Questions tagged [xen]

XEN is a hypervisor based virtualization technique.

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1answer
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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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1answer
29 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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27 views

yocto Xen-Guest-Image-Minimal filesystem setup question

I have used poky/yocto project to create a xen-guest-image-minimal for Xen 4.9.0 (Ubuntu Server 18.04) running on a Xeon i586 processor. I am now preparing to create config file for the guest... and ...
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0answers
41 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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0answers
26 views

XEN guest crashes when downloading with wget

There is a SLES 11.4 XEN HV. There is a SLES 12.2 guest on it. The guest is stable, only when we download something from the internet, the guest is getting crashed! I think there is enough free ...
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2answers
221 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
106 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
38 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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137 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
118 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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0answers
110 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
247 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
39 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
494 views

Disk device paths Changes from xvd to sda, how do I change to xvd?, [closed]

OS Ubuntu '16.04.5 LTS' Hypervisor Xen This output is when sda df -h Filesystem Size Used Avail Use% Mounted on udev 16G 4.0K 16G 1% /dev tmpfs 3.2G 1.3M 3.2G ...
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0answers
76 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
252 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
51 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 ...
0
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1answer
209 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 ...
0
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1answer
539 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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0answers
39 views

Why Grub only sees disks but not partitions [closed]

I've been trying to setup Xen on EFI, and been following this manual. My bootloader lies on /dev/sdb, so I add -d /dev/sdb to the last efibootmgr command. Device Start End Sectors ...
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0answers
55 views

Setup loopback graphdriver devices in a XEN vm

I use a Xen Debian 9 host. there are no loopback devices in my vm: # losetup -f losetup: cannot find an unused loop device: No such device When I try to install docker-ci this fails with the error ...
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0answers
23 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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0answers
320 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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0answers
90 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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0answers
375 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
2k 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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1answer
663 views

Xen: Graphical output on domU after secondary GPU passthrough

I have done a secondary GPU passthrough to a Linux domU, but I don't know how to output Xorg from the secondary GPU. The dom0 is using an Intel integrated graphics card. I am passing through an AMD ...
0
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1answer
465 views

Does hypercall take the same time as a linux system call?

From Xen website, A hypercall is to a syscall what a hypervisor is to an OS. Alternatively, a hypercall is to a hypervisor what a syscall is to a kernel. A hypercall is a software trap from a ...
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0answers
163 views

Creating a bridged network for HVM

I am trying to create an HVM, which I can do on my server but not attached to any NICs (even with trying to configure a bridged network). When I try to use xl to run the cfg file with the MAC address ...
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2answers
248 views

Are containers and hypervisors an alternative to multibooting GUI-based distros?

Soon I will need to test GUI applications on multiple distros. Previously I've done this with virtual machines on VirtualBox, but using them can be frustratingly slow. I have considered multibooting, ...
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2answers
305 views

Check if CVE-2016-10229 is fixed in my XEN Debian Linux Server

I use Debian jessie on a Xen server and now I am concerned about the issue CVE-2016-10229: udp.c in the Linux kernel before 4.5 allows remote attackers to execute arbitrary code via UDP traffic ...
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0answers
13 views

Xen VM Login Access Reset or Alternate Method

I’m new to managing Xen servers and currently have a container that’s experiencing issues with network connection. The VM (from what I can tell) is starting up normally but doesn’t seem to have any ...
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0answers
144 views

Qubes (Fedora 23) won't login

I have been using Qubes 3.2 for 5 months now without any significant problems. Then, out of nothing, I can't login. Qubes passed to sddm login screen as usual, then I could choose from desktop ...
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2answers
840 views

XEN or KVM: which provides more reliable support for FreeBSD/OpenBSD guests?

Which hypervisor provides more reliable support for the most popular two BSDs? I read an article that Linode moved to KVM from XEN, and found a page named 'guest support status' on linux-kvm.org, but ...
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1answer
425 views

Xen server VM creation on ubuntu server

I have some problems in creating VM guest. 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:...
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1answer
148 views

Baremetal hypervisors vs Virtual Box

I have mainly been using Virtual Box for a while but have recently started using Xen which as led me to questions about Type 1 hypervisors vs Type 2 hypervisors. I have read a lot about the ...
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0answers
284 views

Virtual Lab on a server. What hypervisor? Proxmox, OpenStack, ESXi?

I would like to run a virtual lab to show a piece of software - imagine 10 students, each using 3 VMs (somehow students shouldn't be able to touch each other's machines). It's going to be a small ...
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0answers
88 views

Xen domU not resizing disk

My Xen server is using LVM for the domUs. I shutdown a domU and increased it's lv from 10G to 24G: lvextend -L24G /dev/xen-disks/my_domu which appears to have worked: --- Logical volume --- ...
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2answers
2k views

Why cannot I ping an xen domU with Bridge mode connection?

I am on a Debian upgraded from 7.11 to 8.5, so the xen package is upgraded from 4.1 to 4.4. I do not know much about networks, but when I see a diagram like this (taken from the Xen Networking wiki ...
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0answers
219 views

How to install Fedora on Xen with the LiveCD image?

I've managed to get the Fedora LiveCD image (Fedora-Live-Workstation-x86_64-21-5.iso) to boot in Xen using the following configuration: name = 'fedora_x86_64' memory = 1024 disk = [ 'file:/path/...
2
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1answer
1k views

Bridged networking problem with Xen 4.6 and Ubuntu 16.04

I'm trying to setup a Xen virtualization on Ubuntu 16.04, and Xen 4.6. My plan is to have 1 private network, as well as virtual servers with public IP addresses which should be accessible externally (...
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1answer
470 views

Xen + DRBD + Pacemaker on Centos7

So my current environment is centos7 on a pair of identical bare metal servers. I've installed drbd and carved up 3 x 100G block devices for DRBD to mirror. Then I installed a Centos7 image on one of ...
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1answer
553 views

Creating new SLES 12 VM on XenServer 6.5 fails

When I try to create a new SLES 12 VM on a XenServer 6.5 host it fails with this error message: "Failed","Starting VM 'AAEB-PUBLIC218LY' Internal error: xenopsd internal error: VM = 4d956449-...
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1answer
254 views

How to install CUDA on Linux Mint with Xen already installed?

Xen is installed on Linux mint. How to install CUDA without getting a black screen or command line on restart? In other words, how to get Xen's Dom0 Mint Desktop with CUDA installed?
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0answers
890 views

Virsh (libvirt-bin) is not able to communicate with Xen server

I have installed the latest version of Xen server 6.5. Now I want to connect to it with virsh (libvirt-bin). When I do this I get the error error:end of file while reading data: sh:nc:command not ...
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1answer
2k views

Qubes/Xen OS: access file manager for dom0

I hope somebody more experienced with Qubes specific terminal commands can help. If the KDE manager is installed, how does one open via terminal input the file manager for 'dom0'? To browse 'Home' ...
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0answers
122 views

xen + libvirt share disks betwee VM on diferent hosts

I have another problem. what I've done is: We deploy 2 physical hosts with SLES 12 SP1 and install XEN hypervizor on both. On each host we provide few block devices via FC. On each host we deploy ...
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1answer
169 views

Restore a disk from a snapshot in XEN 4.6

I created a snapshot with lvcreate -n snap01.vm01 -L 5G -s vg0/vm01.eclabs.de now I did some stuff on my disk i don't want to keep and want to revert it to the snapshot point. How do I restore the ...
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1answer
2k views

Networking problem with new Intel NUC

I recently got a new Intel NUC6i5SYH to replace my very old and not too powerful home server. I've installed XenServer 6.5.0 (as was on the old server) and plan to just copy over the VM's and other ...
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1answer
3k views

Install Xen 4.6 on Debian jessie

I need to install Xen with LVM on my dedicated root server. The current version Xen 4.4 in Debian jessie does not support the new Skylake intel processors. I tried Debian stretch, which has Xen 4.6 ...