Questions tagged [xen]

XEN is a hypervisor based virtualization technique.

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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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46 views

xen guest gives the message “guest has not initialized the display (yet)” and it is freezes there forever

I'm a new xen user. I'm learning how works the xen hypervisor that I have installed on ubuntu 20.04 with the command : apt install xen-hypervisor. I want to boot the phisycal installation of windows ...
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21 views

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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11 views

KVM alternative for Xen XM-FLASK

Because of PCI DSS requirements we need to manually compile Xen with the XM-FLASK module and set the hypervisor to enforced. Since I'd like to consider using KVM instead, I was wondering if there's a ...
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120 views

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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59 views

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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33 views

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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19 views

xl commands don't work in openvpn scripts

I have script with xl command (Xen 4.9) which run by OpenVPN (Ubuntu 19.04). In my openvpn config: script-security 2 up /etc/xen/scripts/vpn.sh In my script commans like this: TEST=`xl domid test`...
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46 views

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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320 views

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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XEN Dom0 Upgrade with old PV-DomU

I Upgrade my Dom0 from 4.1 -> 4.11 (Debian 7 -> 10). Is it possible to run the old PV DomU on the new system? With the only trick to copy the old Debian 7 kernel to /boot of the Debian 10 Dom-0? It ...
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61 views

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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11 views

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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1answer
35 views

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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extracting all system calls and information from xen regarding the vm

I have a XEN hypervisor (ubuntu) with several VMs. What I want to do is capture all information of VMs system call /hypercalls to hypervisor (without any intervention to VM whatsoever) in real time ...
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176 views

Xen on Ubuntu 18.04 with IPv4 (without NAT) and IPv6

similar to the Xen on Ubuntu 18.04 with IPv4 (with NAT) and IPv6 I try to set up the netplan configuration for XEN from ubuntu 18.04 with multiple public IP addresses. So far my configuration looked ...
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1answer
68 views

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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250 views

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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How can I successfully deduplicate XenServer virtual machine image dumps?

I am trying to use restic to backup XenServer virtual machine images, but when I backup the same unchanged virtual machine image the repository deduplication does not work: the repository gets twice ...
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21 views

Xen Hypervisor Going on dracut shell

I have xenserver running multiple VMs. Every time I run VMs, it goes to dracut shell with following error.
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2answers
166 views

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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35 views

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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32 views

What is the difference between xen netbk/vif and tap?

When I'm using libvirt with QEMU/KVM backend, then it creates a tap type network interfaces for guests. However, I have one server running xen as an hypervisor and looks like it creates netbk/vif type ...
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64 views

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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99 views

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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1answer
47 views

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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381 views

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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58 views

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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1answer
30 views

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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41 views

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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60 views

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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2answers
814 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
629 views

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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1answer
80 views

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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492 views

Xrandr increase resolution black screen

When I try to increase the resolution in my virtual machine (Xen), running a debian distribution (Kali/Parrot in this case), I get a black screen. I use xrandr, because in the GUI, the max resolution ...
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1answer
998 views

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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417 views

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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1answer
571 views

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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2answers
209 views

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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125 views

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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1answer
552 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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1answer
122 views

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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1answer
507 views

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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1answer
1k views

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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29 views

Trouble installing a Linux VM on XenServer 7

I've been struggling to get a Linux guest running on XenServer 7.5. Here is a sequence of commands that I've been running -- don't get any errors -- except when I run the VM, it does not seem to be ...
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418 views

How does fstrim keep finding bytes to trim on a Xen PV dom0?

I have a Xen PV node running RHEL6 on the 3.10 kernel. This node has mdadm RAID1 and the following partitions: [root@node ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/md1 ...
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108 views

How can i change the resolution of the console that is provided by the XL toolstack?

How can i change the resolution of the console that is provided by the XL toolstack? i use command like this: xl console domU This provides me with a console, but it seems, the resolution is too low....
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610 views

How can i create a bridge with the ppp0 interface?

How can i create a bridge with the ppp0 interface? Currently i have a ppp0 interface (USB Modem) and i want to create a bridge to use it with the XEN DomUs. Is this possible? My current bridge looks ...
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2answers
3k views

Delete and reinstall a VM in a Xen server

How do I completely delete an old VM in a Xen host? I want to reinstall the vm new from scratch with xen-create-image --hostname=something --size=8Gb --swap=2Gb --memory=1Gb --ip=10.77.77.105 --...

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