14 votes
Accepted

Is Administering XenServer like administering CentOS?

Keep in mind that the OS is stripped even if based on a release, as if the gear is in the HCL, you will mostly never use any OS command. Most command you will ever use to administer it would be in ...
yagmoth555's user avatar
  • 17.1k
10 votes

Is Administering XenServer like administering CentOS?

Primarily, you are committing to work in the XenServer way. This product is essentially an appliance and most of the things that are different between Debian and CentOS are hidden from you anyway or ...
Sven's user avatar
  • 99.5k
9 votes

Unable to extend partition with gdisk on XenServer 6.5

Let gdisk verify the disk for problems (key v). In my case it identified: The secondary header's self-pointer indicates that it doesn't reside at the end of the disk. If you've added a disk to a RAID ...
klaus thorn's user avatar
6 votes

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

I've been using Starwinds V2V converter https://www.starwindsoftware.com/converter for a similar task a while ago. It supports multiple virtual machine disks formats and does internal hardware ...
Net Runner's user avatar
  • 6,229
6 votes
Accepted

USB passthrough (non storage) to XenServer 7 VM

Not supported Sorry. This has been a requested feature since 2007. And as of 2016 it is still unsupported. You may have to buy a dedicated USB-to-Ethernet dongle server. I have no experience with ...
StackzOfZtuff's user avatar
6 votes
Accepted

How can I convert a iSCSI system disk from XenServer to another format

To get disk image do P2V and/or V2V: attach iSCSI to Windows by ISCSI initialtor. create VHDX using Disk2vhd (https://technet.microsoft.com/en-us/sysinternals/ee656415.aspx) convert VHDX to QCOW ...
Mr. Raspberry's user avatar
5 votes

Some questions about xenserver HA

Yes, you can do HA for the scenario you have described. To do so, you create an iSCSI target with multipathing and setup shared volume on top of it. Connect each compute host to target and check the ...
Mr. Raspberry's user avatar
5 votes
Accepted

What would cause a XenServer 7.2 Windows 2019 VM to not release Driver Locked Memory back to the OS?

It is a known bug with Xentools drivers: https://discussions.citrix.com/topic/393322-memory-leak-on-xenserver-72-with-xentools-installed/ https://discussions.citrix.com/topic/391945-topic-memory-leak-...
batistuta09's user avatar
  • 9,106
4 votes

Ubuntu 16.04 Virtual Machine / XenServer Storage Extend Issue

I am not sure exactly what steps you followed, But below three things need to happen to increase the disk available to a Linux VM: Increase the disk size available to a VM in XenCenter. Increase the ...
Sachin Singh's user avatar
4 votes
Accepted

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

There was the same question on Reddit. The main idea — you need to regenerate initrd. Boot into linux rescue Call dracut -f according to this article.
Константин Носов's user avatar
4 votes
Accepted

Converting Linux machine from XenServer to Hyper-V

EDITED ANSWER: I've been thinking about your problem, and I think that rsync or dd backup/restore might be your best bet. If you are using dynamically growing vhdds, then rsync is probably your best ...
Aubrey Robertson's user avatar
4 votes

7Zip extraction on linux is so slow

I had the same issue, and the fix was to upgrade 7z. On Ubuntu 20.04 LTS, the 7z you get from apt install is from 2016. Instead, go download the latest version from the official website. For the same ...
bfontaine's user avatar
  • 141
4 votes
Accepted

Is there a command to scan an existing XenServer storage repository for VMs?

It is no such easy way and according to my experience, it is easier to reattach the disks to newly created VMs. However, check this article https://support.citrix.com/article/CTX136342 (Restoring the ...
Stuka's user avatar
  • 5,775
4 votes
Accepted

Differences between VMware and XCP-ng Hypervisor

Did I get that right? Almost. vSphere does have feature called Fault Tolerance, which enables seamless host-failover through running the guest VM on all (configured) hosts. vSphere also has a feature ...
bjoster's user avatar
  • 4,907
3 votes

How to unhide a VM in Xen?

Current accepted answer is not safe to execute, as commented by @user160198, it will clear all params. This should have been an answer instead of comment. xe vm-param-remove uuid=<vm-uuid> ...
LifeH2O's user avatar
  • 169
3 votes

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

The following is a straight quote from the Red Hat 6 help link, in case it fails. It seems everything is based on using virt-v2v now, and doing an offline xva to kvm isn't so simple. Try the virt-v2v ...
Tom Koch's user avatar
3 votes

My Dell 1950 iii can't enable Virtualization Technology (VT-x)

Under CPU/PROCESSOR SETTINGS you should be able to set VIRTUALIZATION TECHNOLOGY to enabled, as shown here
shodanshok's user avatar
  • 50.5k
3 votes
Accepted

Any possible way to read RAID health status within Xenserver without rebooting?

1) There are two different utilities for managing LSI SAS controllers: mpt-status (opensource) and lsiutil (proprietary). Both are described at http://hwraid.le-vert.net/wiki/LSIFusionMPT page. 2) ...
user2743554's user avatar
3 votes

Is Administering XenServer like administering CentOS?

I work with Xenserver almost every day. In a simple server or small pool there would be very little need to interact with the underlying OS ever, which is the point. But we have 60+ xenservers and ...
Criggie's user avatar
  • 2,320
3 votes

Some questions about xenserver HA

Q: My last question, on my ISCSI if a hard drive crashes the data are lost if I understand correctly? so I would like to know if you have to do a raid or backups instead? without losing too much space ...
BaronSamedi1958's user avatar
2 votes

GPU support on OpenStack/CloudStack

There is support in Cloudstack for GPU support starting version 4.4. The design document is referenced at [1]
Antoine Coetsier's user avatar
2 votes
Accepted

Creating a XenServer VM from the Command-line

Ok, so eventually I found the answer to the problem I was facing. It turned out I must have had a corrupt install of XenServer, and after downloading the .iso again and reinstalling, I found that by ...
Oli Callaghan's user avatar
2 votes

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

I know that this answer comes in late, but I thought I would share how I got around this. I was also searching for an answer migrating CentOS7 VM's from XenServer 6.5 to Hyper-V 2016. I tried ...
user440188's user avatar
2 votes

Converting Linux machine from XenServer to Hyper-V

I know that this answer comes in late, but I thought I would share how I got around this. I was also searching for an answer migrating CentOS7 VM's from XenServer 6.5 to Hyper-V 2016. I tried ...
user440188's user avatar
2 votes
Accepted

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

I did a upgrade in the past and if Xen7 is compatible with your hardware you simply update over your old install. The datastore will be re-detected. (if you have a datastore separated from the Xen OS)....
yagmoth555's user avatar
  • 17.1k
2 votes

How to set up XenServer with OpenBSD?

Found the answer myself. You don't need more than one NIC on the XenServer host Use OpenBSD 5.9 [I was using 5.8] Allow Intel NIC emulation, as per https://discussions.citrix.com/topic/329848-openbsd-...
Neil McGuigan's user avatar
2 votes
Accepted

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

Your drivers will be in legacy mode, simply as that. An actual example from the competitor is like the e1000 (legacy) or vmxnet3 (optimised) in esx. I manage some pool and with xendesktop its hard ...
yagmoth555's user avatar
  • 17.1k
2 votes
Accepted

CentOS 7 guest fails to boot on Xenserver 7.0

I solved the issue by using a "Misc" vm template in xenserver and not using the CentOS 7 template.
Rick Stewart's user avatar
2 votes
Accepted

XenServer -Virtual Disk not Active

According to your screenshot the two fields device path = unknown and active = no could indicated that drive 1 and drive 2 had been previously used in XenServer system and for some reason never get ...
Alexandre Roux's user avatar
2 votes

Poor man's virtual GPU, using a multiuser OS + GPU, instead of specialist vGPU card?

Talk to vendors to find this elusive document and what virtualized GPU architecture really looks like. Microsoft, Citrix, hypervisor, GPU. Do your research, and wait until you have a use case and ...
John Mahowald's user avatar

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