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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PCI DSS compliance on a virtualized server running Xen

I have a server running xen with HVM and would like to make one VM PCI compliant. I've read the PCI virtualization guide and it says that I need to make sure there is no information leakage between VM'...
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4answers
882 views

Network traffic accounting of Xen VMs

How do I monitor network traffic usage on Xen virtual machines running on Debian GNU/Linux Squeeze? I have a number of Xen virtual machines (domUs) running on a few physical machines (dom0s). Each ...
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1answer
431 views

On-line backing up Xen virtual machines running on Ext4fs

What methods exist for backing up Xen virtual machine contents? I have some virtual servers running on LVM / Ext4 disks. Preferably a method which can be directly executed over SSH / network ...
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1answer
4k 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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2answers
2k views

How to Manually Xen bridging setup on OpenSUSE for two DomU

I've been having problems with Xen networking on OpenSUSE, specifically with getting Dom0 opening a TCP connection to the DomU. Other machines on the network can open TCP connections to all 3, so I'm ...
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1answer
68 views

Hypervisor to have VMs for users logging in/out of the host machine?

I'm looking for a solution for the following workflow: Let's say I have 4 dedicated users on my CentOS box dedicated for QA purposes. This box has a hypervisor running 4 separate VMs concurrently, ...
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1answer
925 views

Ubuntu 10.04 (LTS) DomU on Debian Wheezy Dom0 Xen 4

I have been forced to move from a Centos Dom0 xen 3 Centos + Ubuntu Lucid DomUs To Debian Wheezy Dom0 Xen 4 Ubuntu Lucid DomUs However although I can create new DomUs on wheezy I cannot ...
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1answer
392 views

Pacemaker behavior colocation Xen domU resources, is this expected?

I am using Pacemaker+OpenAIS+Corosync on OpenSuSE 11.3 running Xen, and am trying to determine if the behavior I see when colocating Xen domU resources is expected or not. Cluster nodes / dom0: xen01-...
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5answers
3k views

Xen only sees 512MB of System RAM. Should be 8GB. (UEFI boot)

I am booting Xen 4.0 from Debian Squeeze, kernel 2.6.32-5-xen-amd64. "xm dmesg" on dom0 shows: Xen-e801 RAM map: 0000000000000000 - 0000000000091400 (usable) 0000000000100000 - 0000000020000000 (...
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2answers
160 views

Xen: how to limit IPs for VMs

How can i limit Xen VMs so that they only work with some specified IPs? Eg.: vm01 should have IP 192.168.0.2. If it tries to change to another IP, it will simply not work and vm will lose ...
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3answers
2k views

VNC connection to EC2 instance without installing a VNC server

I was wondering if it was possible to connect to an Amazon ec2 instance via VNC, but instead of installing a VNC server in the target machine, somehow connect it to the hypervisor's graphics output ...
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2answers
1k views

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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4answers
792 views

A better inexpensive 2 node cluster

There is a Xen cluster that setup that I really like. It consists of 2 nodes (let's call them 1 and 2). Each node has 2 non-raided drives (A and B). A1 replicates to A2 through DRBD and B2 to B1. ...
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1answer
640 views

virsh slow execution

I'm using libvirt with Xen 4. Every time I use the virsh tool, it takes a long time until it's started. I start virsh on the same machine where the Xen hypervisor resides. Example: root@xen1:~#: ...
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2answers
170 views

Turning physical linux server into several virtual servers [closed]

I'd like to create several virtual servers (all running linux) on my physical server. All of them will be used as headless servers - ie. they'd be the equivalent of an EC2 instance but running on my ...
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3answers
1k views

All Xen domU LVM volumes corrupt after reboot

I'm running a Debian Squeeze dom0, and after rebooting it all 7 of my domUs have data corruption. Each is setup as ext3 partition directly on a separate lvm2 volume. None of the lvm volumes will mount;...
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1answer
176 views

DIY: automate cloning of Xen VMs, gold templete?

looking for DIY way without commercial tools like XenServer LabManager product.
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1answer
2k views

AMD Fusion GPU passthrough to KVM or Xen

Has anyone successfully gotten a passthrough working with the GPU portion of AMD's Fusion APUs (the E-350 is my target) on top of a Linux hypervisor? IE, I want to dedicate the GPU to one VM only, ...
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3answers
1k views

Domain-0 high CPU load

My Xen HVM machine has 4 cores on 2.4 Ghz however top gives me a load of 2-3. There are running 20 VM's on it (most of them are idle). The HDD is also almost idle (200 KB/s write and 6 KB/s read). ...
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1answer
255 views

xen domUs crashes or unavailability

I've xen server with 8 domU. Server is Xeon E31270 with 16gb ram. I think it is enough for 8 machines. Sometimes domU's crashes and i can't figure out the reason. After crash i can connect to console ...
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1answer
791 views

How do I install xen hypervisor + linux onto a usb memory stick

I'm wanting to create a bootable Linux + Xen Hypervisor on a USB stick. I have it working how I want on a hard drive but for cloud deployment I'd like it to boot xen to a ram disk and mount the ...
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2answers
2k views

Xen host and guest sharing same IP

Is it possible for both Xen host and Xen guest to share same IP (albeit with different ports)? We have a single public IP, and want to have both the Xen host (as host only, no other role) and the Xen ...
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2answers
253 views

Free virtualization system with clone vm feature

I need virtualization system, based on kvm or Xen with Web interface, or windows gui, which support cloning vms. One more point is that I can not install it from iso (server is located in hetzner). ...
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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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3answers
531 views

netconsole or serial logging in XenServer DomU

I have some problems with stability of Debian guests in my XenServer hosts. To debug this problem I wanted to use netconsole kernel module, unfortunately, because the Ethernet controller is emulated, ...
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1answer
5k views

How do I tell real CPU load in a xen environment?

I have a Debian machine with 4 CPU cores running Xen with two virtual machines, and I'm having trouble determining overall real CPU usage. Each machine has two VCPUs assigned to it with no cap on CPU ...
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2answers
2k views

Howto resize Xen virtual host disk size on Debian?

I am using a loop device disk setup (not lvm) for Xen Debian (squeeze) guest systems on my Debian (squeeze) host system. I searched for a way of extending guest system disk size. I came accross ...
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1answer
587 views

How to forward OpenVPN Port to NAT'd XEN domU

I want to install a OpenVPN domU on XEN. Dom0 and domU are running Debian Squeeze, all domU are on a NAT'd privat network 10.0.0.1/24 My VPN-Gate is von 10.0.0.1 and running. How can I make it ...
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1answer
113 views

Xen DomU: jfs support

I have a domU that I plan to use the standard xen-kernel of my dom0 (Xen 4, Linux kernel 2.6.32-5-xen-amd64). On this domU I want to make all partitions jfs. (currently I am working in a testing domU ...
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1answer
469 views

Multiple Xen instances through 1 single IP

I am a developer with not much networking experience, here is my situation: I have a server with one reputable provider, managed to get Xen running with lots of LVM space to get around 3 virtual ...
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1answer
866 views

Xen Disk Performence Issues

I'm currently using Xen PV on CentOS 5 with my domU's as flat files running on a hardware RAID controlled (write cache enabled) formatted with XFS. On the dom0 I can get about 500MB/s in a 2GB dd ...
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0answers
909 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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2answers
211 views

What is a good way to develop images or templates that can be used on Xen, KVM and EC2?

I want to make images to do simple network services (e.g. serve a web app, run a memcached, or whatever). It would be really nice to develop an image once, test locally, and then be able to deploy it ...
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2answers
19k views

xvda1 is 100% full, What is it? how to fix?

I'm running a Linux instance on EC2 (I have MongoDB and node.js installed) and I'm getting this error: Cannot write: No space left on device I think I've tracked it down to this file, here is the ...
2
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1answer
568 views

SLES 10 SP1 domU eth0 not up at boot

I have a SLES 10 SP1 domU on a SLES 11 SP1 dom0 for the purposes of a build server. After moving around some file systems, when I rebooted the domU, the networking no longer worked. When logging in ...
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1answer
1k views

Xen VM won't start: “Cannot plug VIF”

I've got a VM on a citrix xenserver 5.0.0 machine that won't start. it was running fine until it was rebooted on a Fri afternoon, a few weeks ago. Starting it from the (windows-only) xencenter GUI ...
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0answers
151 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" kernel;...
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1answer
357 views

pv_ops Kernel ignoring cpu hotplug under Xen 4 DomU

I have a Xen 4.0.1 DomU running Debian Squeeze with the stock 2.6.32-5 Kernel. When I add CPUs via xm-vcpu-set they correctly show up in /sys/devices/system/cpu but are not set online and ...
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1answer
553 views

top vs vmstat on Debian squeeze/xen

I'm running a squeeze DomU on xen 4.0.1 which is completely unloaded. I notice a difference in cpu states between iostat and top like: top (in every iter): Cpu0 : 0.2%us, 2.0%sy, 0.0%ni, 94.2%id,...
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2answers
2k views

Advice on most fitting choice of virtualization platform: Xen | OpenVZ | KVM | other? What suits the purpose best?

I am aware of the multitude of virtualization threads here but they all seem to be oldish and i'd like to have a brand new one ready for 2012. I'm currently evaluating Xen, OpenVZ and KVM for ...
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1answer
9k views

How to convert Xen image to VirtualBox?

I have some open-source Xen images (.img), that I want to convert to VirtualBox. Both the methods I tried (convertfromraw or to .xva via xva.py then to ova via XenConvert) produce FATAL: Fatal: No ...
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3answers
530 views

How do I log console output from a XEN VM?

I have a xen hvm vps with a console thats accessible using VNC. I'm wondering if there's any way of logging anything/everything that is sent to console? I'm trying to log the console cause my vps ...
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1answer
109 views

what are the alternatives (OSS,commercial) for virtual machine life-cycle management? [closed]

likes of VMware lab manager: desired feature list: Self-Service: rapid-delpoy-VMs configuration management: clone, snapshot VM good to have: hypervisor agnostic storage lease user access - ...
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3answers
2k views

Can't connect to remote Xen libvirt with ssh, using virsh or virt-manager

I'm running Xen 4 on a Debian server running Squeeze (stable). I want to connect remotely over ssh using virt-manager or virsh, because I can do that on a Lenny server (oldstable). Xen is installed ...
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1answer
432 views

Libvirt: create a network bridged to the LAN (eth0)

I have a Xen-enabled host and Libvirtd running on a machine. The LAN (on eth0) is 192.168.1.0/24, and the host has 192.168.1.174 as its main IP address. Now what I want to do is to create a domU ...
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2answers
1k views

My VPS crashed and I have no idea why

I have a VPS with Linode right now. I was alerted by my monitoring service that a site I was hosting had gone down. I used Lish, Linode's method of getting direct out-of-band access to the console ...
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1answer
663 views

xenbr1 dissappeared after server reboot

I'm running a Xen 3.0 server and after rebooting it, the xenbr1 networking bridge never came back. Both eth0 and eth1 are running fine and all the IP addresses are present, however it looks like it ...
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2answers
102 views

Storage for a small XenDesktop deployment

We are currently looking for a server-side virtualization solution for our developer desktop-systems. We so far chose XenDesktop since we are already running Xen for virtualized servers. This is a ...
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1answer
217 views

xen cluster multiple nodes

I'm looking for information on how to build a Xen HA cluster with multiple nodes. I find lots of information on how to build clusters with two nodes, but that is really not enough. I've built one with ...
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1answer
483 views

Equivalent of xen capping in kvm

I have been using xen hypervisor. I use the credit scheduler and make use of capping in credit scheduler. Now I am migrating to KVM . Is there any good equivalent of that VM capping in kvm ? Any help ...