XEN is a hypervisor based virtualization technique.

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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 ...
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1answer
115 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 ...
13
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1answer
13k 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 ...
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3answers
751 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 ...
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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 ...
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0answers
696 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 ...
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0answers
530 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: ...
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0answers
242 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 ...
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1answer
217 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 ...
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2answers
228 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
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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 ...
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2answers
984 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. ...
3
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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
997 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
1k 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 ...
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2answers
2k 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 ...
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2answers
354 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
3k 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
72 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. ...
2
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2answers
857 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 ...
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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 ...
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2answers
5k 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 ...
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3answers
9k 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
399 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
650 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 ...
3
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1answer
665 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 ...
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1answer
711 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
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1answer
2k 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
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2answers
821 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 ...
2
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2answers
2k 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 ...
6
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2answers
404 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
1k 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 ...
3
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2answers
7k 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
809 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
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2answers
174 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
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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
5k 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 ...
6
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1answer
3k views

Xen on openSUSE 11.4

I have done a few installs of openSUSE to use as a Xen dom0 and have not got it working yet. These are the steps I followed: Installed openSUSE 11.4 from Live KDE CD. Installed all updates via ...
6
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1answer
1k views

Force X to use second video card so I can pass through first card to XEN VM?

So I am trying to get X to start on my second (PCI 02.00:00) video card and stop using the main card (PCI 1.00:00). I would like to do this because I want to pass through the PCI 1 card to a XEN HVM ...
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2answers
376 views

Multiple dom0's on a single Xen host?

I've recently been researching Xen, and this has come up as a quistion for me. Is it possible to have more than 1 dom0 running on a single Xen host? The reason I ask is that this is very similar ...
5
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1answer
480 views

Linux process scheduling - Cap/Weight based?

I am just trying to understand the basics of Linux scheduler. Is Linux scheduler a Cap based or weight based scheduler? I was previously using Xen. Now I am moving from Xen to KVM. I read VMs are ...
2
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1answer
688 views

Can rpm handle an install of another OS into another Logical Volume?

I am trying to install fedora as a domU under a CentOS dom0 using the method outlined in The Book of Xen. I have asked another question regarding a consistent error message of cpio: Bad magic when I ...
2
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1answer
5k views

Getting “cpio: Bad magic” when trying to rpm install into a mounted Logical Volume

I need some help with this. I am trying to follow the Xen guide to provision a domU using package installation of the Fedora 15 release (the dom0 is CentOS 5.6). Ive run the rpm install command with ...
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1answer
4k views

What is Dom0 and how can one use it?

I have heard that Xen is now fully included into mainline Linux, and is usable via Dom0. Bare with me: I'm no expert on virtualization, let alone virtualization on Linux. What is Dom0, what is its ...
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2answers
550 views

Seamless mode in XEN?

Is there a seamless mode for XEN like the solution for VirtualBox? UPDATE: under e.g.: having Ubuntu 11.04 as dom0. With seamless mode I mean to integrate the guest vm's window[s] to the host's GUI.
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1answer
481 views

What is a cheap Citrix XenServer build?

Was wondering if anyone knew of a cheap XenServer build. Want to build two hypervisors using Citrix XenServer (based on open source Xen project). I was hoping for at least 8gb of ram on each and ...
5
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3answers
1k views

What is the fastest Virtualization solution for Linux?

Is it still XEN? Or is it VirtualBox, KVM, VmWare or else? With fastest I mean that the guest VM is fast (the smallest speed loss because of Virtualization)