XEN is a hypervisor based virtualization technique.

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2answers
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Mounting LVM2 volume gives me 'mount: you must specify the filesystem type'

I have a LVM2 Volume Group 'vgXEN' with a Logical Volume in it called 'test-disk'. This is the output of lvdisplay: --- Logical volume --- LV Path /dev/vgXEN/test-disk LV Name ...
3
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1answer
1k views

Booting from ISO in Xen Paravirtualized Environment

Specifically, Citrix XenServer 5.6. I can map the an ISO from a Storage Repository with no issues and mount it inside the OS but I can't boot from the DVD drive without converting it to HVM, which ...
0
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1answer
173 views

Xen crashes when loading X

I installed debian-7.1.0-i386-kde then apt-get install various Xen stuff. After updating Grub I found it boots up using Xen however at the point where it tries to draw my desktop (KDE) I get a bunch ...
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0answers
138 views

benchmarking ftp in 3 methods of virtualization

My Bachelor Final Project is about benchmarking visualization methods with ftp, web and mysql services: installing Debian on xen (para-visualization) kvm and lxc with equal resources config (equal ...
6
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0answers
422 views

Allocated Memory difference in xen guests after using Linux 3+ kernel [closed]

Can someone explain to me why there is a memory difference in Guests with the same configuration? Hypervisor: xen 4.2 64 bit VM1: Centos 5.7 with 2.6.18-274.el5xen Assigned memory from xen is ...
3
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1answer
379 views

Open luks-encrypted partition from virtual DomU LVM disk containing another LVM

I've gotten myself in a bit of a bind, here. A while ago I set up an encrypted Unbuntu 13.04 under Xen. It's virtual disk is an LVM LV. This LV was presented to the DomU as a (whole) physical disk ...
2
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2answers
239 views

Moving a Xen DomU to a new block device

I am busy replacing the (SAN attached) storage configured for this XEN host. Is there some way to "move" the domU from one block device to another on the same host, possibly something similar to live ...
1
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1answer
1k views

libvirt daemon doesn't start on Gentoo [closed]

I'm trying to use Xen with virt-manager on Gentoo system and I have some troubles with libvirt daemon. When it starts: Starting libvirtd ... /usr/sbin/libvirtd: error: Unable to initialize ...
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2answers
1k views

Linux-distro with built-in Xen?

Are there any Linux-distros with Xen "built-in" and ready to act as host for virtual-computer out-of-the-box? Alternatively, distros where you can easily select "Xen-host" as an install option? I'm ...
1
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1answer
150 views

Scrambled Xen Console on dom0

I installed Xen using the recommended procedure on Ubuntu's site using motherboard Supermicro X7SBL-LN2 and Ubuntu 13.04 amd64. After the installing it and rebooting my console looks like this: ...
4
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2answers
8k views

ext3 root filesystems goes read-only with aborted journal even after repairs

Short version: ext3 root filesystem on rackspace (xen) VM detects aborted journal on boot and mounts read-only. I've attempted to repair this from a rescue environment with tune2fs and e2fsck as ...
0
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1answer
165 views

Crash analysis and 4 levels of page table

I am having xen 3.4.2 running with 15 vm (pv+hvm) on a host with 256 Gb RAM and 96 core CPU. But recently my host crashed on debug log its showing translating ffff83183fcb0000 with CR3 100ae42000 ...
19
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1answer
22k views

BUG: soft lockup - CPU# stuck for x seconds

I've seen a few bug reports and questions (on stackexchange and elsewhere) regarding a nagging "BUG: soft lockup - CPU#<n> stuck for <dt>s!". So far, I haven't found any clue as to what ...
13
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3answers
903 views

Horrible situation - file systems mounted simultaneously by multiple independent OS instances

How do I get out of this situation safely? Details are as follow: A xen server has got block devices allocated to VMs. But these devices have also been mounted inside Xen. In fact 44 of these ...
1
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2answers
2k views

Xen: Migrating LVM-based machines from Xen Opensource to Xen Cloud Platform

we have several LVM-based VMs running on a Xen Opensource host. "LVM-based", in our case, means that there's a LVM volume for the root partition and another volume for the swap partition. The kernel ...
1
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0answers
961 views

Use dd to backup disk image within an OpenVZ container

I want to use dd to backup the disk of an OpenVZ VPS in addition to traditional cold tar backups. Because I may need to migrate to a different VPS provider. From end user point of view, OpenVZ ...
2
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0answers
657 views

Xen is unable to use URL's to install CentOS

I can't seem to use URL's when using the netinstall for CentOS, I'm installing CentOS on a Xen VPS. I keep getting this error in the terminal window, when I use the URL: ...
2
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0answers
281 views

XEN Bootloader or Kernel error bootloader isn't executable / cannot locate kernel when using XM create

I am currently using Xen for installing VM guests however whenever we run xm create -c /etc/xen/ks.test.cfg we get; Using config file "/etc/xen/ks.test.cfg". Error: Bootloader isn't executable ...
1
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1answer
257 views

Xen error on CentOS

During the creating of a new virtual server in xen using this command xen-create-image --hostname=minecraft.koanhosting.com --ip 87.98.249.146 --install -method=debootstrap But I keep getting this ...
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1answer
2k views

Guide to installing Xen on CentOS 5.9 (That is still valid)

I need an idiots guide to installing Xen Hypervisor on CentOS 5.9 We attempted to install it on 6.3 before, but completely failed, so we reverted to 5.9 to see if we had more luck. We had issues ...
0
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2answers
304 views

Create a CentOS Guest img over Ubuntu

I want to create a basic CentOS 5.8 system from scratch. for now i build my own img for Ubuntu Guest (debootstrap), my host is a Ubuntu 12.04.1LTS but I don't know how to make for a CentOS, is ...
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3answers
3k views

XEN Storage Repository has option type=lvm missing (XCP)

Several online documents on this subject talk about creating an SR with the option type=lvm but trying these: # xe sr-create type=lvm device-config:device=/dev/server/sr_guest1 name-label=sr1 ...
6
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2answers
1k views

How do I configure Xen GPU passthrough for my AMD Radeon GPU?

I have an Ubuntu Server 12.10 setup with Xen 4.2.0 installed (compiled from source) and an AMD Radeon 7750 GPU. My Xen installation appears to be working and I can create virtual machines for example. ...
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0answers
1k views

PCI passthrough with Xen

I am trying to run Windows XP in a Xen DomU virtual machine with a PCIe device, for which there are no Linux drivers, being passed through from a Debian Squeeze Dom0. My hardware supports ...
0
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1answer
1k views

Xen / Grub2 - Domain 0 allocation causes boot panic

Current setup / versions : Ubuntu Desktop 12.04 Linux 3.2.0-32 Xen 4.1-amd64 Grub2 After following the documentation to set up xen-hypervisor-amd64 and configuring grub2, when I reboot I get the ...
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2answers
2k views

Xen, bridge and multiple IPs on CentOS

There's a new server that is assigned 5 IP addresses. I want to use Xen to run several VMs with various services. This is my first attempt to install Xen, I use this tutorial as a guideline. Stuck ...
4
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2answers
3k views

What is /dev/xvde1?

I'm having to do with an OpenShift RHEL Linux installation running on Amazon EC2. In the filesystem, there is a device file named /dev/xvde1 mounted to / ... and a device file named /dev/xvde2 mounted ...
4
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2answers
431 views

How to backup entire xen dom0 (on debian)

How do you go about creating a bootable backup ISO of my computer (dom0)? I have tried remastersys and this backs up everything but Xen does not work properly. LiveCDs also do not work. Does ...
3
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1answer
4k views

Why would my Linux host suddently stop receiving multicast? All other nics on private network are receiving

Here is my dilemma. Suddenly, as of yesterday, multicast packets are no longer being received from eth1 (private gigabit network) from one node. Routing between all the nodes is fine, no collisions, ...
1
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1answer
74 views

vpn conntect over an additional server

I (A) want to connect to my virtual XEN-server (B) with Ubuntu OS via vpn. This server (B) should than connect to another server (C). The traffic should be routed from A to C. C is using CISCO VPN. ...
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2answers
1k views

Different Kernel in DomU than in Dom0 on xen

If my Dom0 on Xen is kernel 2.6.18 with xen 3.3.1 can i boot a, say, 2.6.34 kernel in a DomU ? Background: 2.6.18 runs like a charm on Dom0. Don't want to update here, because there is special ...
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2answers
2k views

Tools for Monitoring Steal Time (st)

We're running on a virtual "dedicated" server, which should, in theory, mean that we're the only guys on the server. In practice.... I'm thinking we might not be. Notice that although it looks ...
0
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1answer
1k views

how to make a large ISO storage on xen cloud platform (XCP) or XenServer

i've downloaded XCP 1.5 beta from http://www.xen.org/download/xcp/index_1.5.0.html. i've managed to install it too. my physical system specifications are 3.01 GHz i7 24 GB Ram 3 TB HDD now i would ...
2
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2answers
7k views

telnet to localhost and loopback device IP works, but not LAN ip (Xen + Ubuntu)

I have set up Xen + Ubuntu per the instructions at https://help.ubuntu.com/community/XenProposed. I am now ready to install a HVM guest OS (Ubuntu Desktop 12.04). After I start my HVM guest OS xen ...
5
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3answers
10k views

domain 'ubuntu-hvm' does not exists, xen + ubuntu, hvm guest os installation problem

I am following the installation/setup instructions at https://help.ubuntu.com/community/XenProposed to install ubuntu + xen. I was able to install a PV guest OS. However, when I got to the HVM guest ...
2
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2answers
433 views

What to do when ubuntu-vm-builder completed?

I already have the VM (Xen based) installed, but the Xen config used specified "Linux kernel" as "None". The exact command line was: ubuntu-vm-builder xen precise -v --debug --addpkg openssh-server ...
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1answer
750 views

Difference between Oracle VM and Citrix XEN?

I`ve been testing Oracle-VM this day. Is there anyone out there who has tested both XEN-based solutions? What are the main differences?
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1answer
2k views

How to increase Xen guest CPU utilization?

My Xen dom0 is a Gentoo x64 pvops. I boot my guest Gentoo, in PV mode, system with the same kernel my dom0 uses. When I emerge in the guest system, building a CPP package, I am experiencing low CPU ...
4
votes
1answer
802 views

Xen domU fails to start with kernel panic

My dom0 is Gento 3.3.2, the kernel is compiled with Xen support. And I am planing to use the same kernel to boot my domU. This is my domU configuration file: 1 vif = [ 'bridge=xenbr0' ] 2 vcpus ...
2
votes
1answer
825 views

Learning how to build my own linux kernel

Reference - http://www.linode.com/wiki/index.php/PV-GRUB#Building_Your_Own_Kernel In order to work with Xen, a number of options that must be selected: CONFIG_PARAVIRT_GUEST=y CONFIG_XEN=y ...
2
votes
1answer
3k views

PCI passthrough without VT-d

My CPU is Intel T9300, it supports VT-x, but it does not support VT-d. I am using Xen pvops virtualization. I have a PCI device, and my host system can work without it. So I am thinking if it is ...
4
votes
2answers
973 views

VM benchmark tools?

I would like to benchmark of few XEN-constallations: PV DomU HVM DomU with PV network and disk drivers HVM DomU with emulated IDE and PV network The base will be the same VM with the same ...
3
votes
2answers
3k views

no network on domU in network-bridge configuration for Xen-4.0

I created a very standard Xen-4.0 domU with network-bridge configuration. However, no packets get out from the virtual machine to the network which bridge (peth0) is attached to. From guest I can ping ...
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2answers
437 views

Mysterious write IO

I am just reviewing the disk IO of a XEN VM server. I stumbled across a DomU that has constant write traffic. To narrow that traffic further down I logged in to the DomU (CentOS 5, 64 Bit) and ...
4
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1answer
2k views

Running xen inside VirtualBox , possible?

Can i run a Linux system inside VirtualBox or VMware , with xen kernel ? It's not intended for a real server or production workplace , just to learn the configuration of XEN. BTW: target computer ...
4
votes
2answers
9k views

Unable to boot VM: Error 13: Invalid or Unsupported Executable Format

I used VMWare vConverter and everything converted fine, but when I try to boot I get an error: The physical machine boots correctly, so I don't think it is a source machine issue. I am not sure why ...
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1answer
987 views

What kind of installation should I choose from CentOS to have it as dom0 xen host?

I want to have CentOS 6.0 x86_64 as a dom0 xen host. During the installation of CentOS there are many options for installation: "minimal" "Basic Server"... "Virtual Host".. The question is: which one ...
3
votes
2answers
177 views

Live-migration of a SLES9 DomU?

With SLES9 SP4 we managed to set up a XEN PV DomU. We are using SLES10 SP4 as Dom0 and DRBD 8 as disc-backed: a drbd-device corresponds to xvda in the DomU. The DomU uses the xenblk and xennet ...
2
votes
4answers
1k views

OpenSolaris vs. Debian for Xen Hypervisor VM server

all. I've just purchased a computer that I'd like to repurpose as a lab server. It's a six-core AMD processor with 8 gigs of ram (16 gig max) and a terabyte hard drive. My idea is to hose Windows, ...
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2answers
7k views

XenServer how can I shrink the virtual drive of XenServer domU?

How can I shrink the virtual drive of XenServer image?. I gave 300Gb of space for one image (domU) and that was mistake. Now I want to shrink it. How can I do that? The system is already set up and ...