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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How can I create a simple virtualization solution with one Computer which can be later extended with additional computers for HA [on hold]

We are currently deploying a new LAMP server I would like to use virtualization ( additional virtual machines will be probably created later also running linux but not only lamp ). Because of low ...
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10 views

Force the GPL/PV driver to a lower link speed

I'm running Xen 4.4.0 on Ubuntu 14.04. On this Dom0 I am running: 1 DomU Ubuntu 14.04 with Shorewall 1 DomU Windows Web Server 2008 R2 with GPL/PV drivers Both domUs connect to the same bridge ...
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19 views

xen server iso local storage

I'm unsure as to how I would go about this but here goes. I'm trying to create a local repository for ISO images on a xenserver. I have two hard drives that are mirrored that I told xenserver to ...
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11 views

What problems arise if user-space drbd is older than the kernel module?

Since more than five years I am using XEN in a productive environment. My constellation: SLES11 (included: OpenSource XEN 4.x), DRBD 8.3 in primary/secondary mode. Now I would have loved to go away ...
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53 views

Xen / libvirt - “End of file while reading data: Input/output error” when attempting to start a domain

I'm getting the following string of errors when I attempt to start a domain using virsh: virsh # start vimes error: Failed to start domain vimes error: End of file while reading data: Input/output ...
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21 views

xen server windows template sysprep Autounattend

Got a Xen Server Template Windows 2008 R2, thats had alot of things already set (disk size, server manager disabled etc, etc) We spin up, windows patch host and re-run sysprep My question is, can ...
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16 views

(Testing purpose) Using a Xen VM image, unconverted, in other virtualization platform (e.g. QEMU, virtualbox)?

I've set up a Xenserver and a Centos VM for my own testing. The physical machine is old hardware and therefore quite slow, but for some reason I would like to test the VM in the Xenserver platform. ...
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59 views

framebuffer loads under Linux, but not Xen

I recently built a Debian "Wheezy" system, which booted via GRUB to a non-framebuffer console, printing Console: colour VGA+ 80x25 during boot. To /etc/default/grub I added GRUB_GFXMODE=1920x1200 ...
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60 views

How do I get the system-serial-number for Xen Server?

I would like to find out how could I be able to retrieve the system-serial-number of virtual machines installed on Citrix XenServer. I had referred to ...
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1answer
36 views

xenserver ISO library

I am trying to create ISO repository with this guide: http://kb.softescu.ro/server-administration/linux-server-administration/how-to-create-a-local-iso-storage-repository-on-citrix-xenserver/ ("Inside ...
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26 views

How do I increase the swap size on a xen guest machine using xm?

I'm attempting to increase the amount of swap on a xen guest machine. At first I thought it'd be similar to increasing the hard drive space, which I do like this: cd /srv/xen/domains/$host/ xm ...
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93 views

Xen 4.4 mixed routed/bridged network vm does not work

I have updated one of my servers from Xen 4.1.4 (Debian squeeze) to Xen 4.4.1 (Debian jessie). As xend/xm is deprecated I would like to use the xl tool kit with Xen 4.4.1. But now I have issues with ...
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1answer
42 views

How to expose DomU's to router network?

I currently have a server connected to a router through a single NIC. The server has a running XEN setup with several DomU's. Everything seems to work fine, I can access internet from both Dom0 and ...
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1answer
15 views

Adding “VMs by Software Product” to XenCenter's view menu

XenCenter has a "VMs by Operating System" dropdown menu. I would like to have a similar menu "VMs by Software Product" which displays VMs grouped by certain software products and releases. Each of ...
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1answer
62 views

What is causing `skb rides the rocket` errors?

On one of our busy (virtual) Debian 6 servers we are seeing a lot of messages in the syslog like this: kernel: xen_netfront: xennet: skb rides the rocket: 19 slots We are seeing some connectivity ...
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28 views

Difficulty sharing physical ethernet device with Xen 4.4

I have a virtualized PowerEdge T320, with a Ubuntu Server 14.04 running Xen 4.4 as host, that I use at my lab to do scientific computations (I'm the admin of the machine). This server has two physical ...
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63 views

External USB drive on xen windows guest

I have an external USB 2Tb drive I'm trying to use with a xen guest. Xen Center 6.1 sees the drive in the removable storage repository and I can assign it to a guest. But the guest (tested ...
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15 views

xen routed setup, no internet connectivity in domU

My server has 4 public ips, but I have 5 vms running, the vm which doesn't have an own public ip should be able to reach the internet and all other vms over private interfaces. I configured a private ...
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36 views

Using Xenlight with libvirt in debian, Unable to configure listen with remote libvirt

I am using libvirt 1.2.0 with xen hypervisor 4.4 in debian server. I am facing error when I try to connect remotely with other libvirt using TCP or TLS. I couldnt make libvirt to listen to the port. I ...
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29 views

fdisk -l do not detect device accessed using iscsi o XEN virtual machine

I am experiancing an issue in accessing the iscsi target in VMs created on XEN hypervisor. I have used Suse 11 SP3 to configure this. After discovering the iscsi targets from VM , I am able to view ...
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34 views

Xen VM could not be installed

I have rented a server from Hetzner. I have installed Xen on Dom 0 - Centos 6.5. I couldn't create a Dom1 Centos 6.5 VM. The Error I see is 'Unable to retrieve 'the link for centos image' while ...
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65 views

Can no longer add VMs on Xen/DRBD/Pacemaker Cluster

OS: Debian 7.3 & 7.6 Problem: Every attempt to manipulate (create, migrate or even list) the VM's with virsh causes this "Failed to get host power capabilities" warning. I manage a standalone ...
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1answer
45 views

How to know the real amount of RAM in a VPS

I've been told that a VPS's RAM can be manipulated (oversold) by VPS providers. I know I can always buy a VPS from a reputable company, but, really, how can one make sure the allocated memory is the ...
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58 views

How to boot xen dom0 with UEFI support?

I boot my system with EFI+grub2. If I boot into a normal system, I can modprobe efivars and view all the efi variables. But if I boot into xen, I cannot see the efi variables from my dom0. I build my ...
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165 views

Cannot create windows HVM with SDL in xen 4.4.1

I want to create a win HVM, and set sdl=1. I was able to do so. But after I upgraded to xen-4.4.1, I got this error libxl: error: libxl_dm.c:1371:device_model_spawn_outcome: domain 4 device model: ...
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33 views

Xen memory management

In real machine, I can reserve a certain of memory by editing grub to limit memory,which the machine can use, and then mapping the reserved memory using ioreamp. I can manage these memory and insert ...
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73 views

VGA passthrough grabs wrong device

I've succesfully set up VGA passthrough with a Quadro 4000 and everything is working great. My motherboard is a SuperMicro H8DGi/F with 2x opterons 6140, an onboard Matrox G200 and a discrete Quadro ...
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1answer
186 views

host only network xen 4.4

I have one IP address (ipv4) and I am trying to install a domU (debian stable) on a dom0 which runs the latest xen 4.4.1 on debian testing. I have created xenbr0 bridge and it is mapped to my eth0. ...
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50 views

create parition for xen with lvm on raid-1

First I don't have any experience creating xen, lvm and RAID-1 server, thus after several reading I stumbled upon this ubuntu documentation to install xen. BUT, because in the documentation it ...
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49 views

XEN virtual machine with IPv6 but without IPv4

How should I create a new virtual machine using xen-create-image if I just got the IPv6 from my hoster? When I tried xen-create-image --hostname=s1.example.com --size=70Gb --swap=8Gb ...
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Monitor outbound SMTP Xen node

Using Xen-PV on one of our nodes, looking for some suggestions on how I can monitor anyone sending mass outbound emails. May be using Tcpdump?
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49 views

Xen cannot see all the LUNs in ISCSI HP StorageWorks MSA2312i Dual Controller Modular Smart Array

I have a HP StorageWorks MSA2312i Dual Controller Modular Smart Array and a second enclosure. I have four vdisks: vd01 (RAID5) (Current Owner A) vd02 (RAID5) (Current Owner B) vd03 (RAID10) ...
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59 views

Migrate from xl to xe (xapi) tool stack

I have a Ubuntu 12.04 machine with running XEN 4.1 currently i'm using xl as tool stack i want use xe (xcp-xapi) see has more options. I have several .cfg files each holds the settiong to create a ...
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1answer
2k views

Xen lvm resize2fs: Bad magic number in super-block

First of all i have to say i've been looking through lots of posts very similar to what i have but none could solve my problem... In my xen server i use 5 lvm disks per virtual machine: /boot / ...
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1answer
58 views

Can I configure IO error proof Linux on virtualized environment? [closed]

I believe everyone who are working on virtualized environment like Xen has experienced some sort of IO problems which lead to read only mode for guest machine. We experience same issue couple of times ...
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1answer
62 views

auto remount read only filesystem

We have an Ubuntu Server 12.04 LTS running on Xen. I believe we had a disk problem and Ubuntu switched to read only mode for partition "/". However the disk problem was just for a second and other ...
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238 views

Weird Phusion+nginx spawning delay error

We are trying to migrate an application written on REE from cloud provider A to cloud provider B. The application code, VM specs and operating systems are the same. The basic difference is that cloud ...
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1answer
186 views

Why Linux guest VMs performs better than Windows ones in terms of network?

I am testing the network performance of VMs in Xen and Hyper-V using Iperf and Netperf. In both hypervisors I found a Linux guest VM in different modes is having a relatively high performance than a ...
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1answer
235 views

New XEN Server, Intel i7, Errors were encountered while processing: xen-linux-system-amd64

I have just got a new machine to run XEN VM's on, it has an Intel i7 processor: - Intel Haswell Core i7-4790 3.6GHz 8MB LGA1150 Update [Screencast of what I am doing - ...
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1answer
631 views

Xen Vif creation xl vs xm

Hi everyone, I switch my server from a xend/xm Xen install to a 4.1 xl Xen install. Therefore Xen does not create vif network interface when I launch xl create /etc/xen/my_server.cfg but does create ...
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2answers
440 views

Linux xen directly boot windows domu?

I have the following situation: got a new notebook with Windows7 pre-installed (sda1 with boot partition, actual OS in sda2), one physical disk (sda) created an extended partition (sda3), inside ...
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1k views

xen:balloon: reserve_additional_memory: add_memory() failed: -17

We're running Ubuntu 14.04 on an EC2 virtual machine. I've been seeing a lot of these errors in our kernel log: [ 704.032085] xen:balloon: reserve_additional_memory: add_memory() failed: -17 [ ...
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1answer
63 views

booting straight into xen VM

I have a need to convert a bare-metal machine to a virtual-machine (via VMware converter). This part has been done successfully. I have then been asked to convert the vmware image to a XEN hvm. The ...
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2answers
124 views

Xen PV, Xen HVM and KVM

Am I correct that you can boot up any operating system with either of these virtualization types as they act as a bare metal machine and compile your own kernel? I am looking to switch over from ...
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122 views

InfiniBand RDMA latency test on Xen's dom0 crashes

The short story: while setting up InfiniBand connection between two servers, I cannot complete the RDMA latency test. It crashes even with breaking the ssh connection. The long story. The first ...
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361 views

XenCenter no OS boot parameters field

I just recognized, that 2 of my 10 VMs in XenCenter have a slightly different properties window. In these two VMs I cannot set OS boot parameters, because in the window I can only set the boot order. ...
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1answer
141 views

Dedicated Server and SolusVM with Xen

I have just setup a new SolusVM Xen Node at my DC. The server is colocated there, it's owned by me. It was in Florida working perfectly as an OpenVZ node two days before. It was taken offline and sent ...
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84 views

RAID 10 and LVM

I have just setup a new SolusVM Xen Node at my DC. I asked them to install CentOS6 with Software RAID 10 and 100GB to root then the remainder to an LVM group for Xen. All in Software RAID 10. The ...
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1answer
1k views

Moving LVM volume group from one physical disk onto another

I'm an out-of-my-depth PHP developer who has to deal with the following sysadmin problem, pronto. We have an Ubuntu (Ubuntu 14.04.1 LTS) server run Xen (xen-hypervisor-4.4-amd64 4.4.0-0ubuntu5.1). ...
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BUG: soft lockup - CPU#0 stuck for 23s! on XEN PV debian related to high i/o load

i am currently experiencing some problems with my Debian Xen System. It runns on an old opteron System with two Dual Core AMD Opteron(tm) Processor 275 CPUs. I am using image files (block devices) ...