I have been running my LTSP server on a Ubuntu Lucid 10.04 host. My clients are
all fat clients using NBD.
I would now like to migrate my installation to a new server running Ubuntu
Precise 12.04. I have set up a new Precise 12.04 chroot from scratch on the new
server. It seems to be working fine.
My Lucid 10.04 server currently serves a Natty 11.04 chroot. I would like to
continue to offer Natty 11.04 on the new server. I would prefer not having to
set up a Natty 11.04 chroot from scratch on the new server because I have quite
a bit of customization that I would have to repeat.
I figured I could try merely copying the Natty 11.04 chroot from the Lucid
10.04 server to the Precise 12.04 server. Unfortunately that doesn't seem to
work right out of the box. From the errors I get it looks like maybe either NBD
and/or squashfs version differences between the two OS levels are causing the
problem:
Lucid:
nbd-server 2.9.14
mksquashfs 4.0
Precise:
nbd-server 2.9.25
mksquashfs 4.2
When I boot the Natty image using the standard Lucid line ...
KERNEL natty/vmlinuz
APPEND ro initrd=natty/initrd.img nbdport=2000 init=/sbin/init-ltsp
… I get nbd0 I/O errors, but at least it seems to be talking to the NBD server.
This makes me think it might be a squash problem.
When I boot the Natty image using a line copied from Precise ...
KERNEL natty/vmlinuz
APPEND ro initrd=natty/initrd.img root=/dev/nbd0 init=/sbin/init-ltsp
nbdroot=:ltsp_natty
… I get an nbd-client syntax error.
So that's the background. Does anybody have any ideas how to go about achieving
what I want, i.e. copying a Natty chroot from a Lucid server to a Precise
server? I can think of two general approaches:
- Make some small changes in the Natty chroot, i.e. maybe install newer
versions of nbd and alter the lines that mount the nbd.
- Do an ltsp-build-client for Natty and then copy in all the non-ltsp stuff
from the Natty chroot I want to migrate.
Any suggestions?
--
Matthew
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