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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Cloud, grid, xen, performance [on hold]

I have some problems on my grid. I have 5 servers on it, running xen, but somehow, the IO on one of the machines (SQL server) are running extremely slow. But not just on VM, but on the servers too ...
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54 views

Can I send other commands to xenserver to control VM?

I'm very sorry, I described the problem is unclear, had to use pictures to describe. As you know when shutdown the VM ,the whole process is: My question is Can I send other commands to xenserver to ...
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1answer
18 views

Xen Server 6.2 Upgrade to SP1

I installed Xen server 6.2 and I am currently playing around with it. I managed to install 1 vm, and I have applied all hotfixes available up to the Service Pack 1. That specific patch gives me an ...
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23 views

FreeBSD 10 on Xen HVM [closed]

I have a XEN HVM Virtual Machine, that I bought from a hosting provider. (I do not have host access) I want to install FreeBSD 10 on it. I wanted to know what are the appropriate settings to use in ...
2
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1answer
31 views

Are the xen xe commands available on Oracle VM 3.2?

I recently discovered that Citrix has opensourced XenServer, and that XCP (which we have been using) is more or less now legacy and needless. While looking at rebuilding our systems on XenServer 6.2, ...
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7 views

Are Xen 4.1 virtual machines compatible with XCP?

I have a couple of vm installed with Xen 4.1 (basic Xen Hypervisor), now I would like to install XCP packages on my wheezy server. I've read that XCP took control of the server disks and network ...
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62 views

Open Xen Manager and XenCenter server connection

So, I've got server set up and running the Xen hypervisor version 4.1 with Debian Wheezy (7.5.0) as the host OS, along with xcp-xapi and all relevant services are running correctly. Problems arise ...
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37 views

Resize a logical volume of an LVM inside another LVM (Xen Dom0)

I have a Xen guest, which its main disk is on an LV (let's call it "domu-disk", VG name "xen"). It's on one single 1T drive at the moment. Inside that domu-disk, it was partitioned into one primary ...
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26 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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11 views

xen: domu require more memory than mem-set size

Assume that we have install two guest os in xen, named dom1 and dom2. Now, I start the dom1 and dom2, and both are configured with max-mem=4096M; note that my physical memory is 16GB. While dom1 and ...
1
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1answer
66 views

All connections to a bridged domU originate from the dom0 public IP instead of real IP

I have a Dom0 with a mixed configuration: bridged networking and NAT is set up. There is one NIC connected to the internet (& 3 more that are unused). This is my interfaces file: # The primary ...
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52 views

XenServer Console

I just follow this tutorial to access XenServer Console. I can run the first example, and it's working fine, but for the second example it's not working. I cannot access to console with a java ...
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2answers
39 views

How to I forward requests on a IPv6 port to a IPv4 host behind NAT?

I run a Xen Dom0 with 2 VMs NATted (other VMs are bridged, and are ok). This Dom0 has an IPv6 and IPv4 address. Requests to, for example port 25 are forwarded to a LAN address that one of the VMs ...
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1answer
28 views

Xen: 'this operation could not be performed' (VDI is in use) error?

How do I resolve the error: This operation could not be performed because a VDI is in use by some other operation I see this when trying to (re)start a stopped VM.
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1answer
13 views

Xen: 'this operation cannot be performed' (virtual disk not found) error?

When trying to start a VM: This operation cannot be completed because the specified virtual disk cannot be found How do I work around this error?
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1answer
39 views

xen server 6.2: lost a VM when moving?

I have three servers in a HA group (Xen 6.2). I've been doing some firmware updates which require rebooting so I've been shuffling VMs around to minimize disruption. One of the VMs seems to have ...
1
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1answer
76 views

Ubuntu on VPS becomes unresponsive: BUG: soft lockup - CPU#0 stuck for 22s

We have a VPS running Ubuntu, on Xen. The problem is this, about once a day, for about 20-50 minutes, at a random time, the server becomes completely unresponsive to the outside world. After this ...
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10 views

XEN - Start VM after changing the toolstack

I've changed the toolstack from xend to xapi. Using the xend toolstack I could start a vm like xm create myconfigfiele.cfg. How can I start the same VM using xapi?
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1answer
46 views

Install xenserver on iscsi target

Is is know that Xen Server is based on CentOS, and it is fact that CentOS can be installed on an ISCSI target flawlessly, but I wanted to install Xen server on an ISCSI target I couldn't find a way. ...
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2answers
56 views

Boot xen server through ipxe

I'm want install Xen Server 6.2 though ipxe, I tried different configurations, no luck making to work until now. I found some may example to boot from pxe using TFTP server, and here is an example: ...
3
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1answer
44 views

Xen open source import and export vm

I am using free Xen 4.2.4-30.el6 on centos 6.5 create a vm using virt-install I want to backup and restore virtual machines, but all tutorials talking about citrix and xe command is there any way ...
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34 views

Xen blktap qcow/qcow2 not connecting

I have a similar issue as posted here, but with qcow/qcow2 images: Xen 4.1 host (dom0) with blktap disks ("tap:aio:") not connecting I tried Xen 4.1 on Ubuntu 12.04.04 precise, with both ...
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1answer
86 views

Upgrading openssh-server on XenServer 6.2

I have XenServer 6.2 which only has version: OpenSSH_4.3p2, OpenSSL 0.9.8e-fips-rhel5 01 Jul 2008 I tried to upgrade it using: yum -y reinstall opnssh-server or yum -y install opnssh-server ...
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1answer
173 views

Can I use XenServer GPU Pass-Through without XenDesktop?

XenServer documentation only covers using GPU Pass-Through ("vGPU") to run XenDesktop's "HDX 3D Pro Graphics." XenServer GPU Pass-Through cannot be used with the XenCenter VNC console and it does not ...
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1answer
330 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
100 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
50 views

How does creating multiple virtual machines affect performance of a Dell Server? [closed]

Say, a dozen applications have to hosted on a single Dell Server using open source technologies like XenServer. Some of the applications are resource intensive while others are not. What should be ...
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2answers
334 views

xen creating a new virtual machine with bridge networking

I am using CentOS 6.5 64 use this tutorial to setup Bridge [root@CentOS ~]# brctl show bridge name bridge id STP enabled interfaces xenbr0 8000.08002754b3fa yes ...
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1answer
151 views

Hotplug scripts not working xen [closed]

I am using CentOS 6.5 64 using this script to install xen on server yum install http://fedora.cu.be/epel/6/x86_64/epel-release-6-8.noarch.rpm yum install centos-release-xen yum install xen ...
2
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1answer
153 views

Xen SATA PCI Passthrough to Ubutnu DomU not recognising disks

I have a Xen 4.1 server with a Debian Wheezy 7.4 Dom0 (hmpyxen01). It has a SATA PCI card that I am passing through to an Ubuntu Precise 12.04 DomU (hmvmtmp01), installed via xen-tools which in this ...
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36 views

xen server edition - need more cores for win7 VMs

I setup a win7 VM in my Xen 6.2 system with 8 cores. When the VM boots it only shows 2 cores (and the performance seems to go along with this). Looking at the docs for Xen it seems that this ...
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1answer
96 views

Configure GRUB on XEN VPS

I have a xen VPS with debian 7 x86_64 installed on it. The operating system comes with GRUB2 installed on it. The problem is that while runnnig apt-get update apt-get upgrade -y GRUB says The GRUB ...
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21 views

xen vdi read-only change from true to false

I have the xen vm which have 2 virtual disk, i found that only one disk is attach to the vm. one is readonly=true ( which is no attached ) one is readonly=false ( which is attached ) but i was ...
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69 views

reclaim space from xen server

i found xencenter stotage => general tah display 1096.6 GB used of 1107.7 GB total (708.5 GB allocated) seen some space have been eaten and not release. the SMLog show that [13816] 2014-03-28 ...
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1answer
24 views

Very high load during pvmove in domU

I had a pretty bad time this evening. I had to move LVM2 LVs from one PV to another (source PV backed by NFS stored vdisk, target PV backed by an iscsi LUN). Moving small LVs of ths VG (few gigabits) ...
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1answer
56 views

Intel VT enable but not found in xenserver

I have an IBM 206M with this CPU --> Intel Presler Pentium D 950 Socket LGA 775 P4D 3.4 Ghz 800Mhz FSB 4M Cache EM64T. It has Intel Virtualisation tecnology. But when i want to install xen server, the ...
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32 views

How does Xen resize VMs without shutting them down?

I'm experimenting with Xen on a spare machine and I noticed that it can resize the RAM and CPU allocations of my VMs without shutting them down first. VirtualBox, VMware Fusion, etc. can't do the same ...
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13 views

How can I see which Xen guests are using which cpu pools?

xm cpupool-list will show how many domains are on each cpupool xm cpupool-migrate will move a domain to a different pool But I can't find a command to show which cpupool a domain is using, or which ...
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47 views

Configuring kdump on CentOS 5.9 dom0. Cannot get makedumpfile to run in crash kernel

The setup: CentOS 5.9 dom0 running under Xen4.1.4. Crash kernel loaded (512M, because otherwise it would take forever to run init after the failures), and kdump functional. I am able to force the ...
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2answers
287 views

How can I configure access to pfSense on Xen

I have a new Xen installation on which I want to run virtual machines. My hoster provided me two separate IPs in different subnets, say x.x.x.x and y.y.y.y. I want to set up pfSense on Xen and ...
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45 views

Xen (SolusVM): Guest Windows partition is not auto-allocating free space

We are creating guest VM on Windows Server 2008 from the template we've built before but when we are giving our guest VM more disk space from the beginning it's not auto allocating that space. So when ...
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47 views

Virtual Allocation Unreasonably High

Just upgraded our pool to Xenserver 6.2 and installed a brand new host, also with Xenserver 6.2. Was excited about the new features since Xenserver was fully open-sources (over-allocate ram, ha live ...
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45 views

Automate Live Xen migration of VMs to achieve dynamic load balancing in Open source environment

DRS in Vsphere is paid. Is there exist any alternative to achieve dynamic load balancing through automating live xen vm migration in open source environment ?? Also,if required, how can write our own ...
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57 views

Disabling VNC for HVM on Xen causes error

When I try to start a Xen HVM guest without VNC, I always get this error libxl: error: libxl_dm.c:1212:device_model_spawn_outcome: domain 25 device model: spawn failed (rc=-3) libxl: error: ...
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43 views

Xen multiple simultaneous live migrations

I have some VMs on a physical server and I need to migrate them on another physical server. Both server are running Xen hypervisor. I attempted to migrate them simultaneously by executing the commands ...
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43 views

Error when enabling HA on Xen Server

We have 4 Xen servers - 6.2 build 70446c - one shared storage - accessible via NFS. We disabled HA in order to solve some issues with a live migration that was stuck. I put the master on that pool in ...
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1answer
42 views

Xen doesn't boot after install [closed]

I tried to setup Xen by the instruction released on the site of my hoster. I installed Xen, completed RAID setup as it is told in the instruction. Rebooted and succesfully connected to Xen from ...
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52 views

Unison and Resolving Conflicts with diff3

I installed Unison because I wanted a two-way synchronization to my DRBD directory, my logic is a little bit complicated so I am stressing on the problem itself and ignoring unneeded information, ...
2
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2answers
104 views

DRBD Madness on Virtual Environment (XEN)

Right now I am using DRBD to replicate two directories (/var/www and /var/spool/mail) on two different XEN VPS's and they're 7000 Miles away from each other! on the top of that I am using a ...
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2answers
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DRBD Dual-Primary Obstacles

I have DRBD installed and configured on two different servers, everything is working as expected but I am having a horrible I/O disk read/write speed and network latency like crazy, my shared ...