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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unrecognized usb passthrough to windows server 2012 r2 on ubuntu 16.04

I have a ubuntu 16.04 lts on a intel NUC machine. I want to use a TV usb tuner, in Japan, which only works for Windows. So, I'm trying to install a windows server 2012 r2 guest VM on the ubuntu ...
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1answer
22 views

Xen Server interference on ARP requests

I have a strange behaviour on my network as my unix-like hosts seem to have problems to reach the gateway. Digging into the network traffic via tcpdump, I've seen that two different hosts answer to ...
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1answer
1k views

Ubuntu upstart hangs on interactive start & stop

How do I get Ubuntu upstart to not hang on interactive start & stop? I have created many upstart scripts that work fine during init, but often hang when I enter them at the console. If I CTRL+C ...
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0answers
336 views

How to Reclaim Space from XenServer?

I found that the XenCenter storage tab claims there is 1096.6 GB used of 1107.7 GB total (708.5 GB allocated). It appears that some space has been eaten and not released. The SMLog shows: [13816] ...
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2answers
3k 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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2answers
1k views

Xen Remus setup

Currently, I'm running the IT for a small organization, and we just purchased a new server to replace our aging Dell poweredge. As the Dell isn't so bad as to be junk, I was hoping to set up Xen on ...
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1answer
2k views

Xenserver 5.6 SR_BACKEND_FAILURE_47 no such volume group, but it is there

I've looked everywhere (Google, here, a bunch of other sites), and while I have found people with similar problems, I couldn't find a single one with a solution to this. Last night our xenserver 5.6 ...
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1answer
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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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Comparaison between OpenVZ, Xen and KVM on top of Virtualbox

I have to make a comparaison between OpenVZ, Xen and KVM. However I only have a laptop for that and I don't want to install all of them in different partitions. My question is, does it make sense to ...
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1answer
1k views

Where is my new hard disk Citrix Xen Center

I'm trying to create a new storage repository on a server that already has 2 old hard disks, set up with hardware RAID 1. It's my first time doing this in Xen Server environment so I wanna be extra ...
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1answer
1k views

Install xenserver on iscsi target

Is is know that Xen Server is based on CentOS, and it is fact that CentOS can be installed on an ISCSI target flawlessly, but I wanted to install Xen server on an ISCSI target I couldn't find a way. ...
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Error while creating VM using virt-manager on Xen

After a great struggle I got my XEN installed now I am using virt-manager and trying to create a VM. Since my H/W doesnt support full Virtualization using the Para Virtualization installation over ...
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1answer
1k views

Cannot connect to Xen domU via VNC if X isn't installed on domU

I'm trying to build a Xen domU that can be connected through the Xen's VNC server. Below is the template (actually it's generated by OpenNebula): name = 'one-153' #O CPU_CREDITS = 256 memory = '128' ...
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1answer
2k views

How to get virtualized SR-IOV Infiniband interface UP?

I've spent several days on this now and I've managed to get SR-IOV working with the Mellanox Infiniband card using the latest firmware. The Virtual Functions appear in Dom0 as 06:00.1 Network ...
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1answer
4k views

Can I use XenServer GPU Pass-Through without XenDesktop?

XenServer documentation only covers using GPU Pass-Through ("vGPU") to run XenDesktop's "HDX 3D Pro Graphics." XenServer GPU Pass-Through cannot be used with the XenCenter VNC console and it does not ...
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Auto Power On Xenserver 6.5

After applying updates to my xenservers I noticed VM's that were turned off turned themselves on after the server I applied updates to rebooted. I do not have any vApps configured and I did not ...
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1answer
3k views

Bringing the xenbr0 interface up on XEN under Ubuntu 8.04

I installed XEN on Ubuntu 8.04 using this tutorial but after I reboot with the XEN kernel, I don't have xenbr0 device. I see that network-bridge script runs and it creates peth0 device, but not ...
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2answers
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Blocking STP Traffic

I am using Xen virtualization with a bridged mode netwrk. I noticed that there is a lot of spanning tree (as understand) traffic coming from a network. Such as: STP 802.1d, Config, Flags [none], ...
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1answer
884 views

Xen VM won't come up: could not find bridge device xenbr0 (configured to use routed)

I am using xen 4.4.1 on an Ubuntu 14.04 server, my DomU is running Ubuntu 14.04 Server as well. I've run this DomU in bridge-mode previously no problems. However I want to switch to a routed setup. I ...
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1answer
11 views

Can't find logical volume when booting imported disk images in Xen guest

I've got a couple of drives I copied over using ddrescue to image files for booting under Xen. They contain an LVM volume group with a couple of volumes in it, which was originally split across two ...
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3answers
2k 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
43 views

Active/Active MultiPathIO to two HP d2700s?

Our XenServer 6.5 hosts connect over ethernet to shared SAS storage via a single Linux based HP DL360 G6 "bridge". This single StorageServer bridges ethernet to SAS and shares out via an iSCSI ...
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virsh (xen) not listing dom0 nor domU

I have Xen 4.4.2 installed on Ubuntu. xl list shows Dom0 and all DomU but virsh -c xen:/// list --all doesn't return anything. virsh version returns Compiled against library: libvirt 1.2.2 Using ...
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Xen migration - Error [backed has not unmapped grant]

I am trying to migrate between two servers running Xen version: 4.1.6.1 and Ubuntu 12.04.5 LTS. The problem I am currently having is when I migrate from: Server1 -> Server2 (with VNC I see this) ...
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3answers
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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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1answer
65 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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2answers
723 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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5answers
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Can I virtualize multiple hosts into one virtual system?

I have 5 computer systems in our small office. From my basic understanding of Virtualization technology, I think I can virtualize the 5 systems into one big virtual system. I wish to confirm this. ...
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2answers
64 views

Ping only works twice

I have created a vm inside a xen host. By following this guide, I have managed to ping www.google.com, but it only ping-pongs twice before getting Destination Host Unreachable. If I restart the vm, I ...
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Xen - VM not reflecting memory

I am using Xen to hot-add memory to virtual machines, but it seems that I am not getting the correct vales in /proc/meminfo on the guest. As displayed below the guest has 2 GB of allocated memory. ...
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554 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: When I try adding no-bootscrub to the kernel command line, I get this and a ...
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56 views

How to recover XenServer vm's from a mdadm raid 1 HDD

I have an older server, namely, Fujitsu Siemens Primergy TX 150 S6 on witch i have installed XenServer 6.5.0-90233c. On it i have multiple virtual machines of different sizes of witch i need to ...
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8 views

Testing migration in vmware workstation

I have VMware Workstation 12 with two centOS guests installed, lets say C1 and C2. I am using Xen inside C1 and C2, lets say X1 and X2 respectively. I want to migrate vms from X1 to X2. I know this is ...
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Kali Linux under Xen

I've been trying to get Kali running as a guest dom, but so far the results have failed. My LVM is located at /dev/sdb --- Volume group --- VG Name vg0 System ID ...
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1answer
102 views

Xen reduce VCPU

I am trying to reduce the number of VCPU on Dom0, but not understanding why its not reducing the number. Log: [2016-02-11 13:43:25 2550] INFO (XendDomainInfo:1977) Set VCPU count on domain Domain-0 ...
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18 views

lvcreate reports disk full, vgdisplay says space still exists

I'm attempting to create some new lvm partitions for a Xen VM. The drives are already set up - running sudo vgdisplay give me the following: --- Volume group --- VG Name n3850a-vg0 ...
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41 views

XEN kernel, CPU missing flags?

I'm using Opteron 6386SE processor, 16 cores. It's capabilites (flags) are here: CPU World But when I run cat /proc/cpuinfo (dom0 or guest), flags are missing, for example SSE3 and SSE4. flags ...
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2answers
1k views

Xen host and guest sharing same IP

Is it possible for both Xen host and Xen guest to share same IP (albeit with different ports)? We have a single public IP, and want to have both the Xen host (as host only, no other role) and the Xen ...
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7answers
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Is virtualbox good for live server virtualization

I used virtual box before to test OS installation on my own personal computer. I'm not sure if it's suitable for actual virtualization on live servers. I mostly hear about Xen for that. Is virtualbox ...
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VNC not working on XEN/libvirt domU - debian jessie

Hi recently configured a brand new server for testing purpose: debian jessie (8.3) xen 4.4 (xl toolstack) virtinst I created and started a new domU through virt-install: virt-install \ ...
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Xen+Libvirt: How to use PVH mode with Libvirt?

PVH mode is an hybrid of PVHVM and PV modes, where you use both virtualization and paravirtualization techniques for improved guest performance. It's been introduced around Xen 4.4. I'm using Xen 4.6 ...
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30 views

Migrate Virtual Machine from KVM to Xen

I'm trying to migrate a Virtual Machine from Qemu KVM to Xen Hypervisor 4.1, but have problems with it. What is the best and simplest way to do it? What I've done so far: I have installed ...
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1answer
1k views

Linux xen directly boot windows domu? [closed]

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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2answers
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Remote automated provisioning to a XenServer Hypervisor

I'm currently working on a project where I use Vagrant with Ansible provisioning to create local environments in VirtualBox. I'm currently working with a University and we have a XenServer Hypervisor ...
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49 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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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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51 views

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
36 views

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
184 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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2answers
621 views

Need informations about RAID5 behaviour in XenServer 5.5

I've detected an I/O error in my partition /dev/sdd3 which is a part of 4 devices assembled with RAID5. Now my server is in degraded mode with only 3/4 sync drives. I have a boot partition ...