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

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xen Dom0 network setup on ubuntu 12.04.1 LTS

I read a lot of tutorials (or at least try to be) but none is able to explain well how to configure networks for xen host. my Dom0 has two interfaces eth0 (real interfaces) and virbr0 (I guess was ...
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Moving large Xen Virtual Machine

I have a cluster of 4 Xenserver 6.2 servers, as well as one independent XenServer for a customer which have are attached to a very questionable (meaning that the drive hot-swapping causes it to break) ...
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2k views

XenCenter cannot connect to XenServer

I am trying to establish a connection using XenCenter 6.0 to a server where XenServer 6.0 is installed, but it gives me the following error message: Unable to connect to server '192.xxx.xxx.xxx'. ...
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IP setting in CentoOS 6.2x64 by XenCenter 6.2

I have setup a Guest CentOS virtual machine in Xenserver.. I have updated the Xentools but i cannot find the option to config my IP Address which is showing to be 'unknown' currently. All i need to do ...
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Determine which guest is running on XEN: HVM or PV guest

I'm working with a Xen host which is installed XenServer from Citrix by someone. He already installed a lot of CentOS 5.2 guests on the host. I wonder how to check those guests to know they are PV ...
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47 views

XenServer 6.5 bare metal randomly rebooting and hanging

I am pretty new to XenServer so it may just be something silly causing this. Some background first. I have 2 instances of XenServer running on my network. I have an older horsepower server ...
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XenServer 6.0.2 and Cisco 3550 vlan configuration

I am running a couple of xenserver 6.0.2 hosts with multiple vm's on them. All the xen hosts have 4 physical network ports connecting to the cisco. Each port is untagged in xen but is tagged to a vlan ...
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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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Optimising bare-metal hypervisor installation

what is the best way to install a bare metal hypervisor (i.e. to host multiple VM's)? I spoke to a friend and he is using a HP server to host all his VMs with VMware ESXi, but he installed the VMWARE ...
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xenserver snapshot chain too long

I've been running a XenServer 6.2 server for a month or so and recently one of my VMs will not perform snapshots. I receive the error "The snapshot chain is too long" although I have removed all of ...
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XenServer CentOS VM: EXT4-fs error (device dm-2): ext4_journal_start_sb: Detected aborted journal

I have 2 different CentOS 6.4 VM's on 2 different Citrix XenServer and both have the same error within couple of few days. Output of messages: kernel: Aborting journal on device dm-2-8. kernel: ...
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49 views

XenServer - Storage XenMotion between 2 servers using direct LAN connection

I have two physical servers (recent, Haswell based machines) on which I have installed XenServer 6.5 . Both servers have two NICs. These servers are hosted at the Hetzner datacenter. I have connected ...
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XenServer 6.5.0 tapdisk experienced an error

I have just deployed XenServer 6.5.0 on a physical box. I connect to it with XenCenter client. I am able to create a VM, but when i start it, I get the following error: "tapdisk experienced an error". ...
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1answer
717 views

How can I install a new xenserver dom0 kernel?

Since Citrix released the full source code to xenserver 6.2 I've been evaluating it. It's works very well, but there is only one problem that I haven't solved. Unfortunately, Citrix do not supply the ...
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XenServer 6.2 VM 100% CPU and 100% memory usage and won't boot

I had this problem today after a power failure. I had 2 vms and one of them won't boot and was using 100% of CPU and 100% of memory. Since it was very dificult to solve (at least for me) I want to ...
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Xenserver 5.6 SR_BACKEND_FAILURE_47 no such volume group, but it is there

I've looked everywhere (Google, here, a bunch of other sites), and while I have found people with similar problems, I couldn't find a single one with a solution to this. Last night our xenserver 5.6 ...
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Remote automated provisioning to a XenServer Hypervisor

I'm currently working on a project where I use Vagrant with Ansible provisioning to create local environments in VirtualBox. I'm currently working with a University and we have a XenServer Hypervisor ...
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XenServer 6.5 - Creating local iso storage/library failed - SR_BACKEND_FAILURE_222

I was trying to adapt instructions for XenServer 6.2 on how to create a local ISO library to a freshly installed XenServer 6.5 host. However the command ... xe sr-create name-label=LocalIso type=iso ...
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Xenserver boot error

I'm trying to get Xenserver 5.5 running on a spare computer here, hardware specs: Intel Q6600, 4GB Ram, and Gigabyte GA-P35-DS3R motherboard Xenserver itself installs fine onto a 150GB sata hdd, ...
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31 views

Can not ping from Ubuntu VM but can to

I've got an XenServer with an pfsense Router Running on it. There are the following Networks: Lan: 10.0.0.0/24 DMZ: 10.0.1.0/24 Secure: 10.0.2.0/24 WAN: xxx I got 2 Windows VMs inside LAN: ...
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Xenserver 6.5 LSI MegaRAID

Is there a package available to install the MegaCLI on XenServer6.5? For 6.5 there is this [1] but 6.5 has another kernel. XenServer 6.5 is based on CentOS6.5 (right?), so I also tried the ...
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How to use more than 3 virtual disks in Linux using CentOS and XenServer

I've attached 5 virtual disks to a Virtual Machine in Citrix XenServer. The VM has the xs-tools installed. Initially it said that it couldn't add so many disks. After I installed the xs-tools, it ...
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152 views

citrix xenserver 6.5 can't get vm's public network

Can't get my vm's guest out connection..! Premised: I alreay use xenserver on a test server dellt310 with two ethernet card that works perfectly, but now... -> I have an hetzner dedicated server ...
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714 views

XenServer 6.2 - Hetzner host - Additional Subnet Configuration

I have a dedicated server on Hetzner, on which I have installed XenServer 6.2 . The server comes with one public IP address. I purchased an additional subnet containing 6 usable IP addresses, for use ...
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62 views

Server 2012 R2 System Disk Filling

This is a bit of a strange issue - the usual troubleshooting steps don't seem to apply. On a XenServer 6.2 host (with SP1), I have a guest VM that is running Windows Server 2012 R2 that functions as ...
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540 views

XenServer VM SSH

I am trying to create a Ubuntu VM in XenServer and log into it with SSH. I was already able to do this using the same image, but now I just cannot figure out how I got the IP of the newly created ...
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693 views

XenServer Guest PV - Serial Port RS232

Is there any way how to forward (passthrough) physical serial port to XenGuest PV system? I need to be able configure serial device with virtual server on XenServer 6.2. I’m looking for some like ...
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61 views

XenServer 6.2 DHCP Setup

I have a XenServer 6.2 running on a dedicated OVH Server. For this dedicated server I have 2 additional IP blocks. Whenever I setup a new VM (mostly CentOS 6.6) i have to skip the network ...
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2answers
115 views

RAID 10 Stripe Size for XenServer

Below is our current server configuration. In a few weeks I will be simulating a disaster recovery by installing 5 new disks (1 hot spare) and restoring all VMs from the backups. Will I gain anything ...
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35 views

XenCenter shows two disks per VM

I have two servers with Citrix XenServer 6.2 installed, including all patches up to XS62ESP1019. The servers are not part of a pool, the VMs do not have snapshots. When migrating a VM from one server ...
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XenServer and ZFS via NFS

I'm trying to connect a NFS share to XenCenter. The NFS server is a ZFSGuru distro (uses FreeBSD). The zfs volume was exported like this: /sbin/zfs set sharenfs="on" temppool/share According to ...
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39 views

Attaching a hard drive with ESXi VMs to XenServer

I am testing XenServer 6.5 on a single host, and as a test I have exported and imported a few VMs in OVF format from my existing ESXi server. All good so far, but I was wondering: I have a hard drive ...
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X3250 Server: stuck at firmware screen

The server is initialize, then it is stuck at the IBM System X Server Firmware screen (before F1, F12 appears, etc). You can see in the attached image. ...
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34 views

Random XEN guests do not boot complaining disk not found

Performed the latest Citrix XEN Server 6.2 updates, skipping anything related to 6.5. Everything seemed normal after fixing GrubConf.py except that a few random Windows Servers would not start. ...
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Xen 6.2 to 6.5 - rebuild servers?

It appears the XenServer 6.5 has been released and it's quite a bit faster than 6.2 in many ways. When I installed 6.2 I accepted the various defaults and end up with a system that is awkwardly ...
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34 views

Enable IOMMU for Xenserver

I have installed Xenserver 6.2 in my machine with ASUS A58M-E motherboard and AMD A8-6600K APU (CPU). Now even if the IOMMU is enabled in the BIOS, Xenserver is reporting that IOMMU is not enabled and ...
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XenServer: run management and data over same LACP bond

I have a XenServer (open source version 6.5) machine with 6 available ethernet interfaces. Is there a way to create one single LACP bond with all interfaces and then run the management network as ...
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How to power down Cloudstack configured with XenServer Hypervisors

I have three XenServers(6.2) configured in a single pool. I also have a Cloudstack (CentOS 6.5) Management interface controlling them all. Everything is up and running but I can not figure out how to ...
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58 views

OpenVPN issues on VM with XenServer 6.2

Clients connecting via OpenVPN on VM server A, cannot connect to VM's on server B within XenServer 6.2 on same pool using SSH I have a pool of two servers using XenServer 6.2, server A and server B ...
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1answer
212 views

Can't Repair SR in XenCenter

I've added in a 4th host to my Xen 6.2 cluster and I'm unable to get it to successfully attach to my existing storage repositories. I'm using 3 older IBM hosts and the 4th new one which is CPU masked ...
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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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3answers
1k views

XenServer HA (failover VM's) without shared storage

In the university from Uruguay where I work, we have 2 IBM BladeCenter S with 4 server blades each one. Each blade have XenServer 6.2 installed and working. Our idea is have each BladeCenter in ...
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1answer
1k views

Kernel parameters mem and dom0_mem in XenServer 6.1

We are running XenServer 6.1 in production, and recently had OOM-killer fire and eventually take down one of our blades. I noticed that in the kernel logs from the oom-killer instance that it seemed ...
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Recover Xenserver VM's in Linux Rescue mode WITHOUT Xenserver host

My physical server got hacked so my provider has shut down the server and booted it in Linux rescue mode. I've got full access to the file systems in Linux, however after hours of trying and searching ...
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120 views

XenServer 6.2: reattach SR but all disks have no description

I have recently reinstalled XenServer on my server. All the VHD files were stored on my NAS via NFS, so I re-added the NFS SR after reinstallation. However, all my VMs seem to be missing, and the ...
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853 views

XenServer 6.5 Software Raid

I try to install XenServer 6.5 with Software-RAID 1 at my home lab. With XenServer 6.2 this setup ran stable for a few months (at the same hardware). XenServer 6.5 installation went smoothly and ...
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347 views

XenServer 6.5 iSCSI MPIO with point-to-point links (without a Switch)

I'm doing some experiment with iSCSI MPIO between FreeNAS 9.3 and two XenServer 6.5 hosts. I would like to use iSCSI MPIO to serve as VM storage. Pretty common environment, but without a switch to ...
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25 views

More than 3 virtual disks in XenServer

I have an Ubuntu Server 14.04LTS on a XenServer 6.2 in HVM mode. Is there any way to use more than 3 virtual disks without a full PV? I already installed XenTools but nothing changes. As far as I ...
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2answers
3k views

How can I create a new VM pointing to something other than a CD/DVD

I am new to XenServer and want to experiment with adding new virtual machines. I am running XenServer 6.1 and XenCenter. I have successfully created a new VM by burning a DVD and during the creation ...
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Xen 6.2 - how to free up space?

I have an HA pool of 3 Xen 6.2 machines. On each the root volume is > 90% full. I've updated the logrotate scripts to keep /var/log clean but have found that lots of space is taken up by /var/patch. ...