XenServer is the virtualization platform Citrix has built around the Xen Hypervisor.

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Xenserver 6.2 cannot send alert using gmail smtp

I'm using Xenserver 6.2 and configured ssmtp.conf an mail_alert.conf in order to receive alerts through email. I followed the instructions on ...
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111 views

xenserver vm routing fails half the time on the same network

I recently switched from openstack (due to complexity) to xenserver at work, I ran into an issue that I can't solve, I can ping the server all the time but the vms part of the time. here is a ...
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289 views

Restore LVM if VG is not consistent (XenServer 5.6.1)

i have a VG that uses the PVs /dev/md1 and /dev/md2. Now one hdd failed in /dev/md1: [root@xenserver1 ~]# cat /proc/mdstat Personalities : [raid1] md1 : active raid1 sda3[0] 382320128 blocks ...
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425 views

How to increase CPU core speed of a guest to maximum of Citrix Xenserver Host

There is a Citrix XenServer 5.5 (HP ML370 G5, Xeon 2GHz) on this Server there is a Windows Guest (Windows 2008 R2 x64) under Properties I set 4 CPU Cores with max prio. But if I check with CPU-Z the ...
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434 views

Almost All Xenserver Logical Volumes Disappeared - Recovery?

We had a hard disc crash of one of two hard discs in a software raid with a LVM on top. The server is running Citrix xenserver. On the hard disk which is still intact, the volume group gets detected ...
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804 views

Citrix XenApp Fundamentals

I have a problem with a new install of a XenApp Citrix server. Everything was working fine, but I was setting up Citrix Access Gateway and single sign in. Now, on the main server I am getting an ...
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3k views

XenServer 5.5 local storage problem

I have the following problem with a Citrix XenServer 5.5. I had to physically move the host, so I shut down all machines via console: xe vm-shutdown force=true vm=my-machine-uuis-s After that I ...
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84 views

How to incrementally backup XenServer VMs

I am looking for a way to backup XenServer (or XAPI) VMs incrementally. backup just changed data every time. without performance penalty, slowing down the server after the backup is done (snapshots ...
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91 views

Apache cloudstack: Cannot add instances using template created from snapshot

I followed this https://github.com/imduffy15/GSoC-2014/ and installed apache cloudstack with basic networking in my local machine, and every thing worked smoothly. ​I can add instances from the built ...
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44 views

XenServer pool, unable to access certain networks from 2 servers in pool

I have Xenserver pool of of 3 xenservers, at version 6.1. After we got a serious DDOS attack on our network, all servers got rebooted (whole pool of 3 servers got restart and entered into maintenance ...
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175 views

Diskless XenServer 6.2

I'm a bit suspicious since I cannot find relevant recent information on this. I am wanting to boot a diskless XenServer version 6.2 (the server... not the installer). I have an Intel Pro 1000 ET ...
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512 views

XenServer IP Failover OVH not working

I have got problem on XenServer with IP FailOver in OVH. I did everything what is in this official tutorial http://help.ovh.co.uk/BridgeClient and IP not working. On my VM is Debian 7 64bit I set MAC ...
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570 views

ext4 root filesystem corruption under XenServer 6.2 DomU

We're with a problem with filesystem corruption in guest machines in a XenServer 6.2 It only happens in Linux Machines. Randomly the filesystem remounts as read-only and them corruption starts on the ...
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114 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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97 views

Attach Multiple disk LVM from old Xenserver to new Xenserver

hope you can help me with this one... We have a Xenserver 6 with 4 320 Gig disks as a one LVM Volume Group. Suddenly past friday one disk failed and we were unable to start the server. I have tried to ...
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77 views

How can I export a XenServer virtual machine with all its snapshots?

Is there a way to export a virtual machine running on XenServer with all its past snapshots? I have tried to export a VM through XenCenter (right click on the machine and "Export..."). After importing ...
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210 views

FreeBSD XEN kernel not booting in XenServer 6.2

I have a XenServer 6.2 host, and I am trying to get a FreeBSD-9.1-i386 guest to run in PV mode. The installation of the guest is fine, but after a reboot with the new kernel the system does not boot. ...
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274 views

How to add missing kernel modules into xenserver using DDK?

Not sure if this is the best place to ask this question, stackoverflow doesn't seem quite right... anyway, maybe someone has done this before here. I would like to add some missing kernel modules ...
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156 views

What RAID policies should be used for a XenServer host?

I have a server with a PERC6/i card and a RAID-10 array running XenServer 6.1 with 6x VMs, one of which is SBS 2008 and the rest are a mix of file server, video-on-demand and SQL database server. The ...
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528 views

How to import XenServer's ovf/ova/xva format to KVM?

Now I'm considering migrate from Xen to KVM. I exported some exist virtual machines from Xen in the formats ovf and xva. How could I import them into KVM? As there're only a few of virtual machines, ...
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198 views

Cannot upgrade xenserver,pool master changes automatically to other server

I need to upgrade my XenServer pool of servers from 5.6 to 6.1. The problem i am facing is that when i shutdown pol master to boot it from CD, then it other member in the pool become the pool master ...
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1k views

Import Xen Server VHD

I am trialing using a distributed file system as the backend storage for my Xen Servers. I have set up the DFS (distributed file system) (using CentOS and GlusterFS) and everything is working ...
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2k views

Windows Server 2008 R2 DC can't ping to other computers except other DC

I have been trying to troubleshoot this problem since 20 hours ago, and still can't find a solution. I brought down (orderly shutdown) a Domain Controller yesterday. No problem at all connecting to ...
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476 views

Access All VLANS over XenServer Interface

For my current setup, I have a physical NIC on a XenServer machine that receives traffic tagged with various VLAN IDs. I have a virtual machine that is running Vyatta that needs to be able to access ...
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487 views

Change xenbr0 bridge name in XenServer

I want to setup a bridge in XenServer with a name other than xenbr0 , for example cloud0. I edited those files and their contenent so they can handle a bridged connection: ...
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236 views

I cannot see any VMs after I restart the xenhost

We have two xen host server in xen server pool. Host1 is the master and host2 is the slave. We restarted the xenhost1 due to server load. After the restart we could not view any VMs or the slave node ...
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1k views

XenServer 6.0 upgrade pygrub error

Just upgraded our XenServer testmachine from 5.6 to 6.0, one of the vms' (ubuntu-server 10.04 LTS) will no longer boot. Error in XenCenter; 9/11/2011 3:48:23 PM Error: Starting VM 'TestDom-Ubuntu' - ...
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32 views

Can reaching shared storage capacity prevent a VM from starting up in XenServer?

I have a VM installed on XenServer; it's drive is on an NFS share, which has just reached capaciy--could this prevent the VM from starting up?
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1k views

how to force stop/delete a VirtualMachine under XenServer (possible bug)

I was testing XenServer 5.6 100-47101p, I installed four VM's, two FreeBSD and two Windows. After installing the four VM's, I recompiled the VM containing FreeBSD 8.2 i386 kernel to enable/support ...
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11 views

How does Xen Server share iSCSI?

When I create a resource pool of multiple XenServer hosts, add an iSCSI storage repository, how do the separate hosts orchestrate access to the iSCSI storage repository? To be clear, consider if I ...
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9 views

Moving VMs and storage used space

I need to move around 1 TB of VMs from a slow SR to a SSD brand new SR. Xenserver pools and hosts are updated to the lastets patches (from 6.2 SP) Using a 1 GB switch and NICs it was quite fast to ...
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48 views

External USB drive on xen windows guest

I have an external USB 2Tb drive I'm trying to use with a xen guest. Xen Center 6.1 sees the drive in the removable storage repository and I can assign it to a guest. But the guest (tested ...
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51 views

How can I perform mass provisioning of Debian Guest VMs on XenServer?

There are a number of tools for provisioning physical and virtual servers, but I can't see a well documented solution for provisioning XenServer Debian guests, apart from using XenCenter itself. With ...
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31 views

Automatically configure networking on new VM in XenServer

We have a base RHEL 6.5 64-bit template that we use to create new VMs in XenServer. Every time we make one, we have to configure: /etc/hosts /etc/sysconfig/network ...
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37 views

XenServer CLI console

The XenServer CLI provides direct console access to a VM using the xe console command. (See this question: How to get a CLI for a virtual machine on XenServer?) However, on a Linux box running ...
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104 views

XenServer Corrupts Virtual Machines

After (we believe) a backup application passed large amounts of traffic across a low quality SAN that some of our VMs were running off of, all VMs became read only, after this we powercycled the host, ...
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135 views

Xencenter import error “System.ArgumentNullException: Value cannot be null. Parameter name: path1”

I am using Xencenter 6.2 to import an ESXi 5 OVF file to a Xenserver 6.2 host. When I select the OVF file from to import, Xencenter throws an error saying "There has been an unsuspecting error, please ...
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103 views

Opening a port range using Open VSwitch

I am locking down a VM on xenserver to allow only port 3389 and the ports required for domain controller authentication on windows. I am trying to do this using Open VSwitch. Locking down and allowing ...
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333 views

XenServer 6.2 Read Only and Slow Disk I/O

I virtualized a datacenter a few months back and we have a pool of 3 HP DL360 G5 servers, each with 32GB of Memory and dual Intel Xeons. Recently we have been experiencing 2 issues, the first of which ...
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36 views

Replacing the main xenserver disk but retaining the vm storage

we have a simple xenserver host with a 2TB disk and a bunch of vm guests on it. I would like to add a new small 60Gb SSD drive and reinstall xenserver on it, but I don't want to lose any of the VM ...
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82 views

XenServer IOPS read

I'm trying to retrieve some performance statistics from several Citrix XenServer installations (with versions from 5.5 to 6.2). What I need exactly are IOPS (read and write). Trying to use iostat on ...
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122 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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82 views

Error in XenServer iSCSI SR Creation (SR is not available)

I have a XenServer 6.2 with a Debian 7.5 VM which i use as iSCSI target. I have my target reachable by portal but i would make a Storage Repository available in my XenServer pool. Unfortunately, ...
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37 views

Automatic switching of network card when vm is moved

I have two hosts in a pool and I used to be able to move the vm around and they will start without any problem. But after I played around with some network setting, which I don't remember what, I ...
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124 views

Changing XenServer from LVM SR to EXT SR

I'm trying to setup openstack using this page: https://wiki.openstack.org/wiki/XenServer/PostInstall Unfortunately I think when I setup xenserver it setup the local SR as LVM (which the page above ...
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27 views

Boot to last VM status on XenServer reboot

I have a Citrix XenServer 6.2 on a non-prod enviroment, which means that could be affected by power outages from time to time. This server has a lot of VMs, some of them are power on and other not. ...
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84 views

xenserver backup producing snapshot too long

I am having the same problem as outlined in this question: xenserver snapshot chain too long I don't have enough rep to comment on the post so I am creating my own question. I have attempted to use ...
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1k views

Cannot mount external FreeNAS NFS on XenServer VM or Dom0

I'm hoping someone can help identify a problem or at least send me in the right direction. I've created an NFS share on FreeNAS. The server has an external IP. I can mount this on my Debian machine ...
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65 views

Xenserver firewall consideration

We are setting up Xenserver for a production environment with seperate VMs for a website, billing, control panel, mail. My question is, should we rely on each server's IPtables or is it necessary to ...
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204 views

Xenserver 6.2 - read-only filesystem after crash

I'm totally new on XenServer. I've installed 6.2 community edition few days ago. Everything was working fine (4 VMs - 3 Win XP and 1 Ubuntu 12.04). When I was trying to install Zentyal as VM my system ...