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• XenServer: Editing clone configuration before boot

  - by Jeff Ferland

  Upon cloning a base image, I need to reconfigure basic settings. Regenerating the ssh host key, changing static IP assignments, setting the host name, etc. Because of the network setup, DHCP is not an option. That more or less rules out SSHing in with a predefined key or running a startup script since I can't provide the IP externally. I'd most like to mount the filesystem of the new machine on Dom0, but the lvm volumes are exported and it appears to be Bad Form to import them so the Dom0 machine can see them. What's your best suggestion for altering files in a cloned VM before boot? Must be non-interactive, and I'm going to guess out the gate that scripting access via xe console is not going to work well.

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• Fragile XenServer won't create new VDIs anymore

  - by thoiz_vd

  I'm getting increasingly frustrated with XenServer. Currently I'm using 5.6FP1 and it seems to be very fragile. Canceling any VDI-related action almost guarantees trouble. This time I tried to create a new VM using a snapshot for a template, with the fast disk cloning option disabled. It would take much longer than I was able and willing to keep my XenCenter open, so I canceled it. That took ages too, so I had to decide to "Quit Anyway." Since, I seem unable to create any new VDI. New attempts at cloning halt with "The attempt to clone the VDI failed," and creating new VMs based on built-in templates hang at "Provisioning." I'm in need of some advice how to solve this. What I did so far is run a xe vdi-list, which returned nothing odd to me, but I'm no expert. I assume that an incomplete VDI is blocking my Storage Repository somehow, however, how to deal with that remains unclear.

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• Using Find, Grep, Awk, or Sed To Rename Server After Cloning

  - by ServerChecker

  My client tells me they have cloned a VM in VMWare of an Ubuntu Linux server. Now it's my job to get into all the files and find out what still has the old server name of "bishop" and change it to something else. Also, the IP address is changed and I need to search for that too. How would you typically use find, grep, awk, or sed to find these files and then change them rapidly? In the end, I want to make a Bash script. Of course, I'm not expecting you to tell me every file, but just want to know the technique for finding files with "x" in it and then switching that rapidly with "y".

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• IIS6 - Change the language to English

  - by user93353

  I have a Windows 2003 VM Image which was created by a Swedish Windows Install. Afterwards the language settings of the machine was changed to English. However, I just added IIS6 Windows component to the machine (from Add/Remove Programs) - IIS6 is not in English. It's in Swedish. IIS Manager's Menu options are in English, but the Title Bar uses hanteraren(Swedish for Manager). The IIS Error pages come in Swedish. How do I get IIS's default language back in English.

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• Suggest methods for testing changes to "pam.d/common-*" files

  - by Jamie

  How do I test the changes to the pam.d configuration files: Do I need to restart the PAM service to test the changes? Should I go through every service listed in the /etc/pam.d/ directory? I'm about to make changes to the pam.d/common-* files in an effort to put an Ubuntu box into an active directory controlled network. I'm just learning what to do, so I'm preparing the configuration in a VM, which I plan to deploy in metal in the coming week. It is a clean install of Ubuntu 10.04 Beta 2 server, so other than SSH daemon, all other services are stock.

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• How can I get VirtualBox Guest Additions installed in an Ubuntu 9.10 server?

  - by sutch

  I have a freshly installed Ubuntu 9.10 server installed within a VirtualBox VM instance. From the VirtualBox menu bar, I selected Devices: Install Guest Additions... Then performed the following commands: > sudo apt-get install -y build-essential linux-headers-$(uname -r) > sudo mount /dev/cdrom /mnt/ > sudo /mnt/VBoxLinuxAdditions-amd64.run After some successful looking results, the following error is displayed: Installing the Window System drivers ...fail! (Could not find the X.Org or XFree86 Window System.) After restarting, I was looking forward to some UI integration with my host desktop (resize window, not needing to press right-Ctrl to escape the client window, and having copy and paste functionality. Is it possible to install the Guest Additions without the X Window overhead (I plan to only use for shell commands)? If additional packages are required, which ones?

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• How to separate Hyper-V Private network from the External network

  - by Ron Ratzlaff

  I am setting up a virtual test lab and I configured a domain controller VM running Windows 2008 R2 on my Hyper-V 2008 R2 server. I needed to download and install updates on it so I added an External NIC adapter and got that done. However, systems on my actual real physical domain were pulling IPs from this server and that was a big oopsy on my part so I immediately removed the External NIC adapter until I could find out how to go about keeping the Private and the External separate. If someone from the Server Fault community can help with this since I am pretty new to this, I would be very grateful. Thanks everyone.

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• Install Windows Server 2008 Core on a Dell Optiplex 790

  - by Alex Marshall

  Does anybody have experience installing Windows Server 2008 Core on a Dell Optiplex 790? When I connect to the machine with the Hyper-V Manager Administrator snap-in, and try to create and run a virtual machine, I get the error "The Virtual Machine could not be started because the hypervisor is not running". I've disabled the Execute Disable functionality in the BIOS as was requried for other Dell models, but no matter what combination of security and virtualization settings I use on the machine, I can't get this working. EDIT: I've installed Windows Server 2008 Core on a Dell Optiplex 790, and I'm trying to install and setup a guest VM on the Hypervisor EDIT 2: The Hyper-V role is installed and configured, without any errors in the event log. Hardware-assisted virtualization is also enabled.

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• JVM memory initializazion error after windows update

  - by gianni

  We have three Windows Server 2003 with 2 GB RAM. Server1 tomcat 5.5.25 jvm version SUN 1.6.0_11-b03 Server2 tomcat 5.5.25 jvm version SUN 1.6.0_14-b08 Server3 tomcat 6.0.18 jvm version SUN 1.6.0_14-b08 For the three servers JVM parameters are: -XX:MaxPermSize=256m -Dcatalina.base=C:\Programmi\Apache Group\apache-tomcat-5.5.25 -Dcatalina.home=C:\Programmi\Apache Group\apache-tomcat-5.5.25 -Djava.endorsed.dirs=C:\Programmi\Apache Group\apache-tomcat-5.5.25\common\endorsed -Djava.io.tmpdir=C:\Programmi\Apache Group\apache-tomcat-5.5.25\temp vfprintf -Xms512m -Xmx1024m For some months everithing worked fine. Last friday we installed some windows updates. After the reboot tomcat doesnt start with error: Error occurred during initialization of VM Could not reserve enough space for object heap We reduced the parameter -Xmx1024m to -Xmx768m and now tomcat starts. But we need greater max heap size What happened to our servers ? Thanks in advance.

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• Ubuntu - why would /var/log/dmesg stop updating after boot? does not show panic/cpu_hung errors which the console shows

  - by Tom G

  So I have an Ubuntu 10.04 install VM on a host. Latest 2.6.38-15-server kernel . /var/log/dmesg displays only the bootup but will stop recording after that. It will not show the trace/cpu_hung errors I am trying to troubleshoot. /var/log/dmesg.0 , dmesg.1 nothing - I did a string search for the text that displays on the console during the crash and NOTHING gets logged anywhere in /var/log/* . I have to call into the provider and ask them to take a screenshot of the console since nothing shows in dmesg. Why would /var/log/dmesg not record kernel panics, or such?

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• specify temp folder for msi extracted files used for installation

  - by Binoj Antony

  I was recently installing Microsoft Windows SDK for Windows 7 and .NET Framework 3.5 SP1 to create my build server on a VM (Windows 2003 R2 Std), I was wondering that it would be nice to specify the temporary folder for the files being extracted by MSI for use during the installation. This should ideally work for any MSIs. I have some more virtual hard disks I have attached to this VMs, to point the temporary folder for MSI to one of these virtual hard disks would be quite productive since I can remove/discard this virtual hard disk later. Compacting the C drive VHD is a pain, and does not always reclaim space correctly. I tried changing the %temp% and tmp environment variable with no effect? Or is there any concrete/alternative solution to this type of problem? References: TempFolder Property ?? Windows Installer Wiki

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• High CPU usage when running a CentOS guest in VirtualBox

  - by sagi

  I am running CentOS 5.3 as a VirtualBox 3.0.0 guest running on Windows XP. The Windows host CPU usage is constantly at 50% although the CentOS guest is completely idle (i.e. 0.00 load average). I know this is a common problem related to the 1000Hz frequency that the CentOS kernel runs at, and previously a special kernel-vm packages were released to resolve the issue. However, these packages are out of date and the README says that they are not not necessary as of CentOS 5.3. I found out that there is supposedly a kernel parameter divider=10 that reduces the frequency to 100Hz with the standard kernel but it doesn't seem to have any effect when running inside VirtualBox. Is there any way to resolve the issue without resorting to a custom kernel?

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• Trouble installing ubuntu server on virtualbox (osx)

  - by audio.zoom

  Hello all, I'm trying to install lucid lynx 10.04.2 server on a virtualbox on snow leopard. I have 2 server iso files freshly downloaded one i386 and one 64bit. When I try to start the virtual machine with either one set to be the cd drive I'm getting the same error: Failed to open a session for the virtual machine Ub. Failed to load VMMR0.r0 (VERR_SUPLIB_OWNER_NOT_ROOT). Unknown error creating VM (VERR_SUPLIB_OWNER_NOT_ROOT). Couldn't find anything on it on google so I'm trying to see if anyone else has dealt with this issue. Thanks much in advance! edit: just downloaded the 32bit desktop edition to same avail edit2: ran Disk Utility' replair permissions then restarted. New error VERR_SUPLIB_WORLD_WRITABLE (instead of VERR_SUPLIB_OWNER_NOT_ROOT)

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• KVM CLI install for CentOS 6.3 defaults to Minimal Install

  - by i.h4d35

  So I now I've installed KVM (and its associated tools and packages- libvirt, VMM etc.). On the GUI (i.e using the VMM), installation works as its supposed to. However, when I try to create a VM using the command line interface, the OS (I am working with CentOS 6.3) defaults to a Minimal Install instead of giving me options to choose from at the time of installation. I am trying to install using the following command: virt-install \ --connect qemu:///system \ --virt-type kvm --name testVM2 \ --ram 512 --disk path=/var/lib/libvirt/images/testVM2.img,size=8 --vnc \ --cdrom /media/db18de8e-0853-49fb-80de-5c794d58a46f/CentOS-6.3- x86_64-bin-DVD1.iso \ --network network=default Specifying the OS-type or the OS-variant parameters doesn't make a difference. Is there something that I am missing out on or some other parameter that I must specify? Thanks in advance.

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• What Hypervisors support non-homogenous clusters?

  - by edude05

  I've been using Citrx Xenserver for awhile on a few machines that don't support Hardware Virtualization as a test for various small servers. I recently have been experimenting with moving the PV Vms between machines but Xenserver gives me errors that roughly say I need to have homogenous hardware for this to work. Because of this I haven't been able to setup XenMotion or any of the nice features that come with server pooling in Xenserver. I'm considering moving away from XenServer, however I can't seem to find a Hypervisor that explicitly supports non-homogenous clusters. On a side note, we do have a few idenitally configured Dell 1950s that haven't had any VM solution setup on yet, so if we can find a solution that can allow us to move PVs to those as well that would be great. Non free solutions are OK as well. What hypervisor will allow this? Thanks!

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• performance of vmware-machine on different computers

  - by bxshi

  I'm working on a filesystem improving project, and found a paper says the cheating on benchmark, and it gives a solution that use VMs could help others to reproduce our result. And the question is, if I have made a specific vmware virtual machine, will it runs the same at different computer and platform? For example, I have a virtual machine which is 1G RAM, 4G HD and 2G one-core CPU. Will that runs the same at a qual-core 3G CPU and a 2.4G P4? What if the computer have 4G RAM? Will vmware use some buffer mechanism to improve performance? If that's true, does it means the VM runs on a 2G RAM host will slower than on a 4G host? Hope you can help me on that, or just told me where could I find the answer.

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• Bad I/O scheduler?

  - by user62367

  os: up-to-date Fedora 14. Working as a "normal desktop". It's doing very well, but if i start VirtualBox, and e.g.: install a guest on it, it just "freezez". I mean if there are disk activities on a VirtualBox guest, then the computer becomes unrespondable..even the mouse is laggin for about 50 minutes.. What could be the bottleneck? What could be the problem? If anyone has any tips/howtos to speed it up, please help! It has a normal 2,5" HDD, with 5400 RPM. Does it worth for me if i buy a 2,5" HDD with 7200 RPM? T7200 cpu, 4 GByte RAM, "vm.swappiness = 0". Thank you!

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• Installing Ruby on Rails on Ubuntu 10.04: A Living Nightmare

  - by emptyset

  Update #3: Starting over from scratch, shortened this post, decided to re-install a clean copy of Ubuntu 10.04 on a VM and go through the walk-through again. So, all the steps go without a hitch. As root: root@ubuntu:~/rubygems-1.3.7# ruby -v ruby 1.8.7 (2010-01-10 patchlevel 249) [x86_64-linux] root@ubuntu:~/rubygems-1.3.7# gem -v 1.3.7 root@ubuntu:~/rubygems-1.3.7# rails -v Rails 2.3.8 Now, as myself (in a separate term): emptyset@ubuntu:~$ ruby -v ruby 1.8.7 (2010-01-10 patchlevel 249) [x86_64-linux] emptyset@ubuntu:~$ gem -v /usr/local/lib/site_ruby/1.8/rubygems.rb:10:in `require': no such file to load -- rubygems/defaults (LoadError) from /usr/local/lib/site_ruby/1.8/rubygems.rb:10 from /usr/local/bin/gem:8:in `require' from /usr/local/bin/gem:8 emptyset@ubuntu:~$ rails -v bash: /usr/bin/rails: Permission denied So, this appears to be a permissions issue, but I don't understand why. Specifically, if I have to start making things go+rx all over the place, I really need to understand which specific files need the permissions change.

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• Fsck stuck on "Clone Multiply-claimed blocks"

  - by user3436581

  Update: I fixed the issue. But I don't see eth0 directory in /sys/class/net Any idea how to fix that? I could not bring up eth0 and I need it badly so that I can backup everything over the network since I'm working on VM console. This virtual machine sda1 is stuck. I've tried e2fsck and fsck and both gets stuck after "Clone multiply-claimed blocls? yes" I've waited for around 5 to 8 hours and it still the same. I could not mount the filesystem without fixing these errors. I'm doing this after un-mounting all filesystems in rescue mode.. Reboot does not help. Any suggestions? Screenshot: http://i.stack.imgur.com/lgixr.jpg Alternative screenshot url: http://s27.postimg.org/grk4p9eeb/error.png

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• moving to a new dedicated server and need advice on the new setup

  - by Eric Martin

  I currently have a dedicated server that we have outgrown and we are moving to another server. Our current setup was a 8gb W2008R2 server running a W2008R2 IIS virtual machine using VMWare. We are moving to a 2 cpu 24 gb server with W2012 R2 on Hyper-V. On our virtual machine we are running iis 7.5 and sql server. Sql Server seems to want to eat up all the memory so I had to cap it at 2gb, which doesn't seem sufficient. My question is, when I move the virtual machine to the new server, should I create 2 virtual machines, one for sql server and one for IIS? Or should I leave them both on the same virtual machine? Or even, put the Sql Server on the dedicated server and run the IIS in the vm? I'd like some input on how this should be done, I've not got the experience needed to make the right call. Thanks!

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• PEN daemon as load balancer, IIS web logs not showing true requester IPs

  - by Aszurom

  I have a Hercules vmware appliance, which is a micro-linux vm that runs the PEN daemon and acts as a server load-balancer. It takes any incoming request on the appliance's IP and routes it out to a number of alternate IPs. The logs of the daemon show the true IP of the browsers hitting the website. The logs of the websites themselves (iis 6 and 7) only show the requester IP as being that of the load balancer. The IT manager tells me that when we had a hardware appliance (serveriron XL) doing the load balancing, the web logs reflected the requester IPs accurately. Is there any way to get this resolved with the daemon, or will I be digging that out of the closet and plugging it back in?

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• Java version indicates SE 6, Java Control Panel SE 8

  - by Mariogs

  So I'm trying to get the Java 7 as the default version on my machine, running Mac OS X 10.9.3. When I run: java -version I get: java version "1.6.0_65" Java(TM) SE Runtime Environment (build 1.6.0_65-b14-462-11M4609) Java HotSpot(TM) 64-Bit Server VM (build 20.65-b04-462, mixed mode) When I run: javac -version I get: javac 1.6.0_65 When I go into System Preferences -- Java -- Update, I see: Your system has the recommended vesion of Java. Java 8 Update 05. I guess I have a few questions: 1) Why does my Java Control Panel claim I have Java 8, but my work in the terminal (when checking my Java version) says otherwise? 2) I just downloaded the .dmg file for Java SE 7 from Oracle's site and installed, though it's nowhere to be seen... Thanks for the help, Mariogs

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• How can I have Windows 8 go to the desktop by default?

  - by Schnapple

  I've played around a smidge with the Windows 8 Consumer Preview in a VirtualBox VM and I think the improvements under the hood may be worth tolerating the Metro UI crap. I don't like that the entire screen changes to something I don't care about when I hit the Windows key and start typing but I can deal with it. The one thing I cannot stand, though, is that it starts in the Metro interface by default. I have to hit the "Desktop" tile to get to a normal interface, and while I can hit "escape" to go back to the desktop and dismiss Metro, it doesn't work when you first log in. When you first log in, you have to hit that "Desktop" tile. I know that the Enterprise versions of Windows 8 will go to the desktop by default. I don't know but I would assume that there's probably some registry key that would handle this. Has anyone figured that out yet?

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• Ctrl-C not killing process in CMD.EXE

  - by jtl999

  I've had this issue for a while even after reinstalling. Issue happens after I reinstall all my programs and not in a fresh Windows install (obviously). Might have to spin up a VM and install each program 1 by 1. I suspect it's Git for Windows with it's mini Cygwin wrapper causing this issue. Anyway the issue is basically pressing Ctrl-C does not kill the running process. However when I run cmd.exe or Git Bash or administrator Ctrl-C works great again. Disabling UAC seems to break it again. I've made a video of the issue here. Many thanks.

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• Upgrading kernel on Debian server hosting Xen 3.2.1

  - by mitnosirrag

  I have a physical server running Debian 6 and Xen Hypervisor 3.2.1, and kernal -a says "2.6.26-1-xen-amd64". I have not updated for a long time, because when I run apt-get upgrade, one of the updates is linux-image-2.6-amd64. My understanding was that my kernel needs to have Xen support, will upgrading to this kernel break my dom0? I have myself up against a wall, because I host a VM for a website that isn't mine, so I need the latest security updates, but can't risk taking them offline. Eventually they will move off, and I won't be hosting something I am unqualified to host, but that isn't the point right now.

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