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[Xen-users] Help - Using the NFS server under DomU

  • To: xen-users@xxxxxxxxxxxxxxxxxxx
  • From: Eric Tessler <maiden1134@xxxxxxxxx>
  • Date: Mon, 20 Mar 2006 22:08:23 -0800 (PST)
  • Delivery-date: Tue, 21 Mar 2006 06:09:53 +0000
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  • List-id: Xen user discussion <xen-users.lists.xensource.com>

I am trying to use the NFS server (NFS version 3) in my VM using a DomU kernel (Fedora Core 3 - It is not working for me. I see that many other people got it to work and I can't seem to find anywhere that tells me what the problem might be.
For DomU, I enabled all of the appropriate NFS modules (statically linked in the kernel), rebuilt the kernel, updated my VM to use the new kernel (including copying all of the lib/modules to the VM) and booted my VM. I started the NFS server (everything starts OK) and shared a folder in the VM. According to exportfs, my folder is shared. When I try to mount to the share either locally from within the VM itself or remotely from an NFS client, I get the following error message:
   mount -t nfs /mnt
   mount: failed, reason given by server: Permission denied
Here's the wierd thing - If I shutdown my VM and update its config file to use an NFS-enabled Dom0 kernel (, everything works fine. I start NFS after the VM boots and from my client I can now mount to my share and see the files in the share. I don't understand why domU is not working (my network is working fine and I don't have iptables enabled).
My NFS share is shared the following way (contents from /etc/exports):
   /tmp       *(ro,sync,no_subtree_check,no_root_squash)
Any help here would be greatly appreciated; I am completely stuck on this issue.

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