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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Apply Hotfix/Update in Xen Center

I noticed that hotfix XS65ESP1013 was just issues for xenserver 6.5. I want to apply the update through Xen Center, NOT CLI. What are the proper steps for updating through xen center? I currently ...
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169 views

How to create bridged network interface for Xen?

I'm trying to use Xen on an Ubuntu server for the first time and have a really basic question. I'm following the guide in the Ubuntu docs and under the Network Configuration->Using bridge-utils ...
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xen-hypervisor-4.4 doesn't show log timestamps

I'm trying to debug some performance problems with a recently updated xen (from 3 to 4.4) and I realized that with the old XEND toolstack I had a log file in var/log/xen/xend.log with timestamps and ...
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1answer
60 views

Persist OVS mirroring on Xen reboot

I'm running Xen on Debian with five guest VM:s. I've used the following command to setup port mirroring to two of the VM:s ovs-vsctl \ -- --id=@m1 create mirror name=detector \ -- add bridge ...
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1answer
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“soft lockup - CPU# 0 stuck for ” after xen install on Ubuntu Server

I finally managed to install xen-hypervisor-amd64 on an Ubuntu 15.04 Server and I rebooted fine, but after a few minutes after a restart, the console starts outputting these messages soft lockup - CPU#...
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What is the value shown for memory graph in XenCenter?

I would like to ask question to people in this community about Xen Center. I use Xen 6.5 in production environment. However, I quite don't understand the value shown in memory graph of "Performance" ...
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38 views

xe vm-disk-list >Error Multiple matches VMs found

Dell equallogic on XEN_VERSION='4.1.3' storage size 2tb usage 96% toal virt. alloc. 500gb there is only one snap shot for each vm I dont know who consumed the space? xe vm-disk-list >Error ...
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105 views

How to backup Xen virtual machine using XL toolstack?

My server is running several virtual machines using Xen with XL toolstack. Each virtual machine uses an image file as a disk device. If I just copy these image files, there is a high possibility of ...
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63 views

Xen bridge - block traffic from port range - iptables / ebtables

I use Xen with bridge interface : - eth0 - viifbr0 - Name of VM interface : vifv10XX.0 Do you know if it is possible to block output traffic from source port range for a domU please ? If yes, can ...
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1answer
84 views

Libvirt with Xen fails to start correctly Ubuntu 14.04

At the moment i'M really feeling a little helpless: I tried to setup Ubuntu 14.04 with Xen and libvirt for management. I created a VM but I did not auto-start (altough autostart is checked). If I do ...
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803 views

xenserver - xe-toolstack restart - i lost connection from xencenter

After Xencenter-toolstack restart i lost connection from xencenter I try to restart using ssh - putty following message is showing and i lost the browser access also ............ All xe ...
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53 views

Xenserver networking in VirtualBox not working for DomU

I am trying to understand if/how unikernels work, using HaLVM and MirageOS and in order to experiment with those tools I have setup a XenServer virtual machine inside a VirtualBox on my Mac. ...
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148 views

Xenserver 6.5 High Availability

I'm running xenserver 6.5 and I just configured high availability. I noticed that there is the option for start order. Is there a best practice for start order when it comes to HA? Obviously the more ...
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4answers
151 views

Xen - reduce resources/hardware limitation?

After I chose a Xen VPS provider, they said me that Xen doesn't let them downgrade resources/hardware so, because of this I can't downgrade my plan. I think that this limitation is strange... Can you ...
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76 views

Xackup Backup Type for Xen Server 6.5

I'm running the Xackup trial and started backing up a few linux and windows VM's. I selected disk and memory state as the type of backup. Everything ran fine and backed up ok. When I went to edit ...
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1answer
47 views

Create something like Citrix XenDesktop using Xen [closed]

I am doing an academic project. I want to deploy a Virtual Desktop Infrastructure for my college. So, is there any way/guideline to make something like XenDesktop using Xen on a Linux Distro from ...
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45 views

NAUbackup features + Snapshots

Does anybody know whether or not NAUbackup captures the memory of a vm, along with the disk, when it takes a snapshot? I'm running xenserver 6.5 on three blade servers and I setup NAUbackup to backup ...
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1answer
305 views

Change Xenserver 6.5 MTU

How do I go about change the MTU setting for my management interface in xenserver 6.5? Right now its set to the default 1500 but I want to increase it to 9000. For my setup I have 2 nics on each host ...
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22 views

Xen hypervisor randomly shuts down machines

We have got an ubuntu 14.04 LTS server with XEN software installed. Everything worked fine untill a day ago a Windows server stopped working (Windows server 2012) Now it's shuts down every 30 minutes ...
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Citrix Xenserver Service Account Issues

I'm trying to create an account with citrix xenserver so I can post questions on their boards and also get notifications for updates. I filled out the necessary info and I get an email saying an ...
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52 views

Start xend service automatically on boot fails

I am trying to auto-start xend and xendomain service automatically on boot as soon as I log into XEN-dom0 (on Ubuntu server 12.04 x64) so that whey i type : sudo xm list the hypervisor lists me all ...
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2answers
1k views

How to Run Updates Xenserver 6.5 Free Edition

I recently installed the free version of xenserver 6.5. Right now I can run updates through xencenter which is simple and easy. I've been reading though and I've come across a few articles mentioning ...
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1answer
30 views

Xen routing from VM-bridge-eth1 to cable to eth2-bridge-VM

I have a Debian server running Xen 4.4. The server has multiple ethernet interfaces. I would like to set up: vm1 (IP 10.1.1.2/24) <--> xenbr1 (IP 10.1.1.1/24) <--> eth1 vm2 (IP 10.1.2.2/24) &...
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After copying Xen DomU to another machine, all network config in Windows is lost

Background Our company have about 40 Xen domains installed on single server, installed and managed by suite of proprietary programs. Most of the virtual servers are managed by our customers, and we ...
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105 views

xend is not found - Xen 4.5 on Odroid XU3 ARM

I am trying to set up Xen virtualization on Odroid XU3 ARM platform. I have done all steps from http://forum.odroid.com/viewtopic.php?f=98&t=6643 to be able to boot into Odroid XU3 with ...
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CRITICAL STRUCTURE CORRUPTION on Windows Server 2012 R2

I have a Windows Server 2012 R2 virtual machine; yes with all the updates. Additional software include Microsoft SQL Server 2014 (was 2012 on a previous VM). The web hosting company includes xenpci....
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44 views

Acquire XEN guest memory image over network

I am trying to dump a memory image from a XEN guest (Ubuntu 12.04 x64 - domU) in order to analyze it on dom0 (Ubuntu server 12.04 x64) with volatility and find some information about the guest virtual ...
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72 views

How to block network connections between XenServer VMs using Open vSwitch?

I would like to block all network access between user VMs on a XenServer host so that users on each VM are unable to access any other user VM, or to sniff network traffic, no matter what. However I ...
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2answers
244 views

Slow writes for VM in Xen?

I have a server running Xen and a couple of VMs. I'm trying to set up a RAID array that's dedicated to one of the VMs in particular, which will be used for various storage-intensive purposes. ...
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364 views

Creating a XenServer VM from the Command-line

I have an issue in which I cannot understand how to create a XenServer Virtual Machine from the command-line. I have installed XenServer on an unused Tower unit, and currently SSH into it from my Mac....
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1answer
2k views

CentOS 7 on XenServer 6.5

I am having problem trying to get CentOS 7 Graphical installer to work on XenServer 6.5 (Service pack 1). I have used CentOS 7 template. Graphical installer does not work, getting blank screen with ...
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Xen based AMI does not boot (/dev/xvda)

Trying to create an AMI Instance Store within a xen based guest (VM: CentOS 6.6, 32 bit, PV). 'ec2-bundle-vol' only accepts /dev/xvda1 as a valid block device. If device entries are modified in /etc/...
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1k views

Change Xenserver 6.5 Pool Master

I'm looking to change the pool master because my current pool master is having some hardware issues. I've disabled HA and I came across this script to change the pool master to my other server: xe ...
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1answer
345 views

Debian Jessie not picking up xen virtual framebuffer

I have a Xen 4.1 installation on Debian Wheezy, administered through xm. When I boot a Jessie DomU I get output on the emulated VGA card / VNC display only for the first few seconds of boot, then it ...
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65 views

How does EC2 signal a reboot to an HVM instance?

What is the exact signal being sent? How can the instance (Linux in this case) handle it?
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421 views

XENSERVER - PCI: Fatal: No config space access function found

We use XenServer to host our VPS and when we tried rebooting the server we get the following error right away PCI: Fatal: No config space access function found We need to edit the grub file for the ...
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1answer
253 views

Use graphical DomU (X11 for Linux, regular UI for Windows) from Dom0 without any GUI on Dom0

I am creating a Xen (para)virtualization setup, with two DomU's: a Windows 10 client install, on HVM, and an Linux client install with X11, on PV. Dom0 is a non-graphical Debian install. So far I have ...
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20 views

If XEN can convert my installed OS to guest OS? [closed]

Need to run multiple OS (Windows 7, Ubuntu 14.04, 12.04). Never use XEN before. Just want to check: Does XEN have to be installed on top of some OS? Can it be installed directory on a fresh computer ...
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13 views

Determining what type of virtualisation used on VPS/VDS? [duplicate]

I bought VPS/VDS and want to know what virtualization used. I have a root prompt in Debian Linux.
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2answers
234 views

How to upgrade Xen with minimal risk and downtime?

I've recently noticed that one of my server is running on a pretty old version of Xen: $ dpkg-query -l | grep xen ii libc6-xen 2.11.3-4 Embedded GNU C ...
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16 views

How to check what is the default NIC on a Xen guest?

A VM running on a Xen is getting buggy. Some VM lost their network connection sometimes. I've identified an error on the ping command: $ ping 8.8.8.8 PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data. ...
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2answers
259 views

Forward Port on Guest Operating system With Libvirt

I am currently running a Xen Hypervisor underneath Ubuntu 14.04. On the host machine I am running a guest VM. From what I understand, In order to be able to receive incoming connections on the ...
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1answer
300 views

How to diagnostic internet access failure on a linux system?

I have a VM running on Xen. The virtual machine was running fine for months and suddently the network access broke down. Dom0 DomU .-------. bridge .-------....
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81 views

Booting CentOS7 on Xen 3.1.6: upgrading Xen best path forward?

I'm running into problems booting CentOS 7 on Xen 3.1.6: Here is the error: [root@vh1 ~]# xm create vm-app-em5-test Using config file "/etc/xen/vm-app-em5-test". Traceback (most recent call last): ...
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53 views

How are the Debian/Ubuntu Xen netinstall images built?

Xen/XenServer has this nice feature where you can select a Debian or Ubuntu template and point it at some mirror and it will go and download a minimal kernel and initrd which will be used to bootstrap ...
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22 views

Checking for disk failures and issues in a VM

If you host with a provider who runs a RAID 10 or another RAID based system and your in a VM. Are you able to check for disk failures or RAID failures from within the VM or does it require host based ...
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156 views

How to get output 'xentop' or 'xm top' command in centOS

I would like to develop shell script by 'xmtop' or 'xm top' command get output in same format or just show on command line like, top -c, w .
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76 views

Routing issues with bonded VLAN trunk bridged to Xen dom0 on CentOS

I am setting up a new dom0 which has a LACP bond. Connectivity is fine between the network, dom0 and domU's without the trunk enabled. Once I start tagging traffic on the switch and add the ...
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1answer
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XEN Server NFS SR read only

We have two Boxes running XEN XCP. One SR is located on an FreeNAS 9 NFS share. For some reason the NFS share turned read only which is pretty bad for one VM whose VDIs are located on the NFS SR. I ...
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1answer
23 views

Is it possible to transfer OpenVZ VPS image to XEN platform?

I'm having a memory related issue with my vps on openvz platform and I guess that my hosting provider is overselling RAM. So, I'm thinking to move on a xen platform since ram cannot be oversold but I ...