The Xen (pronounced zen) hypervisor runs directly on the hardware and then starts a priviledged virtualized system called "Dom0". You can regard that as xen-controller. From the Dom0 system you can create other virtualised systems called Domains that Xen literature calls DomU. Xen works with ...
0
votes
1answer
28 views
XEN vm disk quota / fstab commented out
In order to enable user quota on a debian system I must edit the /etc/fstab (http://tldp.org/HOWTO/Quota-3.html).
But in my case the whole /etc/fstab on the vm is commented out:
# /etc/fstab: static ...
1
vote
2answers
38 views
Dedicated memory for Xen dom0?
How to assing the dedicated memory for the xen host system dom0 permamently and how to preventing dom0 memory ballooning ? also what is the minimum memory need for the xen host dom0 when it as already ...
2
votes
1answer
28 views
How to route the public ip of xen guest outside of host system?
I have an xen kernel installed in centos 5. In that xen kernel, i have decide to create the guest os with public ip for amanda backup server . But i cannot able access the guest os using public ip. ...
0
votes
2answers
45 views
Xen domU can't have access to outside dom0
I have successfully installed xen and run a domU on a debian squeeze.
I have followed step by step this tutorial here. I can log in my domU by SSH but from the domU I can't connect to anything but ...
0
votes
2answers
168 views
CentOS randomly restarts
My CentOS 5.7 server randomly restarts. I've found the following in /var/log/messages:
Jan 24 01:54:53 m38501 dhcpd: DHCPINFORM from 80.xxx.xxx.xxx via eth0
Jan 24 01:54:53 m38501 dhcpd: DHCPACK to ...
1
vote
0answers
55 views
Why I get different network traffic values from dom0 and from domU?
I'm using Xen 4.0.1 with Linux 2.6.32-5-xen-amd64 (standard packages on a Debian Squeeze system).
From Xen Networking:
For each new domU, Xen creates a new pair of "connected virtual ethernet
...
0
votes
1answer
31 views
resize a xen hvm disk
Ok,
I am trying to resize a Xen HVM disk. I have added the space to the vm as you can see here it is now 780GB.
--- Logical volume ---
LV Name /dev/VM_VolGroup/vm104_img
VG Name ...
0
votes
0answers
38 views
Convert libvirt Xen configuration to native
I've configured some virtual machine under Xen on Debian Squeeze using libvirt with virsh.
Now I want to get rid of the libvirt layer, because I need to configure some specific parameters on the DomUs ...
0
votes
0answers
52 views
What Virtualization Servers support windows clients with Direct X? [migrated]
In advance I'd like to state this question is similar to its predecessors here and here but, those questions are old and I would like an up to date answer based on current technology.
I want to host ...
3
votes
1answer
76 views
Odd log entries and insane bandwidth usage
I have a CentOS cloud server I use for testing and noticed that in the past 30 days, bandwidth out has gone through the roof (16,000 GB to be precise)
When I initially attempted to check on the ...
0
votes
0answers
24 views
Pimp my cloud server [migrated]
I am trying to consolidate all my home servers(HTPC,HTTP,FTP,etc) into a single system along with gaining a ton of network storage. So at the beginning of last year I started buying hardware, then I ...
4
votes
1answer
74 views
PCI DSS compliance on a virtualized server running Xen
I have a server running xen with HVM and would like to make one VM PCI compliant. I've read the PCI virtualization guide and it says that I need to make sure there is no information leakage between ...
0
votes
4answers
85 views
Network traffic accounting of Xen VMs
How do I monitor network traffic usage on Xen virtual machines running on Debian GNU/Linux Squeeze?
I have a number of Xen virtual machines (domUs) running on a few physical machines (dom0s). Each ...
0
votes
1answer
29 views
On-line backing up Xen virtual machines running on Ext4fs
What methods exist for backing up Xen virtual machine contents? I have some virtual servers running on LVM / Ext4 disks. Preferably a method which can be directly executed over SSH / network ...
0
votes
0answers
75 views
How to create a Centos Xen domU on Debian Squeeze using xen-create-image
I have a Xen host system based on Debian Squeeze, and installed xen-tools. I would like to setup a CentOS domU using xen-create-image. xen-tools already 'knows' of CentOS-5, but I cannot seem to get ...
1
vote
2answers
106 views
How to Manually Xen bridging setup on OpenSUSE for two DomU
I've been having problems with Xen networking on OpenSUSE, specifically with getting Dom0 opening a TCP connection to the DomU. Other machines on the network can open TCP connections to all 3, so I'm ...
0
votes
1answer
54 views
Hypervisor to have VMs for users logging in/out of the host machine?
I'm looking for a solution for the following workflow: Let's say I have 4 dedicated users on my CentOS box dedicated for QA purposes. This box has a hypervisor running 4 separate VMs concurrently, ...
0
votes
1answer
139 views
Ubuntu 10.04 (LTS) DomU on Debian Wheezy Dom0 Xen 4
I have been forced to move from a
Centos Dom0
xen 3
Centos + Ubuntu Lucid DomUs
To
Debian Wheezy Dom0
Xen 4
Ubuntu Lucid DomUs
However although I can create new DomUs on wheezy I cannot ...
0
votes
1answer
80 views
Pacemaker behavior colocation Xen domU resources, is this expected?
I am using Pacemaker+OpenAIS+Corosync on OpenSuSE 11.3 running Xen, and am trying to determine if the behavior I see when colocating Xen domU resources is expected or not.
Cluster nodes / dom0:
...
0
votes
0answers
54 views
domU networking is better than dom0
I am using a 2.6.35 domU guest on a 2.6.32 dom0 and a 4.0.1 Xen hypervisor. Using netperf with UDP_RR I get 1819 and 622 transaction per second for domU and dom0 respectively, but in UDP_STREAM test ...
3
votes
3answers
197 views
Xen only sees 512MB of System RAM. Should be 8GB. (UEFI boot)
I am booting Xen 4.0 from Debian Squeeze, kernel 2.6.32-5-xen-amd64. "xm dmesg" on dom0 shows:
Xen-e801 RAM map:
0000000000000000 - 0000000000091400 (usable)
0000000000100000 - 0000000020000000 ...
1
vote
2answers
63 views
Xen: how to limit IPs for VMs
How can i limit Xen VMs so that they only work with some specified IPs?
Eg.: vm01 should have IP 192.168.0.2. If it tries to change to another IP, it will simply not work and vm will lose ...
0
votes
2answers
123 views
VNC connection to EC2 instance without installing a VNC server
I was wondering if it was possible to connect to an Amazon ec2 instance via VNC, but instead of installing a VNC server in the target machine, somehow connect it to the hypervisor's graphics output ...
1
vote
2answers
90 views
Setting up CIFS ISO Repository for Xen
I recently started working with Xen, to try to make better use of an extra desktop box for development testing. I'd like to be able to do OS installs on it without having to burn discs, but I'm having ...
2
votes
1answer
50 views
Giving Virtual Machines in Xen their own IP Addresses
Installed Xen on a server at home, recently moved it to a data center. Worked fine with DHCP behind my router, with each virtual server and the dom0 getting its own IP address.
At the data center, ...
1
vote
4answers
187 views
A better inexpensive 2 node cluster
There is a Xen cluster that setup that I really like. It consists of 2 nodes (let's call them 1 and 2). Each node has 2 non-raided drives (A and B). A1 replicates to A2 through DRBD and B2 to B1.
...
0
votes
0answers
33 views
How to resize domU disk in xen
I want to reduce the domU disk. I see how make it bigger (http://serverfault.com/questions/334586/howto-resize-xen-virtual-host-disk-size-on-debian)
but how I can reduce it?
I don't use LVM.
1
vote
1answer
104 views
virsh slow execution
I'm using libvirt with Xen 4. Every time I use the virsh tool, it takes a long time until it's started. I start virsh on the same machine where the Xen hypervisor resides.
Example:
root@xen1:~#: ...
-1
votes
2answers
75 views
Turning physical linux server into several virtual servers [closed]
I'd like to create several virtual servers (all running linux) on my physical server. All of them will be used as headless servers - ie. they'd be the equivalent of an EC2 instance but running on my ...
2
votes
2answers
142 views
All Xen domU LVM volumes corrupt after reboot
I'm running a Debian Squeeze dom0, and after rebooting it all 7 of my domUs have data corruption. Each is setup as ext3 partition directly on a separate lvm2 volume. None of the lvm volumes will ...
0
votes
1answer
77 views
DIY: automate cloning of Xen VMs, gold templete?
looking for DIY way without commercial tools like XenServer LabManager product.
0
votes
0answers
304 views
AMD Fusion GPU passthrough to KVM or Xen
Has anyone successfully gotten a passthrough working with the GPU portion of AMD's Fusion APUs (the E-350 is my target) on top of a Linux hypervisor? IE, I want to dedicate the GPU to one VM only, ...
3
votes
3answers
225 views
Domain-0 high CPU load
My Xen HVM machine has 4 cores on 2.4 Ghz however top gives me a load of 2-3. There are running 20 VM's on it (most of them are idle). The HDD is also almost idle (200 KB/s write and 6 KB/s read).
...
0
votes
1answer
44 views
xen domUs crashes or unavailability
I've xen server with 8 domU.
Server is Xeon E31270 with 16gb ram. I think it is enough for 8 machines.
Sometimes domU's crashes and i can't figure out the reason.
After crash i can connect to console ...
1
vote
0answers
81 views
How do I install xen hypervisor + linux onto a usb memory stick
I'm wanting to create a bootable Linux + Xen Hypervisor on a USB stick.
I have it working how I want on a hard drive but for cloud deployment I'd like it to boot xen to a ram disk and mount the ...
0
votes
2answers
61 views
Xen host and guest sharing same IP
Is it possible for both Xen host and Xen guest to share same IP (albeit with different ports)?
We have a single public IP, and want to have both the Xen host (as host only, no other role) and the Xen ...
0
votes
2answers
140 views
Free virtualization system with clone vm feature
I need virtualization system, based on kvm or Xen with Web interface, or windows gui, which support cloning vms. One more point is that I can not install it from iso (server is located in hetzner). ...
1
vote
2answers
99 views
Physical to Virtual Xen on Debian Squeeze
I'm trying to migrate various services from a physical Debian Squeeze box to a number of para-virtualised Xen machines. This is my first venture into Xen, so I'm planning on doing this step by step:
...
1
vote
3answers
123 views
netconsole or serial logging in XenServer DomU
I have some problems with stability of Debian guests in my XenServer hosts.
To debug this problem I wanted to use netconsole kernel module, unfortunately, because the Ethernet controller is emulated, ...
0
votes
1answer
128 views
How do I tell real CPU load in a xen environment?
I have a Debian machine with 4 CPU cores running Xen with two virtual machines, and I'm having trouble determining overall real CPU usage.
Each machine has two VCPUs assigned to it with no cap on CPU ...
0
votes
2answers
97 views
Howto resize Xen virtual host disk size on Debian?
I am using a loop device disk setup (not lvm) for Xen Debian (squeeze) guest systems on my Debian (squeeze) host system.
I searched for a way of extending guest system disk size. I came accross ...
0
votes
0answers
84 views
How to forward OpenVPN Port to NAT'd XEN domU
I want to install a OpenVPN domU on XEN.
Dom0 and domU are running Debian Squeeze, all domU are on a NAT'd privat network 10.0.0.1/24
My VPN-Gate is von 10.0.0.1 and running.
How can I make it ...
0
votes
1answer
34 views
Xen DomU: jfs support
I have a domU that I plan to use the standard xen-kernel of my dom0 (Xen 4, Linux kernel 2.6.32-5-xen-amd64). On this domU I want to make all partitions jfs. (currently I am working in a testing domU ...
1
vote
1answer
70 views
Multiple Xen instances through 1 single IP
I am a developer with not much networking experience, here is my situation:
I have a server with one reputable provider, managed to get Xen running with lots of LVM space to get around 3 virtual ...
0
votes
1answer
173 views
Xen Disk Performence Issues
I'm currently using Xen PV on CentOS 5 with my domU's as flat files running on a hardware RAID controlled (write cache enabled) formatted with XFS. On the dom0 I can get about 500MB/s in a 2GB dd ...
1
vote
0answers
109 views
64 bit HVM guest freezes while booting on Debian Lenny 64 bit Xen hypervisor
I'm trying to create an x86 64 bit guest machine on an old Debian Lenny x86 64 bit hypervisor using HVM. The physical CPU is a first generation Intel i7 with VT-x support. Xen recognizes the VT-x ...
2
votes
2answers
84 views
What is a good way to develop images or templates that can be used on Xen, KVM and EC2?
I want to make images to do simple network services (e.g. serve a web app, run a memcached, or whatever). It would be really nice to develop an image once, test locally, and then be able to deploy it ...
0
votes
2answers
197 views
xvda1 is 100% full, What is it? how to fix?
I'm running a Linux instance on EC2 (I have MongoDB and node.js installed) and I'm getting this error:
Cannot write: No space left on device
I think I've tracked it down to this file, here is the ...
2
votes
1answer
107 views
SLES 10 SP1 domU eth0 not up at boot
I have a SLES 10 SP1 domU on a SLES 11 SP1 dom0 for the purposes of a build server. After moving around some file systems, when I rebooted the domU, the networking no longer worked. When logging in ...
0
votes
1answer
85 views
Xen VM won't start: “Cannot plug VIF”
I've got a VM on a citrix xenserver 5.0.0 machine that won't start. it was running fine until it was rebooted on a Fri afternoon, a few weeks ago.
Starting it from the (windows-only) xencenter GUI ...
