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.

learn more… | top users | synonyms

0
votes
0answers
57 views

Verifying VT-D / IOMMU Support (VGA Passthrough)

I have a 4790K I'd like to use VT-D with for hardware acceleration in a Windows guest VM (Dom0 = Ubuntu 14.04) using Xen. Intel's website CLAIMS the processor supports this: "Intel® Virtualization ...
0
votes
0answers
16 views

Setting up bridge for domU to be accessed from external network(internet)

I am trying to setup virtual guests(PV) using xen 4.4 (xen-tools) on debian 8.3. Problem is that I fail to configure bridge properly I guess ^^. I have setup an interface xenbr0 that uses same IP ad ...
0
votes
0answers
68 views

Xen VGA passthrough w/ XEN_PCIDEV_BACKEND kernel option

Xen's webpage ( http://wiki.xenproject.org/wiki/Xen_VGA_Passthrough ) says this is a requirement for VGA passtrough: "dom0 Linux kernel needs "XEN_PCIDEV_BACKEND" option enabled." I'm running ...
0
votes
1answer
40 views

Xen domain windows 2012 r2 - cant add usb

I have xen 4.4.3-9.el6 on CentOS: 6.7 (Final) Problem is I cant add usb devices to my windows 2012R2 domain; If I usexm usb-add demo_win2012_r2 host:0529:0620: I can see my device in windows but it ...
1
vote
1answer
245 views

Running a Linux docker container inside a Windows Server provisioned through Xen on CentOS (Can it be done?)

How do you properly propagate VT-X through physical hardware into a server provisioned via Xen so that virtualized docker can be run inside the virtual Windows server? L0 is Xen running inside ...
0
votes
2answers
621 views

Need informations about RAID5 behaviour in XenServer 5.5

I've detected an I/O error in my partition /dev/sdd3 which is a part of 4 devices assembled with RAID5. Now my server is in degraded mode with only 3/4 sync drives. I have a boot partition ...
2
votes
1answer
1k views

xen Dom0 network setup on ubuntu 12.04.1 LTS

I read a lot of tutorials (or at least try to be) but none is able to explain well how to configure networks for xen host. my Dom0 has two interfaces eth0 (real interfaces) and virbr0 (I guess was ...
2
votes
1answer
78 views

Handling /etc/fstab when upgrading linode from Xen to KVM

I have a linode that is currently on one of Linode's Xen servers. I see that I am eligible to upgrade to a KVM linode. One thing that concerns me is that Linode's upgrade guide says block devices ...
3
votes
0answers
70 views

Xen networking - dom0 receives ARP requests but no reachability

Both dom0 and domU are Debian 8. Dom0 network configuration is: auto xenbr0 iface xenbr0 inet manual bridge_ports eth1 bridge_stp off bridge_waitport 0 bridge_fd 0 auto xenbr0.4 ...
1
vote
2answers
2k views

Xen: 'this operation could not be performed' (VDI is in use) error?

How do I resolve the error: This operation could not be performed because a VDI is in use by some other operation I see this when trying to (re)start a stopped VM.
1
vote
1answer
301 views

How do I increase the swap size on a xen guest machine using xm?

I'm attempting to increase the amount of swap on a xen guest machine. At first I thought it'd be similar to increasing the hard drive space, which I do like this: cd /srv/xen/domains/$host/ xm ...
1
vote
0answers
43 views

XEN VPS wrong memory?

I ordered a VPS on XEN platform with 1 GB of memory. CentOS 6.6 uname -a Linux vps 2.6.32-504.23.4.el6.x86_64 #1 SMP Tue Jun 9 20:57:37 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux I checked the ...
0
votes
1answer
23 views

XenServer - Removing Blade Server from Chassis

I've got to remove one of our PowerEdge M620 blade servers from our M1000e Chassis server to look at the hardware on the server, mainly the mezzanine card installed. Will removing the blade server ...
0
votes
0answers
80 views

Unable to get a xen vnc console on centos7

On a xen Centos 7 domU, I am unable to get a vnc console on xvc0. According to the documentation I have seen, this should occur automatically. What I see is anything but - console stays on hvc0. ...
0
votes
0answers
182 views

Getting “Too many slots” messages on CentOS 7 running as a domU

I have some CentOS 7 guests (domU) running on some CentOS 5 + Xen 3.0 hosts (dom0). I'm seeing a lot of this in dmesg and /var/log/messages: Dec 11 13:33:50 appsrv01 kernel: net eth1: Too many ...
0
votes
1answer
38 views

OpenSUSE Xen installlation is not in Grub 2

I'm sorry if this is a duplicate but somehow serverfault search action didn't work with my browser. I have a functional recent OpenSUSE Tumbleweed installation and I want to turn it into a ...
0
votes
0answers
48 views

Manage KVM and or XEN Server from Windows

I cant seem to find a way to mange my KVM and XEN Server from a Windows machine. Is there really no way except a remote desktop connection?
0
votes
0answers
15 views

Xen Vcpus State

hprvsr1 ~ # xl list Name ID Mem VCPUs State Time(s) Domain-0 0 1024 1 r----- 15.6 hprvsr1 ~ # xl ...
1
vote
0answers
25 views

How can I track security issues with running kernel under paravirtualisation?

I've got a bunch of client's virtual machines running by various providers who use Xen paravirtualisation. Almost all of these are Debian or Debian based systems. I rely on APT pretty heavily to ...
1
vote
1answer
79 views

Enabling Nesting for Xen-in-Xen via Libvirt xml

I'm trying to get nested Xen-In-Xen via libvirt. Can someone confirm that adding hap and nestedhvm to the features element in the domU xml config is what is required to get nesting working? Am I ...
0
votes
1answer
169 views

Rate Limit Xen DomU Network Traffic

Is there a solid way to rate limit Xen DomU Network I/O Traffic? I found an answer on here using tc but I get this error: Object "qdisk" is unknown, try "tc help". I guess a solution to either of ...
0
votes
0answers
15 views

KVM vs XEN PV - which might have higher Server Load [duplicate]

I am wondering KVM vs XEN PV which will create higher server load (From Host perspective). In simple words, if identical VM's ( Linux variant) runs on a KVM based node and XEN PV based node which ...
0
votes
3answers
2k views

XenServer Guest PV - Serial Port RS232

Is there any way how to forward (passthrough) physical serial port to XenGuest PV system? I need to be able configure serial device with virtual server on XenServer 6.2. I’m looking for some like ...
0
votes
1answer
131 views

Enable SNMP XenServer 6.5

I want to enable snmp on my servers running xenserver 6.5. I've found a few articles with instructions to do so and the whole process seems pretty straight forward but my question is this - is there ...
2
votes
3answers
2k views

xen server 6.2: lost a VM when moving?

I have three servers in a HA group (Xen 6.2). I've been doing some firmware updates which require rebooting so I've been shuffling VMs around to minimize disruption. One of the VMs seems to have ...
1
vote
1answer
104 views

Backing up Xen Guests from dom0 with disk image file

I have a Xen server dom0 with a number of guests installed and am struggling to find an easy way to manage backups from the dom0 side. Guest scripts: Of course I could run backup scripts on each of ...
0
votes
0answers
22 views

Shared storage for Xen based cluster that allows I/O control

I am looking for a solution that will allow me to control I/O usage for my home Xen based cluster. Basically what I need is a way to limit or scale domUs (VMs) disk throughput. E.g. setup: - VM1 ...
0
votes
1answer
27 views

Effects of Third Party tools on Hypervisor Performance

I am using XEN for managing and introspection of VM's. I used DRAKVUF for sake of introspection. XEN provide built in tools for managing VM's. But I want to use LibVIRT for management. I want to know ...
0
votes
0answers
11 views

Get direct block addresses - Sleuth kit - XEN

I am using sleuth kit library in order to write an introspection tool for XEN hypervisor and my question is if we have the inode number of a file on a disk [ guest VM - ext4 filesystem], for example ...
0
votes
0answers
97 views

Ubuntu LDAP and NFS directory permissions

I have an issue with NFS and directory permissions using LDAP. Users that are members of a certain group cannot access a directory owned by that group (it works fine without NFS). They can access ...
1
vote
3answers
2k views

iptables rule to block incoming/outgoing traffic to a Xen container

I'm trying to setup IPTABLES on my xen host server that will block incoming and/or outgoing access to a xen client on the same machine. Specifically, I need to block outgoing port 25 traffic and ...
0
votes
0answers
10 views

Citrix Xenserver Service Account Issues

I'm trying to create an account with citrix xenserver so I can post questions on their boards and also get notifications for updates. I filled out the necessary info and I get an email saying an ...
0
votes
1answer
164 views

How to create bridged network interface for Xen?

I'm trying to use Xen on an Ubuntu server for the first time and have a really basic question. I'm following the guide in the Ubuntu docs and under the Network Configuration->Using bridge-utils ...
2
votes
2answers
62 views

wget only works when tcpdump is listening

I am running two Virtual Machines over the XEN hypervisor both with Ubuntu trusty (Linaro-Developer version) with the following simple bridge networking setup: Backend domain (dom0): br0 ...
1
vote
1answer
37 views

nat and xen, nat only to external ip

I've setup xen that way that all my vm's have a public ip and a private ip (192.168.0.x). However, those vms which don't have a puplic ip should also get internet access so I did setup nat. iptables ...
0
votes
0answers
36 views

Apply Hotfix/Update in Xen Center

I noticed that hotfix XS65ESP1013 was just issues for xenserver 6.5. I want to apply the update through Xen Center, NOT CLI. What are the proper steps for updating through xen center? I currently ...
0
votes
0answers
53 views

xen-hypervisor-4.4 doesn't show log timestamps

I'm trying to debug some performance problems with a recently updated xen (from 3 to 4.4) and I realized that with the old XEND toolstack I had a log file in var/log/xen/xend.log with timestamps and ...
0
votes
1answer
57 views

Persist OVS mirroring on Xen reboot

I'm running Xen on Debian with five guest VM:s. I've used the following command to setup port mirroring to two of the VM:s ovs-vsctl \ -- --id=@m1 create mirror name=detector \ -- add bridge ...
2
votes
1answer
74 views

“soft lockup - CPU# 0 stuck for ” after xen install on Ubuntu Server

I finally managed to install xen-hypervisor-amd64 on an Ubuntu 15.04 Server and I rebooted fine, but after a few minutes after a restart, the console starts outputting these messages soft lockup - ...
2
votes
0answers
15 views

What is the value shown for memory graph in XenCenter?

I would like to ask question to people in this community about Xen Center. I use Xen 6.5 in production environment. However, I quite don't understand the value shown in memory graph of "Performance" ...
0
votes
0answers
38 views

xe vm-disk-list >Error Multiple matches VMs found

Dell equallogic on XEN_VERSION='4.1.3' storage size 2tb usage 96% toal virt. alloc. 500gb there is only one snap shot for each vm I dont know who consumed the space? xe vm-disk-list >Error ...
2
votes
1answer
765 views

Why is LVS dropping packets?

I am currently trying to get down to the core of a problem where my LVS-director seems to drop a packet coming from a client from time to time. We have this problem on our production systems and can ...
1
vote
1answer
7k views

Citrix Xen VM's lose networking

My client has a XenServer 6.0.2 installation with 2 Window Server 2008 R2 virtual machines. Whenever the virtual machines are rebooted they lose their IP settings (IP address, subnet, gateway). Each ...
0
votes
0answers
102 views

How to backup Xen virtual machine using XL toolstack?

My server is running several virtual machines using Xen with XL toolstack. Each virtual machine uses an image file as a disk device. If I just copy these image files, there is a high possibility of ...
0
votes
0answers
56 views

Xen bridge - block traffic from port range - iptables / ebtables

I use Xen with bridge interface : - eth0 - viifbr0 - Name of VM interface : vifv10XX.0 Do you know if it is possible to block output traffic from source port range for a domU please ? If yes, can ...
0
votes
0answers
51 views

Xenserver networking in VirtualBox not working for DomU

I am trying to understand if/how unikernels work, using HaLVM and MirageOS and in order to experiment with those tools I have setup a XenServer virtual machine inside a VirtualBox on my Mac. ...
0
votes
2answers
699 views

xenserver - xe-toolstack restart - i lost connection from xencenter

After Xencenter-toolstack restart i lost connection from xencenter I try to restart using ssh - putty following message is showing and i lost the browser access also ............ All xe ...
1
vote
4answers
150 views

Xen - reduce resources/hardware limitation?

After I chose a Xen VPS provider, they said me that Xen doesn't let them downgrade resources/hardware so, because of this I can't downgrade my plan. I think that this limitation is strange... Can you ...
4
votes
3answers
5k views

How can I obtain a new XenServer license using only the command line?

Many sites explain how to renew the license using XenCenter. Is there a way to do this directly from the console?
0
votes
1answer
133 views

Xenserver 6.5 High Availability

I'm running xenserver 6.5 and I just configured high availability. I noticed that there is the option for start order. Is there a best practice for start order when it comes to HA? Obviously the more ...