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RE: [Xen-users] DomU image file on NFS Storage

  • To: "'Xen Users List'" <xen-users@xxxxxxxxxxxxxxxxxxx>
  • From: <admin@xxxxxxxxxxx>
  • Date: Sat, 8 Oct 2011 08:54:54 -0500
  • Delivery-date: Sat, 08 Oct 2011 06:56:24 -0700
  • Importance: Normal
  • List-id: Xen user discussion <xen-users.lists.xensource.com>
  • Thread-index: AcyFd+6/uxWkggtZQD26X2cxF0jJ2AASbyog

In Xen, you need to create a Storage Repository for the NFS share instead of trying to manually make the connection to the NFS share.  Then Xen will be able to use the NFS share for storing DomU images.


-----Original Message-----
From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx [mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Antonio Colin
Saturday, October 08, 2011 12:03 AM
To: Xen Users List
Subject: [Xen-users] DomU image file on NFS Storage


Hi everyone,


I have created a CentOS4 PV on a Xen host contained in a *.img file. Now I want to store that image file

on a NFS server. Does anyone have a config.sxp file example and want to share it on a pastebin service?


I have put the *.img on an NFS server, then mounted the img using #mount -o loop image.img /mnt/centos

and then exported it to the xen host but it does not work since the DomU kernel does not have Root NFS support.


How can I do instead to read directly from the xen host the *.img file stored in the NFS server, I think it would

look like: nfs_root = "/mnt/images/centos/image.img".


** This does not work at all, it ends up with a kernel panic on console.


kernel = "/mnt/images/centos/boot/vmlinuz-2.6.9-89.ELxenU"

ramdisk = "/mnt/images/centos/boot/initrd-2.6.9-89.ELxenU.img"

memory = 512

name = "centos4"

vcpus = 1

vif = ['']

dhcp = "dhcp"

ip = ""

netmask  = ""

gateway  = ""

hostname = "centos4"

nfs_root = "/mnt/images/centos/"

nfs_server = ""

root = "/dev/root"

on_reboot   = 'restart'

on_crash    = 'restart'



I would really appreciate one example or config option.




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