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.
1,146
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Multiple VMs mounting and writing on the same partition
I have multiple VMs ( XEN domains ) which are getting data and writing it on a directory in a ext4 partition. Is this going to introduce data loss or corruption?
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Allocated Memory difference in xen guests with Linux 2.6.18 and 2.6.32
Can some one explain me why there is difference in available memory on Guests with same configuration:
Hypervisor:xen 4.2 64 bit
VM1: Centos 5.7 with 2.6.18-274.el5xen,
Assigned memory from xen is ...
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Obtain the free_memory value in xen
I would like to know if there's an alternative to the command I am currently using to get the real free memory for the system (meaning memory that can be assigned to new domU)
xm info | grep ...
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1
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Enable promiscuous mode on Libvirt vif
Does anyone know how to enable promiscuous mode on a libvirt vif?
I have a bridge with 3 vifs connected to it. I need one of these vifs to be able to sniff all the traffic flowing through the bridge.
...
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2
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How do I configure Xen's virtualization of interfaces (eth0 to peth0)?
I installed Xen a while ago but had not yet booted up with the hypervisor. Well I did yesterday and all hell broke loose. I completely lost internet connectivity on my server because of Xen.
When I ...
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2
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IPv6: ADDRCONF(NETDEV_UP): eth2: link is not ready & IPv6: ADDRCONF(NETDEV_UP): xenbr2: link is not ready on Ubuntu Server - Xen bridge
Hi all,
I am having some problems getting a Xen bridge up in Ubuntu precise with Xen.
I created a first bridge on eth1 with no problems, but the exact same process for eth2 yields the following ...
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2
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967
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How create partitions with custom layout in VM on Xen Server?
We use XenServer with RAID 0, as one disk only (I wonder if this is a good approach, if not what would be ?), then we install Xen. After that we put the centOS 6.4 x64 DVD in the server and try to ...
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1
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652
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xen + debian network after upgrade squeeze to wheeze
I've got a Debian + Xen server.
After a system upgrade to the stable version the network doesn't come up after boot. Every time after reboot I need to bring it up manually. The network configuration ...
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1
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XenCenter can't connect to XCP server after restart
After restarting a XCP 1.6.10 host machine, XenCenter 6.1 is no longer able to connect to it. The failure message is always "Server failure: Unauthorized". Using ssh with the exact same root ...
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2
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Xen Networking - Separating Dom0 from DomU
I'm having some issues regarding Xen Networking and I was wondering if you could point me in the right direction.
I have a server with 2 NICS (Xen over Ubuntu Server - Xen Bridge scripts)
Each NIC ...
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Xen dom0 and domu ifconfig returns different stats
I expected that when I use ifconfig command to display network traffic RX and TX values both for dom0 and domu machine,
there are differences.
I run once ping inside the domu.
domu ifconfig command ...
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answer
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Network filtering with libvirt + xen + bridge + nat?
How can I properly add basic network filters (clean-traffic or, at least, ip-spoofing prevention) to XEN (xend) guests managed by libvirt?
Or, in particular, can I manually execute libvirt's ...
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1
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After running for approx. 2 days, IIS FTP refuses to connect
Background:
Windows Server 2008 R2 64 bit, running inside Xen 6.1.
Updated to the latest Xen Citrix Tools for Windows.
Disabled IPv6.
Currently trying to resolve the following:
IIS FTP server works ...
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2
answers
780
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Why is domU faster than dom0 on IO?
I have installed debian 7 on a physical machine. This is the configuration of the machine:
3 hard drives using RAID 5
Strip element size: 1M
Read policy: Adaptive read ahead
Write policy: Write ...
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4
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What are the benefits of "enterprise-level" virtualization?
For a company with modest virtualization needs - VirtualBox is currently doing fine at hosting a few light servers - what would some of the benefits be of moving to a more robust platform?
I'm ...
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1
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Xen.org Master/Slave in a pool with HA-Lizard
I have a pool of 3 servers with XCP only, each with 1 VM running on them, and managing them through XenCenter. Since the opensource version of xen does not have support for HA, I am using HA-lizard, ...
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RAID1 LVM, XEN and flashcache
I am regarding to question: Improving IO with FlashCache
I have setup a RAID1 (/dev/md0) LVM (/dev/vg_xen) and executed following command:
flashcache_create -p thru flashcache0 /dev/sdc /dev/md0
...
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2
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Determine which guest is running on XEN: HVM or PV guest
I'm working with a Xen host which is installed XenServer from Citrix by someone. He already installed a lot of CentOS 5.2 guests on the host. I wonder how to check those guests to know they are PV ...
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1
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681
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Xen hvc0 console size
Hello I got a Xen running using hvc0 for the guests. Everything works fine except for the size (lines and rows) of the console: It's always 80x25 what makes editing awkward sometimes. If the line one ...
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How to move a template from one xen nfs storage repository to another?
I have a bunch of templates on an NFS XCP 1.6 storage repository using thin provisioning for some of my VMs. I want to move the template's disks to a different NFS storage repository. There doesn't ...
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Xen: synchronizing time with Dom0
I have Xen virtual machines running on Debian 6 (both Dom0 and DomU).
I would like to synchronize clock on DomU with Dom0.
On http://wiki.xen.org/wiki/Xen_FAQ_DomU I have read that I need to set /proc/...
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Add OpenStack Compute to existing Xen based server
I have an existing server running Cenos 6.x with Xen 4.x and a dozen or so virtual machines. I'm building out an OpenStack environment and was wondering if is possible to install OpenStack compute on ...
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Grub can't find Xen multiboot file
I am running Debian Wheezy on a software RAID 0 with LVM. I'm trying to get Xen to work but grub refuses to boot in it. I installed Xen by following the instructions here: http://wiki.debian.org/Xen
...
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Creation of Xen VM fails with Error: Creating domain failed: name=buildbox03
Since a few hours, my xen VM does not want to be created.
The VM is quite unstable so I need to destroy and create is quite often. This morning I was able to do such a destroy-create cycle. A few ...
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1
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Cannot change date/time on virtualized centos install without a reboot
I have a dedicated web server which is running centos with xen virtualization that has centos installed on the vm. I do not have access to the parent server, I can only manipulate the vm, of which I ...
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2
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1k
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fix kernel on Xen Server hypervisor vps
I have a cloud server hosted at Rackspace, and they use Xen Server hypervisor. I was running Ubuntu 12.04, and really messed up by attempting to do a release upgrade manually.
The hypervisor ...
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1
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653
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XenServer xe CLI on OSX [closed]
Is there a port of the XenServer/XCP xe command-line tool to Mac OS X? Or, alternately, if this tool is open-source, what's the easiest way to get access to the source?
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Booting Ubuntu 12.10 guest on Debian 6.0.4 Xen with pygrub
I'm trying to run a Ubuntu 12.10 off a Debian 6.0.4 and Xen-4.0. I realised that pygrub might not be able to parse the menu.lst (I symlinked menu.lst to grub.cfg in /boot) and ended up with this ...
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Centos install in Xen problems
I'm running ubuntu 12.04.1, and I want to install CentOS 5 or 6 using network installation via http. Using xen images from http://mirror.centos.org/centos/5.7/os/x86_64/images/xen/
my config:
...
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2
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Strange Ubuntu boot up warning
I have a VM (Xen based), I can boot up the machine but there are some warning during the boot up.
Are they normal? If not, how to solved?
md: Scanned 0 and added 0 devices. ...
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1
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Split management network from data in Xen Server
I'm working on configuring our existing pool of four hypervisors running XenServer 6.1 to use a separate management network.
Currently the setup is a single link with a public address over which all ...
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1
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Changing the mac address in a libvirt xml config file breaks network connectivity for the guest
I'm using Xen with libvirt and trying to set it up on a bridged interface. I am able to install an OS and everything works as I would expect. If I save the xml output from "virsh dumpxml guest", edit ...
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1
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Network traffic is not being forwarded from a VM to the network using a bridged interface with Xen + libvirt
I'm having trouble getting network access from a VM that I'm running using Xen and libvirt. I've been trying different things and reading similar posts online for a couple of days but I'm really stuck ...
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How to get more I/O performance from Citrix XenServer?
I have a Citrix XenServer 6.1 installed on a HP Server (1x Intel Xeon E5630 @ 2.53GHz (4 cores, 8 threads, RAM: 752MB for dom0 and 55286MB for the guests). The server has 2 scsi mirrored disks and is ...
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3
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Xen memory management on small server
I am currently running VMware vSphere 5 on a server I use for various projects. Mainly I use it for honing my skills with administration and running a few game servers.
Recently I was considering a ...
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2
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mount a partition on an lvm partition
I have a xen dom0 server (named virtserver), which contains a guest machine, let's call it "virtguest".
The virtguest used to be a physical machine earlier, and the whole old disk (with several ...
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Xen hangs on boot when scrubbing RAM
I have a CentOS 5 server I can boot into the stock kernel just fine, but when I try kernel-xen, it gets stuck here:
When I try adding no-bootscrub to the kernel command line, I get this and a reboot:
...
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1
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Error: Cannot find ramdisk "hd(0)/boot/grub/menu.lst"
I have a dom0 and try to run domU with config like this:
kernel = '/root/xen/dist/install/usr/local/lib/xen/boot/pv-grub-x86_32.gz'
ramdisk = 'hd(0)/boot/grub/menu.lst'
vcpus = '2'
...
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2
answers
847
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Does Xen need an XServer for graphical display?
I'm trying to create a very small ISO, which is bootable and brings up a DomU such as Windows 7 using Xen. I want to setup the minimal number of packages in the small ISO, therefore I'm wondering if ...
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1
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Can I safely uninstall "Citrix Tools for Virtual Machines"?
Having several virtual servers with Windows 2008 R2 at our web hoster (Germany's "1&1", they seem to use Citrix Xen), I have every now and then some servers that hang (RDP login screen hangs ...
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Nagios: check services being orphaned?
Recently I noticed that there are some warnings in the nagios.log:
[1366060611] Warning: The check of service 'pt-deadlock-logger' on host 'xx' looks like it was orphaned (results never came back). ...
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3k
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How to reset root password CentOS (domU) hosted in Xen?
Need help on resetting root password of a CentOS which is a guess OS (domU) in XEN. I already tried to get to grub but it doesn't display or maybe using a different grub (pygrub). Thanks in advance.
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Setting up VPN on a VPS
I want set up a VPN in my Xen VPS with one static IP. What I should set in /etc/pptpd.conf as localip and remoteip.
I followed this tutorial: http://freehostinganswers.com/blog/how-to-install-your-...
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556
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ntpdate setting incorrect date after boot
I have a few Debian XEN virtual machines and upgraded them to wheezy(I need the 3.2 kernel for a project). Everything was okay until I rebooted on of the machines.
My current problem is, that ntpdate ...
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1
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2k
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Xen guest - cannot get network connection beyond the host
I've just installed a XenServer 6.1. It came with a standard configuration, network 0 connected to NIC 0.
I created a VM but I can't reach any network beyond the host.
From the VM (172.18.32.20), I ...
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1
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861
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Issues with Xen Kernel and Debian
My Xen installation has gone weird on me and I am trying to get back to normal.
I overflowed the base partition and in my haste to delete unused files I think I deleted something important, so now ...
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103
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Xen domU sees 35MB less than assigned
I am using ubuntu precise 12.04 and I am booting a paravirtualized ubuntu 12.04 domU, all being 64 bits. The VM has memory=1024 assigned and xentop at the host correctly shows 1024MB, but htop in the ...
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Migrate Windows XP to Xen HVM
I want to migrate a Windows XP machine to a Xen 4.1 HVM virtual machine with Windows XP installed (the custom software will only work with XP).
The software is custom made, and needs to be migrated ...
4
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3
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Use SSHFS on XenServer 6.1
On Xen Server 6.1, to backup my VMs, I use a script based on the following tools:
xe vm-list to build a list of the VMs to backup
xe vm-snapshot to take a snapshot of the VMs
xe template-param-set is-...
4
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3
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4k
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CentOS 6 Xen guest fails to boot after 'yum update'. Kernel?
I Seem to be having an issue with a Xen guest not booting after a yum update.
DomU Configuration:
#kernel = '/boot/solus-vmlinuz'
#ramdisk = '/boot/solus-initrd.img'
bootloader = '/usr/bin/...