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.

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Determining what type of virtualisation used on VPS/VDS? [duplicate]

I bought VPS/VDS and want to know what virtualization used. I have a root prompt in Debian Linux.
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How to upgrade Xen with minimal risk and downtime?

I've recently noticed that one of my server is running on a pretty old version of Xen: $ dpkg-query -l | grep xen ii libc6-xen 2.11.3-4 Embedded GNU C ...
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How to check what is the default NIC on a Xen guest?

A VM running on a Xen is getting buggy. Some VM lost their network connection sometimes. I've identified an error on the ping command: $ ping 8.8.8.8 PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data. ...
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Forward Port on Guest Operating system With Libvirt

I am currently running a Xen Hypervisor underneath Ubuntu 14.04. On the host machine I am running a guest VM. From what I understand, In order to be able to receive incoming connections on the ...
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How to diagnostic internet access failure on a linux system?

I have a VM running on Xen. The virtual machine was running fine for months and suddently the network access broke down. Dom0 DomU .-------. bridge ...
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Booting CentOS7 on Xen 3.1.6: upgrading Xen best path forward?

I'm running into problems booting CentOS 7 on Xen 3.1.6: Here is the error: [root@vh1 ~]# xm create vm-app-em5-test Using config file "/etc/xen/vm-app-em5-test". Traceback (most recent call last): ...
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How are the Debian/Ubuntu Xen netinstall images built?

Xen/XenServer has this nice feature where you can select a Debian or Ubuntu template and point it at some mirror and it will go and download a minimal kernel and initrd which will be used to bootstrap ...
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Using XenServer to host multiple VMs and use them from the same computer [on hold]

I'd like to run multiple virtual machines on my home computer and be able to switch between them easily. I could just have a windows host, and a number of guest VMs. However is it possible to have ...
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Checking for disk failures and issues in a VM

If you host with a provider who runs a RAID 10 or another RAID based system and your in a VM. Are you able to check for disk failures or RAID failures from within the VM or does it require host based ...
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Firefox will not open with Open VSwitch Installed [on hold]

I am following along with the Xen installation files from Ubuntu: https://help.ubuntu.com/community/Xen When I try to set up Open VSwitch, I noticed I permanently lose the ability to open Firefox ...
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How to get output 'xentop' or 'xm top' command in centOS

I would like to develop shell script by 'xmtop' or 'xm top' command get output in same format or just show on command line like, top -c, w .
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Xencenter system alert VMPR failed: snapshot could not be created

I am new in Citrix my previous administrator setup the Citrix. Last five days showing the same error System alert: "Production Daily: VMPR failed: snapshot could not be created","","AA","Jul 27, ...
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Routing issues with bonded VLAN trunk bridged to Xen dom0 on CentOS

I am setting up a new dom0 which has a LACP bond. Connectivity is fine between the network, dom0 and domU's without the trunk enabled. Once I start tagging traffic on the switch and add the ...
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7 views

KVM or Xen for VGA Pass-through [migrated]

I'm in the planning phase of setting up a personal virtualization server. One of the virtual machines I want to setup is a Windows box with Steam. Ideally, I want to stream higher-end games to my ...
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XEN Server NFS SR read only

We have two Boxes running XEN XCP. One SR is located on an FreeNAS 9 NFS share. For some reason the NFS share turned read only which is pretty bad for one VM whose VDIs are located on the NFS SR. I ...
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Is it possible to transfer OpenVZ VPS image to XEN platform?

I'm having a memory related issue with my vps on openvz platform and I guess that my hosting provider is overselling RAM. So, I'm thinking to move on a xen platform since ram cannot be oversold but I ...
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migrate xen server to new HDD

I have a Xen Server with multiple VMs that are mirrored with DRBD to a Backup Server, and it's running out of space. I want to migrate it to a bigger Harddisk, but I'm not sure about how to go about ...
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libvirt: can it provision network interfaces where the network backend is running in a domU rather than dom0?

Thanks to a great blog post, only slightly out of date [1] I've managed to configure a dom0 which has no networking at all: physical network interfaces are passed through to dedicated domU guests ...
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How to get Ipv4 in NAT mode & Ipv6 in bridge mode together in Xen 4.4?

Here is my problem with Xen 4.4 wth Debian 8, i have one Ipv4 address & plenty of Ipv6 addresses. I would like to setup xen for NAT to route IPv4 to a private network and bridge with Ipv6 ...
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17 views

Migration from kvm to xen [duplicate]

It is possible to migrate the instance from kvm to xen hypervisor, being migration from full virtualization to paravirtualization , is it possibile.
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Setting up emergency console access with xen

On Gandi (or other providers) you can activate an emergency console to your VM. It binds a SSH channel to a temporary IP and port. I have my own server running on xen. I would like to implement an ...
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xen nic passthrough to ubuntu domu

I have installed xen hypervisor 4.4 on ubuntu 14.04 and performed NIC passthrough to PV domu. The config of domU: /etc/xen/dom1.cfg name = 'dom1 Ubuntu v14.04.2 LTS' vcpus = '1' memory = '1024' ...
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Linux Redhat 6.0 booting freezed at “starting RHM Managed Xen Domains”

One of our Linux redhat 6.0, 64 bit machines freezes **after the step of "starting RHM Managed Xen Domains"** during booting. It has been staying there for days without successful booting. ...
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20 views

Openvswitch/Xen VLAN connectivity

I`m looking for help with Openvswitch... In a Xen virtualized environment I have VMs(both Linux and Windows) set up on different VLANs and between 2 VLANs I need to set up inter-VLAN conmmunication. ...
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84 views

Switching back to libxl from xend without rebooting

I did something dumb: I enabled xend over libxl and started an instance with xend. Now, libxl won't start any instances, even though I got rid of all the xend instances and stopped xend: root@xen1 ...
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OpenSUSE Xen Multiple Apache VM's

I am attempting to set up an OpenSUSE 13.2 server with Xen Hypervisor installed. The problem I have now encountered, is how do I route the correct requests to the correct VM instances. Lets say I ...
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Load for Xen units

I'm looking for a way to check load for Xen units on a xen Node run by Solusvm. I know OpenVZ can show container load in the solusvm panel. But if I go to load in svm for the Xen Node the load page is ...
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82 views

Convert Physical Machine to Xenserver

I am planning to convert all my physicals machines into Xen virtual machines. But i can't find any documenation on that? is it just to make a image file and convert it to a vdi ? I may have to ...
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Xen hypervisor component/plugin development [closed]

I am new to virtualization as a concept, and am particularly interested in Xen. A machine is a complex system composed of many parts/constituents: CPUs (one or more) RAM Hard drive Network card ...
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76 views

Why do I not get a console for my CentOS6 PV DomU on CentOS6XEN4 Dom0?

I am currently in the process of migrating from SLES11 SP3 as Dom0 - running the "old" xend/xm-stack to CentOS6 XEN4 running the "new" xl-stack. I stumbled across a strange problem: After pygrub ...
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How can I best secure NFS between an Xen host on Debian and VMs?

After some research, it seems that the best way to share files between my Debian Xen host and the virtual machines on it is to use NFS. How can I secure NFS so that only the specified VM can access ...
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What is the xsave cpu feature? [duplicate]

Recently after updating to xen v4.5 I lost my ability to boot my hypervisor. It would restart after saying "scrubbing free ram." After some frustrating trial & error I traced the problem to the ...
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Multi IPs on a Xen VM with bridging

While I am fairly new to XEN (running under Ubuntu 14.04) I've not had any real issues until now. I have set my networking using bridging and that has worked well for many different machines until ...
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XEN - Does pygrub alter grub on dom0

I apologize for question but I did not really understand the idea behind pygrub. I've downloaded VM from stacklet.com. The image is shipped as a ext4 file and pygrub config. My question is if I can ...
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Running OpenVPN on Xen node causes guest VM to view all inbound connections as originating from the node IP

I have two node servers running Xen 4.2 -- I'll call them Node A and Node B. Node A is running OpenVPN as the server. Node B is running OpenVPN as the client. Both nodes host a number of Xen guest ...
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Xen: network between dom0 and domU does not working, while network between particular domUs does

I am unable to establish communication between domU and dom0. I have two domUs and they are able communicate between each other. Dom0 is connected to Internet. I just need network between dom0 and ...
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103 views

How to configure mkinitfs for stateless alpine linux / xen DOM0 boot?

I am working on setting up a test bed for some Xen development. I have a development server where I can create new builds of xen and push them to the tftp server to be PXE booted on some test ...
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Defunct process Rev1112

We were having the following output in top on a Debian box on XenServer: top - 10:00:55 up 10 days, 24 min, 5 users, load average: 126.79, 128.96, 71.39 Tasks: 10382 total, 1 running, 4801 ...
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convert SLES11 SP1 vmlinuz-3.0.13-0.27-xen to VMware using vmware converter

I am looking to convert a XEN VM (SLES11 SP1 kernel vmlinuz-3.0.13-0.27-xen) to a VMware guest using the VMware converter tool. The VMware tool tell me conversion went fine. 100% OK, however, when I ...
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81 views

XEN Guest error cannot open display

[XEN - dom0] Ubuntu 12.04.5 server x64bit , using it on CLI Mode - no GUI installed [domU - guest] HVM guest created via configuration file, I Determine the started DomU port attached with : # xm ...
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xen vm memory missing

I have an Ubuntu server with 320GB of memory. I installed xen 4.4.1 on this machine, and run 2 Debian VMs. One with +-100GB of memory and one with +-200GB. Everything worked fine, until at one point, ...
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Xen VM won't come up: could not find bridge device xenbr0 (configured to use routed)

I am using xen 4.4.1 on an Ubuntu 14.04 server, my DomU is running Ubuntu 14.04 Server as well. I've run this DomU in bridge-mode previously no problems. However I want to switch to a routed setup. I ...
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Can I use kernel modules on Amazon HVM/PV instances?

It's a perfectly stupid idea, I know. But I want to test one of my older projects, which includes kernel module (Netfilter extension) on a virtualized cloud-y instance. Will it be possible for me to ...
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336 views

failed to run bootloader: -3 on create with xl

I have a Ubuntu 14.04 migrated from Virtual Box Have 3 partitions. I've updated the /etc/fstab for recognize the new partitions and chrooted for update the grub I'm using the following ubuntu.cfg ...
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xen gentoo domU (Ubuntu 14.04 LTS dom0)

I have a few Ubuntu 14.04 LTS Xen 4.4 servers and I would like to add Gentoo guests. However I am not sure how to do that. Does anyone know where I can review some examples? Also does it have to be ...
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bash: convert date from to unix timestamp changes timestamp

Running the following command at the xen-servers (either DOM0 or DOMU) at $company gives me a negativ number, on every other system zero (0) (even in my cygwin). date -d "1970-01-01T00:00:00" "+%s" ...
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Random XEN guests do not boot complaining disk not found

Performed the latest Citrix XEN Server 6.2 updates, skipping anything related to 6.5. Everything seemed normal after fixing GrubConf.py except that a few random Windows Servers would not start. ...
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XenServer: run management and data over same LACP bond

I have a XenServer (open source version 6.5) machine with 6 available ethernet interfaces. Is there a way to create one single LACP bond with all interfaces and then run the management network as ...
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40 views

Assigning a public IP to a Xen Guest machine

On my CentOS server (dom0) I have 4 Ip addresses: eth1 - 56.x.x.100 eth1:1 - 56.x.x.101 eth1:2 - 56.x.x.102 eth1:3 - 56.x.x.103 How can I map eth1:1 (etc) to one of my guest machine? Currently ...
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Xen server on hetzner with two public up and local virtual network

I use Xen server on my office with a Dell t310 with only one public ip. The public ip is assigned to the router that forward ports to a guestos running endian firewall that route traffic to an apache ...