Questions tagged [xen]
XEN is a hypervisor based virtualization technique.
208
questions
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22 views
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/...
0
votes
0answers
14 views
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 ...
0
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0answers
4 views
Is it possible to read console messages immediately with Xen PVM?
Using Xen for a long time, I had noticed that there seems to be some delay between loading the VM's Linux kernel and seeing the first kernel "console" message (like when using xm create -c ...
0
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0answers
62 views
How to properly install Xen and libvirt on Fedora 33
I want to setup a Qubes OS like environment using just Fedora, Xen, libvirt and quemu.
After configuring the Xen hypervisor, how can I make the network accessible from one "network VM" only? ...
0
votes
1answer
16 views
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 ...
0
votes
1answer
12 views
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 ...
0
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0answers
19 views
Why does Xen need a transfer VM to export a VM?
Using Xen Server and Xen Center, if I want to export a VM, it creates a "Transfer VM", which needs to be attached to a network, in order to save the VM I want exported to my computer. Why?
...
0
votes
1answer
45 views
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 ...
3
votes
2answers
221 views
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 ...
0
votes
1answer
133 views
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 ...
0
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0answers
15 views
add vsyscall=emulate to the kernel inside a XEN virtual mashine
I would like to add vsyscall=emulate to the kernel. All tutorials I found said I can do this by adding it to GRUB_CMDLINE_LINUX_DEFAULT in /etc/default/grub. But this works different in XEN virtual ...
0
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0answers
20 views
Utility to read and set time of Xen hypervisor?
Running PVMs in Xen I learned that there are at least four "system times":
The time in RTC (hardware Real-Time-Clock)
The time in the Xen hypervisor
The time in Dom0
The time in a PVM
When ...
0
votes
1answer
222 views
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 ...
1
vote
0answers
56 views
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 ...
0
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0answers
121 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 ...
0
votes
1answer
31 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 ...
0
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0answers
16 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 ...
1
vote
3answers
242 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....
0
votes
1answer
139 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 ...
0
votes
1answer
38 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 ...
0
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0answers
21 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`...
1
vote
1answer
57 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?
2
votes
1answer
579 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 ...
0
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0answers
22 views
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 ...
0
votes
1answer
94 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 (...
0
votes
1answer
14 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 ...
1
vote
1answer
38 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 ...
0
votes
0answers
16 views
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 ...
1
vote
1answer
106 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.
...
0
votes
1answer
459 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/...
1
vote
2answers
297 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....
1
vote
0answers
41 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 ...
3
votes
1answer
89 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, ...
4
votes
1answer
138 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 ...
1
vote
1answer
64 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 ...
0
votes
1answer
623 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.
1
vote
0answers
71 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 ...
1
vote
1answer
34 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.
0
votes
1answer
43 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 ...
0
votes
0answers
66 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 ...
1
vote
2answers
938 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 ...
2
votes
1answer
814 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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votes
1answer
83 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? ...
2
votes
1answer
1k 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-...
1
vote
0answers
506 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 ...
0
votes
1answer
647 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 ...
0
votes
2answers
309 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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0answers
133 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 ...
2
votes
1answer
635 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 $...
1
vote
1answer
163 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 ...
