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 to make paravirtualized xen template

I want to know how to make my own linux OS (CentOS, Fedora, Debian, Ubuntu, Gentoo, Slackware) template compatible with paravirtualized xen with pygrub kernel, ext4 filesystem and xvida device I ...
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How to start PV Xen Guest

I am new in Xen virtualization system and i am trying to learn everything about it so i can use it instead of Openvz In Openvz i can start and stop vps by running vzctl start <VID> vzctl ...
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23 views

Verifying VT-D / IOMMU Support (VGA Passthrough)

I have a 4790K I'd like to use VT-D with for hardware acceleration in a Windows guest VM (Dom0 = Ubuntu 14.04) using Xen. Intel's website CLAIMS the processor supports this: "Intel® Virtualization ...
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9 views

Setting up bridge for domU to be accessed from external network(internet)

I am trying to setup virtual guests(PV) using xen 4.4 (xen-tools) on debian 8.3. Problem is that I fail to configure bridge properly I guess ^^. I have setup an interface xenbr0 that uses same IP ad ...
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Xen VGA passthrough w/ XEN_PCIDEV_BACKEND kernel option

Xen's webpage ( http://wiki.xenproject.org/wiki/Xen_VGA_Passthrough ) says this is a requirement for VGA passtrough: "dom0 Linux kernel needs "XEN_PCIDEV_BACKEND" option enabled." I'm running ...
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1answer
42 views

Running a Linux docker container inside a Windows Server provisioned through Xen on CentOS (Can it be done?)

How do you properly propagate VT-X through physical hardware into a server provisioned via Xen so that virtualized docker can be run inside the virtual Windows server? L0 is Xen running inside ...
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35 views

XEN 4.6 + Centos7 dom0: boot sequence not shown

As per subject, when the machine is booted in the Xen environment, the screen blanks until the login: prompt is shown. Booting a vanilla kernel results in the usual screen output. Advice? Cheers ...
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Xen domain windows 2012 r2 - cant add usb

I have xen 4.4.3-9.el6 on CentOS: 6.7 (Final) Problem is I cant add usb devices to my windows 2012R2 domain; If I usexm usb-add demo_win2012_r2 host:0529:0620: I can see my device in windows but it ...
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1answer
49 views

Handling /etc/fstab when upgrading linode from Xen to KVM

I have a linode that is currently on one of Linode's Xen servers. I see that I am eligible to upgrade to a KVM linode. One thing that concerns me is that Linode's upgrade guide says block devices ...
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Xen networking - dom0 receives ARP requests but no reachability

Both dom0 and domU are Debian 8. Dom0 network configuration is: auto xenbr0 iface xenbr0 inet manual bridge_ports eth1 bridge_stp off bridge_waitport 0 bridge_fd 0 auto xenbr0.4 ...
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XEN VPS wrong memory?

I ordered a VPS on XEN platform with 1 GB of memory. CentOS 6.6 uname -a Linux vps 2.6.32-504.23.4.el6.x86_64 #1 SMP Tue Jun 9 20:57:37 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux I checked the ...
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36 views

Unable to get a xen vnc console on centos7

On a xen Centos 7 domU, I am unable to get a vnc console on xvc0. According to the documentation I have seen, this should occur automatically. What I see is anything but - console stays on hvc0. ...
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100 views

Getting “Too many slots” messages on CentOS 7 running as a domU

I have some CentOS 7 guests (domU) running on some CentOS 5 + Xen 3.0 hosts (dom0). I'm seeing a lot of this in dmesg and /var/log/messages: Dec 11 13:33:50 appsrv01 kernel: net eth1: Too many ...
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36 views

Manage KVM and or XEN Server from Windows

I cant seem to find a way to mange my KVM and XEN Server from a Windows machine. Is there really no way except a remote desktop connection?
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Xen Vcpus State

hprvsr1 ~ # xl list Name ID Mem VCPUs State Time(s) Domain-0 0 1024 1 r----- 15.6 hprvsr1 ~ # xl ...
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1answer
20 views

OpenSUSE Xen installlation is not in Grub 2

I'm sorry if this is a duplicate but somehow serverfault search action didn't work with my browser. I have a functional recent OpenSUSE Tumbleweed installation and I want to turn it into a ...
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1answer
19 views

XenServer - Removing Blade Server from Chassis

I've got to remove one of our PowerEdge M620 blade servers from our M1000e Chassis server to look at the hardware on the server, mainly the mezzanine card installed. Will removing the blade server ...
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24 views

How can I track security issues with running kernel under paravirtualisation?

I've got a bunch of client's virtual machines running by various providers who use Xen paravirtualisation. Almost all of these are Debian or Debian based systems. I rely on APT pretty heavily to ...
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1answer
50 views

Enabling Nesting for Xen-in-Xen via Libvirt xml

I'm trying to get nested Xen-In-Xen via libvirt. Can someone confirm that adding hap and nestedhvm to the features element in the domU xml config is what is required to get nesting working? Am I ...
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15 views

KVM vs XEN PV - which might have higher Server Load [duplicate]

I am wondering KVM vs XEN PV which will create higher server load (From Host perspective). In simple words, if identical VM's ( Linux variant) runs on a KVM based node and XEN PV based node which ...
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41 views

Enable SNMP XenServer 6.5

I want to enable snmp on my servers running xenserver 6.5. I've found a few articles with instructions to do so and the whole process seems pretty straight forward but my question is this - is there ...
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1answer
39 views

Backing up Xen Guests from dom0 with disk image file

I have a Xen server dom0 with a number of guests installed and am struggling to find an easy way to manage backups from the dom0 side. Guest scripts: Of course I could run backup scripts on each of ...
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20 views

Shared storage for Xen based cluster that allows I/O control

I am looking for a solution that will allow me to control I/O usage for my home Xen based cluster. Basically what I need is a way to limit or scale domUs (VMs) disk throughput. E.g. setup: - VM1 ...
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25 views

Effects of Third Party tools on Hypervisor Performance

I am using XEN for managing and introspection of VM's. I used DRAKVUF for sake of introspection. XEN provide built in tools for managing VM's. But I want to use LibVIRT for management. I want to know ...
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Get direct block addresses - Sleuth kit - XEN

I am using sleuth kit library in order to write an introspection tool for XEN hypervisor and my question is if we have the inode number of a file on a disk [ guest VM - ext4 filesystem], for example ...
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42 views

Ubuntu LDAP and NFS directory permissions

I have an issue with NFS and directory permissions using LDAP. Users that are members of a certain group cannot access a directory owned by that group (it works fine without NFS). They can access ...
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2answers
43 views

wget only works when tcpdump is listening

I am running two Virtual Machines over the XEN hypervisor both with Ubuntu trusty (Linaro-Developer version) with the following simple bridge networking setup: Backend domain (dom0): br0 ...
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1answer
31 views

nat and xen, nat only to external ip

I've setup xen that way that all my vm's have a public ip and a private ip (192.168.0.x). However, those vms which don't have a puplic ip should also get internet access so I did setup nat. iptables ...
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30 views

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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1answer
129 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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33 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 - ...
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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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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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50 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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40 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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42 views

Libvirt with Xen fails to start correctly Ubuntu 14.04

at the moment i'M really feeling a little helpless: I tried so setup Ubuntu 14.04 with Xen and libvirt for management. I created a VM but i did not auto-start (altough autostart ist checked). If i do ...
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2answers
277 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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37 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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1answer
84 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
139 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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54 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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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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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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115 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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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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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
497 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 ...