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 increase the swap size on a xen guest machine using xm?

I'm attempting to increase the amount of swap on a xen guest machine. At first I thought it'd be similar to increasing the hard drive space, which I do like this: cd /srv/xen/domains/$host/ xm ...
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Transfer VM without shutting it down? [migrated]

Is it possible to transfer a VirtualBox VM from one server to another without shutting it down? Is there any way to achive this? Does this technology have a name to identify it? As far as I know Xen ...
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40 views

Xen 4.4 mixed routed/bridged network vm does not work

I have updated one of my servers from Xen 4.1.4 (Debian squeeze) to Xen 4.4.1 (Debian jessie). As xend/xm is deprecated I would like to use the xl tool kit with Xen 4.4.1. But now I have issues with ...
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24 views

How to expose DomU's to router network?

I currently have a server connected to a router through a single NIC. The server has a running XEN setup with several DomU's. Everything seems to work fine, I can access internet from both Dom0 and ...
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10 views

Adding “VMs by Software Product” to XenCenter's view menu

XenCenter has a "VMs by Operating System" dropdown menu. I would like to have a similar menu "VMs by Software Product" which displays VMs grouped by certain software products and releases. Each of ...
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20 views

What is causing `skb rides the rocket` errors?

On one of our busy (virtual) Debian 6 servers we are seeing a lot of messages in the syslog like this: kernel: xen_netfront: xennet: skb rides the rocket: 19 slots We are seeing some connectivity ...
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23 views

Difficulty sharing physical ethernet device with Xen 4.4

I have a virtualized PowerEdge T320, with a Ubuntu Server 14.04 running Xen 4.4 as host, that I use at my lab to do scientific computations (I'm the admin of the machine). This server has two physical ...
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48 views

External USB drive on xen windows guest

I have an external USB 2Tb drive I'm trying to use with a xen guest. Xen Center 6.1 sees the drive in the removable storage repository and I can assign it to a guest. But the guest (tested ...
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7 views

xen routed setup, no internet connectivity in domU

My server has 4 public ips, but I have 5 vms running, the vm which doesn't have an own public ip should be able to reach the internet and all other vms over private interfaces. I configured a private ...
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20 views

Using Xenlight with libvirt in debian, Unable to configure listen with remote libvirt

I am using libvirt 1.2.0 with xen hypervisor 4.4 in debian server. I am facing error when I try to connect remotely with other libvirt using TCP or TLS. I couldnt make libvirt to listen to the port. I ...
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21 views

fdisk -l do not detect device accessed using iscsi o XEN virtual machine

I am experiancing an issue in accessing the iscsi target in VMs created on XEN hypervisor. I have used Suse 11 SP3 to configure this. After discovering the iscsi targets from VM , I am able to view ...
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Xen VM could not be installed

I have rented a server from Hetzner. I have installed Xen on Dom 0 - Centos 6.5. I couldn't create a Dom1 Centos 6.5 VM. The Error I see is 'Unable to retrieve 'the link for centos image' while ...
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46 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 ...
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40 views

How to know the real amount of RAM in a VPS

I've been told that a VPS's RAM can be manipulated (oversold) by VPS providers. I know I can always buy a VPS from a reputable company, but, really, how can one make sure the allocated memory is the ...
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37 views

How to boot xen dom0 with UEFI support?

I boot my system with EFI+grub2. If I boot into a normal system, I can modprobe efivars and view all the efi variables. But if I boot into xen, I cannot see the efi variables from my dom0. I build my ...
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113 views

Cannot create windows HVM with SDL in xen 4.4.1

I want to create a win HVM, and set sdl=1. I was able to do so. But after I upgraded to xen-4.4.1, I got this error libxl: error: libxl_dm.c:1371:device_model_spawn_outcome: domain 4 device model: ...
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23 views

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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67 views

VGA passthrough grabs wrong device

I've succesfully set up VGA passthrough with a Quadro 4000 and everything is working great. My motherboard is a SuperMicro H8DGi/F with 2x opterons 6140, an onboard Matrox G200 and a discrete Quadro ...
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114 views

host only network xen 4.4

I have one IP address (ipv4) and I am trying to install a domU (debian stable) on a dom0 which runs the latest xen 4.4.1 on debian testing. I have created xenbr0 bridge and it is mapped to my eth0. ...
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37 views

create parition for xen with lvm on raid-1

First I don't have any experience creating xen, lvm and RAID-1 server, thus after several reading I stumbled upon this ubuntu documentation to install xen. BUT, because in the documentation it ...
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38 views

XEN virtual machine with IPv6 but without IPv4

How should I create a new virtual machine using xen-create-image if I just got the IPv6 from my hoster? When I tried xen-create-image --hostname=s1.example.com --size=70Gb --swap=8Gb ...
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Monitor outbound SMTP Xen node

Using Xen-PV on one of our nodes, looking for some suggestions on how I can monitor anyone sending mass outbound emails. May be using Tcpdump?
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38 views

Xen cannot see all the LUNs in ISCSI HP StorageWorks MSA2312i Dual Controller Modular Smart Array

I have a HP StorageWorks MSA2312i Dual Controller Modular Smart Array and a second enclosure. I have four vdisks: vd01 (RAID5) (Current Owner A) vd02 (RAID5) (Current Owner B) vd03 (RAID10) ...
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39 views

Migrate from xl to xe (xapi) tool stack

I have a Ubuntu 12.04 machine with running XEN 4.1 currently i'm using xl as tool stack i want use xe (xcp-xapi) see has more options. I have several .cfg files each holds the settiong to create a ...
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Xen lvm resize2fs: Bad magic number in super-block

First of all i have to say i've been looking through lots of posts very similar to what i have but none could solve my problem... In my xen server i use 5 lvm disks per virtual machine: /boot / ...
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1answer
56 views

Can I configure IO error proof Linux on virtualized environment? [closed]

I believe everyone who are working on virtualized environment like Xen has experienced some sort of IO problems which lead to read only mode for guest machine. We experience same issue couple of times ...
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54 views

auto remount read only filesystem

We have an Ubuntu Server 12.04 LTS running on Xen. I believe we had a disk problem and Ubuntu switched to read only mode for partition "/". However the disk problem was just for a second and other ...
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194 views

Weird Phusion+nginx spawning delay error

We are trying to migrate an application written on REE from cloud provider A to cloud provider B. The application code, VM specs and operating systems are the same. The basic difference is that cloud ...
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1answer
146 views

Why Linux guest VMs performs better than Windows ones in terms of network?

I am testing the network performance of VMs in Xen and Hyper-V using Iperf and Netperf. In both hypervisors I found a Linux guest VM in different modes is having a relatively high performance than a ...
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188 views

New XEN Server, Intel i7, Errors were encountered while processing: xen-linux-system-amd64

I have just got a new machine to run XEN VM's on, it has an Intel i7 processor: - Intel Haswell Core i7-4790 3.6GHz 8MB LGA1150 Update [Screencast of what I am doing - ...
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432 views

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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Linux xen directly boot windows domu?

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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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
55 views

booting straight into xen VM

I have a need to convert a bare-metal machine to a virtual-machine (via VMware converter). This part has been done successfully. I have then been asked to convert the vmware image to a XEN hvm. The ...
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111 views

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
104 views

InfiniBand RDMA latency test on Xen's dom0 crashes

The short story: while setting up InfiniBand connection between two servers, I cannot complete the RDMA latency test. It crashes even with breaking the ssh connection. The long story. The first ...
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1answer
250 views

XenCenter no OS boot parameters field

I just recognized, that 2 of my 10 VMs in XenCenter have a slightly different properties window. In these two VMs I cannot set OS boot parameters, because in the window I can only set the boot order. ...
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94 views

Dedicated Server and SolusVM with Xen

I have just setup a new SolusVM Xen Node at my DC. The server is colocated there, it's owned by me. It was in Florida working perfectly as an OpenVZ node two days before. It was taken offline and sent ...
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1answer
71 views

RAID 10 and LVM

I have just setup a new SolusVM Xen Node at my DC. I asked them to install CentOS6 with Software RAID 10 and 100GB to root then the remainder to an LVM group for Xen. All in Software RAID 10. The ...
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1answer
703 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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251 views

BUG: soft lockup - CPU#0 stuck for 23s! on XEN PV debian related to high i/o load

i am currently experiencing some problems with my Debian Xen System. It runns on an old opteron System with two Dual Core AMD Opteron(tm) Processor 275 CPUs. I am using image files (block devices) ...
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2answers
838 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
39 views

xen project - bridged interface shows 2 MACs

I have a simple xen project 4.1 setup running on debian wheezy dom0. I have noticed during a network scan that a domU gateway returned 2 mac addresses for the same IP. One MAC being the expected, ...
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xen 6.2: is there a maximum shared storage size?

Am attempting to grow the volume size on shared storage from 2Tb to 3Tb. Have resized the volume but am not seeing any change when I ssh to the pool master and attempt to detect the change(s). Am ...
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Xen: resizing underlying iSCSI SAN volume

I have a SAN volume that provides the storage for 3 machines running Xen 6.2. The volume is down to about 10% free but there is more available unallocated. The SAN (Equallogic) supports volume ...
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113 views

PXE boot server on a xen PV guest?

I've set up a Xen hypervisor on ubuntu 14.04 and a PV guest also on ubuntu 14.04. I want this PV guest to be a PXE boot server. But when I look at the /boot folder I see that it's empty. I'm a newbie ...
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111 views

xen routed networking maximum segment size

For a few days now we experience issues with xen in routed networking mode regarding the MTU and MSS values (xen 4.1, debian wheezy, ISP is Hetzner) (network-script 'network-route netdev=eth0') ...
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1answer
118 views

Hammered by botnet; iptables can't keep up [duplicate]

Fructis is a multi-site (and multi-software) VM (Xen) with 2 cores and like 6G of RAM. It hosts popular Drupal and Wordpress websites and is currently getting hammered. I will put all details below. ...
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1answer
54 views

Capturing video of virtual console output of Xen vm

I would like to capture the video output of virtual machine running on Xenserver from boot-up and through reboots. I know I can capture the video by capturing the output of an assigned VGA adapter, ...
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917 views

Xen Server 6.2 Upgrade to SP1

I installed Xen server 6.2 and I am currently playing around with it. I managed to install 1 vm, and I have applied all hotfixes available up to the Service Pack 1. That specific patch gives me an ...