Questions tagged [xen]

The Xen® Hypervisor, is an open source virtualization platform that powers the world's largest clouds in production and is the foundation of many commercial products.

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X11, VNC, and Xen: Can't open display

I've been trying to configure Windows 10 with Xen, and I've hit a wall. xl create creates the VM (I can see it in xl list), but I'm not able to connect to it. I thought this might be a Wayland issue (...
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82 views

Run Windows and Ubuntu at the same time and access them via remote desktop

I am a developer and I am currently working on a project that needs to support macOS, Windows and Linux. I usually work on a MacBook with virtual machines but for this project this just doesn't cut it....
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92 views

libvirt/libxl: Attempting to attach a virtual floppy disk is met with failure

The problem is, I am attempting to attach a pool of floppy disks for installation of MS-DOS in a VM (for some old games that cannot run full speed on modern hw), but when doing so that is met with ...
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2answers
623 views

Citrix-hypervisor VS Xenserver

What's the difference between citrix-hypervisor and xenserver ? On the official website of citrix, you can see they provide both softwares, but i feel like it does the exa ct same thing, but then ...
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1answer
667 views

XenServer / xcp-ng networking set up virtual NAT with port forwarding

I have setup XenServer having a single physical NIC(PUBLIC IP) with couple VMs on it, now i need to be able to create a virtual network (LAN) with NAT allowing the VMs to communicate with each other ...
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112 views

Ethernet Bridge to Xen VM not working

i'm using Ubuntu 18.04 to run a windows 7 instance in Xen. But the issue is i don't get any internet in the windows7 guest, in dom0 it's working fine. Here is my netplan yaml: # Let networkd ...
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1k views

Hetzner reported not allowed MAC addresses in subnet

We had email from Hetzner network team asking us not to use MAC addresses belonging to the Virtual Machines belonging to the subnet. We configured Xen server host as a router using this guide. After ...
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1answer
42 views

XEN: map object has no attribute index error when installing a new virtual machine

I'm setting up a new server to run tests. I'm using Xen as virtualization Hypervisor and I've already successfully installed another server with Opensuse Leap 42.3. Now I'm trying to use Opensuse ...
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286 views

Reactivating Windows 10 OEM guest after transferring from Xen to Virtualbox

I had a Windows 10 Pro (OEM) installation running as a guest on a Xenserver 6.5 host. The host has crashed and I copied the VHD file directly from the host to another host running Virtualbox. I was ...
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365 views

Xen on Ubuntu Server 18.04 stuck after boot

I have setup an Ubuntu Server 18.04 Machine where I installed Xen Hypervisor via the following: sudo apt install xen-hypervisor-4.9-x64 Installation went fine, but after reboot (after POST and ...
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198 views

SSH into Xen Virtual Machine refused

While practicing for SysAdmin certification, I spun up a virtual machine. I could not SSH into it from my laptop on my LAN. I could SSH into the VM from within the host OS. After some reading and ...
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255 views

XenServer 7.5 Virtual Machines not booting without installation media

I recently turned an old gaming computer into a server and decided to put XenServer 7.5 on so I could flip between Windows and Linux servers. Installation of the hypervisor went well and I proceeded ...
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124 views

Logon script for Citrix Xendesktop to create shared folder based on IP address

This is a bit over my head, but I've been tasked with writing a script to create a shared folder per login, based on the third IP address octet of the client device, ( thin client terminal). It's ...
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54 views

With Xen, is memory that's not allocated to dom0 or domU actually used for anything?

The recommendations for Xen seem to be to set the amount of memory for dom0 to between 1GB to 4GB. But if after allocating memory to virtual guests we have memory "left over", is that actually used ...
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1answer
105 views

Save machine state to disk in Xen

After numerous issues and problems with Linux kernel committing the state to disk (aka STD/Hibernate) I decided to resort to VM instead. I wish to know if it's possible to commit the entire state of ...
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76 views

Linux 4.13 crash when run under xen 4.9

When I start linux-4.13 under Xen hypervisor it fails in early_iounmap procedure at start: Hardware: Lenovo Thinkpad e330, 8 G RAM cpuinfo: processor : 0 vendor_id : GenuineIntel cpu family : ...
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984 views

How do I completely remove Xen or at least stop these errors from occurring?

I installed the xen-hypervisor package but that froze my system, and didn't know how to solve it so I compiled from source. That exhibited the same issue so I assumed it was hardware related, and ...
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550 views

failed to read BIOS file: No such file or directory

I'm trying to install CentOS 7 in a VM from an ISO, but I keep getting an the error libxl_dom.c:892:libxl__load_hvm_firmware_module: failed to read BIOS file: No such file or directory. Here is my ...
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895 views

difficulties in xen server vm creation

I'm executing xl create /etc/xen/config_vyos.cfg and getting an error: Parsing config from /etc/xen/config_vyos.cfg libxl: error: libxl_bootloader.c:637:bootloader_finished: bootloader failed - ...
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145 views

cpu over description with ganeti

first of all happy new year every body :) I am planing a Ganeti cluster with 10-12 virtual machines, I assume the workload will be very low since its running in my home lab, so allocating one vcpu to ...
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138 views

Connect physical device to virtual Xen-network

I have a large Xen-server running multiple virtual hosts in a variety of virtual networks. Now there is also the need for physical devices that cannot be virtualized easily to be connected to some of ...
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1answer
309 views

Error using Xen-server 6.2 “File System on Control Domain Full”

I have been getting this error and i can't even upload new patches on the server. Is it wise to delete all the ".gz" logs on server from "/var/log"? I have removed all the entries except the "/...
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156 views

What's the rationale behind disabling USB controller PCI passthrough in Xen 4.6?

Let me expand on the title, which really is my question. I upgraded from Ubuntu server 14.04 to 16.04, breaking my virtualization setup (passing from Xen 4.4 to Xen 4.6). In the process of mending, I ...
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585 views

Xen booting stuck on 'Loading initial ramdisk…'

After successfull instalation of xen, The xen kernel cannot booting and stuck on Loading inital ramdisk I followed the instalation tutorial from here. I'm using centos-release-7-2.1511.el7.centos.2....
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303 views

How to run a XEN virtual machine ontop of a RHEL 7 installation and then run windows 7 pro 64-bit ontop of/in the XEN VM

I would like to run a XEN virtual machine ontop of an RHEL 7 installation and then run windows 7 pro 64-bit ontop of/in the XEN VM. How best can I go about it. Re: the baseline RHEL 7 is properly ...
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2k views

Booting Xen guests with UEFI

Now that UEFI is gaining widespread adoption, is Xen able to boot guests using an emulated UEFI? If so, can secure boot be used for these guests?
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562 views

how do i automatically back up Citrix Xen server VMs to a backup server?

I want to backup the VMs on a Xen server to a backup repository automatically using a script. I have a windows and a Linux backup server so which ever one is easier to do would be great. Is there a ...
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227 views

Cannot boot migrated Ubuntu VM on fresh XenServer install

It's been a tough couple of days. My server configuration went crazy after a power outage, and now I'm trying to get my VMs back up and running. I reinstalled XenServer to a new SSD in the same box. ...
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659 views

really check if password has been changed

On a non-critical server (Debian 7, kernel 3.2.65 x86_64) running under a Xen VM framework, it's a system I log on once a month under "user1". Today I: - cannot log as user1 via ssh+password - can ...
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1answer
2k views

Xen Hypervisor with linux host and Win7 guest - gaming

I'm a bit of a newbie in the linux community, and especially in virtualization. I discarded Windows a while back and moved to linux, mainly because my university uses Ubuntu on their computers, and it'...
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140 views

is it possible to paravirtualize 32 bit linux kernel on x64 xen hypervisor

If I have a 64 bit Xen kernel (hypervisor) can I run paravirtualized x86 linux guests or does it need to be fully virtualized, just like windows? I would like to install all small memory guests as ...
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488 views

Backup Windows 2008 R2 Server to a ISO file

I want to virtualize a Windows 2008 R2 Server system for testing. At the moment the system in question is installed in a server and I want to make a copy of everything to an ISO file to then ...
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1answer
144 views

Is it possible to stealthy boot into a Xen virtual machine? i.e. so no one sees Xen

Since Xen is a type-1 hypervisor and not a type-2, is it possible to boot into a Xen virtual machine seamlessly as if it there was no hypervisor underneath it? I'm talking about it being such that all ...
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75 views

Setting up OpenStack environment on virtual machines

I am learning OpenStack for almost a week. After reading most of OpenStack wiki, my mind still blurry at some point. However it is said OpenStack nodes could be installed on virtual machines (VMs) for ...
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1answer
363 views

Xen VPS with 2 IPs from 2 different subnets

I am new to Xen and I am trying to understand how to add 2 different IPs on the same guest VPS. First, I am going to explain my node setup, which is a physical server with 32GB RAM and 2 NICs on it. ...
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482 views

KVM or Xen for VGA Pass-through

I'm in the planning phase of setting up a personal virtualization server. One of the virtual machines I want to setup is a Windows box with Steam. Ideally, I want to stream higher-end games to my ...
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98 views

Export from xen to azure

I want to move a Ubuntu Server VM from Xen to Azure Cloud. I exported the VM to a xva format. I converted it to ovf using Citrix XenConvertor and I obtained the vhd file. In Azure I created a disk ...
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1answer
1k views

Script to monitor realtime CPU & Bandwidth usage in xen live migration

I need to write a script (bash or python or ??) to perform live migration of a VM in xen, and to simultaneously log and extract the CPU & bandwidth usage of the Domain-0 AND write the output into ...
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1answer
750 views

VPN remote access to lan

I am rather new to this. I have done some it/cyber defense competitions in the past and have some knowledge. I am trying to set up a group of about 5-6 xenserver boxes. I want to use xencenter to ...
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1answer
597 views

How to get cpu cores utilizations in xen?

I have installed xen as hypervisor and there are dom0 and some paravirtualized machins as domu VMs on it. I know xentop is used for checking the performance of system and virtual machines, But, it ...
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1answer
1k views

Can KVM run on top of host OS?

I was interested in experimenting with Xen until I discovered that it has to be installed bare metal. Hence, if I have a Linux machine and want to use it to run a Xen hypervisor, I have to install the ...
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319 views

In XEN how can I check if guest is HVM or PVH?

Xen supports various visualizations e.g. para virtualizastion and full hardware visualization. How can I know the type of visualization for running guest?
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1answer
723 views

Why I can boot various kerel versions but not XEN kernel in grub2

I have successfully compiled XEN usigng following steps: wget http://bits.xensource.com/oss-xen/release/4.4.1/xen-4.4.1.tar.gz tar xzvf xen-4.4.1.tar.gz cd ./xen-4.4.1 export C_INCLUDE_PATH=/usr/...
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908 views

Xen Bridge Configuration do not bridge eth1 to xenbr0

I am new on Para-Virtualization. I used Xen Beginners Guide to install Xen and configure dom0 it works correctly but i cant configured bridge network for domU. I created debian image like that. xen-...
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1answer
4k views

Where are Xen guest config files stored?

I'm new to Xen stuff. I have a XenServer 6.5 running, with XenCenter and a Debian installed as a PV VM. I'm trying to setup the extra security now so I don't have to learn about it after I've been ...
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2answers
652 views

Backup Xen VM without snapshot

I have a VM in a small XenServer 6.2 and I would like to back-up it before performing an upgrade. The current storage doesn't have enough space to do a snapshot, so I cannot export it. Is there any ...
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201 views

Can I add a Hypervisor to my Windows Desktop and still use the consoles?

I am running Windows 7 Ultimate (for business) and would like to slip Xen or free ESXi (vSphere Hypervisor) in between my current Windows image, and the hardware layer, and still be able to use my ...
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1answer
2k views

Relationship between OpenStack and Xen

Xen is an open source virtualization platform that allows you to install a bare metal hypervisor on a machine, which turns it into a host for other guest VMs. I can't really understand what OpenStack/...
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458 views

How to “sandbox boot” an operating system in a Hypervisor without a full blown host OS?

I was wondering how I could setup a Hypervisor environment that boots an operating system in in a sandboxed¹ mode, without relying on a (full blown) host (Dom0) operating system. The target ...
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603 views

Getting a 4TB USB drive (4k native sector size) to work with Xen and Windows 2008 guest

I am trying to get a new 4TB Seagate USB drive to work with Xen 6.2 and a Windows 2008 R2 virtual guest. The Xen host sees the drive fine, fdisk -l lists it with the correct capacity, etc. I can ...