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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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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65 views

Openstack Single Physical Network

I am trying to deploy openstack grizzly on a 12 node cluster. I want to use the xen hypervisor. I currently have xenserver installed, and I have 3 virtual machines running Ubuntu 12.04 to use for the ...
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179 views

Xen and Turbo Boost

Running the Debian Squeeze default Xen, I am unable to get any of the CPU frequency scaling stuff going. As soon as I revert to the standard kernel I get it. Digging through the internet it seems ...
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105 views

Upgrading kernel on Debian server hosting Xen 3.2.1

I have a physical server running Debian 6 and Xen Hypervisor 3.2.1, and kernal -a says "2.6.26-1-xen-amd64". I have not updated for a long time, because when I run apt-get upgrade, one of the updates ...
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717 views

Citrix XenApp Fundamentals

I have a problem with a new install of a XenApp Citrix server. Everything was working fine, but I was setting up Citrix Access Gateway and single sign in. Now, on the main server I am getting an ...
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215 views

Why I get different network traffic values from dom0 and from domU?

I'm using Xen 4.0.1 with Linux 2.6.32-5-xen-amd64 (standard packages on a Debian Squeeze system). From Xen Networking: For each new domU, Xen creates a new pair of "connected virtual ethernet ...
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403 views

Xen and dhcp. Not connecting

I'm sorry if this sounds like a really stupid question but I started today for the first time using Xen. I'm using it on a fresh installation of Debian Lenny. I followed this tutorial ...
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13 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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93 views

reclaim space from xen server

i found xencenter stotage => general tah display 1096.6 GB used of 1107.7 GB total (708.5 GB allocated) seen some space have been eaten and not release. the SMLog show that [13816] 2014-03-28 ...
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64 views

Virtual Allocation Unreasonably High

Just upgraded our pool to Xenserver 6.2 and installed a brand new host, also with Xenserver 6.2. Was excited about the new features since Xenserver was fully open-sources (over-allocate ram, ha live ...
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478 views

CentOS 6.5 Xen Virtual Machine Issue 'this function is not supported by the connection driver'

I am trying to segment my system into a number of virtual machines but just cant seem to get this to work. I think I am close but not quite there. I have install xen, virsh, xl etc and I am using ...
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64 views

How can I export a XenServer virtual machine with all its snapshots?

Is there a way to export a virtual machine running on XenServer with all its past snapshots? I have tried to export a VM through XenCenter (right click on the machine and "Export..."). After importing ...
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275 views

xen hotplug can't add vif to eth0: operation not supported

I am new to xen and I am trying to get a domU running but I am having problems with it. I think my network card might not support bridging which is bizarre. This is the error I get when trying to ...
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176 views

FreeBSD XEN kernel not booting in XenServer 6.2

I have a XenServer 6.2 host, and I am trying to get a FreeBSD-9.1-i386 guest to run in PV mode. The installation of the guest is fine, but after a reboot with the new kernel the system does not boot. ...
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44 views

Obtain the free_memory value in xen

I would like to know if there's an alternative to the command I am currently using to get the real free memory for the system (meaning memory that can be assigned to new domU) xm info | grep ...
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62 views

How to move a template from one xen nfs storage repository to another?

I have a bunch of templates on an NFS XCP 1.6 storage repository using thin provisioning for some of my VMs. I want to move the template's disks to a different NFS storage repository. There doesn't ...
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207 views

Xen hangs on boot when scrubbing RAM

I have a CentOS 5 server I can boot into the stock kernel just fine, but when I try kernel-xen, it gets stuck here: http://i.stack.imgur.com/wAI20.png When I try adding no-bootscrub to the kernel ...
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973 views

Nagios: check services being orphaned?

Recently I noticed that there are some warnings in the nagios.log: [1366060611] Warning: The check of service 'pt-deadlock-logger' on host 'xx' looks like it was orphaned (results never came back). ...
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56 views

Domus Memory Used Issue With Xen On CentOS

Anyone know why I'm receiving this error? I compiled latest libvirt from source, I also tried with various rpm. I would like to get memory used by domus and it looks like it's not working with Xen 3 ...
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57 views

OSPF on XEN host running several VMs

Is it possible to set OSPFs areas in a XEN environment to setup a virtual cluster? Main intention is to avoid a external router since all VMs will run inside the same machine.
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83 views

how to setup VM with debootstrap

I'm having problems to configure a virtual machine with xen server. following tutorial I made this steps: make the lvm partitions (root, swap) on my host and format mount root partition on /mnt ...
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995 views

Import Xen Server VHD

I am trialing using a distributed file system as the backend storage for my Xen Servers. I have set up the DFS (distributed file system) (using CentOS and GlusterFS) and everything is working ...
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408 views

Access All VLANS over XenServer Interface

For my current setup, I have a physical NIC on a XenServer machine that receives traffic tagged with various VLAN IDs. I have a virtual machine that is running Vyatta that needs to be able to access ...
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180 views

xen 4.1 host priodically dropping network packets of domU

I have xen 4.1 Host running on a ubuntu 12.04 LTS Server with ip 153.x.x.54. I have setup 2 VMs on it, namely, "dev.mydomain.com" and "web.mydomain.com" with ips 195.X.X.2 and 195.x.x.3 respectively. ...
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124 views

How to make all of my IPs works in HyperVM XEN?

I've installed HyperVM on CentOS 5.8 final to make XEN VPS. I have 5 IPs, and added them to an IPPool. They are from *.123 to *.126. But when I add Virtual machines, just the first one (which indicate ...
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325 views

XenServer Offsite Replication

I am trying to find the best way to migrate my VHD's to my DataCenter offsite for DR purposes. Currently I have a number of Xen Stacks setup as the following: Dual RAID ISCSI SAN multipathed to at ...
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165 views

XCP vm created via xl create doesn't show up in Xencenter neither in xe vm-list

i am running XCP 1.4.90.530.170661 and i have many PV guests running and created via XenCenter. I have created now an openwrt PV guest via the xl create command but it doesn't show up in Xencenter ...
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100 views

Ubuntu 10.04 Xen guest - why would time drift be proportionate with the system load?

We are trying to troubleshoot an issue with random system lockups during medium - heavy loads on an Ubuntu MySQL 5.1 server. There is nothing logging into the system during these lockups. The only ...
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111 views

XEN - (magic) networking issue

I have a very strange situation and do not know where to look. I have a XEN installed on Ubuntu 12.04 LTS. My hosting-provider does require, that every new IP my server uses has an own MAC-address. ...
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168 views

Mounting shared memory in XCP/ XEN Server,for storing VM

Requirement vm with 2HDD each 1gb OS will be installed on hdd 1 and required data on HDD 2 I want all my VM running on Xen Cloud Platform XCP 1.1 to use /dev/shm of host machine for HDD1. Is ...
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477 views

Ubuntu Xen DomU Boot Error

I am attempting to boot an Ubuntu 12.04 Precise DomU (Dom0 is Ubuntu 12.04 with xen-hypervisor-4.1-amd64) and it is failing to boot, dropping me back into a shell (see below). I am using ...
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111 views

How to pass two USB-devices to XEN domU guest?

how do i pass more then one USB device to Xen domU guest? Either usbdevice = 'host:1d6b:0002' OR usbdevice = 'host:04f3:0232' works fine, but with only one device at the time. Obvious thing: ...
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53 views

Linux webserver reboot issue

I've webserver, it works fine when there is no load into it. when I've load onto it and try to restart httpd server gets reboot itself or sometimes it automatically get reboot It is Xen HVM with OS ...
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123 views

how to deal with backup & restore of private cloud environment?

using Cloudstack OSS - with NFS as storage backend.... How to deal with VM image backup and restore? snapshot backup is preferred softwares like PHD Virtual are built for specific Hypervisor: ...
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361 views

Xen domU mem-set issue

I'm running into a problem on my xen 4.0.1 server (debian squeeze) My host has 32G of memory, Domain-0 has 2048 M assigned to it. (scaled down with xm mem-set Domain-0 2048) top in Domain-0 confirms ...
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271 views

CentOS 5.7 Xen Host

Here is the situation: I am running CentOS 5.7 x86_64 with Xen 3.0.3 (xen-3.0.3-132.el5_7.2.x86_64) and the Xen kernel (2.6.18-274.12.1.el5xen). The server has 8GB RAM, and an i7-950 @ 3.07Ghz. I am ...
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586 views

64 bit HVM guest freezes while booting on Debian Lenny 64 bit Xen hypervisor

I'm trying to create an x86 64 bit guest machine on an old Debian Lenny x86 64 bit hypervisor using HVM. The physical CPU is a first generation Intel i7 with VT-x support. Xen recognizes the VT-x ...
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136 views

Xen Hosting - What Could Be Causing My Kernel to Not Boot - At All?

I have a VPS at Linode, and I'm trying to boot Gentoo's hardened kernel - which is patched with Grsecurity and PaX. On Linode, you can boot a kernel of your choice by utilizing their "PV-Grub" ...
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77 views

CentOS/Xen Hypervisor Completely Locked-Up, Where To Look For Answers

Our hypervisor server running CentOS and Xen completely locked-up just right now. The screen was completely blank. I had to hard reboot, and everything came back up normally. No indication of a ...
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750 views

Target filesystem doesn't have /sbin/init — Ubuntu server 8.04LTS

I recently copied the logical volume containing an Ubuntu Server install from one Xen server to another. I have done this many times in the past and have not had issues before. However, when I ...
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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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56 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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57 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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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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83 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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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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78 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 ...
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17 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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68 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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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?