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 do I configure Xen's virtualization of interfaces (eth0 to peth0)?

I installed Xen a while ago but had not yet booted up with the hypervisor. Well I did yesterday and all hell broke loose. I completely lost internet connectivity on my server because of Xen. When I ...
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1answer
753 views

Why is LVS dropping packets?

I am currently trying to get down to the core of a problem where my LVS-director seems to drop a packet coming from a client from time to time. We have this problem on our production systems and can ...
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3answers
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How to connect to xencenter console remotely?

I need to administrate xenserver remotely. I have redirected 443 port in my router and now I can administrate XenServer. But I need to create VMs, how can I use XenCenter console to see VM desktop ...
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Retrieve data from the failed Windows Server on Rackspace Cloud Server

One of our Windows Server 2008 servers which was hosted as a Cloud Server on Rackspace has recently failed. We are not getting much help from the Rackspace support, all they keep saying is that ...
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1answer
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Help me understand how Xen vCPU/CPU works

Say I have a Dual-Core server, that's 4 cores w/ two physical processors. I read numerous articles that states the dom0 should get one physical core to itself. By core, does that mean a single CPU ...
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Virtal Machine Managment Control Panel - Xen/KVM [closed]

We are looking for an open-source or low cost virtual machine management control panel. We require it to be able to manage up to dozens of hypervisors and thousands of virtual machines. It should be ...
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1answer
151 views

which distribution does support xen4?

i've just realized that ubuntu 10 LTS doesn't support xen anymore... So which distributions have native support for xen 4? With native support i mean, that i can simply install and update them with ...
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1answer
3k views

iSCSI or NFS for Oracle VM shared storage?

I'm configuring a 4 node Oracle VM environment. One management server, two vm servers and a storage server with direct attached storage. The storage server is running Linux and I thus have the ...
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4answers
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Linux / Xen Server freezes

An Ubuntu LTS server runs xen with dom0 and one virtual machine. The server is freezing permanently on a number of seemingly unrelated operations, such as: Creation of a new file system with ...
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debian lenny xen bridge networking problem

DomU isn't talking to the world, but it talks to Dom0. Here are the tests that I made: Dom0 (external networking is working): ping 188.40.96.238 #Which is Domu's ip PING 188.40.96.238 ...
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1answer
40 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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2answers
56 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
63 views

“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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192 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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1answer
300 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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2answers
230 views

xen vm memory missing

I have an Ubuntu server with 320GB of memory. I installed xen 4.4.1 on this machine, and run 2 Debian VMs. One with +-100GB of memory and one with +-200GB. Everything worked fine, until at one point, ...
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1answer
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Xen SATA PCI Passthrough to Ubutnu DomU not recognising disks

I have a Xen 4.1 server with a Debian Wheezy 7.4 Dom0 (hmpyxen01). It has a SATA PCI card that I am passing through to an Ubuntu Precise 12.04 DomU (hmvmtmp01), installed via xen-tools which in this ...
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2answers
676 views

fix kernel on Xen Server hypervisor vps

I have a cloud server hosted at Rackspace, and they use Xen Server hypervisor. I was running Ubuntu 12.04, and really messed up by attempting to do a release upgrade manually. The hypervisor ...
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3answers
14k views

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
437 views

How to exit xen domu when using linux terminal

I usually use putty to connect on a xen domus. To exit domus after using "xm console", it's ctrl + 5 But how can I exit vm console on linux terminal?
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2answers
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How to get HP ASM to work under Xen Hypervisor?

I have a HP DL560, currently running Debian Squeeze as dom0 on Xen Hypervisor, and the fans constantly run at 100%. In the past this wasn't a problem because I could install HP's ASM which includes ...
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1answer
102 views

Safely rebooting a machine

I've got a simple XenServer running here and it suddenly stopped responding (I don't know why, it just doesn't respond to anything, but let's put that aside). I think I need to reboot it, but this ...
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1answer
452 views

How to route the public ip of xen guest outside of host system?

I have an xen kernel installed in centos 5. In that xen kernel, i have decide to create the guest os with public ip for amanda backup server . But i cannot able access the guest os using public ip. ...
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3answers
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VNC connection to EC2 instance without installing a VNC server

I was wondering if it was possible to connect to an Amazon ec2 instance via VNC, but instead of installing a VNC server in the target machine, somehow connect it to the hypervisor's graphics output ...
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4answers
779 views

A better inexpensive 2 node cluster

There is a Xen cluster that setup that I really like. It consists of 2 nodes (let's call them 1 and 2). Each node has 2 non-raided drives (A and B). A1 replicates to A2 through DRBD and B2 to B1. ...
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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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1answer
565 views

SLES 10 SP1 domU eth0 not up at boot

I have a SLES 10 SP1 domU on a SLES 11 SP1 dom0 for the purposes of a build server. After moving around some file systems, when I rebooted the domU, the networking no longer worked. When logging in ...
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1answer
907 views

Compiling kernel from source (for Xen), do I use plain kernel?

My VPS host uses Xen, and instead of using its custom kernels I could use my own (with pv-grub), the sample kernel of which I had installed to test this was is the following, I am running Debian 6 ...
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1answer
562 views

Debian - corrupted GRUB

I have installed Xen on Debian following the official manual from debian.org. After that I runned grub-update and some time later removed Xen, including xen kernel. I runned grub-update one more time, ...
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1answer
895 views

Enlarging image disk space on an existing virtual server (centos 5 guest on centos 5 host - Xen)

Is it possible to increase the size of an existing virtual server image (centos 5 guest on centos 5 host - Xen)? I just installed a new guest, and found out that I did not assign enough storage to the ...
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3answers
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Oracle VM 2.2 nodes rebooting for no obvious reason

I have a simple four node Oracle VM environment. A management server running in vmware, a nfs server for shared storage and two Oracle VM servers running the actual hypervisor. For some reason the ...
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1answer
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DRBD/LVM/Xen Setup not re-syncing/updating

I have a problem with a HA Cluster running on CentOS 5.4 x86_64. Software used: DRBD 8 (kmod-drbd-xen-8.0.16-5.el5_3.x86_64 / drbd-8.0.16-5.el5.centos) Heartbeat LVM2 Xen 3.1.2 My DRBD ...
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1answer
831 views

xen managemenet gui tools

We have 2 physical server with 64gb ram 4 socket of quad 2 core RHEL 5.3 XEN install on top win2k3*8(8 server of win2k3) and win2008*4(4 server win2008) running is any tool at open source to manager ...
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2answers
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Crashing HVM domain, what do I do?

My DomUs on a Xen 3.4 on an RHEL5 are crashing when too much memory is needed: (XEN) p2m_pod_demand_populate: Out of populate-on-demand memory! (XEN) domain_crash called from p2m.c:1091 (XEN) Domain ...
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2answers
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Debian Lenny as Xen domU fails to boot

here's the thing: I have Debian Lenny running Xen dom0, and I want to install another Debian Lenny as domU. I followed the guide at Debian Wiki to the letter. Installation goes fine until Debian ...
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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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2answers
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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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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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1answer
5k 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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3answers
4k views

Which hypervisor to play nice with docker.io

I have been running several different virtualisation servers, (ESXi, XenServer, Proxmox/KVM) in the past. I am now in a position where I need to set up a new virtualisation environment that is ...
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1answer
187 views

Xm setup on SunFire X4200

I'm trying to set a Xen VM on a SunFire X4200. I'm using Debian Wheezy and have followed this guide https://wiki.debian.org/Xen which I used in previous attempts on different servers and worked ...
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2answers
807 views

Xen VPS not reflecting the RAM upgrade using xm mem-set

I'm trying to upgrade RAM on a Xen VM without reboot. Although it looks working from the host node, the VM isn't picking up the upgraded memory. Upgrading from 756 MB to 1024 MB. Below are the ...
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1answer
933 views

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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1answer
687 views

Dom0 not forwarding to DomU

The situation: DomU: Debian SID /etc/network/interfaces auto eth0 iface eth0 inet static address x.x.x.55 gateway x.x.x.49 netmask 255.255.255.255 pointopoint x.x.x.49 Ping DomU -> x.x.x.49 ...
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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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1answer
407 views

Running commands on FreeBSD Live CD

I'm running FreeBSD 9.1-PRERELEASE on a vps running on XEN virtualization, I tried to update it to 9.1-RELEASE but mergemaster toasted my /etc/master.passwd and /etc/passwd so what i have now is a ...
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1answer
210 views

Access to WAN from one VLAN

i want to create a VLAN for 3 guest VMs. I already have it and every VM can ping each other, but the problem is that any guest CAN NOT have access to Internet Network configuration in Host machine # ...
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2answers
410 views

Randomly crashing Ubuntu 10.04 on multiple Xen VPS host instances

So we have Ubuntu 10.04 running - all 64 bit. Kernel 2.6.36 and 2.6.38-15 are having the same issues. Problem is random VPS servers are hanging. We have about 30 instances with this particular ...
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1answer
487 views

xen and libvirt bridge configuration

I have a Centos 5.5 server with Xen 3.2 and libvirt for virt-manager installed. Before installed libvirt I have the bridge configuration just like the documentation on Xen says: xenbr0, eth0 and ...
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2answers
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Why is OOM killer hitting here

We have some VMs running kernel 2.26.26-2 under xen 4.0.3 with different CPU and RAM amounts and on some seeing almost random OOM events each rendering the VM unusable. Output is as follows, I have ...