LTSP-Cluster with 10.04 setup question

[Nicolas Roussi]

Hi all,
let me start off by saying that I just installed 10.04 on a VM and it looks
and feels beautiful. By the way if anyone installs it as a virtual box
guest, run the vobxadditions and before you restart you need to manually
edit /usr/src/vboxvideo-x.x.x/vboxvideo_drm.c
and add the following lines:
Find the line .release = drm_release,
and add the following below:
#if defined(DRM_UNLOCKED) || LINUX_VERSION_CODE>= KERNEL_VERSION (2, 6, 33)
        .unlocked_ioctl = drm_ioctl,
#else
                 .ioctl = drm_ioctl,
#endif
--->up to the #endif
                 .mmap = drm_mmap,
               ......

As of today virtual box forums say that the fix will be included in the next
release.

Now, I want to make use of the LTSP-cluster feature that was available from
9.10 but after reading this guide
https://help.ubuntu.com/community/UbuntuLTSP/LTSP-Cluster I am confused.

First question: will this work on 10.04 since the page says it is specific
to 9.10 only?

Second: If my main subnet is 192.168.2.x and the thin client subnet is
192.168.0.x where is each server on? I understand you need to have one
server called the root server, several application servers, the NFS file
server with /home on it and an LDAP server. I need to increase the amount of
thin clients to ~350 from 85 that I have now. The way that I am setup now
does not involve any clustering.
This is my setup:
192.168.2.x
   |--->eth0 of LDAP server
   |--->eth0 of edubuntu server #1 with LDAP client and NFS server with all
/home
        |---->eth1 192.168.0.x ~40 clients
   |--->eth0 of edubuntu server #2 with LDAP client and NFS client to #1
        |---->eth1 192.168.0.x ~45 clients

This setup has worked perfectly for many years but I see the possibilities
with ltsp clustering and would like to have a setup like that.
In the section "Root server for LTSP Clustering" in the guide mentioned
above, it says to install the dhcp server on it but it does not mention what
subnet eth0 and eth1 lie on. Or maybe I am not understanding well? It is
mentioned that the dhcpd.conf file that needs to be edited is the one in
/etc/dhcp3 and not /etc/ltsp which my servers are currently using.

If anyone can point me towards a working guide for lucid on ltsp clustering
it would be greatly appreciated.

Thanks

-- 
Nicolas Roussi
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