[K12OSN] Bondi Mac booting ltsp

[Jim McQuillan]

Chuck and Jim,

There's a much better solution to the problem, that doesn't require
hard-wiring a directory.

When a DHCP client sends a request, it sends a vendor-class-identifier,
so that the dhcp server knows something about the client.
PXE bootroms send 'PXEClient'.  Etherboot bootroms send 'Etherboot'.

Well, we just need to tell the dhclient in the ppc initrd to send
something unique, that we can identify it by.  Then, in dhcpd.conf, we
can have an entry like this:

 if substring (option vendor-class-identifier, 0, 8) = "PPC_LTSP" {
   option root-path "192.168.0.254:/opt/ltsp/ppc";
 }
 else{
   option root-path "192.168.0.254:/opt/ltsp/i386";
 }


That is, assuming we set the vendor-class-identifier to 'PPC_LTSP' in
the initrd.  it's WAY more flexible than having a sed script modify the
root-path that is returned.

Jim McQuillan
jam at Ltsp.org



On Thu, 27 Jan 2005 cliebow at downeast.net wrote:

> if bill_c could add one linje to auto-switch /opt/ltsp/i386 to
> /opt/ltsp/ppc using sed within mthe ppc initrd then root path could be perm
> set as /opyt/ltspi86..the other dhcp options i think are ore or less
> ignored by those ws that dont need them..that would pretty much do it..
>
> chuck
> > Well I have a Bondi iMac booting successfully as a true thin from an iBook
> > while simultaneously booting a Term150 and another iBook as a true thin.
>  Only
> > glitch so far is the iBook is cut off about 2 inches (need info on setting
> > smaller screen size in XF86Config, when I trmore or less ignoredy to
> manually adjust the vsync and
> > hsync my screen goes into diagonal lines).  So I should be able to get
> > documentation together now for setting up both ppc and i386 servers to boot
> > new world macs as thin clients (no fancy keystrokes, X queries, or local
> > installs first, I mean diskless thin terminals that boot automatically to
> ltsp).
> >
> > Right now dhcp.conf has to be manually populated with MAC addresses for
> > whoever the odd ducks are.
> >
> > So here is a question for anyone who dare answer.  In dhcpd.conf we
> specify a
> > option root-path "ser.er.ip.add:/opt/ltsp/kernelpref"; and some other vendor
> > specific options.
> > Since the first half of a MAC address specifies a vendor (which in theory
> > shouldn't change) can this option be made into an if statement stating
> > something along the lines of:
> >
> > if hardware ethernet 00:05:02:*:*:* (may be a sequence of vendors to cover
> > whoever was producing the NIC for Apple at the time)
> > then all of the mac options
> > else all of the i386 options
> >
> > If something like this is possible then I think out of the box support
> for MAC
> > would be very easy to achieve.  Otherwise a simple script could be written to
> > convert the necessary default lines of dhcpd.conf to either support ppc or
> > i386 with the directory structure for both on hand
> > (/opt/ltsp/i386,/opt/ltsp/ppc).
> >
> > Sorry to ramble here I am just pumped that this is working.
> >
> > Thanks for everyones help.
> >
> > Jim Kronebusch
> > Cotter Tech Department
> > 507-453-5188
> >
> >
> > --
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> >
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