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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144 views

Network filtering with libvirt + xen + bridge + nat?

How can I properly add basic network filters (clean-traffic or, at least, ip-spoofing prevention) to XEN (xend) guests managed by libvirt? Or, in particular, can I manually execute libvirt's ...
0
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1answer
154 views

After running for approx. 2 days, IIS FTP refuses to connect

Background: Windows Server 2008 R2 64 bit, running inside Xen 6.1. Updated to the latest Xen Citrix Tools for Windows. Disabled IPv6. Currently trying to resolve the following: IIS FTP server ...
4
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2answers
275 views

Why is domU faster than dom0 on IO?

I have installed debian 7 on a physical machine. This is the configuration of the machine: 3 hard drives using RAID 5 Strip element size: 1M Read policy: Adaptive read ahead Write policy: Write ...
16
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4answers
1k views

What are the benefits of “enterprise-level” virtualization?

For a company with modest virtualization needs - VirtualBox is currently doing fine at hosting a few light servers - what would some of the benefits be of moving to a more robust platform? I'm ...
0
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1answer
342 views

Xen.org Master/Slave in a pool with HA-Lizard

I have a pool of 3 servers with XCP only, each with 1 VM running on them, and managing them through XenCenter. Since the opensource version of xen does not have support for HA, I am using HA-lizard, ...
0
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0answers
62 views

Xen Debian VM and NFS

I have 2 servers in a pool running a single VM on each server. I just got xencenter running so I am managing through that. I want to have a shared storage (NFS) between the two of them, so that if one ...
1
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1answer
302 views

RAID1 LVM, XEN and flashcache

I am regarding to question: Improving IO with FlashCache I have setup a RAID1 (/dev/md0) LVM (*/dev/vg_xen*) and executed following command: flashcache_create -p thru flashcache0 /dev/sdc /dev/md0 ...
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2answers
2k views

Determine which guest is running on XEN: HVM or PV guest

I'm working with a Xen host which is installed XenServer from Citrix by someone. He already installed a lot of CentOS 5.2 guests on the host. I wonder how to check those guests to know they are PV ...
0
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1answer
146 views

Xen hvc0 console size

Hello I got a Xen running using hvc0 for the guests. Everything works fine except for the size (lines and rows) of the console: It's always 80x25 what makes editing awkward sometimes. If the line one ...
0
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0answers
154 views

Why does Xen fail to create domUs/start the virtual network interface?

I have received two errors while trying to create a new domU on Xen. First, I received this error: Unable to complete install: 'POST operation failed: xend_post: error from xen daemon: (xend.err ...
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0answers
63 views

How to move a template from one xen nfs storage repository to another?

I have a bunch of templates on an NFS XCP 1.6 storage repository using thin provisioning for some of my VMs. I want to move the template's disks to a different NFS storage repository. There doesn't ...
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2answers
787 views

Xen: synchronizing time with Dom0

I have Xen virtual machines running on Debian 6 (both Dom0 and DomU). I would like to synchronize clock on DomU with Dom0. On http://wiki.xen.org/wiki/Xen_FAQ_DomU I have read that I need to set ...
0
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1answer
78 views

Add OpenStack Compute to existing Xen based server

I have an existing server running Cenos 6.x with Xen 4.x and a dozen or so virtual machines. I'm building out an OpenStack environment and was wondering if is possible to install OpenStack compute on ...
0
votes
1answer
443 views

Grub can't find Xen multiboot file

I am running Debian Wheezy on a software RAID 0 with LVM. I'm trying to get Xen to work but grub refuses to boot in it. I installed Xen by following the instructions here: http://wiki.debian.org/Xen ...
1
vote
1answer
659 views

Creation of Xen VM fails with Error: Creating domain failed: name=buildbox03

Since a few hours, my xen VM does not want to be created. The VM is quite unstable so I need to destroy and create is quite often. This morning I was able to do such a destroy-create cycle. A few ...
1
vote
1answer
864 views

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 ...
0
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0answers
39 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 ...
1
vote
2answers
321 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 ...
0
votes
1answer
182 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?
1
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1answer
350 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 ...
1
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1answer
68 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: ...
0
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0answers
184 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 ...
0
votes
2answers
629 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. ...
0
votes
1answer
104 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 ...
1
vote
1answer
205 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 ...
1
vote
1answer
155 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 ...
1
vote
2answers
7k 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 ...
2
votes
3answers
700 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 ...
1
vote
2answers
73 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 ...
1
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0answers
219 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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votes
1answer
116 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
157 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 ...
4
votes
1answer
4k 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
1k 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). ...
0
votes
2answers
719 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.
0
votes
1answer
87 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: ...
0
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0answers
303 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 ...
1
vote
1answer
229 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 ...
0
votes
1answer
299 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 ...
0
votes
1answer
197 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 ...
0
votes
1answer
60 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 ...
0
votes
1answer
226 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
votes
1answer
371 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 ...
0
votes
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 = ...
1
vote
1answer
64 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 ...
0
votes
1answer
370 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 ...
0
votes
1answer
28 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?
1
vote
1answer
279 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 ...
0
votes
1answer
414 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
votes
1answer
460 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 ...