Xen is a hypervisor based virtualization. It supports x86, AMD64, IA64, ARM and other CPU types, and Linux, Windows, Solaris and *BSD guest operating systems.

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Cannot change date/time on virtualized centos install without a reboot

I have a dedicated web server which is running centos with xen virtualization that has centos installed on the vm. I do not have access to the parent server, I can only manipulate the vm, of which I ...
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37 views

Optimize monothreaded application under XEN

I have an single threaded application who uses 100% cpu on virtual machine under XEN. Adding more VCPU will not help. Is it possible to configure XEN VCPU in order to have better performance with ...
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2answers
303 views

fix kernel on Xen Server hypervisor vps

I have a cloud server hosted at Rackspace, and they use Xen Server hypervisor. I was running Ubuntu 12.04, and really messed up by attempting to do a release upgrade manually. The hypervisor ...
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1answer
165 views

XenServer xe CLI on OSX [closed]

Is there a port of the XenServer/XCP xe command-line tool to Mac OS X? Or, alternately, if this tool is open-source, what's the easiest way to get access to the source?
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1answer
294 views

Booting Ubuntu 12.10 guest on Debian 6.0.4 Xen with pygrub

I'm trying to run a Ubuntu 12.10 off a Debian 6.0.4 and Xen-4.0. I realised that pygrub might not be able to parse the menu.lst (I symlinked menu.lst to grub.cfg in /boot) and ended up with this ...
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1answer
66 views

Centos install in Xen problems

I'm running ubuntu 12.04.1, and I want to install CentOS 5 or 6 using network installation via http. Using xen images from http://mirror.centos.org/centos/5.7/os/x86_64/images/xen/ my config: ...
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0answers
151 views

nagios volatile service and system time change warning

I have a nagios service with volatile option on (executes event handler every time it encounters a non-ok hard state). Problem is that if the event handler executes for 2-3 times (that is the expected ...
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2answers
523 views

Strange Ubuntu boot up warning

I have a VM (Xen based), I can boot up the machine but there are some warning during the boot up. Are they normal? If not, how to solved? md: Scanned 0 and added 0 devices. ...
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1answer
98 views

Split management network from data in Xen Server

I'm working on configuring our existing pool of four hypervisors running XenServer 6.1 to use a separate management network. Currently the setup is a single link with a public address over which all ...
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1answer
146 views

Changing the mac address in a libvirt xml config file breaks network connectivity for the guest

I'm using Xen with libvirt and trying to set it up on a bridged interface. I am able to install an OS and everything works as I would expect. If I save the xml output from "virsh dumpxml guest", edit ...
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1answer
136 views

Network traffic is not being forwarded from a VM to the network using a bridged interface with Xen + libvirt

I'm having trouble getting network access from a VM that I'm running using Xen and libvirt. I've been trying different things and reading similar posts online for a couple of days but I'm really stuck ...
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2answers
6k views

How to get more I/O performance from Citrix XenServer?

I have a Citrix XenServer 6.1 installed on a HP Server (1x Intel Xeon E5630 @ 2.53GHz (4 cores, 8 threads, RAM: 752MB for dom0 and 55286MB for the guests). The server has 2 scsi mirrored disks and is ...
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3answers
571 views

Xen memory management on small server

I am currently running VMware vSphere 5 on a server I use for various projects. Mainly I use it for honing my skills with administration and running a few game servers. Recently I was considering a ...
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2answers
70 views

mount a partition on an lvm partition

I have a xen dom0 server (named virtserver), which contains a guest machine, let's call it "virtguest". The virtguest used to be a physical machine earlier, and the whole old disk (with several ...
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0answers
180 views

Xen hangs on boot when scrubbing RAM

I have a CentOS 5 server I can boot into the stock kernel just fine, but when I try kernel-xen, it gets stuck here: http://i.stack.imgur.com/wAI20.png When I try adding no-bootscrub to the kernel ...
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1answer
102 views

Error: Cannot find ramdisk “hd(0)/boot/grub/menu.lst”

I have a dom0 and try to run domU with config like this: kernel = '/root/xen/dist/install/usr/local/lib/xen/boot/pv-grub-x86_32.gz' ramdisk = 'hd(0)/boot/grub/menu.lst' vcpus = '2' ...
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2answers
129 views

Does Xen need an XServer for graphical display?

I'm trying to create a very small ISO, which is bootable and brings up a DomU such as Windows 7 using Xen. I want to setup the minimal number of packages in the small ISO, therefore I'm wondering if ...
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1answer
3k views

Can I safely uninstall “Citrix Tools for Virtual Machines”?

Having several virtual servers with Windows 2008 R2 at our web hoster (Germany's "1&1", they seem to use Citrix Xen), I have every now and then some servers that hang (RDP login screen hangs ...
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0answers
879 views

Nagios: check services being orphaned?

Recently I noticed that there are some warnings in the nagios.log: [1366060611] Warning: The check of service 'pt-deadlock-logger' on host 'xx' looks like it was orphaned (results never came back). ...
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2answers
555 views

How to reset root password CentOS (domU) hosted in Xen?

Need help on resetting root password of a CentOS which is a guess OS (domU) in XEN. I already tried to get to grub but it doesn't display or maybe using a different grub (pygrub). Thanks in advance.
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1answer
83 views

Setting up VPN on a VPS

I want set up a VPN in my Xen VPS with one static IP. What I should set in /etc/pptpd.conf as localip and remoteip. I followed this tutorial: ...
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0answers
265 views

Xen 4.2.1 dom0 boot hang

I'm having some issues with booting xen dom0. Initially I started out with Ubuntu 12.04 LTS server and compiled and installed xen 4.2.1. Unfortunately, the machine wouldn't boot but would show a ...
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1answer
196 views

ntpdate setting incorrect date after boot

I have a few Debian XEN virtual machines and upgraded them to wheezy(I need the 3.2 kernel for a project). Everything was okay until I rebooted on of the machines. My current problem is, that ntpdate ...
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1answer
228 views

Xen guest - cannot get network connection beyond the host

I've just installed a XenServer 6.1. It came with a standard configuration: network 0 connected to NIC 0. I created a VM but I can't reach any network beyond the host. From the VM (172.18.32.20), I ...
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1answer
167 views

Issues with Xen Kernel and Debian

My Xen installation has gone weird on me and I am trying to get back to normal. I overflowed the base partition and in my haste to delete unused files I think I deleted something important, so now ...
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55 views

Xen domU sees 35MB less than assigned

I am using ubuntu precise 12.04 and I am booting a paravirtualized ubuntu 12.04 domU, all being 64 bits. The VM has memory=1024 assigned and xentop at the host correctly shows 1024MB, but htop in the ...
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1answer
208 views

Migrate Windows XP to Xen HVM

I want to migrate a Windows XP machine to a Xen 4.1 HVM virtual machine with Windows XP installed (the custom software will only work with XP). The software is custom made, and needs to be migrated ...
3
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1answer
332 views

Use SSHFS on XenServer 6.1

On Xen Server 6.1, to backup my VMs, I use a script based on the following tools: xe vm-list to build a list of the VMs to backup xe vm-snapshot to take a snapshot of the VMs xe template-param-set ...
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2answers
2k views

CentOS 6 Xen guest fails to boot after 'yum update'. Kernel?

I Seem to be having an issue with a Xen guest not booting after a yum update. DomU Configuration: #kernel = '/boot/solus-vmlinuz' #ramdisk = '/boot/solus-initrd.img' bootloader = ...
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1answer
62 views

Always use Xen? [closed]

I'm installing the usual bunch of servers for general office stuff, a mixture of Windows/Sharepoint and Linux Since none of these need direct access to the hardware, fancy graphics or are really ...
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1answer
330 views

Unable to run libvirt with xen on Centos 6. Fails with ioctl 3166208

As per subject. Xen 4.2.1 libvirt 0.10.2-18.el6 Linux gatto.example.com 3.8.3-1.el6xen.x86_64 #1 SMP Sat Mar 16 15:16:57 EST 2013 x86_64 x86_64 x86_64 GNU/Linux I followed the instructions given ...
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26 views

start xen vm using cli, without creating configuration files

Is it possible to start virtal machine without creating configuration files? Only by specifying all configuration parameters through command line, like QEMU. Can you give some references or examples?
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1answer
249 views

Xen XCP: Route failover IP to Guest

I have two hosts, which I installed XCP 1.6 on. The machines are hosted at Hetzner. Each host currently has a public IP and an additional IP assigned. There is a guest on each of the hosts which ...
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1answer
360 views

Cannot give more than 32GB of RAM to a Debian squeeze under Xen 6.1

Under XEN 6.1, I tried to give a debian squeeze VM more than 32GB of RAM. But the Xen Center gave me this: "The amount of physical memory allocated to this VM is greater than the total memory of its ...
2
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1answer
415 views

Dom0 not forwarding to DomU

The situation: DomU: Debian SID /etc/network/interfaces auto eth0 iface eth0 inet static address x.x.x.55 gateway x.x.x.49 netmask 255.255.255.255 pointopoint x.x.x.49 Ping DomU -> x.x.x.49 ...
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2answers
490 views

Why does my server boot the old debian kernel?

I got a vServer with Debian installed (important because I have no idea of how Debian was installed and/or built). Output of ~# uname -r: 2.6.26-2-xen-amd64. After execution of (first some other ...
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3answers
289 views

hypervisor performance when running from USB

Just wondering if there is any performance impact / degradation when running from USB key I'm planning on using KVM or xen, since my servers doesn't have on board raid controller, I'm planning on ...
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1answer
206 views

Network Script broken with recent XEN update in Debian Squeeze

Today I applied the most recent xen update for Debian Squeeze from [Security]. The package version is now 4.0.1-5.8. After that, xend began to behave weird (aka. wrong): root@root:~# sudo service ...
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3answers
116 views

Is there any server virtualization software supports subdomains? [closed]

I installed openvz in my server but to create more virtual machines I need more than one ip address. But my service provider can only give one ip address for my server. Is there any software that ...
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4answers
2k views

Boot Clonezilla with XenServer VM

I'm currently trying to move a RHEL based server to Citrix XenServer (5.6) VM. My plan was to use Clonezilla LIVE CD, which i have had good suceess with to clone physical to physical before. So i ...
2
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1answer
313 views

Why is LVS dropping packets?

I am currently trying to get down to the core of a problem where my LVS-director seems to drop a packet coming from a client from time to time. We have this problem on our production systems and can ...
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2answers
467 views

Changing XEN VM configuration

What is the correct way to update a XEN VM configuration? In this case I want a specific domain to stop using /dev/emcpowerg and use /dev/emcpowerh in stead. I have ensured that the two devices have ...
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3answers
440 views

Why is Qemu Virtual CPU on my kvm guests [closed]

can some one please clarify this. I am new to kvm and created two guest instances one linux and one windows. On both Guests, CPU is showing as QEMU virtual CPU,why is it so? if kvm utilizes ...
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1answer
516 views

Install Ubuntu Desktop from ISO on XEN

I've got XEN Hypervisor running on Debian as my base system. I understand VNC and conceptually installing PV based systems on my hypervisor but I'm getting stuck starting from scratch on a ISO-based ...
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1answer
284 views

How do I change a xen vm storage from hda to sda?

I am trying to import an ovf appliance created for VMWare into our Xen infrastructure. The imported image uses hda rather than sda, and the appliance has some hard references that appear to be ...
2
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1answer
437 views

I can't mount a LVM snapshot on a XEN host

I'd like to backup my XEN VMs by copying-rsyncing a LVM snapshot. I'm trying to mount a snapshot that contains a XEN guest's virtual disk (ext4). Below are all the steps I follow. I can't mount the ...
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1answer
74 views

How to exit xen domu when using linux terminal

I usually use putty to connect on a xen domus. To exit domus after using "xm console", it's ctrl + 5 But how can I exit vm console on linux terminal?
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1answer
145 views

Best way to move one VPS from one provider to another? [closed]

I have a VPS server (Xen based) purchased from one provider, now I want to move the server to another (kvm based) What are the best way to do so? I really don't want to re-install the whole system, ...
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0answers
53 views

Domus Memory Used Issue With Xen On CentOS

Anyone know why I'm receiving this error? I compiled latest libvirt from source, I also tried with various rpm. I would like to get memory used by domus and it looks like it's not working with Xen 3 ...
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1answer
332 views

How do I transfer a Windows XP/Vista/7 partition into Xen?

Good morning Server Fault, I have several hard disks with installations of Windows XP, Vista, and 7. I do not want to (or rather can no longer) reinstall these Windows installations so I want to ...