Questions tagged [xen]

XEN is a hypervisor based virtualization technique.

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How to remove a logical volume from xen vm after failed snapshot

First of I'm fairly new to xen vm technology so sorry in advance if I use the wrong vocabulary. So what happened is I took a snapshot from my vm, after a while a cronjob tried to create a second ...
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The ova file exported by ovirt-engine cannot be imported into Xen server

After exporting the ova file from the ovirt-engine KVM virtual machine, I got this error when I tried to import the ova file back into Xen server: 2022-01-17 15:51:40,844 INFO XenOvf.OVF [Main ...
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How to enable networking on domU

I'm using ubuntu 20.04.3 LTS and I have created a domU but it doesn't have networking. What is the best way to go about enabling networking? So far I have tried brctl addbr xenbr0 interface brctl ...
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Xen: is possible to see processes of the domU on dom0?

I have installed on a Debian dom0 a paravirtualized domU(Opensuse) When I use lxc I can see the process with the "translated" uid for example, on a Slackware lxc "host" I can see ...
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Can I use KVM in a VM running by QEMU?

I'm running a ARM64 Linux VM. Is it possible to use KVM (or Xen) inside that VM?
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How to configure xen for displaying guests VM on separate display (monitor) from a raspberry pi 4?

I have set up the Xen on a Raspberry Pi 4. The dom0 is a Ubuntu-base 20.04.3 OS. The Xen is running fine. I have also created ubuntu-base domU. I was able to create the VM using xl command and connect ...
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What is the maximum amount of memory that can be allocated to a 32-bit Cent OS 6.5 Xen server virtual machine?

When I creating a 32-bit virtual machine with Cent OS 6.5 on Xen server 7.6, the following error is reported when the memory setting of the virtual machine exceeds 16G: the amount of physical memory ...
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Find what is causing high CPU usage on Qubes OS

In Qubes OS, processes are running in multiple VMs, so just running top on a VM won't necessarily tell me anything useful, if that VM isn't using the CPU very much. How can I find out which process(es)...
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Where are libvirt's VM definitions "originals" stored, and how to sync them across multiple nodes?

Migrating from Xen's xm to Xen's xl under control of libvirt, I wonder: Where does libvirt store the "originals" of VM configurations? I found that my PVM configurations are stored in /etc/...
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Resizing a LVM partition

I'm running XCP-ng and I want to mount a partition in which I can store ISOs. I want it to be 30Gb out of the 2Tb storage that I have. Can someone help me with this? I've tried gparted but it doesn't ...
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How can I set the current value of vCPUs lower with Citrix XenServer 8.2?

I've setup my VM as so: Note: It's initial number of vCPU is 2 Later, I increase it but notice that there's no way to decrease it: Question: Is there any way to change the current number of vCPUs ...
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Xencenter server with failed disk mirror - LVM - I am unsure how to proceed

I'm having a serious problem with an older server I inherited running Xencenter. The VM would no longer boot with a VDI unavailable error.. I began troubleshooting as much as I could but I have very ...
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Debian Buster, Xen and Docker - Network bridge issue?

I have a small home server running Debian. On this server I have a few VMs running and I recently installed Docker. I was actually planning to remove some of the VMs and use containers instead. The ...
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When making a VM, why would I want to not pass it all my cpu cores?

(I'm using xcp-ng/xen as my hypervisor but general question as I also wonder this about qemu/kvm and virtualbox when I use them) whenever I make a VM, I have an option to give it as many cores as I ...
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Blacklisting nouveau driver and bochs_drm don't work at all in the xen / ubuntu 20.10 guest os

I'm trying to passthrough my nvidia GTX 1060 from ubuntu 20.10 host to xen with ubuntu 20.10 guest os. Below you can see how is configured everything (default vga display adapter / nvidia 1060 driver ...
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XEN: Cannot Install Centos 8 as PV-based DOMU with Debian 10 DOM0

My goal is to install CentOS 8 as a Guest/DOMU on a Xen system managed/installed via Debian 10. I need to use PV since the hardware doesn't support HVM as it is quite old. HVM would obviously simplify ...
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xen and the support for spice GL

To make a long story short,I tried to pass through my two kinect 2 devices from ubuntu 20.04 to a two qemu / kvm virtual machines,where on the first one I have also passed through my RTX 2080 ti and ...
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How do I send emails via msmtp from inside XEN DOM0

I have a XEN server with someVMs, one of them is the email server. How do I tell DOM0 to send all root emails to my administration email, which is inside the email-VM? I tried install msmtpd and added ...
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Not all XEN VMs auto start after reboot of DOM 0

On my Xen host (systemd in Debian Buster, Xen 4.11), I usually start all guest VMs automatically. I added all my VM configs as link in /etc/xen/auto/ to the underlying config like /etc/xen/auto/proxy....
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Cannot boot new VM, when copied from one XEN-host to another

n my Debian 10 (buster) XEN Host, I copied a Xen-VM that is using Debian jessie from an LVM-snapshot into a new xen guest and tried to start it. This is what I did: Copy xen VM to test a dist-upgrade ...
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Copy xen VM to test a dist-upgrade of a mailserver

I use Xen with LVM and want to clone my mailserver VM vm01.mail-disk with courier/postfix in Debian jessie to test if an upgrade is easily feasable. How do I clone the VM and what do I have to change ...
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Relationship between AWS EC2 VPC and Xen Networking

Does characteristics of networking configuration on AWS VPC (public IP, private IP, subnets, route and gateway) are derived of Xen networking model?
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Xen pvgrub with lz4 compressed kernels

I am running PV guests on xen 4.11 with pvgrub. The recent releases of ubuntu (>19.04) look to have switched to lz4 compressed kernels. These kernels work fine with direct boot, but under pvgrub and ...
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Copy VM from Xen hypervisor

I have copied (using dd command) a whole disk of Debian7 VM running on Xen server. I was able to convert the raw image to the kvm format (qemu-img). Than I've created new VM and attached disk image (...
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XenServer 6.5 Trying to launch VMs from Local SR

Let me being by saying I am new to Xen Server, I’m come for the telecom/networking world, but now I find myself managing servers. With that being said I am looking for assistance with setting up a ...
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clone complete XEN LVM server including all VMs

I ordered a faster Hetzner root server to move my XEN mashine there with all volume groups, lvm-volumes and VMs. I already started to create the same xen VMs there, copy config files and userdata and ...
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Xen Server: Free memory != dmidecode -t17 output

Overview I'm running a Xen server on Debian buster. Latest kernel, latest BIOS version, legacy boot. Booting into Xen server only shows 8 GB of RAM free while recognizing 16 GB of RAM connected. ...
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Unable to complete install: 'unsupported configuration: emulator '/usr/lib/xen-4.11/bin/qemu-system-i386' not found'

Log: Unable to complete install: 'unsupported configuration: emulator '/usr/lib/xen-4.11/bin/qemu-system-i386' not found' Traceback (most recent call last): File "/usr/share/virt-manager/...
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resize a xen virtual disk

I have a VM running on my XEN host which goes low on diskspace. It has mounted its volume as /dev/xvda2 formatted with a ext4 filesystem. This is my xen config for the VM: # /etc/xen/vm04....
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How to debug laptop S3 suspend problems on Xen/Fedora?

I'm running Qubes, which is basically Xen with a Fedora 25 as dom0. The only thing that does not work properly is when I close the notebook lid or press suspend. When I open the notebook again nothing ...
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Create Xen guest with preinstalled packages and settings

For context, I'm creating a script to simplify the process of creating xen guests. The script uses xen-create-image and uses a bunch of flags to set as many useful settings as possible (distro, vg, ...
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4 votes
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How to load additional modules when Xen hypervisor is loaded?

I'm currently running Debian 10 with Xen 4.12 installed. I compiled Xen from source on another machine with the below steps: ./configure --target=x86_64 --with-platform=efi --enable-systemd make ...
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Unable to reach network from host systems (guest systems are working)

After updating my server to the latest version of Xen (4.11.1 on Debian) I don't have a working internet connection on my host system (the guest systems have access). I'm not really sure if the ...
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Exported ova failed to import in xcp-ng center

I have exported a centos7 ova file and I am trying to import it into XCP-ng 8.0 using XCP-ng center 8.0.1. But This error shows.
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Error "Attempt to create a HVM guest on a non-VT/AMDV platform" when Intel VT-d is enabled in BIOS

I'm installing XEN on an older Vernonia server with a Cloverdale VT-d compatible CPU, either an S5000XVNSATAR or S5000XVNSASR, a 2006 design with some documentation still available. This problem is ...
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1 answer
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How does the BIOS work in a Xen virtualized environment?

On a physical machine, the BIOS is located on a chip that sits on the motherboard. How does with work in a Xen virtual environment? Any links to documentation/articles will be appreciated.
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What is better to install to virtualization on ubuntu? [closed]

i have home server and i want virtualize all my hosts (web,radio, tracker, file server etc) to use more then one OS. So for host OS i want install Ubuntu-server on HDD 500gbx2 Raid 1. i want to ...
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tcpdumping virtual network on the Oracle Virtual Server

Is there a way to enable proper promiscuous mode in Oracle Virtual Server based virtual network? It seems like card is getting only some percents of total network traffic. I have tried all of the ...
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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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1 answer
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Qubes-OS transfer files from and to HVM

I can't find in the documentation how to transfer data from and to the HVM in Qubes-OS. When a normal AppVM is created, it has the Qubes Tools installed so easy copy and paste, and transferring files ...
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Can Xen (using it with SLES 11.4) run SLES 12.3 as guest?

Would there be any issue using Xen (hypervisors OS level: 11.4) with a guest that would have SLES 12.3? Are there any table that describes which Xen OS version is compatible with which SLES version? ...
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Can you assign different DNS servers to different network interfaces?

I am trying to have my eth1 use 10.50.1.11 and 10.50.1.12 dns servers whilst my eth0 interface uses 8.8.8.8 and 8.8.4.4 dns servers. I am running centos 7 vms within xenserver 6.5. eth1 is a closed-...
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CentOS 7: Unable to complete install: internal error: libxenlight failed to create new domain

I have a problem with the installation XEN on CentOS. I did everything through virt-manager, I did not try through the commands, but there should be the same error as I understand it. Worth the ...
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Xen on Ubuntu 18.04 with IPv4 (NAT) and IPv6

I'm renting a dedicated server at Hetzner and installed Ubuntu server 18.04 LTS on it. I've got two public IPv4 addresses named x.x.x.x and y.y.y.y and one IPv6 /64 block for connecting my private ...
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What's wrong with my Xen bridge configuration

I'm on Debian 9 (stretch): $ cat /proc/version Linux version 4.9.0-3-amd64 (debian-kernel@lists.debian.org) (gcc version 6.3.0 20170516 (Debian 6.3.0-18) ) #1 SMP Debian 4.9.30-2+deb9u5 (2017-09-19) ...
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How to enable networking for xen guest

I have a really weird one. The setup is an ubuntu 16.04 host, with xen installed. I'm using virt-manager on my mac to manage the machines. I've added a bridged network then I attempted to add a ...
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2 votes
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915 views

How To Find BASH Shell Array Length (number of elements)

I have the following matrix: LCANTIDAD_VM_=4 while [ $i -lt $LCANTIDAD_VM_ ]; do VM_NAME_=$(xe vm-list is-control-domain=false | head -n -$aux2 | tail -1 | cut -d ":" -f 2) VM_NAME_=$(trim $...
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1 vote
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After upgrade, Debian can access internet, but not local network [closed]

I recently upgraded from Jessie to Stretch, and now, while I get an ip address from my router (which is also showing up properly as my default gateway, at least according to "ip r"), and I can access ...
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On Qubes OS 4.0, how to get xl console access to sys-net?

I tried xl console sys-net which is something that works for any other VM (AppVM, TemplateVM), it even works for sys-net-dm (I don't know what that is though) [ctor@dom0 ~]$ time sudo xl console ...
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libvirt and virt-manager - Unable to complete install: 'internal error: unsupported input bus usb'

I'm following the steps below to create a virtual machine using Xen as hypervisor and virt-manager (libvirt) as the management module. When trying to create the virtual machine I am getting the ...
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