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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Debian Lenny as Xen domU fails to boot

here's the thing: I have Debian Lenny running Xen dom0, and I want to install another Debian Lenny as domU. I followed the guide at Debian Wiki to the letter. Installation goes fine until Debian ...
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3answers
2k views

Red Hat Kickstart: How do I Prevent partitioning?

Hey all, I'm currently working on a new virtualisation setup using Xen, and Centos for my workplace. We intend to deploy the domUs into LVM volumes. Currently, the only thing preventing this from ...
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3answers
9k 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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1answer
787 views

Moving LVM volume group from one physical disk onto another

I'm an out-of-my-depth PHP developer who has to deal with the following sysadmin problem, pronto. We have an Ubuntu (Ubuntu 14.04.1 LTS) server run Xen (xen-hypervisor-4.4-amd64 4.4.0-0ubuntu5.1). ...
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1answer
106 views

Xm setup on SunFire X4200

I'm trying to set a Xen VM on a SunFire X4200. I'm using Debian Wheezy and have followed this guide https://wiki.debian.org/Xen which I used in previous attempts on different servers and worked ...
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1answer
483 views

Using ZFS or XFS on a Xen guest running Linux

Background: I'm investigating the viability of using a filesystem other than ext3/4, with the ability to run snapshots for backup and rollback purposes. The servers under consideration are mailbox ...
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2answers
386 views

Xen VPS not reflecting the RAM upgrade using xm mem-set

I'm trying to upgrade RAM on a Xen VM without reboot. Although it looks working from the host node, the VM isn't picking up the upgraded memory. Upgrading from 756 MB to 1024 MB. Below are the ...
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1answer
532 views

Dom0 not forwarding to DomU

The situation: DomU: Debian SID /etc/network/interfaces auto eth0 iface eth0 inet static address x.x.x.55 gateway x.x.x.49 netmask 255.255.255.255 pointopoint x.x.x.49 Ping DomU -> x.x.x.49 ...
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1answer
259 views

Running commands on FreeBSD Live CD

I'm running FreeBSD 9.1-PRERELEASE on a vps running on XEN virtualization, I tried to update it to 9.1-RELEASE but mergemaster toasted my /etc/master.passwd and /etc/passwd so what i have now is a ...
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1answer
176 views

Access to WAN from one VLAN

i want to create a VLAN for 3 guest VMs. I already have it and every VM can ping each other, but the problem is that any guest CAN NOT have access to Internet Network configuration in Host machine # ...
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2answers
368 views

Randomly crashing Ubuntu 10.04 on multiple Xen VPS host instances

So we have Ubuntu 10.04 running - all 64 bit. Kernel 2.6.36 and 2.6.38-15 are having the same issues. Problem is random VPS servers are hanging. We have about 30 instances with this particular ...
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1answer
370 views

xen and libvirt bridge configuration

I have a Centos 5.5 server with Xen 3.2 and libvirt for virt-manager installed. Before installed libvirt I have the bridge configuration just like the documentation on Xen says: xenbr0, eth0 and ...
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2answers
1k views

Why is OOM killer hitting here

We have some VMs running kernel 2.26.26-2 under xen 4.0.3 with different CPU and RAM amounts and on some seeing almost random OOM events each rendering the VM unusable. Output is as follows, I have ...
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1answer
242 views

Windows Server 2003 guest on Xen frequently stops responding

I'm running a Windows Server 2003 guest instance in Xen 3.x. This DomU runs fine for a day or two, then stops responding — I don't get any network response, and I can no longer connect to Xen's VNC ...
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1answer
588 views

Apache gets stuck while “reading request” and PID takes 100% CPU

Recently, somewhat coinciding with some server upgrades (although there were a variety of things that changed), Apache started ending up with some of its processes stuck in the "reading request" ...
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3answers
3k views

How can I run Rackspace images locally?

As the title says, I regularly download my Rackspace images for backup of my VPS, however I'm wondering if it's possible to run them locally on KVM (for example) so I can run tests on my application ...
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4answers
3k views

Can I virtualize multiple hosts into one virtual system?

I have 5 computer systems in our small office. From my basic understanding of Virtualization technology, I think I can virtualize the 5 systems into one big virtual system. I wish to confirm this. ...
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2answers
2k views

Dedicated memory for Xen dom0?

How to assing the dedicated memory for the xen host system dom0 permamently and how to preventing dom0 memory ballooning ? also what is the minimum memory need for the xen host dom0 when it as already ...
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1answer
509 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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1answer
488 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
401 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 ...
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2answers
1k 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
250 views

Location of vm data on xen center

I can't find the vm data (metadata files, disk images) mounted anywhere on the xenserver server. Where is it located, and how can I reach it from dom0?
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2answers
2k views

Can I give a virtual machine a unique ID which is accessible from inside the VM?

I want to be able uniquely identify my virtual machines from inside the virtual machine. The problem is that in my setup I cannot use the MAC address for that. Is it possible to configure another ...
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3answers
875 views

Web-based Ajax Console for Xen DomU?

I tried rapidxen once. They provided a web-based ajax terminal webpage, which displays tty0 on the webpage and you can type command on that webpage. It interactive with domU in ajax way, the webpage ...
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2answers
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XEN Server VM Creation Error

Has anyone seen this before and this recently started occurring when a VM boots. 4/7/2011 11:53:08 AM Error: Starting VM 'Web Server 1' - INVALID_SOURCE - Unable to access a required file in the ...
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2answers
1k views

Xen HVM guest has severe clock drift

I am seeing a very severe clock drift on my Xen HVM VPS, rented from a hosting provider, so I don't have access to the dom0 system. I continuously run ntpd, but the clock drifts by as much as 30 ...
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1answer
3k views

Disk IO causing high load on Xen/CentOS guest

Background I'm having serious issues with a xen based server, this is on the guest partition. It's a paravirtualized CentOS 5.5. I'm not sure if it's hardware or software related, or in between ...
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2answers
2k views

How to setup a fast VPN server

I am trying to set up a VPN that has a fast download speed. The server I have is a linux server and from there I can download 2 megabytes a second. At home I can also download with 2 megabytes a ...
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1answer
999 views

Comparison of Hyper-V, Hyper-V Server, VMware ESXi, Xen and Parallels Bare Metal (Community Wiki)

Can we use this question to collect information and the pros and cons of each of the above products? Specifically I am wondering whethere there is any sane reason to use Hyper-V (the role built into ...
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1answer
515 views

Can Xen be configured to dedicate only one port of a dual-port NIC to a domU?

I'm using CentOS 5.4 on my dom0 with a stock Xen kernel. I'm attempting to use the pciback module to hide some of the Ethernet ports from the host and reserve them for a domU I intend to use for a ...
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4answers
626 views

“xm save” fails on kernel.org domU with Xen 3.4.1

I've installed Xen 3.4.1 from source. Some of my paravirt domUs use the official XenLinux kernel (2.6.18) and some use the mainline kernel.org. When I run "xm save" on the kernel.org guests, the "xm ...
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2answers
852 views

Live Xen snapshotting?

If I use xm save domain dumpfile, this pretty much accomplishes what I want to do. However, this does cause some downtime, and I really don't want to close network connections or take the machine out ...
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3answers
542 views

Constantly varying download rate with a complex xen networking setup, why?

The network configuration in my Xen setup is the following: the dom0 has 3 network cards (eth0, eth1, eth2), 3 brigdes (xenbrE, xenbrI, xenbrD) and each brigde integrates the corresponding network ...
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3answers
887 views

Which hypervisor to play nice with docker.io

I have been running several different virtualisation servers, (ESXi, XenServer, Proxmox/KVM) in the past. I am now in a position where I need to set up a new virtualisation environment that is ...
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1answer
1k views

Whole block device named xvda1, xvda2 instead of xvda, xvdb

I am working on a VM that was set up for me in a public cloud. It's running under the Xen hypervisor in paravirtualized mode and has two virtual disks. So I expect the virtual disk block devices to be ...
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1answer
312 views

Xen Dom0 could not find boot device (or any disk)

I have a brand new DELL server running SLES11 SP1 where I am trying to install my very first Xen Hypervisor. So I installed "Hypervisor and Tools" via YaST (excluding graphical elements), which ...
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2answers
876 views

Error running xe sr-create

I'm trying to add a new SATA drive (SSD) as a local SR. XenServer may have seen the drive before, but I don't recall every doing anything with it. I'm attempting to run this command: xe sr-create ...
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1answer
73 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 ...
2
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1answer
151 views

xm re-create configuration file from existing vm

I have Xen set up and working quite nicely. When I reboot and use: xm list I get this output: Name ID Mem VCPUs State Time(s) Domain-0 ...
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1answer
647 views

I can't mount a LVM snapshot on a XEN host

I'd like to backup my XEN VMs by copying-rsyncing a LVM snapshot. I'm trying to mount a snapshot that contains a XEN guest's virtual disk (ext4). Below are all the steps I follow. I can't mount the ...
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2answers
424 views

Clustered file systems as XenServer storage

I want to use shared storage for a XenServer environment with 4 host servers which are running various VMs under XenServer. Planning to use 2 extra servers as storage with high availability of some ...
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2answers
242 views

How to figure out disks performance in Xen?

So, I have a Dell R710 with PERC 6/i Integrated and 6 450Gb Seagate 15k SAS disks in RAID10, I have 30 Xen vps working on it. Now I need to deploy second server with same hardware for same tasks and I ...
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1answer
1k views

How to run .ova appliance on Debian Squeeze XEN host?

I have a virtual appliance in a .ova format, but I need to run it on a XEN host. Xen host is running Debian Squeeze. How can I do that?
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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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2answers
189 views

Xenserver: One VM crashed, xe not reacting any more

We are running a xenserver. One VM crashed, the other VMs seem to run normally. But now we can not restart this VM any more. Not even xe-toolstack-restart is showing any reaction any more. We do ...
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1answer
306 views

Busy Debian server (Xen guest) seems to go to sleep (energy saving mode)

I have a Debian 6 Xen guest that seems to go to sleep from time to time. Randomly, it just stops to answer to any network requests (HTTP, ssh, ping) and only resumes activity when we log on the ...
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0answers
107 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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1answer
491 views

Xen HVM Windows 2008 network bridge

I have a problem with the Windows Server 2008 guest (hvm). I can't get a network interface running for him. I also have a Debian guest and it's working ok, but I can't do it with the Win2k8 guest. ...
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0answers
510 views

My Xeon Processor supports VT-x, is it compatible with Xen? [closed]

While looking for a server to run Xen I stumbled across a barebones setup which comes with an Intel Xeon L5420 on the SuperMicro X7DCA-L motherboard. Doing a bit of research I found the processor ...