Last call to make your voice heard! Our 2022 Developer Survey closes in less than a week. Take survey.

Questions tagged [xen]

Xen is a hypervisor based virtualization. It supports x86, AMD64, IA64, ARM and other CPU types, and Linux, Windows, Solaris and *BSD guest operating systems.

Filter by
Sorted by
Tagged with
4 votes
0 answers
42 views

Finding mystery Linux memory usage - not caches or slab (or ballooning?)

I have a Xen VM running Debian Linux with a weirdly large amount of RAM used. What might be the culprit? I believe I've ruled out the usual suspects of disk caching, kernel slab usage, and memory ...
user avatar
  • 2,996
1 vote
1 answer
39 views

How "real" is the POSIX clock in a virtual machine?

Introduction: Time is OS like Linux is typically derived from a clock chip (RTC), or maintained by software using either periodic interrupts or some hardware registers (e.g. CPU's TSC cycle counter) ...
user avatar
  • 264
0 votes
0 answers
8 views

Which Xen PVM properties are copied for live-migration?

I wonder (after another failing live migration): Which VM attributes (properties) are copied from source to destination when a live migration of a PVM is being performed? In our case the libvirt ...
user avatar
  • 264
0 votes
1 answer
26 views

Install Ubuntu 20 PV guest on a Debian 10 Xen

Struggling to find a guide to do this. I've understood that xen-tools supports installing Ubuntu guests on Debian so that should be a fast and easy way but can't find any examples. Anybody knows a ...
user avatar
0 votes
0 answers
28 views

Xen hypervisor: What does the acronym RMRR mean in "(XEN) [VT-D] It's risky to assign" ... "with shared RMRR at"? What are the risks?

I'm running Qubes-OS 4.1.0 While looking through the /var/log/xen/console/hypervisor.log I stumbled over the following messages: ... (XEN) [VT-D] It's risky to assign 0000:00:14.0 with shared RMRR at ...
user avatar
  • 609
0 votes
0 answers
26 views

2012 R2 rebooting with no events related, VSS?

I have a production 2012R2 virtualized server (previously Xenserver, migrated to xcp-ng, 8.0 currently) that has been running fine for 4 years. Recently, the system tried to update Xen drivers and it ...
user avatar
  • 475
1 vote
0 answers
18 views

There is a way to pass the option " pci=[’00:...,rdm_policy=relaxed’] " to libvirt?

I can run (successfully) a xen virtual machine use the classical method with xl xl create -f myvm.xenxl.cfg I know also how to convert from xl format to libvirt xml virsh -c xen:///system domxml-from-...
user avatar
  • 322
0 votes
0 answers
126 views

How to run xen hypervisor on a computer that only supports UEFI?

I have tried updating the bios, disabling hyperthreading, adding xen.efi to its proper location within Ubuntu, building xen from source, etc. Yet I cannot get past the following error a Xen panic ...
user avatar
0 votes
0 answers
56 views

How to run Xen with UEFI?

I'm trying to configure Xen so that it runs with UEFI. However instructions I have found online are not clear or outdated. Can anyone provide clear instructions that explain step-by-step of how to ...
user avatar
0 votes
0 answers
106 views

XenCenter 7.0 VM import failing "This file could not be imported"

Totally and completely new to XenServer. We have XenCenter 7.0 on a Windows machine that I am trying to import an .xva file to. The file is aout 8GB. When I import the xva it seems to chug along until ...
user avatar
  • 1
0 votes
0 answers
33 views

xen bridge down following reconnect

My xen bridge was working fine before a USB/SATA cable got moved. None of my xen clients can ping the www. root@NewInspiron15:/etc/xen# xl list Name ID Mem ...
user avatar
  • 123
1 vote
0 answers
48 views

Xen xl console terminates upon reboot command

I am trying to troubleshoot the boot issue of Xen virtual guest and I need to access the grub menu. I have attached a console to guest with xl console and in other terminal I have executed a command ...
user avatar
1 vote
1 answer
165 views

Xen VM continuously restarts and kernel fails to start init

I am using a VM built using the Xen hypervisor and libvirt management layer. I couldn't connect to the VM after updating the Debian verison from 8 to 9 so I tried logging into the physical machine the ...
user avatar
  • 111
0 votes
1 answer
38 views

Workstation virtualization on workstation host

Problem exposition I am a system administrator in our company, and I am currently researching a possible solution for more stable workflow in a our company. Our company is a chain of hundreds general ...
user avatar
23 votes
2 answers
5k views

Is it safe to mount the same partition to multiple VMs?

I'm using ubuntu 20.04 with Xen Hypervisor. On my machine I have an SSD that hosts my VM images, and then four sata drives which I have data on. My current set up is to mount the data on my domain0 ...
user avatar
  • 343
0 votes
1 answer
99 views

Xen Domain0 Has Network But DomainU does not

After re-installing my domain 0, a guest VM (domain U) is no longer able to connect to the network. I am using Ubuntu 20.4 on my Domain 0 with Xen 4.11. I am able to successfully connect to internet ...
user avatar
  • 343
1 vote
0 answers
459 views

Dead Citrix XenServer with LVM: How to get the VHDs off the system?

My company recently delegated the task of recovering a fairly old (~2015) Citrix Xenserver to me. The machine had a major electrical fault which caused a hard drive failure and a collapse of the RAID. ...
user avatar
1 vote
2 answers
67 views

Tool to maintain IBM x3650 - get info from faulty HW

I am have a server IBM x3650 M4 running XenServer and Windows guest. The server have a problem with harddrive, yellow exclamation mark blinking. I am able to turn off the server go to BIOS and get ...
user avatar
0 votes
0 answers
197 views

Why can't I boot xen hypervisor on Ubuntu 20.04.1? panic on cpu 0 timer doesn't work

As the subject says I simply cannot boot into the hypervisor. I'm able to install it just fine though, it says something about the CPU when I try to boot and quickly just reboots. I have ...
user avatar
1 vote
0 answers
513 views

xen VM boot logs - how to locate

Working with a VM that starts to boot and then promptly shuts down. Hoping to locate VM boot logs on Xen host but not sure where to look. Examining /var/log/* doesn't show anything obvious. ...
user avatar
  • 2,297
1 vote
1 answer
534 views

How do I manage xen-hypervisor using virt-manager client?

I've installed xen-hypervisor 4.11 on my debian 10 desktop. But, when I add xen connection to my virt-manager it shows this error. Unable to connect to libvirt xen:///. Failed to connect socket to '/...
user avatar
1 vote
1 answer
274 views

Resizing Ubuntu Server partitions in a Xen environment

I need to increase an Ubuntu partition, in a Xen environment. Through XenCenter, I increased the disk, from 10GB to 100 GB. Now I can see "xvda" size 100 GB. For reasons I don't know, in ...
user avatar
1 vote
0 answers
595 views

Failed to connect socket to 'var/run/libvirt/virtxend-sock': file or directory not found

I want to boot a physical installation of windows 10,so I need to run xen HVM version. Do u have a tutorial that I can follow ? I'm trying to create a new connection inside virt-manager,with xen,on ...
user avatar
  • 143
1 vote
1 answer
53 views

XenServer (Citrix) Management Network Interruption

We have an OOB/management network we use to loginto storage, hosts etc. We're using VLANs to separate out storage, from hosts, to camera's etc. We would like to replace this switch with a new one ...
user avatar
1 vote
1 answer
2k views

How to get (Citrix/Xen) 'xe' tool on CentOS 7

I have an Xen 7.6 cluster and I need to update the patches. Where do I get the 'xe' application from (for CentOS 7)? I see references to the 'guest-tools' that get installed to manage new VMs but this ...
user avatar
  • 2,297
0 votes
0 answers
76 views

GPU Passthrough on Xen Hypervisor

I have a Dell PowerEdge r710 running the Xen hypervisor and I want to get a decent graphics card for a virtual machine. I plan on doing GPU passthrough to dedicate the entire GPU to the virtual ...
user avatar
0 votes
1 answer
1k views

Compatible AMD GPU for the Dell PowerEdge r710 [closed]

I'm a complete noob when it comes to server virtualization and GPUs, so please bear with me. Are there any decent AMD GPUs that are easily compatible with the Dell PowerEdge r710? I'm looking for ...
user avatar
1 vote
2 answers
334 views

Booting an older kernel in Xen DomU when using pvgrub in Dom0

I'm having issues with the lastest kernel update in a Debian Jessie DomU, and want to boot it using a previous kernel. Dom0 is also running Debian Jessie, and is booting the DomU via PvGrub. I'm ...
user avatar
  • 73
0 votes
2 answers
571 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 ...
user avatar
  • 1
4 votes
0 answers
152 views

How can I stop Freenas from assigning two disks from different SATA controllers the same device number?

I have Freenas running in a VM in XCP-NG. I've followed the guides and I've dedicated a SATA controller to it using PCI-passthrough. Freenas correctly discovers its boot disk, which is virtual, and ...
user avatar
  • 141
0 votes
1 answer
471 views

Issues with vif-nat and Xen after upgrading from Debian 8 to 10

I'm getting this error when running xl create: # xl create ../vm-www.rootspirit.com.cfg Parsing config from ../vm-www.rootspirit.com.cfg libxl: error: libxl_exec.c:118:libxl_report_child_exitstatus: /...
user avatar
  • 1,435
2 votes
1 answer
260 views

XenServer 8.0 running a NTP client in guest PVHVM VM

I would like to run a NTP client in a Xen Linux VM under XenServer (XCP-NG 8.0 to be precise). The Linux VM, Debian Stretch 9.9 (uname -a: Linux debian 4.9.0-9 amd64 #1 SMP Debian 4.9.168-1+deb9u4 (...
user avatar
  • 208
0 votes
1 answer
154 views

Is PCIe passthrough on Citrix Xen Hypervisor persistent?

I am virtualising my firewall, NAS and other services to reduce hardware diversity. Specifically I want to run at least PfSense and OpenMediaVault over Citrix Hypervisor (v8 at the time of writing). ...
user avatar
0 votes
1 answer
1k views

Cannot Connect to XenServer from XenCenter

Setup; - XenCenter (running on a Windows PC) - XenServer (installed via APT on Ubuntu 18.04 using the command, sudo apt-get install xen-hypervisor-4.9-amd64 I can SSH into the server fine. ...
user avatar
0 votes
1 answer
244 views

xenserver-iso: Error downloading: open : no such file or directory

I'm trying to build a "vdi_vhd" image using packer on xenserver,but i have got the below error, could you please anyone help me on this,Thanks in advance. [root@localhost bin]# packer build /usr/...
user avatar
6 votes
1 answer
311 views

Storage Setup for iSCSI/NFS servers

We are preparing to replace our storage servers (iSCSI+NFS). The current servers are Debian Wheezy using mdadm+lvm2 for storage, and failover using drbd and heartbeat (never got heartbeat to work). ...
user avatar
  • 61
1 vote
0 answers
171 views

Migrate From Xen LVM to Citrix Xen

I need to migrate some production vm's from Xen 4.2 to Citrix Xen 7.1. I have very little experience with Xen. The VM disks are LVM, see below info. One possible solution might be to do the following ...
user avatar
0 votes
0 answers
80 views

Installation of virt-manager while yum update and yum install rhvm does not work

I have downloaded RHEV-H 4.2 https://access.redhat.com/products/red-hat-virtualization#getstarted (RHVirtualization 4.2 Host and Manager iso). I uploaded the image and installed on an HP G9 server ...
user avatar
0 votes
1 answer
166 views

Xen automatic dom0 IP assignment on a SSPN (Single-Server Private Network)

I'm currently using XCP-ng 7.6.3, and wanting to add a little security and take advantage of traffic shaping, I decided to PCI pass-through the NICs. In order to be able to reach the dom0, I created a ...
user avatar
  • 101
0 votes
0 answers
368 views

Edited guest xml with 'virsh edit' to add ttyS0 but ttyS0 is not added

I am facing the errors in /var/log/messages like: Feb 19 20:19:42 guest-dp init: serial (ttyS0) main process (608881) terminated with status 1 Feb 19 20:19:42 guest-dp init: serial (ttyS0) main ...
user avatar
1 vote
1 answer
1k views

Getting errors when try to start Debian XEN HVM VM with more than 4 vif's

I've been trying to set up a PfSense firewall on my Debian XEN server for some time now, this works fine until I try to add a fifth (with four it works) interface to the "hvm" VM, then the VM won't ...
user avatar
1 vote
0 answers
137 views

Performance issue with debian guests on xenserver with iscsi storage

I am facing a performance issue with my small virtualization environnment. I have two Dell PowerEdge 2950 and a Qnap TS-453-BU. The Dells are equipped with XenServer 6.5.0 and they are attached to an ...
user avatar
0 votes
1 answer
380 views

Storing Xenserver VM Snapshot UUID as a variable in a shell script to create .xva files from snapshots

I was looking at this question which was asking something sort of similar for help and is the closest thing I could find to helping, but it doesn't solve my issue: export XenServer snapshot as file ...
user avatar
0 votes
1 answer
881 views

LVM snapshot gets created in a dirty state and cannot be mounted in XEN

I have a server which runs Xen 4.9.2 with Linux Ubuntu 18.04.2 installed in Dom0. There is one virtual machine (DomU) with Linux Ubuntu 12.04.5 that uses LVM logical volume as its root filesystem. ...
user avatar
0 votes
2 answers
787 views

How to find out RAM speed and L2 L3 cahce sizes of AWS EC2 & lightsail instances

On my desktop $ sudo lshw -short -C memory H/W path Device Class Description ======================================================== /0/0 memory ...
user avatar
1 vote
1 answer
552 views

Partially working network bridging - Ping works but services can't connect

So, here's the setup - I have a network with a Xen host on it. The Xen host is configured to bridge between the physical network and hosted VMs. i.e. [Network] <-----> [Xen DomO / Bridge] <----...
user avatar
0 votes
1 answer
364 views

Fedora - Configuring as a Xen Host (EFI preferable)

I've got a new Fedora box that I'm setting up as a Xen host (Dom0), which is proving a little more difficult than expected. First stop - install Xen via DNF and reboot. Find that the Xen boot option ...
user avatar
4 votes
1 answer
975 views

VM transfer speed between XCP-ng (XEN) servers

I have two HP DL380 G8 servers with 4x 1TB on HP p420 RAID controllers in RAID 1+0 setup. Eth0s are connected to the router, and Eth3&Eth4s are bonded (LACP) and connected directly between ...
user avatar
1 vote
1 answer
219 views

How to fix SolusVM Xen-Hvm template error at creation?

The following log contains an error which happens while executing the template creation script on a SolusVM powered CentOS 6 server. CREATING MBR IMAGE... 1+0 records in 1+0 records out 512 bytes (...
user avatar
0 votes
0 answers
187 views

How to connect to dom0 console from a trusted domU?

Is there a way to connect from a trusted domU to dom0 via console? I'd imagine I need to install some Xen tooling to do this; but, which tools? And, is there some permissions/firewall I need to ...
user avatar

1
2 3 4 5
23