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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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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1answer
102 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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146 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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328 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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1answer
2k views

Convert libvirt Xen configuration to native

I've configured some virtual machine under Xen on Debian Squeeze using libvirt with virsh. Now I want to get rid of the libvirt layer, because I need to configure some specific parameters on the DomUs ...
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763 views

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
38 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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50 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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2answers
2k views

Ubuntu on VPS becomes unresponsive: BUG: soft lockup - CPU#0 stuck for 22s

We have a VPS running Ubuntu, on Xen. The problem is this, about once a day, for about 20-50 minutes, at a random time, the server becomes completely unresponsive to the outside world. After this ...
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8answers
1k views

Deploy Xen

I would like to deploy Xen virtualization, however I definately not sure which way to go. Citrix Xen Server has (AFAIK) better managment tools, but does not provide software raid. Ubuntu / CentOS ...
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2answers
97 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
88 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
181 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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1answer
77 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
68 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 ...
2
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1answer
485 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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213 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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35 views

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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2answers
102 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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16 views

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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1answer
468 views

Open Xen Manager and XenCenter server connection

So, I've got server set up and running the Xen hypervisor version 4.1 with Debian Wheezy (7.5.0) as the host OS, along with xcp-xapi and all relevant services are running correctly. Problems arise ...
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106 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
3k views

How to create a Centos Xen domU on Debian Squeeze using xen-create-image

I have a Xen host system based on Debian Squeeze, and installed xen-tools. I would like to setup a CentOS domU using xen-create-image. xen-tools already 'knows' of CentOS-5, but I cannot seem to get ...
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1answer
46 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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114 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
97 views

Xen open source import and export vm

I am using free Xen 4.2.4-30.el6 on centos 6.5 create a vm using virt-install I want to backup and restore virtual machines, but all tutorials talking about citrix and xe command is there any way ...
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1answer
2k views

How can I change memory resources from within the DomU?

For a certain job I sometimes need more memory in a DomU (CentOS 5). The trigger for the start of the job are some conditions that I can only check within that DomU: The DomU is waiting for an upload. ...
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887 views

Is there option to provide IP address while cloning a VM itself in XEN

I use XEN virtualization platform. I have configured its networking in xenbr0 mode. I have set up one base VM and I am cloning it to create new VMs by using virt-clone command. My question is there ...
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1answer
734 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 ...
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1answer
149 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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14 views

Are Xen 4.1 virtual machines compatible with XCP?

I have a couple of vm installed with Xen 4.1 (basic Xen Hypervisor), now I would like to install XCP packages on my wheezy server. I've read that XCP took control of the server disks and network ...
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228 views

Boot xen server through ipxe

I'm want install Xen Server 6.2 though ipxe, I tried different configurations, no luck making to work until now. I found some may example to boot from pxe using TFTP server, and here is an example: ...
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167 views

Resize a logical volume of an LVM inside another LVM (Xen Dom0)

I have a Xen guest, which its main disk is on an LV (let's call it "domu-disk", VG name "xen"). It's on one single 1T drive at the moment. Inside that domu-disk, it was partitioned into one primary ...
2
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1answer
306 views

Xen Dom0 could not find boot device (or any disk)

I have a brand new DELL server running SLES11 SP1 where I am trying to install my very first Xen Hypervisor. So I installed "Hypervisor and Tools" via YaST (excluding graphical elements), which ...
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1answer
123 views

All connections to a bridged domU originate from the dom0 public IP instead of real IP

I have a Dom0 with a mixed configuration: bridged networking and NAT is set up. There is one NIC connected to the internet (& 3 more that are unused). This is my interfaces file: # The primary ...
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31 views

xen: domu require more memory than mem-set size

Assume that we have install two guest os in xen, named dom1 and dom2. Now, I start the dom1 and dom2, and both are configured with max-mem=4096M; note that my physical memory is 16GB. While dom1 and ...
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113 views

XenServer Console

I just follow this tutorial to access XenServer Console. I can run the first example, and it's working fine, but for the second example it's not working. I cannot access to console with a java ...
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2answers
80 views

How to I forward requests on a IPv6 port to a IPv4 host behind NAT?

I run a Xen Dom0 with 2 VMs NATted (other VMs are bridged, and are ok). This Dom0 has an IPv6 and IPv4 address. Requests to, for example port 25 are forwarded to a LAN address that one of the VMs ...
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1answer
473 views

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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1answer
224 views

Xen: 'this operation cannot be performed' (virtual disk not found) error?

When trying to start a VM: This operation cannot be completed because the specified virtual disk cannot be found How do I work around this error?
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1answer
336 views

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
3k views

Xen - can't create domain because 'vdb could not be connected'

I'm trying to start up a Xen VM, however I'm getting the following error: Error: Device 2049 (vbd) could not be connected. Hotplug scripts not working. what does this mean? The dom0 is CentOS and ...
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4answers
337 views

Allocated Memory difference in xen guests with Linux 2.6.18 and 2.6.32

Can some one explain me why there is difference in available memory on Guests with same configuration: Hypervisor:xen 4.2 64 bit VM1: Centos 5.7 with 2.6.18-274.el5xen, Assigned memory from xen is ...
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20 views

XEN - Start VM after changing the toolstack

I've changed the toolstack from xend to xapi. Using the xend toolstack I could start a vm like xm create myconfigfiele.cfg. How can I start the same VM using xapi?
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201 views

nagios volatile service and system time change warning

I have a nagios service with volatile option on (executes event handler every time it encounters a non-ok hard state). Problem is that if the event handler executes for 2-3 times (that is the expected ...
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1answer
1k views

Xen Bridge Over VirtualBox Bridge

Short version: Will a Xen bridge work over a VirtualBox bridge? If so, how does it work? Long version: I have Debian 6 (Squeeze) 64bit installed as a guest in VirtualBox, which is setup as a bridge ...
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113 views

Xen blktap qcow/qcow2 not connecting

I have a similar issue as posted here, but with qcow/qcow2 images: Xen 4.1 host (dom0) with blktap disks ("tap:aio:") not connecting I tried Xen 4.1 on Ubuntu 12.04.04 precise, with both ...
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2answers
537 views

stock arch linux with pv-grub on linode

I am attempting to use pv-grub on a stock arch linux instance on linode by following this post:- http://forum.linode.com/viewtopic.php?p=49387 Unfortunately, I am unable to get my pv-grub enabled ...
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1answer
179 views

Trying to create an ElementaryOS PV guest on Xen

I am trying to install ElementaryOS as a pv guest on my server for testing purposes. Elementary OS is a fork of Ubuntu Precise. Elementary does not come with PV support, however, I can obtain the ...
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1answer
271 views

Upgrading openssh-server on XenServer 6.2

I have XenServer 6.2 which only has version: OpenSSH_4.3p2, OpenSSL 0.9.8e-fips-rhel5 01 Jul 2008 I tried to upgrade it using: yum -y reinstall opnssh-server or yum -y install opnssh-server ...