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

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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 ...
6
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1answer
4k views

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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2answers
2k views

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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3answers
1k views

Change screen resolution of Xenserver Console for a CentOS VM

I need to increase screen resolution to 1024x800 for all my XEN console. I tried to place "vga=791" at the end of kernel line the file /boot/grub/grub.conf but it seems that most of the boots ...
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1answer
20 views

Will a Xen Server v5.5 Snaphot run on Xen Server v7.0

I have a Citrix Xen Server version 5.5 running with a few VM's. I want to upgrade the hardware (new hard disks) and also upgrade the OS to the new Citrix Xen Server v7.0. Can I just make a snaphot of ...
2
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1answer
1k 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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10 views

Fujtisu Eternus DX80 change iSCSI Discovery Reply Mode

I have a configuration mistake in my dx80 and the system is already in production. I have to set "iSCSI Discovery Reply Mode" at "Host Response" configuration to "All - Reply All Ports (Default)". Is ...
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1answer
4k 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
942 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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1answer
1k views

XenServer - VMs to access Internet, but should not be visible from the Internet

I have installed XenServer on my server at the Hetzner datacenter. I have bought an additional /29 subnet containing 6 usable IP addresses from them. I want to install more than 10 VMs on this server....
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2answers
7k views

Citrix Xen VM's lose networking

My client has a XenServer 6.0.2 installation with 2 Window Server 2008 R2 virtual machines. Whenever the virtual machines are rebooted they lose their IP settings (IP address, subnet, gateway). Each ...
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58 views

XenServer 6.2 - could not find filesystem '/dev/root'

We have a Citrix Xenserver 6.2 install. Today we had an incident where power to the server was suddenly cut off from the server. It had been running for quite some time without issue. It has quite a ...
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0answers
15 views

No network on XenServer VMs

I'm trying to set up a CloudStack private cloud with advanced networking and I seem to have navigated most of the hard part. The problem now is my system VMs are not able to access the public gateway ...
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2answers
2k views

Shrink a Windows VM in XenServer

I faced a problem. I deployed a VM by size of 500GB on Citrix XenServer and now I want to shrink it, because I don't have enough space for snapshots. Now I want to perform an export/import to do this. ...
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31 views

What's the impact of a high cpu steal time on XenServer's dom0?

From what I understand, cpu steal time is the CPU time that the VM kernel requested, but was denied by the hypervisor because it was serving another VM. From my experience, on a XenServer that has ...
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1answer
69 views

Running Apache2 in xenserver

I am trying to run my own squirrelmail email server. This involves the use of apache2, postfix, and squirrelmail. When I first boot up the server everything will work fine, but after about 1 - 2 ...
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1answer
31 views

How to set up XenServer with OpenBSD?

I've worked with VirtualBox before, but am new to XenServer. I have XenServer 6.5 set up on a computer on my LAN. This computer has one NIC, with IP 192.168.1.1 . Do I need more than one NIC? I can ...
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1answer
1k views

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 http://support.citrix.com/servlet/KbServlet/download/34969-...
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27 views

Virsh cannot connect to Xen server

I have installed the latest version of Xen server 6.5. Now I want to connect to it with virsh (libvirt-bin). When I do this I get the error error:end of file while reading data: sh:nc:command not ...
3
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1answer
73 views

What are the implications of running an older version of xenserver tools on VMs?

As part of my day-job I manage a couple of xenserver pools. I've been working through the old ones, bringing them up to xenserver 6.5 from a range of older versions 5.5, 6.0, 6.1, and 6.2 Many of ...
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1answer
40 views

Xen Server interference on ARP requests

I have a strange behaviour on my network as my unix-like hosts seem to have problems to reach the gateway. Digging into the network traffic via tcpdump, I've seen that two different hosts answer to ...
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24 views

XenServer 6.5 access “old” xen storage

After a power outage XenServer 6.5 won't boot any more. So i booted the system from a "LiveXen" USB stick. How can i now access my old XenStorage at /dev/sbc to copy all VM images to a safe place to ...
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0answers
40 views

Xenserver 6.2: error “There is not enough space to upload the update”

Xenserver upload update/patch, there is not enough space to upload the update. After uploading many patches, Xen gave me this error "there is not enough space to upload the update" and when I check on ...
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23 views

Converting VMs from XenServer to OpenStack (KVM)

I'm looking at moving our XenServer cluster (150 VMs) to OpenStack on KVM. After extensive reading it looks like virt-v2v will do this. However I'm confused about it's usage. I was going to copy ...
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348 views

How to Reclaim Space from XenServer?

I found that the XenCenter storage tab claims there is 1096.6 GB used of 1107.7 GB total (708.5 GB allocated). It appears that some space has been eaten and not released. The SMLog shows: [13816] ...
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1answer
7k views

Vm error during start up “hvm is required for this operation”

I have installed a new XEN server 6.0. I have created a new vm machine and select windows xp sp3 template. When i try to start this new vm an error appears with the following message "hvm is required ...
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1answer
51 views

Can I convert a Fast Clone to a full copy?

I am using XenCenter to access a XenServer with several VMs which I use for dev DBs. Periodically I create new VMs with a fresh batch of sanitized live data, then swap them out with the old VMs. ...
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189 views

/dev/centos/root does not exist after migrating CentOS7 from vmware to Xen

I am migrating a CentOS 7 system from VMware Server 2 to XenServer 6.5. The CentOS system was installed using the minimal installation. I used ovftool to convert the .vmdk file to a .img using the ...
3
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2answers
5k views

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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2answers
787 views

handle fork bomb on a virtualized environment XenServer / “FreeBSD jails”

I am used to work with FreeBSD jails but I wanted to give a try to XenServer 5.5 / Vmware ESXI 5, hoping it can really limit resources per VM, after installing a couple of Virtual Machines, I tried to ...
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2answers
2k views

Upgrading XenServer 6.2 to 6.5 or updating in general

Trying to get my XenServer to update, and want to upgrade it also to version 6.5. But cant figur out how. When i try to update using the XenCenter, i cant select the server itselfe when i get to that ...
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13 views

Auto Power On Xenserver 6.5

After applying updates to my xenservers I noticed VM's that were turned off turned themselves on after the server I applied updates to rebooted. I do not have any vApps configured and I did not ...
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0answers
26 views

XenServer 6.5 Zeroed Performance Metrics for IOPS

In one of my XenServer 6.5 pools, I'm adding some graphs in XenCenter to measure my iSCSI storage IOPS and throughput performance and I'm getting no response. The graph is actually responsive, but ...
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0answers
24 views

XenServer Fails to Backup:

I've had this issue on and off for a year and I figured I should finally post something. When going Server -> Backup on a three host pool of XenServer 6.5 SP1, I get "Unable to read data from the ...
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29 views

Does anyone have experience with XenServer 6.5 with software raid 1?

I have successfully installed software raid on Xen Server 6.5 and I'm about to move a VM from ESXi to Xen due to benefits of raid 1 for a development server. Does anyone have any kind of experience ...
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1answer
32 views

How can I retrieve XenServer Alerts from SDK/API or CLI

Is there any way to retrieve alerts infomations from xenserver, such as API or CLI. Alerts in XenCenter
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25 views

XenServer 6.5 - VM from snapshot and SID

I have been reading up on the myths behind the need to change an SID for a cloned system and how a system never exposes his SID outside his own self (so there's no need for it). Previously i used to ...
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2answers
1k views

How to change disk controller of a VM running on XenServer 6.2?

I'm running a installation of XenServer 6.2 where I've imported a .ova. The .ova is an image of a linux-system from a previous vmware esxi environment. The problem is that since the linux-image doesn'...
2
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1answer
2k views

Creating a Xenserver 6.2 pool

I would appreciate a bit of guidance with the following task. I have a standalone Xenserver 6.2 that is running 2 Windows 2012 VMs. This server is connected via NFS to a NAS server. I recently ...
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3answers
237 views

Installing XenServer 6.5 but does not boot up

I have a server with two CPUs, 64GB of RAM and a 8TB RAID 1 drive. I have successfully installed XenServer many times. But when it tries to boot for the first time, it does not boot to the new install....
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0answers
70 views

How to recover XenServer vm's from a mdadm raid 1 HDD

I have an older server, namely, Fujitsu Siemens Primergy TX 150 S6 on witch i have installed XenServer 6.5.0-90233c. On it i have multiple virtual machines of different sizes of witch i need to ...
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0answers
66 views

Xenserver 6.5: Disc Reclaim does not calculate correct freed space after deleting Snapshot.

I am working to virtualise some servers on my location. After installing one server successfully, generated some snapshots during the preparing process. Then deleted them but Reclaiming freed space ...
0
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1answer
163 views

Mounting virtual disks on XenServer

I want to mount virtual disks on the XenServer host. I don't have any free space to create a partition this way and want to use a virtual disk on local storage to store ISO images. I can't find any ...
3
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1answer
1k views

How to set get XenCenter to detect virtual cdrom drives?

I am attempting to help a client but I am a bit out of my depth, they have a XS6 dedicated server, and I have created a series of virtual drives for various distros, using isos we have. For example /...
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3answers
493 views

Converting Linux machine from XenServer to Hyper-V

I'm in the process of converting the last few on my XenServer VMs over to Hyper-V. The majority of them have been Windows machines and I've done a backup and restore using Windows Backup. For some of ...
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2answers
3k views

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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0answers
165 views

XenServer 6.2 VM Performance (SSD, RAID-10, Quad-core)

Greetings everyone :) My configuration is the following: HP C3000 tower enclosure 1st HP Proliant BL460 G1 quad core xeon 2.66GHz 12MB L2 cache, 24GB RAM, BIOS I15 5/2/2011 partnered with HP ...
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0answers
15 views

Access Xenserver virtual machine in lan

I have created two virtual machines from xen server. both vm are Ubuntu server. I have hosted a application in one of the vm. It works fine. But I dont know how to access that application from other ...
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3answers
233 views

Booting from RAID5 device

I have an xenserver and I wonder to know if it's possible to boot it from a RAID5 software partition.
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2answers
55 views

Live Migration - Switch Infrastructure

We will be deploying into an environment intended for maximum resilience/redundancy and the capability for rapid scalability. Context This environment is: 1 x NAS server with FreeNAS RAID 2 x ...