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 install a new xenserver dom0 kernel?

Since Citrix released the full source code to xenserver 6.2 I've been evaluating it. It's works very well, but there is only one problem that I haven't solved. Unfortunately, Citrix do not supply the ...
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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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915 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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LVM is reporting I/O errors, but the disk reports no problems. Argh

I've started seeing errors reported by LVM on certain Logical Volumes (and by Xen when attempting to create virtual machines on these LVs). But I've run tests on the disk, and can't see any hardware ...
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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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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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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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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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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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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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Physical to Virtual Xen on Debian Squeeze

I'm trying to migrate various services from a physical Debian Squeeze box to a number of para-virtualised Xen machines. This is my first venture into Xen, so I'm planning on doing this step by step: ...
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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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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
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xen Dom0 network setup on ubuntu 12.04.1 LTS

I read a lot of tutorials (or at least try to be) but none is able to explain well how to configure networks for xen host. my Dom0 has two interfaces eth0 (real interfaces) and virbr0 (I guess was ...
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Can I use kernel modules on Amazon HVM/PV instances?

It's a perfectly stupid idea, I know. But I want to test one of my older projects, which includes kernel module (Netfilter extension) on a virtualized cloud-y instance. Will it be possible for me to ...
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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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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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677 views

XenServer Guest PV - Serial Port RS232

Is there any way how to forward (passthrough) physical serial port to XenGuest PV system? I need to be able configure serial device with virtual server on XenServer 6.2. I’m looking for some like ...
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XenCenter cannot connect to XenServer

I am trying to establish a connection using XenCenter 6.0 to a server where XenServer 6.0 is installed, but it gives me the following error message: Unable to connect to server '192.xxx.xxx.xxx'. ...
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Can't attach iSCSI with multipathing in Citrix XenServer

Dear people of the world. I have a problem reattaching an iSCSI target on XenServer after a reboot. Whenever I try, I get several errors. Here's me in the attach screen on the redundant storage ...
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175 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 ...
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Stopping System Runlevel V Compatibility

I recently have migrated a VM from VirtualBox to XEN, boot but always the boot stop on * Stopping System V runlevel compatibility [OK] This is the commmand sudo xl create -c /etc/xen/ubuntu.cfg ...
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failed to run bootloader: -3 on create with xl

I have a Ubuntu 14.04 migrated from Virtual Box Have 3 partitions. I've updated the /etc/fstab for recognize the new partitions and chrooted for update the grub I'm using the following ubuntu.cfg ...
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xen gentoo domU (Ubuntu 14.04 LTS dom0)

I have a few Ubuntu 14.04 LTS Xen 4.4 servers and I would like to add Gentoo guests. However I am not sure how to do that. Does anyone know where I can review some examples? Also does it have to be ...
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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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bash: convert date from to unix timestamp changes timestamp

Running the following command at the xen-servers (either DOM0 or DOMU) at $company gives me a negativ number, on every other system zero (0) (even in my cygwin). date -d "1970-01-01T00:00:00" "+%s" ...
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Ubuntu 14.04 VPS won't boot the latest kernel on XEN

I have a XEN VPS and it's been running Ubuntu for some years now. AUtomatic security upgrades are on and I've manually upgraded it continously and also done releas-upgrades whenever there's been a new ...
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Random XEN guests do not boot complaining disk not found

Performed the latest Citrix XEN Server 6.2 updates, skipping anything related to 6.5. Everything seemed normal after fixing GrubConf.py except that a few random Windows Servers would not start. ...
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461 views

What steps should I take to debug this non-starting hvm virtual machine?

I have a dom0 machine running CentOS 5.4 with all the latest updates using Xen as my hypervisor. I am using Xen in part because this machine was set up prior to KVM being included in RHEL, and in ...
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992 views

Converting raw image to LVM. Won't mount afterwards

According to this post, it should be okay, to use dd to convert a raw Xen image to LVM. What I have done dd if=/vm.img of=/dev/vg00/vm I can mount vm.img with mount -o loop vm.img /root/tmp. It ...
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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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XenServer: run management and data over same LACP bond

I have a XenServer (open source version 6.5) machine with 6 available ethernet interfaces. Is there a way to create one single LACP bond with all interfaces and then run the management network as ...
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26 views

Assigning a public IP to a Xen Guest machine

On my CentOS server (dom0) I have 4 Ip addresses: eth1 - 56.x.x.100 eth1:1 - 56.x.x.101 eth1:2 - 56.x.x.102 eth1:3 - 56.x.x.103 How can I map eth1:1 (etc) to one of my guest machine? Currently ...
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Xen server on hetzner with two public up and local virtual network

I use Xen server on my office with a Dell t310 with only one public ip. The public ip is assigned to the router that forward ports to a guestos running endian firewall that route traffic to an apache ...
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start Xen DomU automatically when host is rebooted

I have searched the other questions that are similar, but none of them actually provided the answer. The other answers all go down different bunny trails but leave the original question unanswered. I ...
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2answers
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How do I make all Xen guests use their host clock value?

I've set up Xen server under Linux with several guests running, and all was well. After some time I've noticed the clock on the server drifted away, so I installed 'ntpd', and the clock was back to ...
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use LXC under heavier virtualization (Xen, KVM,Hyper-V,VMVare)

Is it possible to use LXC under heavier virtualization (Xen DomU, KVM, Hyper-V, VMVare) ? I would like to use it as security (isolation) tool, the ability to limit resource consumption is not priority ...
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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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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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1answer
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Whole block device named xvda1, xvda2 instead of xvda, xvdb

I am working on a VM that was set up for me in a public cloud. It's running under the Xen hypervisor in paravirtualized mode and has two virtual disks. So I expect the virtual disk block devices to be ...
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AWS EC2 Instance Shutting Down Prematurely (Possible Xen Driver Issue)

Currently trying to run a JSON Script using CloudFormation via the AWS Console and we're coming across a very frustrating error. The Instance seems to start up, and gets past the 2/2 Check in the GUI ...
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1answer
1k views

Kernel parameters mem and dom0_mem in XenServer 6.1

We are running XenServer 6.1 in production, and recently had OOM-killer fire and eventually take down one of our blades. I noticed that in the kernel logs from the oom-killer instance that it seemed ...
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3answers
932 views

All Xen domU LVM volumes corrupt after reboot

I'm running a Debian Squeeze dom0, and after rebooting it all 7 of my domUs have data corruption. Each is setup as ext3 partition directly on a separate lvm2 volume. None of the lvm volumes will ...
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Xen vs. VirtualBox under heavy load?

Which performs better under heavy CPU and memory usage on the virtual servers, Xen or VirtualBox?
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Xen relay device on DomU

I am using Xen hypervisor. I've two reuirements forward a devfs file to DomU Guest. forward a tty to DomU Guest. forward a pts to DomU Guest. If 1st one works second one will also work. Example: ...
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How can I create a new VM pointing to something other than a CD/DVD

I am new to XenServer and want to experiment with adding new virtual machines. I am running XenServer 6.1 and XenCenter. I have successfully created a new VM by burning a DVD and during the creation ...
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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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Stale NFS handle

I have several xen guest OSs that get their root file system from NFS. I changed /etc/network/interfaces on some of them (on the nfs server) and then rebooted them. Now I get lots of 'Stale NFS ...
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156 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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105 views

xen with image disk files (instead of LVM)

I am currently running virtualbox on linux to run some simple webserver linux hosts. This is because I like the portability and extra isolation security. Because the host (and guests) are Ubuntu, ...