, it has to be working as full OS not an os inside another.

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• Screenshot before windows starts: without another computer?

  - by Nano8Blazex

  I'm pretty sure that this must have been asked before, but haven't found a duplicate question, thus I shall ask again... Is it possible to take a screenshot of my computer before the OS boots up WITHOUT an external computer or virtualization software like VMWare?? e.g. at the BIOS, or the "Windows is Loading" screen, even at the login screen? Is it possible to take screenshots of BSODs as well? EDIT: I'm using a desktop pc running Windows 7 Ultimate in a home environment. Thanks.

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• Virtual DNS recommended setup...

  - by luison

  Hi. We are new to virtualization which we are setting up with Proxmox VE (OpenVZ + KVM). I am a bit lost about the recommended DNS forwarder config specially in the OpenVZ (Virtuosso type) of enviroiment. Our intention was to have a small dnsmasq running in one of the VM acting as backup DHCP server and serving our in-office local addresses (and PCs) by an additional resolve.conf file which dnsmasq supports, but I've read that all VM should share DNS pointing to the host machine in which case it would make more sense having it there. My problem is that I would like to have as least as possible apps in the host so a reinstall of the environment (porxmox ve) and a machine restore can be as quick as possible. Does anyone have a similar setup? Does it make sense to have the 1st virtual machine running the local dns forwarder? Also... dnsmasq seems to want to have root permissions when running on an OpenVZ container... are there any work arrounds anyone knows for that.

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• Recommended CPU upgrade for Dell Vostro 220 with Intel E7300 processor?

  - by Justin Grant

  I've got a Dell Vostro 220 with an E7300 processor (Intel Core 2 Duo @ 2.66Mhz, LGA775 socket) and I'm thinking about upgrading my processor so I can run Windows Server 2008 R2 with Hyper-V, which requires Hardware Virtualization support in the processor. Yes, I know this is underpowered for a server, I'm actually using it as a desktop machine but I'd like to use Hyper-V instead of Virtual Server (which I'm using now for running VMs). I'd like to keep the same motherboard and ideally the same CPU fan and RAM too. Any suggestions for a good, relatively cheap (under $200) processor upgrade?

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• Could it be sane to use Windows Server 2012 as desktop

  - by nCdy

  what about using it on desktop? I've got enough strong PC with intel core i7 and 8GB Ram so what should I think about: why not? Were looking about major differences compared to windows 8, found less. for example new file system - can it affect me? In my usual day I need development instruments alike visual studio, virtualization tools, and some games So far I can't find something that must stop me, everything I need can work (seems like) there. Tell me why I must not do it or if that is sane to do.

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• XEN disk mapping problem under opensolaris

  - by Louis

  I have a system with two harddisks, i wanted to use the simplicity of ZFS for my file server and i also need to run a linux. I choosed XEN virtualization for that, supported on both system. My GRUB is well configured and i can boot both system. I would like is to run both system with solaris as a dom0 and the debian installed on the 2nd HD as a virtual machine. My problem is that i want to use the partitions of my 1st harddisk (sda1 under linux) and it does not work. I didn't find my use case on the web- Here is my Opensolaris device name of this partition : /dev/rdsk/c7d0p1 But when i use : disk = [ 'phy:rdsk/c7d0p1,sda1,w' ] as a disk mapping in my XEN configuration file i have the error : Error: Device 2049 (vbd) could not be connected. error: "rdsk/c7d0p1" is not a valid block device. I am "lost".

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• VirtualBox serial port, limit of two?

  - by Evan Carroll

  Using VirtualBox, Is there a limit of two serial ports per VM? I'm currently engaging in a task that requires more than two, but less than or equal to four ports. I'm at a loss of what to do to get COM3 and COM4 up? How do I do it if the Virtual Box GUI doesn't currently support more than two serial host devices? Can I configure them external to the GUI? Is there a hard-cap on two devices? And, if so, for the love of god, please entertain me with the reasoning? I know Windows and Linux don't impose such a limit, it would seem awkward to impose it in virtualization layer. This is for cheap dial-in project with proprietary Windows tools. I'm using a Quatech serial multiport adapter to provide the ports to multimodems.

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• Limit disk I/O one program creates?

  - by Posipiet

  Hardware: one virtualization server. Dual Nehalem, 24GB RAM, 2 TB mirrored HD. Software: Debian, KVM, virt-manager on the server with several virtual machines that use Linux too. 2 TB Disk is a big LVM, each VM gets a logical volume and makes its own partitions in that. Problem: One of the programs that runs on one of the VMs creates huge disk load. This never was an issue, because the program never ran on such a powerful hardware. Now the CPUs are fast, and lots of I/O is the result. We cant do much against that at the moment, because the tool is a black box. On the other hand, the speedy computation is welcome. The program creates about 5 GB of temp files which get overwritten during the next iteration. Question: How can we limit the disk I/O for the process?

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