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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What are the practical steps to migrate a virtual machine from VMWare ESXi to XenServer?

I now have a few virtual machines (Windows and Linux) running on VMWare esxi and we are considering migrating to XenServer. Is this possible? What are the practical steps?
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1answer
509 views

Are the xen xe commands available on Oracle VM 3.2?

I recently discovered that Citrix has opensourced XenServer, and that XCP (which we have been using) is more or less now legacy and needless. While looking at rebuilding our systems on XenServer 6.2, ...
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2answers
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Xen: 'this operation could not be performed' (VDI is in use) error?

How do I resolve the error: This operation could not be performed because a VDI is in use by some other operation I see this when trying to (re)start a stopped VM.
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3answers
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xen server 6.2: lost a VM when moving?

I have three servers in a HA group (Xen 6.2). I've been doing some firmware updates which require rebooting so I've been shuffling VMs around to minimize disruption. One of the VMs seems to have ...
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2answers
5k views

xen creating a new virtual machine with bridge networking

I am using CentOS 6.5 64 use this tutorial to setup Bridge [root@CentOS ~]# brctl show bridge name bridge id STP enabled interfaces xenbr0 8000.08002754b3fa yes ...
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1answer
864 views

Hotplug scripts not working xen [closed]

I am using CentOS 6.5 64 using this script to install xen on server yum install http://fedora.cu.be/epel/6/x86_64/epel-release-6-8.noarch.rpm yum install centos-release-xen yum install xen /usr/bin/...
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2answers
167 views

Why would you use Xen as opposed to OpenVZ for trusted Linux-only host/guests? [closed]

Every time I need to create VPSs out of one of our machines, I (re)think the virtualization technologies, and seem to end up with OpenVZ being the most suitable for performance reasons when all I want ...
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2answers
3k views

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
785 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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2answers
161 views

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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2answers
1k views

Xen domU shared drive alternative to NFS?

We have a Xen server where the dom0 acts as both vm host and storage host. Nothing special about the server, the storage is an internal RAID array. No failover partner or anything. Each of the ...
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1answer
2k views

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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4answers
1k views

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
1k views

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 mkfs....
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3answers
4k views

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 (188.40.96....
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1answer
51 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 daemon....
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2answers
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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
82 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 - CPU#...
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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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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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2answers
259 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
1k views

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
701 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
477 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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1answer
446 views

Pacemaker cluster: Xen RA vs libvirt RA

Building a pacemaker cluster to manage Xen domU virtual machines the sysadm can choose between to different resource agents: the dedicated Xen resource agent (ocf:heartbeat:Xen) the libvirt based ...
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2answers
1k views

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
458 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
792 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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2answers
1k views

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
568 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
912 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
563 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
898 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 ...
2
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3answers
2k views

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 ...
2
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1answer
1k views

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
826 views

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
4k views

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
72 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
1k views

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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2answers
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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
135 views

Can no longer add VMs on Xen/DRBD/Pacemaker Cluster

OS: Debian 7.3 & 7.6 Problem: Every attempt to manipulate (create, migrate or even list) the VM's with virsh causes this "Failed to get host power capabilities" warning. I manage a standalone ...
2
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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 ...