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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Giving Virtual Machines in Xen their own IP Addresses

Installed Xen on a server at home, recently moved it to a data center. Worked fine with DHCP behind my router, with each virtual server and the dom0 getting its own IP address. At the data center, ...
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1answer
3k views

RHEL5 Xen dom0 max memory?

I have a server with 48GB or RAM on which I have installed RHEL5 with the xen kernel. I think maybe this is normal behavior, but the kernel only seems to be able to see 32GB. I looked around online, ...
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18 views

Linux Redhat 6.0 booting freezed at “starting RHM Managed Xen Domains”

One of our Linux redhat 6.0, 64 bit machines freezes **after the step of "starting RHM Managed Xen Domains"** during booting. It has been staying there for days without successful booting. ...
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25 views

Openvswitch/Xen VLAN connectivity

I`m looking for help with Openvswitch... In a Xen virtualized environment I have VMs(both Linux and Windows) set up on different VLANs and between 2 VLANs I need to set up inter-VLAN conmmunication. ...
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1answer
852 views

Cannot use I/O in console for Xen HVM running FreeBSD/pfSense

I've been having a really hard time trying to get a Xen HVM using pfSense 2 (based on FreeBSD 8.1) working. I can make the machine run, and boot from an ISO image, but I cannot get I/O to work in the ...
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2answers
2k views

Boot hanging on SELINUX?

SELINUX is disabled on this this machine (which is a CentOS instance under Xen) but the boot process gets to a point that mentions an audit and SELINUX and then hangs. Is it ever going to come back? ...
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1answer
112 views

Switching back to libxl from xend without rebooting

I did something dumb: I enabled xend over libxl and started an instance with xend. Now, libxl won't start any instances, even though I got rid of all the xend instances and stopped xend: root@xen1 ...
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13 views

OpenSUSE Xen Multiple Apache VM's

I am attempting to set up an OpenSUSE 13.2 server with Xen Hypervisor installed. The problem I have now encountered, is how do I route the correct requests to the correct VM instances. Lets say I ...
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2answers
8k views

How to change boot device on vm installed on Citrix Xen Server to DVD

I have installed Centos 6 on my new Xen Server (XenServer release 6.2.0-70446c). Everything went smooth. System is working fine but now I want to change boot device on that VM to boot from DVD (iso ...
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1answer
8 views

Load for Xen units

I'm looking for a way to check load for Xen units on a xen Node run by Solusvm. I know OpenVZ can show container load in the solusvm panel. But if I go to load in svm for the Xen Node the load page is ...
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1answer
133 views

Convert Physical Machine to Xenserver

I am planning to convert all my physicals machines into Xen virtual machines. But i can't find any documenation on that? is it just to make a image file and convert it to a vdi ? I may have to ...
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1answer
45 views

Xen hypervisor component/plugin development [closed]

I am new to virtualization as a concept, and am particularly interested in Xen. A machine is a complex system composed of many parts/constituents: CPUs (one or more) RAM Hard drive Network card ...
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2answers
108 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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2answers
48 views

How can I best secure NFS between an Xen host on Debian and VMs?

After some research, it seems that the best way to share files between my Debian Xen host and the virtual machines on it is to use NFS. How can I secure NFS so that only the specified VM can access ...
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2answers
112 views

Why do I not get a console for my CentOS6 PV DomU on CentOS6XEN4 Dom0?

I am currently in the process of migrating from SLES11 SP3 as Dom0 - running the "old" xend/xm-stack to CentOS6 XEN4 running the "new" xl-stack. I stumbled across a strange problem: After pygrub ...
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1answer
125 views

How to prevent a XenU domain from being saved

Xen (like other) virtual machines allows VMs to be saved and resumed. Xen on Debian Lenny, for instance, is configured to save and resume virtual machines on Dom0 restarts. Is it possible to have ...
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1answer
231 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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1answer
2k 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
40 views

What problems arise if user-space drbd is older than the kernel module?

Since more than five years I am using XEN in a productive environment. My constellation: SLES11 (included: OpenSource XEN 4.x), DRBD 8.3 in primary/secondary mode. Now I would have loved to go away ...
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4answers
10k views

DRBD on a disk with existing file system that takes all the place

I'm currently trying to simulate the environment via XEN. I have installed two debian systems with such FS layout: cltest1:/etc# df -h Filesystem Size Used Avail Use% Mounted on ...
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18 views

What is the xsave cpu feature? [duplicate]

Recently after updating to xen v4.5 I lost my ability to boot my hypervisor. It would restart after saying "scrubbing free ram." After some frustrating trial & error I traced the problem to the ...
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1answer
40 views

XEN - Does pygrub alter grub on dom0

I apologize for question but I did not really understand the idea behind pygrub. I've downloaded VM from stacklet.com. The image is shipped as a ext4 file and pygrub config. My question is if I can ...
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2answers
3k views

Windows Server 2008 network speed slow, Xen 3.4.3 HVM ISO

I've setup a VM running Windows Server 2008 on a host node running Xen 3.4.3-5 and the following kernel: 2.6.18-308.1.1.el5xen #1 SMP Wed Mar 7 05:38:01 EST 2012 i686 i686 i386 GNU/Linux The network ...
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1answer
50 views

Running OpenVPN on Xen node causes guest VM to view all inbound connections as originating from the node IP

I have two node servers running Xen 4.2 -- I'll call them Node A and Node B. Node A is running OpenVPN as the server. Node B is running OpenVPN as the client. Both nodes host a number of Xen guest ...
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74 views

Xen: network between dom0 and domU does not working, while network between particular domUs does

I am unable to establish communication between domU and dom0. I have two domUs and they are able communicate between each other. Dom0 is connected to Internet. I just need network between dom0 and ...
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2answers
281 views

solaris 11 express hosting vm's

I have been trying to wrap my head around this one. I have not seen a decent yes/no or how answer yet. I have a solaris 11 zfs server I want to host 2 or 3 vm's on it and have them use a loop network ...
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113 views

How to configure mkinitfs for stateless alpine linux / xen DOM0 boot?

I am working on setting up a test bed for some Xen development. I have a development server where I can create new builds of xen and push them to the tftp server to be PXE booted on some test ...
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2answers
6k views

Determine which guest is running on XEN: HVM or PV guest

I'm working with a Xen host which is installed XenServer from Citrix by someone. He already installed a lot of CentOS 5.2 guests on the host. I wonder how to check those guests to know they are PV ...
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17 views

Defunct process Rev1112

We were having the following output in top on a Debian box on XenServer: top - 10:00:55 up 10 days, 24 min, 5 users, load average: 126.79, 128.96, 71.39 Tasks: 10382 total, 1 running, 4801 ...
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1answer
91 views

XEN Guest error cannot open display

[XEN - dom0] Ubuntu 12.04.5 server x64bit , using it on CLI Mode - no GUI installed [domU - guest] HVM guest created via configuration file, I Determine the started DomU port attached with : # xm ...
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1answer
804 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
6k views

LVM is reporting I/O errors, but the disk reports no problems. Argh

I've started seeing errors reported by LVM on certain Logical Volumes (and by Xen when attempting to create virtual machines on these LVs). But I've run tests on the disk, and can't see any hardware ...
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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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312 views

Xen VM won't come up: could not find bridge device xenbr0 (configured to use routed)

I am using xen 4.4.1 on an Ubuntu 14.04 server, my DomU is running Ubuntu 14.04 Server as well. I've run this DomU in bridge-mode previously no problems. However I want to switch to a routed setup. I ...
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2answers
31 views

Can I use kernel modules on Amazon HVM/PV instances?

It's a perfectly stupid idea, I know. But I want to test one of my older projects, which includes kernel module (Netfilter extension) on a virtualized cloud-y instance. Will it be possible for me to ...
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2answers
934 views

XenServer Guest PV - Serial Port RS232

Is there any way how to forward (passthrough) physical serial port to XenGuest PV system? I need to be able configure serial device with virtual server on XenServer 6.2. I’m looking for some like ...
4
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1answer
182 views

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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1answer
354 views

failed to run bootloader: -3 on create with xl

I have a Ubuntu 14.04 migrated from Virtual Box Have 3 partitions. I've updated the /etc/fstab for recognize the new partitions and chrooted for update the grub I'm using the following ubuntu.cfg ...
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58 views

xen gentoo domU (Ubuntu 14.04 LTS dom0)

I have a few Ubuntu 14.04 LTS Xen 4.4 servers and I would like to add Gentoo guests. However I am not sure how to do that. Does anyone know where I can review some examples? Also does it have to be ...
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2answers
402 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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1answer
1k views

Ubuntu 14.04 VPS won't boot the latest kernel on XEN

I have a XEN VPS and it's been running Ubuntu for some years now. AUtomatic security upgrades are on and I've manually upgraded it continously and also done releas-upgrades whenever there's been a new ...
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1answer
137 views

Random XEN guests do not boot complaining disk not found

Performed the latest Citrix XEN Server 6.2 updates, skipping anything related to 6.5. Everything seemed normal after fixing GrubConf.py except that a few random Windows Servers would not start. ...
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1answer
480 views

What steps should I take to debug this non-starting hvm virtual machine?

I have a dom0 machine running CentOS 5.4 with all the latest updates using Xen as my hypervisor. I am using Xen in part because this machine was set up prior to KVM being included in RHEL, and in ...
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2answers
1k views

Converting raw image to LVM. Won't mount afterwards

According to this post, it should be okay, to use dd to convert a raw Xen image to LVM. What I have done dd if=/vm.img of=/dev/vg00/vm I can mount vm.img with mount -o loop vm.img /root/tmp. It ...
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81 views

XenServer: run management and data over same LACP bond

I have a XenServer (open source version 6.5) machine with 6 available ethernet interfaces. Is there a way to create one single LACP bond with all interfaces and then run the management network as ...
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1answer
46 views

Assigning a public IP to a Xen Guest machine

On my CentOS server (dom0) I have 4 Ip addresses: eth1 - 56.x.x.100 eth1:1 - 56.x.x.101 eth1:2 - 56.x.x.102 eth1:3 - 56.x.x.103 How can I map eth1:1 (etc) to one of my guest machine? Currently ...
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107 views

Xen server on hetzner with two public up and local virtual network

I use Xen server on my office with a Dell t310 with only one public ip. The public ip is assigned to the router that forward ports to a guestos running endian firewall that route traffic to an apache ...
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0answers
30 views

start Xen DomU automatically when host is rebooted

I have searched the other questions that are similar, but none of them actually provided the answer. The other answers all go down different bunny trails but leave the original question unanswered. I ...
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2answers
413 views

How do I make all Xen guests use their host clock value?

I've set up Xen server under Linux with several guests running, and all was well. After some time I've noticed the clock on the server drifted away, so I installed 'ntpd', and the clock was back to ...
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4k views

use LXC under heavier virtualization (Xen, KVM,Hyper-V,VMVare)

Is it possible to use LXC under heavier virtualization (Xen DomU, KVM, Hyper-V, VMVare) ? I would like to use it as security (isolation) tool, the ability to limit resource consumption is not priority ...