Re: [Xen-users] Anyone able to NFS boot on xen 4.x ?

[Felix Kuperjans <felix@xxxxxxxxxxxxxxxxxx>]

I am using NFS root filesystem for many of my domUs on XEN 4.0.0 for
rescue systems.

It's just as it should be:

domu.cfg:

# General information:
name       = "Rescue"
memory     = 2048
vcpus      = 4

# Boot configuration:
kernel     = "/mnt/public/xen/linux-rescue"
root       = "/dev/nfs"
nfs_root   = "/mnt/rescue"

# Additional configuration:
nographic  = "yes"
timer_mode = 1

# Kernel network configuration:
interface  = "eth0"
ip         = "10.157.0.1"
netmask    = "255.252.0.0"
gateway    = "10.156.0.1"
hostname   = "rescue.domain"
nfs_server = "10.156.0.1"

# Network interfaces:
vif        = [ "mac=00:16:3e:9d:00:01,vifname=vif-rescue" ]

# Virtual disks:
disk       = [ ]


Some things you need to do:

1. Root filesystem over NFS support in the domU kernel
2. NFS export on Dom0 ro or rw and only IP-based authentification
3. Use NFSv3; NFSv4 has no root-fs support without an initrd and many
extra settings.
4. Network settings must be correct at boot time (kernel level
autoconfiguration), so have to adopt my settings to your network setup
(mine is routing with internal IPs, NAT and much firewalling, far away
from default bridging)

Regards,
Felix Kuperjans

Am 28.05.2010 18:50, schrieb Bruce Edge:
> Has anyone been able to get domU NFS boots working with any version of
> Xen 4.x? If so, can you please post your config? Both the dom0 Xen
> version & kernel, as well as the domU config file.
>
> I've spent a lot of time running through all the docs, HOWTO's and
> published configs and assorted patches for Ubuntu 9x-10x and Xen 4x
> trying NFS booting with each. I'm not going to document all the
> failure modes here as I've already posted most to the xen-devel list.
>
> I'm starting to think that it plain doesn't work with Xen 4. Does
> anyone else use this?
>
> Thanks in advance.
>
> -Bruce
>
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>
>   

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